Sharepoint 2010 with excel 2010 error - c#

This is the first question for me on this site, and I wish my issue will be solved by you :)
I am creating a small utility which reads from a SharePoint List and from Excel sheet in order to map fields for doing some kind of migrating data from excel to SP list,
The utility is first populating SP lists from SharePoint depending on the URL provided, then loads columns for the selected List in a Datagrid, then it reads excel sheet and populates all columns in another datagrid:
the first problem I faced was that I was not able to add Microsoft.Sharepoint.dll this was solved by changing .Net Framework from .NET Framework 4 Client Profile to .NET Framework 3.5 since I got the below error:
Error 1 The type or namespace name 'SharePoint' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?)
So Far SharePoint is working fine, Now when attempting to read from Excel sheet, I get error the below Error:
I have used OLEDB and ODBC connections as below, but none worked under x64:
string sConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + this.textBox3.Text + ";Extended Properties='Excel 8.0;HDR=Yes;IMEX=1'";
The 'Microsoft.Jet.OLEDB.4.0' provider is not registered on the local machine.
string sConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + this.textBox3.Text + ";Extended Properties=Excel 12.0;";
The 'Microsoft.ACE.OLEDB.12.0' provider is not registered on the local machine.
string sConnectionString = "Driver={Microsoft Excel Driver (*.xls, *.xlsx, *.xlsm, *.xlsb)};DBQ="+ this.textBox3.Text +"";
ERROR [IM002] [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified
After some search, I read that we need to build this application under 86x to solve excels issue, I did that and the problem was solved for excel, but now SharePoint is not working and giving the error message below:
The Web application at
http://localhost/ITO could not be
found. Verify that you have typed the
URL correctly. If the URL should be
serving existing content, the system
administrator may need to add a new
request URL mapping to the intended
application.
As you see, Excel Columns are populated here, but SharePoint is giving error!!
Any Idea in how to let both of them work in the same application??

Microsoft.SharePoint.dll is only for Applications running on the SharePoint server, not for Apps running on a client machine. For Client Applications, use the Client Object Model or the Web Services.
When using the SharePoint DLLs, the Application must be x64, not x86 (the default for Console Apps) or AnyCPU - SharePoint 2010 is 64-Bit only. (The above Client OM works on 32-Bit of course)
When using the SharePoint DLLs, use .net 3.5, but you already figured that out :)
Technically, using Microsoft.SharePoint.dll outside of SharePoint (either the website or a timer job) isn't supported either - it works in most cases though.

I would start by saying that Sharepoint 2010 need to be run in 64bit and on .net 3.5. Get that sorted, and your sharepoint will work. You might then have to install 64bit version of excel to get it working on the same platform.
WHat you have now is a hotch potch of 3.5 and 4.0, and 64 bit and 32 bit parts, which will never work together.

I have installed MS office for 64 bits and that solved my issue :)

Related

c#,shared folder,windows server [duplicate]

