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Problems reading all the lines of an excel with OLEDB and C#

I am developing a program to import excel spreadsheets with C # language, using the OLEDB component, when importing a spreadsheet with 100547 rows the program can only read 54046.
Follows the source code:
public class ReadExcel
{
public string ConnectionExcel(ExcelUpload excelUpload)
{
//connection String for xls file format.
if (excelUpload.fileExtension == ".xls")
{
excelUpload.excelConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + excelUpload.fileLocation + ";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=2\"";
}
//connection String for xlsx file format.
else if (excelUpload.fileExtension == ".xlsx")
{
excelUpload.excelConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + excelUpload.fileLocation + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=2\"";
}else
{
excelUpload.excelConnectionString = "";
}
return excelUpload.excelConnectionString;
}
public DataTable readArqExcel(string excelConnectionString, DataSet ds)
{
//Create Connection to Excel work book and add oledb namespace
OleDbConnection excelConnection = new OleDbConnection(excelConnectionString);
excelConnection.Open();
DataTable dt = new DataTable();
dt = excelConnection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
if (dt == null)
{
return null;
}
//Numero de planilhas contidas no excel
String[] excelSheets = new String[dt.Rows.Count];
int count = 0;
//excel data saves in temp file here.
foreach (DataRow row in dt.Rows)
{
excelSheets[count] = row["TABLE_NAME"].ToString();
count++;
}
OleDbConnection excelConnection1 = new OleDbConnection(excelConnectionString);
string query = string.Format("Select * from [{0}]", excelSheets[0]);
using (OleDbDataAdapter dataAdapter = new OleDbDataAdapter(query, excelConnection1))
{
dataAdapter.Fill(ds);
}
excelConnection.Close();
return ds.Tables[0];
}
I have tested IIS 8 (REMOTE SERVER) and IIS Express (Visual Studio local server), I noticed that on the IIS Express server the code works perfectly, but in IIS 8 the code ends up reading the file in half.
Is it some kind of web server configuration?

problem resolved, i altered string of connection OLEBD with MsExcel.
Alter parameter IMEX = 2 for IMEX = 1, as below
if (excelUpload.fileExtension == ".xls")
{
excelUpload.excelConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + excelUpload.fileLocation + ";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=1\"";
}
//connection String for xlsx file format.
else if (excelUpload.fileExtension == ".xlsx")
{
excelUpload.excelConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + excelUpload.fileLocation + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=1\"";
}

Arabic letter data save to database as "?"

I'm uploading data to DB table using excel sheet
I'm uploading data to ProductStatisticsTemp table
In that table I have following columns
Product_ID
ProductNameEn
ProductNameAr
this the upload data POST method
[HttpPost]
public ActionResult FileUpload(HttpPostedFileBase file)
{
if (Request.Files["file"].ContentLength > 0)
{
string fileExtension = System.IO.Path.GetExtension(Request.Files["file"].FileName);
if (fileExtension == ".xls" || fileExtension == ".xlsx")
{
string fileLocation = Server.MapPath("~/Content/ExcelFiles/") + Request.Files["file"].FileName;
if (System.IO.File.Exists(fileLocation))
{
System.IO.File.Delete(fileLocation);
}
Request.Files["file"].SaveAs(fileLocation);
string excelConnectionString = string.Empty;
excelConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + fileLocation + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=2\"";
//connection String for xls file format.
if (fileExtension == ".xls")
{
excelConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + fileLocation + ";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=2\"";
}
//connection String for xlsx file format.
else if (fileExtension == ".xlsx")
{
excelConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + fileLocation + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=2\"";
}
//Create Connection to Excel work book and add oledb namespace
OleDbConnection excelConnection = new OleDbConnection(excelConnectionString);
excelConnection.Open();
DataTable dt = new DataTable();
dt = excelConnection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
if (dt == null)
{
return null;
}
String[] excelSheets = new String[dt.Rows.Count];
int t = 0;
//excel data saves in temp file here.
foreach (DataRow row in dt.Rows)
{
excelSheets[t] = row["TABLE_NAME"].ToString();
t++;
}
OleDbConnection excelConnection1 = new OleDbConnection(excelConnectionString);
string query = string.Format("Select * from [{0}]", excelSheets[0]);
using (OleDbDataAdapter dataAdapter = new OleDbDataAdapter(query, excelConnection1))
{
dataAdapter.Fill(ds);
}
}
if (fileExtension.ToString().ToLower().Equals(".xml"))
{
string fileLocation = Server.MapPath("~/Content/ExcelFiles") + Request.Files["FileUpload"].FileName;
if (System.IO.File.Exists(fileLocation))
{
System.IO.File.Delete(fileLocation);
}
Request.Files["FileUpload"].SaveAs(fileLocation);
XmlTextReader xmlreader = new XmlTextReader(fileLocation);
// DataSet ds = new DataSet();
ds.ReadXml(xmlreader);
xmlreader.Close();
}
for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
{
string conn = ConfigurationManager.ConnectionStrings["dbconnection"].ConnectionString;
SqlConnection con = new SqlConnection(conn);
string query = "Insert into ProductStatisticsTemp(Product_ID,ProductNameEn,ProductNameAr) Values('" + ds.Tables[0].Rows[i][0] + "','" + ds.Tables[0].Rows[i][1] + "','" + ds.Tables[0].Rows[i][2] )";
con.Open();
SqlCommand cmd = new SqlCommand(query, con);
cmd.ExecuteNonQuery();
con.Close();
}
}
return RedirectToAction("FileUpload", "FileUpload");
}
But in here data saving smoothly , but ProductNameAr fields Arabic letters values save as "?"
ex: If excel value حساب التوفير للاستثمار Albrka
then its saving in database table as ???? ??????? ????????? Albrka
How to save as exact format in the excel sheet
ps. this ProductNameAr data type in Database table is NVARCHAR