I'm trying to read an Excel (xlsx) file using the code shown below. I get an "External table is not in the expected format." error unless I have the file already open in Excel. In other words, I have to open the file in Excel first before I can read if from my C# program. The xlsx file is on a share on our network. How can I read the file without having to open it first?
Thanks
string sql = "SELECT * FROM [Sheet1$]";
string excelConnection = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + pathname + ";Extended Properties=\"Excel 8.0;HDR=YES;IMEX=1;\"";
using (OleDbDataAdapter adaptor = new OleDbDataAdapter(sql, excelConnection)) {
DataSet ds = new DataSet();
adaptor.Fill(ds);
}
"External table is not in the expected format." typically occurs when trying to use an Excel 2007 file with a connection string that uses: Microsoft.Jet.OLEDB.4.0 and Extended Properties=Excel 8.0
Using the following connection string seems to fix most problems.
public static string path = #"C:\src\RedirectApplication\RedirectApplication\301s.xlsx";
public static string connStr = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties=Excel 12.0;";
Thanks for this code :) I really appreciate it. Works for me.
public static string connStr = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties=Excel 12.0;";
So if you have diff version of Excel file, get the file name, if its extension is .xlsx, use this:
Private Const connstring As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties=Excel 12.0;";
and if it is .xls, use:
Private Const connstring As String = "Provider=Microsoft.Jet.OLEDB.4.0;" & "Data Source=" + path + ";Extended Properties=""Excel 8.0;HDR=YES;"""
(I have too low reputation to comment, but this is comment on JoshCaba's entry, using the Ace-engine instead of Jet for Excel 2007)
If you don't have Ace installed/registered on your machine, you can get it at: https://www.microsoft.com/en-US/download/details.aspx?id=13255
It applies for Excel 2010 as well.
Just add my case. My xls file was created by a data export function from a website, the file extention is xls, it can be normally opened by MS Excel 2003. But both Microsoft.Jet.OLEDB.4.0 and Microsoft.ACE.OLEDB.12.0 got an "External table is not in the expected format" exception.
Finally, the problem is, just as the exception said, "it's not in the expected format". Though it's extention name is xls, but when I open it with a text editor, it is actually a well-formed html file, all data are in a <table>, each <tr> is a row and each <td> is a cell. Then I think I can parse it in a html way.
I had the same problem. which as resolved using these steps:
1.) Click File
2.) Select "save as"
3.) Click on drop down (Save as type)
4.) Select Excel 97-2003 Workbook
5.) Click on Save button
I had this same issue(Using the ACE.OLEDB) and what resolved it for me was this link:
http://support.microsoft.com/kb/2459087
The gist of it is that installing multiple office versions and various office sdk's, assemblies, etc. had led to the ACEOleDB.dll reference in the registry pointing to the OFFICE12 folder instead of OFFICE14 in
C:\Program Files\Common Files\Microsoft Shared\OFFICE14\ACEOLEDB.DLL
From the link:
Alternatively, you can modify the registry key changing the dll path to match that of your Access version.
Access 2007 should use OFFICE12, Access 2010 - OFFICE14 and Access
2013 - OFFICE15
(OS: 64bit Office: 64bit) or (OS: 32bit Office: 32bit)
Key: HKCR\CLSID{3BE786A0-0366-4F5C-9434-25CF162E475E}\InprocServer32\
Value Name: (Default)
Value Data: C:\Program Files\Common Files\Microsoft
Shared\OFFICE14\ACEOLEDB.DLL
(OS: 64bit Office: 32bit)
Key:
HKCR\Wow6432Node\CLSID{3BE786A0-0366-4F5C-9434-25CF162E475E}\InprocServer32\
Value Name: (Default)
Value Data: C:\Program Files (x86)\Common Files\Microsoft
Shared\OFFICE14\ACEOLEDB.DLL
I have also seen this error when trying to use complex INDIRECT() formulas on the sheet that is being imported. I noticed this because this was the only difference between two workbooks where one was importing and the other wasn't. Both were 2007+ .XLSX files, and the 12.0 engine was installed.
I confirmed this was the issue by:
Making a copy of the file (still had the issue, so it wasn't some save-as difference)
Selecting all cells in the sheet with the Indirect formulas
Pasting as Values only
and the error disappeared.
I was getting errors with third party and Oledb reading of a XLSX workbook.
The issue appears to be a hidden worksheet that causes a error. Unhiding the worksheet enabled the workbook to import.
If the file is read-only, just remove it and it should work again.
I know this is a very old post, but I can give my contribution too, on how I managed to resolve this issue.
I also use "Microsoft.ACE.OLEDB.12.0" as a Provider.
When my code tried to read the XLSX file, it received the error "External table is not in the expected format."
However, when I kept the file open in Excel and then the code tried to read it ... it worked.
SOLUTION:
I use Office 365 with company documents and in my case, the solution was very simple, I just needed to disable the sensitivity of the document, setting it to "public".
Detail: Even after saving as "public" the green check still remained marked in "Internal Use", but the problem remained solved after that.
I had this problem and changing Extended Properties to HTML Import fixed it as per this post by Marcus Miris:
strCon = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" & importedFilePathAndName _
& ";Extended Properties=""HTML Import;HDR=No;IMEX=1"";"
ACE has Superceded JET
Ace Supports all Previous versions of Office
This Code works well!
OleDbConnection MyConnection;
DataSet DtSet;
OleDbDataAdapter MyCommand;
MyConnection = new System.Data.OleDb.OleDbConnection(#"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=..\\Book.xlsx;Extended Properties=Excel 12.0;");
MyCommand = new System.Data.OleDb.OleDbDataAdapter("select * from [Sheet1$]", MyConnection);
DtSet = new System.Data.DataSet();
MyCommand.Fill(DtSet);
dataGridView1.DataSource = DtSet.Tables[0];
MyConnection.Close();
Ran into the same issue and found this thread. None of the suggestions above helped except for #Smith's comment to the accepted answer on Apr 17 '13.
The background of my issue is close enough to #zhiyazw's - basically trying to set an exported Excel file (SSRS in my case) as the data source in the dtsx package. All I did, after some tinkering around, was renaming the worksheet. It doesn't have to be lowercase as #Smith has suggested.
I suppose ACE OLEDB expects the Excel file to follow a certain XML structure but somehow Reporting Services is not aware of that.
the file might be locked by another process, you need to copy it then load it as it says in this post
This can also be a file that contains images or charts, see this: http://kb.tableausoftware.com/articles/knowledgebase/resolving-error-external-table-is-not-in-expected-format
The recommendation is to save as Excel 2003
Just adding my solution to this issue. I was uploading a .xlsx file to the webserver, then reading from it and bulk inserting to SQL Server. Was getting this same error message, tried all the suggested answers but none worked. Eventually I saved the file as excel 97-2003 (.xls) which worked... only issue I have now is that the original file had 110,000+ rows.
If you still have this problem, then check your permissions, I tried many of these suggestions and my concrete problem was that the file that I wanted to process was under source control and the thread had no permissions, I had to change the entire folder permissions and it started to work (I was processing many files in there)... It also matches many suggestions like change the name of the file or check that the file is not loicked by another process.
I hope it helps you.
Instead of OleDb, you could use the Excel Interop and open the worksheet as read-only.
https://msdn.microsoft.com/en-us/library/microsoft.office.interop.excel.workbooks.open(v=office.15).aspx
This can occur when the workbook is password-protected. There are some workarounds to remove this protection but most of the examples you'll find online are outdated. Either way, the simple solution is to unprotect the workbook manually, otherwise use something like OpenXML to remove the protection programmatically.
I recently saw this error in a context that didn't match any of the previously listed answers. It turned out to be a conflict with AutoVer. Workaround: temporarily disable AutoVer.
That excel file address may have an incorrect extension. You can change the extension from xls to xlsx or vice versa and try again.
I recently had this "System.Data.OleDb.OleDbException (0x80004005): External table is not in the expected format." error occur. I was relying on Microsoft Access 2010 Runtime. Prior to the update that was automatically installed on my server on December 12th 2018 my C# code ran fine using Microsoft.ACE.OLEDB.12.0 provider. After the update from December 12th 2018 was installed I started to get the “External table is not in the expected format" in my log file.
I ditched the Microsoft Access 2010 Runtime and installed the Microsoft Access 2013 Runtime and my C# code started to work again with no "System.Data.OleDb.OleDbException (0x80004005): External table is not in the expected format." errors.
2013 version that fixed this error for me
https://www.microsoft.com/en-us/download/confirmation.aspx?id=39358
2010 version that worked for me prior to the update that was automatically installed on my server on December 12th.
https://www.microsoft.com/en-us/download/confirmation.aspx?id=10910
https://www.microsoft.com/en-us/download/confirmation.aspx?id=10910
I also had this error occur last month in an automated process. The C# code ran fine when I ran it debugging. I found that the service account running the code also needed permissions to the C:\Windows\Temp folder.
Working with some older code and came across this same generic exception. Very hard to track down the issue, so I thought I'd add here in case it helps someone else.
In my case, there was code elsewhere in the project that was opening a StreamReader on the Excel file before the OleDbConnection tried to Open the file (this was done in a base class).
So basically I just needed to call Close() on the StreamReader object first, then I could open the OleDb Connection successfully. It had nothing to do with the Excel file itself, or with the OleDbConnection string (which is naturally where I was looking at first).
I've had this occur on a IIS website that I host, rarely but periodically this error will popup for files that I've previously parsed just fine. Simply restarting the applicable app pool seems to resolve the issue. Not quite sure why though...
This happened to us just recently. A customer of ours was getting this error when trying to upload their excel file on our website. I could open the xlsx file fine on ms excel and don't see any irregularities with the file. I've tried all mentioned solutions in here and none worked. And i found this link Treating data as text using Microsoft.ACE.OLEDB.12.0. What worked for our case is adding IMEX=1 attribute to the connection string. So if you are using Microsoft ACE OLEDB 12.0 this might help fix your issue. Hope this helps.
<add name="ExcelTextConnection" connectionString="Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties='Excel 12.0;HDR={1};IMEX=1'" />