You use non-Unicode string literals 'value' when you should use Unicode literals in the form N'value'
You better rewrite as parameterized SqlCommand passing the values using AddWithValue
string query = "Insert into ProductStatisticsTemp(Product_ID,ProductNameEn,ProductNameAr) Values(#Product_ID,#ProductNameEn,#ProductNameAr)";
SqlCommand cmd = new SqlCommand(query, con);
cmd.Parameters.AddWithValue("#Product_ID", ds.Tables[0].Rows[i][0]);
...etc...
You don't need to re-create and open the SqlConnection inside the loop

c# OleDbDataAdapter excel missing last row

GetExcelSheetNames:
static String[] GetExcelSheetNames(string excelFile, string extention)
{
OleDbConnection objConn = null;
System.Data.DataTable dt = null;
string filepath= excelFile;// +; excelFile;
string Conn = "";
if (extention == "xls")
Conn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filepath+ ";Extended Properties=Excel 8.0;";
else Conn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filepath+ ";Extended Properties=Excel 12.0";
try
{
// Connection String. Change the excel file to the file you
// will search.
// Create connection object by using the preceding connection string.
objConn = new OleDbConnection(Conn);
// Open connection with the database.
objConn.Open();
// Get the data table containg the schema guid.
dt = objConn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
if (dt == null)
{
return null;
}
String[] excelSheets = new String[dt.Rows.Count];
int i = 0;
// Add the sheet name to the string array.
foreach (DataRow row in dt.Rows)
{
excelSheets[i] = row["TABLE_NAME"].ToString();
i++;
}
return excelSheets;
}
catch (Exception ex)
{
return null;
}
finally
{
// Clean up.
if (objConn != null)
{
objConn.Close();
objConn.Dispose();
}
if (dt != null)
{
dt.Dispose();
}
}
}
GetTable:
private DataSet GetTable(string filepath, string extention)
{
string strConn;
if (extention == "xls")
{
strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filepath + ";Extended Properties=Excel 8.0;";
}
else
{
strConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filepath + ";Extended Properties=Excel 12.0";
}
DataSet myDataSet = new DataSet();
OleDbDataAdapter myCommand = new OleDbDataAdapter("SELECT * FROM [" + GetExcelSheetNames(filepath, extention)[0] + "]", strConn);
myCommand.Fill(myDataSet, "ExcelInfo");
if (myDataSet.Tables[0].Rows.Count > 0)
{
return myDataSet;
}
else return null;
}
I export excel data to datatable by using OleDbDataAdapter.
My both method (above side) works however last row is missing .
Where i miss exactly how can i get all rows from excel ?
Any help will be appreciated.
Thanks.