Accessing MySQL via C# program - ERROR [IM002] Data source name not found and no default driver specified

I'm debugging an old C# program that was designed to take in .dbf files, connect to a database (for some reason*), and then output those .dbf files in a more human-friendly, formatted manner (an Excel file). A released version of this program (years ago) works fine, but has some things that need ironing out. Hence, my attempts to debug the available Visual Studio Solution.
I'm having trouble with the connect to a database part, as the program returns the above error.
I'm not at all too experienced with MySQL, but I'll try to give all the details I can.
The program is being debugged in Visual Studio 2005. It was probably created there too, although some things look outdated. My OS is Windows 7, 32-bit.
I'm using MySQL version 3.23.42, and is installed on the very computer where the program is running. No network setups here, since the Database likely stores temporary data, and then outputs it to the Excel file.
I'm not sure if this is correct (ODBC? Instead of SQL?), but this is at the top of the program:
using System;
using System.Data;
using System.Data.Odbc;
using System.Windows.Forms;
I also had the MyODBC 3.51.05 installed.
Here's the connection string (note: I did not write this, it was already there):
string str_connection="DRIVER={MySQL ODBC 5.1 Driver};SERVER="localhost";DATABASE="TKCinterface";UID="ids";PASSWORD="ids";OPTION=3";
The program fails when it tries to open a connection, which I assume has something to do with the connection string.
My attempts to manually connect via Tools -> Connect To Database was met with failure, or at least the options I chose.
Data source: Microsoft ODBC Data Source
Data provider: .NET Framework Data Provider for ODBC
I don't see the database in the Window that follows.
I can open up MySQL via the Command line, and also see the database (TKCInterface), so I'm not sure what the problem is.
Curiously, there is nothing that references MySQL in the References of the project. The whole thing builds fine, though.
Any help on this would be much appreciated. Thanks.
Regards,
Zack_Falcon
Specify the port with which you are connecting to mysql
change the connection sting to
string str_connection="DRIVER={MySQL ODBC 5.1 Driver};SERVER="localhost";DATABASE="TKCinterface";UID="ids";PASSWORD="ids";Port=3306;";
Hope this helps
You definately need mysql.data and mysql.data.entity in your reference list.
Download the libaries from here http://dev.mysql.com/downloads/connector/net/

the microsoft.ace.oledb.12.0 provider is not registered on the local machine

I have the following program in which i want to insert the values in MS-Access.I am getting the error "the microsoft.ace.oledb.12.0 provider is not registered on the local machine"
I have already installed the database engine as per suggestion of some developers, still i am getting the error.
I am writing the code on Vista machine with VS-2008 and MS-Access-2007.
Please help me to resolve the error
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
OleDbConnection con;
OleDbCommand cmd;
private void btnSubmit_Click(object sender, EventArgs e)
{
try
{
con = new OleDbConnection("Provider=Microsft.ACE.Oledb.12.0;Data Source=C:\\Users\\Satish\\Documents\\Testing.accdb");
con.Open();
string cmdText = "Insert Into UserDetail (UsrName,Age,Address,MobileNo) Values ('" + txtName.Text.ToString().Trim() + "','" + txtAge.Text.ToString().Trim() + "','" + txtAddress.Text.ToString().Trim() + "','" + txtMobile.Text.ToString().Trim() + "')";
cmd = new OleDbCommand(cmdText, con);
cmd.ExecuteNonQuery();
con.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
}
Try changing the advanced compile configuration to x86.
This is usually because you have a 64bit operating system.
in VS2008
Build -> Configuration Manager -> Active Solution Platform: -> New -> Type or select the new platform -> x86 - > OK
edit:
Try the following:
go to
C:\Windows\SysWOW64
open odbcad32.exe
if you cannot find excel in the list just click on Add and add it
You can register you assembly with RegSrv32
Because you use COM, and COM must be regsitered.
Link : http://msdn.microsoft.com/en-us/library/ms859484.aspx
RegSrv32 permit you to register your COM in register base (microsoft.ace.oledb.12.0 provider)
I have had this problem before when I have deployed an application on a User's machine that has Office 2003 installed rather than Office 2007. It sounds to me like the version of Office on your machine isn't installed correctly.
One possible work around is to change your Provider to a previous version like Microsoft.ace.oledb.4.0 and see if the same error persists.
The first thing you need to check is your build configuration of your application.
If you have built your project under x86 platform, then in order to
resolve you issue you should install the following packages on your
machine:
In order to use the 'Microsoft.ACE.OLEDB.12.0' provider you must
install the Microsoft Access Database Engine 2010 Redistributable
first, this installation is available at:
http://www.microsoft.com/download/en/details.aspx?id=13255 .
After the installation has complete, try running you application, if this
solves the issue great, if not, continue to step 2.
This next step is an unexplained workaround, which works for Office
2010, even though it is the Data Connectivity Components of Office 2007. I am not quite sure why this works, but it does and this has been proven to work in almost all cases. You need to install the 2007 Office System Driver: Data Connectivity Components, this installation is available at:
http://www.microsoft.com/download/en/confirmation.aspx?id=23734 .
After this installation is complete, try running your application, this should resolve the issue.
If you are trying to run an application built under x64 or AnyCPU
platform, I would recommend first validating that it runs as expected
under the x86 platform. In the event that it does not run under that
x86 platform, perform the steps in the first part and validate that
it runs as expected.
I did read that the MS Access drivers including the OLEDB Database
driver works only under the x86 platform and is incompatible under
the x64 or AnyCPU platform. But this appears to be untrue. I
validated my application was running when building x86, then I
installed the Access Database Engine using the passive flag.
First download the file locally You can download the installation
here: http://www.microsoft.com/en-us/download/details.aspx?id=13255
Installing using the command prompt with the '/passive' flag. In
the command prompt run the following command:
'AccessDatabaseEngine_x64.exe /passive'
After these 2 steps I managed to run my application after building in
x64 or AnyCPU build configuration. This appeared to solve my issue.
Note: The order of the steps seems to make a difference, so please follow accordingly.

How do I connect to different versions of Excel from C#?

I have a program that imports data from Excel into a dataset. To connect to Excel I use the following code...
return new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" +
fileName + "; Jet OLEDB:Engine Type=5;"+ "Extended Properties=\"Excel 8.0;\"");
I just got a new computer with Excel 2010 and now the connection attempt fails and throws an exception saying The 'Microsoft.Jet.OLEDB.4.0' provider is not registered on the local machine
Is this because the new version of Excel needs a different connection string? Has anyone run into this?
EDIT:
Actually I just read somewhere that using the System.Data.OleDbClient class does not require Excel to even be installed on the computer. So my problem probably has nothing to do with Excel but rather with the Microsoft.Jet tool. My computer is running Windows7 64 bit. Shouldn't that be installed already?
Check out the Microsoft Access Database Engine 2010 Redistributable.
Redistributables for other Excel versions also exist.
You need to compile your program specifically for 32-bit so it will run in the WoW subsystem and invoke the 32-bit Jet provider. As mentioned above, there is no 64-bit version of the Jet provider and likely never will be.
In Visual Studio, you do this by setting your target CPU type in the project settings to x86 instead of Any or 64-bit.
If you don't have the source for your program, you can modify the .exe using the corflags.exe utility that comes with the .NET framework and the /32bit+ flag, but if it's a strongly signed assembly you'll need the .SNK to re-sign it once you've modified it.
Here is a reference on WoW64 if you need more detail: http://en.wikipedia.org/wiki/WoW64
I find this site useful when having connection string questions.
http://www.connectionstrings.com/excel
Also take a look at a previous SO question:
Diagnosing an OLEDB exception when Quering Excel 2010

Excel "External table is not in the expected format."

I'm trying to read an Excel (xlsx) file using the code shown below. I get an "External table is not in the expected format." error unless I have the file already open in Excel. In other words, I have to open the file in Excel first before I can read if from my C# program. The xlsx file is on a share on our network. How can I read the file without having to open it first?
Thanks
string sql = "SELECT * FROM [Sheet1$]";
string excelConnection = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + pathname + ";Extended Properties=\"Excel 8.0;HDR=YES;IMEX=1;\"";
using (OleDbDataAdapter adaptor = new OleDbDataAdapter(sql, excelConnection)) {
DataSet ds = new DataSet();
adaptor.Fill(ds);
}
"External table is not in the expected format." typically occurs when trying to use an Excel 2007 file with a connection string that uses: Microsoft.Jet.OLEDB.4.0 and Extended Properties=Excel 8.0
Using the following connection string seems to fix most problems.
public static string path = #"C:\src\RedirectApplication\RedirectApplication\301s.xlsx";
public static string connStr = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties=Excel 12.0;";
Thanks for this code :) I really appreciate it. Works for me.
public static string connStr = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties=Excel 12.0;";
So if you have diff version of Excel file, get the file name, if its extension is .xlsx, use this:
Private Const connstring As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties=Excel 12.0;";
and if it is .xls, use:
Private Const connstring As String = "Provider=Microsoft.Jet.OLEDB.4.0;" & "Data Source=" + path + ";Extended Properties=""Excel 8.0;HDR=YES;"""
(I have too low reputation to comment, but this is comment on JoshCaba's entry, using the Ace-engine instead of Jet for Excel 2007)
If you don't have Ace installed/registered on your machine, you can get it at: https://www.microsoft.com/en-US/download/details.aspx?id=13255
It applies for Excel 2010 as well.
Just add my case. My xls file was created by a data export function from a website, the file extention is xls, it can be normally opened by MS Excel 2003. But both Microsoft.Jet.OLEDB.4.0 and Microsoft.ACE.OLEDB.12.0 got an "External table is not in the expected format" exception.
Finally, the problem is, just as the exception said, "it's not in the expected format". Though it's extention name is xls, but when I open it with a text editor, it is actually a well-formed html file, all data are in a <table>, each <tr> is a row and each <td> is a cell. Then I think I can parse it in a html way.
I had the same problem. which as resolved using these steps:
1.) Click File
2.) Select "save as"
3.) Click on drop down (Save as type)
4.) Select Excel 97-2003 Workbook
5.) Click on Save button
I had this same issue(Using the ACE.OLEDB) and what resolved it for me was this link:
http://support.microsoft.com/kb/2459087
The gist of it is that installing multiple office versions and various office sdk's, assemblies, etc. had led to the ACEOleDB.dll reference in the registry pointing to the OFFICE12 folder instead of OFFICE14 in
C:\Program Files\Common Files\Microsoft Shared\OFFICE14\ACEOLEDB.DLL
From the link:
Alternatively, you can modify the registry key changing the dll path to match that of your Access version.
Access 2007 should use OFFICE12, Access 2010 - OFFICE14 and Access
2013 - OFFICE15
(OS: 64bit Office: 64bit) or (OS: 32bit Office: 32bit)
Key: HKCR\CLSID{3BE786A0-0366-4F5C-9434-25CF162E475E}\InprocServer32\
Value Name: (Default)
Value Data: C:\Program Files\Common Files\Microsoft
Shared\OFFICE14\ACEOLEDB.DLL
(OS: 64bit Office: 32bit)
Key:
HKCR\Wow6432Node\CLSID{3BE786A0-0366-4F5C-9434-25CF162E475E}\InprocServer32\
Value Name: (Default)
Value Data: C:\Program Files (x86)\Common Files\Microsoft
Shared\OFFICE14\ACEOLEDB.DLL
I have also seen this error when trying to use complex INDIRECT() formulas on the sheet that is being imported. I noticed this because this was the only difference between two workbooks where one was importing and the other wasn't. Both were 2007+ .XLSX files, and the 12.0 engine was installed.
I confirmed this was the issue by:
Making a copy of the file (still had the issue, so it wasn't some save-as difference)
Selecting all cells in the sheet with the Indirect formulas
Pasting as Values only
and the error disappeared.
I was getting errors with third party and Oledb reading of a XLSX workbook.
The issue appears to be a hidden worksheet that causes a error. Unhiding the worksheet enabled the workbook to import.
If the file is read-only, just remove it and it should work again.
I know this is a very old post, but I can give my contribution too, on how I managed to resolve this issue.
I also use "Microsoft.ACE.OLEDB.12.0" as a Provider.
When my code tried to read the XLSX file, it received the error "External table is not in the expected format."
However, when I kept the file open in Excel and then the code tried to read it ... it worked.
SOLUTION:
I use Office 365 with company documents and in my case, the solution was very simple, I just needed to disable the sensitivity of the document, setting it to "public".
Detail: Even after saving as "public" the green check still remained marked in "Internal Use", but the problem remained solved after that.
I had this problem and changing Extended Properties to HTML Import fixed it as per this post by Marcus Miris:
strCon = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" & importedFilePathAndName _
& ";Extended Properties=""HTML Import;HDR=No;IMEX=1"";"
ACE has Superceded JET
Ace Supports all Previous versions of Office
This Code works well!
OleDbConnection MyConnection;
DataSet DtSet;
OleDbDataAdapter MyCommand;
MyConnection = new System.Data.OleDb.OleDbConnection(#"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=..\\Book.xlsx;Extended Properties=Excel 12.0;");
MyCommand = new System.Data.OleDb.OleDbDataAdapter("select * from [Sheet1$]", MyConnection);
DtSet = new System.Data.DataSet();
MyCommand.Fill(DtSet);
dataGridView1.DataSource = DtSet.Tables[0];
MyConnection.Close();
Ran into the same issue and found this thread. None of the suggestions above helped except for #Smith's comment to the accepted answer on Apr 17 '13.
The background of my issue is close enough to #zhiyazw's - basically trying to set an exported Excel file (SSRS in my case) as the data source in the dtsx package. All I did, after some tinkering around, was renaming the worksheet. It doesn't have to be lowercase as #Smith has suggested.
I suppose ACE OLEDB expects the Excel file to follow a certain XML structure but somehow Reporting Services is not aware of that.
the file might be locked by another process, you need to copy it then load it as it says in this post
This can also be a file that contains images or charts, see this: http://kb.tableausoftware.com/articles/knowledgebase/resolving-error-external-table-is-not-in-expected-format
The recommendation is to save as Excel 2003
Just adding my solution to this issue. I was uploading a .xlsx file to the webserver, then reading from it and bulk inserting to SQL Server. Was getting this same error message, tried all the suggested answers but none worked. Eventually I saved the file as excel 97-2003 (.xls) which worked... only issue I have now is that the original file had 110,000+ rows.
If you still have this problem, then check your permissions, I tried many of these suggestions and my concrete problem was that the file that I wanted to process was under source control and the thread had no permissions, I had to change the entire folder permissions and it started to work (I was processing many files in there)... It also matches many suggestions like change the name of the file or check that the file is not loicked by another process.
I hope it helps you.
Instead of OleDb, you could use the Excel Interop and open the worksheet as read-only.
https://msdn.microsoft.com/en-us/library/microsoft.office.interop.excel.workbooks.open(v=office.15).aspx
This can occur when the workbook is password-protected. There are some workarounds to remove this protection but most of the examples you'll find online are outdated. Either way, the simple solution is to unprotect the workbook manually, otherwise use something like OpenXML to remove the protection programmatically.
I recently saw this error in a context that didn't match any of the previously listed answers. It turned out to be a conflict with AutoVer. Workaround: temporarily disable AutoVer.
That excel file address may have an incorrect extension. You can change the extension from xls to xlsx or vice versa and try again.
I recently had this "System.Data.OleDb.OleDbException (0x80004005): External table is not in the expected format." error occur. I was relying on Microsoft Access 2010 Runtime. Prior to the update that was automatically installed on my server on December 12th 2018 my C# code ran fine using Microsoft.ACE.OLEDB.12.0 provider. After the update from December 12th 2018 was installed I started to get the “External table is not in the expected format" in my log file.
I ditched the Microsoft Access 2010 Runtime and installed the Microsoft Access 2013 Runtime and my C# code started to work again with no "System.Data.OleDb.OleDbException (0x80004005): External table is not in the expected format." errors.
2013 version that fixed this error for me
https://www.microsoft.com/en-us/download/confirmation.aspx?id=39358
2010 version that worked for me prior to the update that was automatically installed on my server on December 12th.
https://www.microsoft.com/en-us/download/confirmation.aspx?id=10910
https://www.microsoft.com/en-us/download/confirmation.aspx?id=10910
I also had this error occur last month in an automated process. The C# code ran fine when I ran it debugging. I found that the service account running the code also needed permissions to the C:\Windows\Temp folder.
Working with some older code and came across this same generic exception. Very hard to track down the issue, so I thought I'd add here in case it helps someone else.
In my case, there was code elsewhere in the project that was opening a StreamReader on the Excel file before the OleDbConnection tried to Open the file (this was done in a base class).
So basically I just needed to call Close() on the StreamReader object first, then I could open the OleDb Connection successfully. It had nothing to do with the Excel file itself, or with the OleDbConnection string (which is naturally where I was looking at first).
I've had this occur on a IIS website that I host, rarely but periodically this error will popup for files that I've previously parsed just fine. Simply restarting the applicable app pool seems to resolve the issue. Not quite sure why though...
This happened to us just recently. A customer of ours was getting this error when trying to upload their excel file on our website. I could open the xlsx file fine on ms excel and don't see any irregularities with the file. I've tried all mentioned solutions in here and none worked. And i found this link Treating data as text using Microsoft.ACE.OLEDB.12.0. What worked for our case is adding IMEX=1 attribute to the connection string. So if you are using Microsoft ACE OLEDB 12.0 this might help fix your issue. Hope this helps.
<add name="ExcelTextConnection" connectionString="Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties='Excel 12.0;HDR={1};IMEX=1'" />

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