How to import the same Excel file into SQL Server

I had created an asp.net mvc4 application and I deployed it to the web.
In this application I have a controller to import some Excel file into the database.
On my localhost it's working fine, but on the server when I try to import a file that has the same name as an existing file it gives me an error
(I can't see the exception I see just some nice message (catch .....)
This is a part of code :
if (Request.Files["file"].ContentLength > 0)
{
string fileExtension = System.IO.Path.GetExtension(Request.Files["file"].FileName);
if (fileExtension == ".xls" || fileExtension == ".xlsx")
{
string fileLocation = Server.MapPath("~/Content/") + Request.Files["file"].FileName;
if (System.IO.File.Exists(fileLocation))
{
System.IO.File.Delete(fileLocation);
}
Request.Files["file"].SaveAs(fileLocation);
string excelConnectionString = string.Empty;
excelConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" +
fileLocation + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=2\"";
//connection String for xls file format.
if (fileExtension == ".xls")
{
excelConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" +
fileLocation + ";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=2\"";
}
//connection String for xlsx file format.
else if (fileExtension == ".xlsx")
{
excelConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" +
fileLocation + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=2\"";
}
//Create Connection to Excel work book and add oledb namespace
OleDbConnection excelConnection = new OleDbConnection(excelConnectionString);
excelConnection.Open();
DataTable dt = new DataTable();
dt = excelConnection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
if (dt == null)
{
return null;
}
String[] excelSheets = new String[dt.Rows.Count];
int t = 0;
//excel data saves in temp file here.
foreach (DataRow row in dt.Rows)
{
excelSheets[t] = row["TABLE_NAME"].ToString();
t++;
}
OleDbConnection excelConnection1 = new OleDbConnection(excelConnectionString);
string query = string.Format("Select * from [{0}]", excelSheets[0]);
using (OleDbDataAdapter dataAdapter = new OleDbDataAdapter(query, excelConnection1))
{
dataAdapter.Fill(ds);
}
excelConnection.Close();
}
if (fileExtension.ToString().ToLower().Equals(".xml"))
{
string fileLocation = Server.MapPath("~/Content/") + Request.Files["FileUpload"].FileName;
if (System.IO.File.Exists(fileLocation))
{
System.IO.File.Delete(fileLocation);
}
Request.Files["FileUpload"].SaveAs(fileLocation);
XmlTextReader xmlreader = new XmlTextReader(fileLocation);
ds.ReadXml(xmlreader);
xmlreader.Close();
}
}

My answer comes without knowledge of the specific exception (as you mentioned, you can't see the exception yourself). In my similar experience, I've run across the same problem, and it was resolved by installing the Microsoft ACE OLEDB 12.0 driver on the server. I've installed the following component to resolve the problem:
2007 Office System Driver - Data Connectivity Components:
http://www.microsoft.com/en-us/download/details.aspx?id=23734
If that doesn't help, more information regarding the exception you're seeing would be helpful in solving the problem.

How to fetch a excel file from a folder?

I'm having a excel file in a folder. but i dont know to fetch that file from the folder.
but I'm checking whether the file exists.
here is my code:
protected void Page_Load(object sender, EventArgs e)
{
string filePath = Server.MapPath("~/Upload/Sample.xlsx");
bool fileexists = File.Exists(filePath); //Here fileexists = true
}
I need to save that excel file in sql database.
I need to save the fileName(varchar(256)),Data(varbinary(max)),Path(varchar(256)) of that excel file into sql database.
please help me out

Try this to get and read an xlsx file .
if (Directory.Exists(Server.MapPath("path")))
{
string filename = Path.GetFileName("path");// to get filename
string conStr = string.Empty;
string extension = Path.GetExtension(filename);// get extension
if (extension == ".xls" || extension == ".xlsx")
{
switch (extension)
{
case ".xls": //Excel 1997-2003
conStr = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source='" + mappingPath + "';" + "Extended Properties=Excel 8.0;";
break;
case ".xlsx": //Excel 2007
conStr = "Provider=Microsoft.ACE.OLEDB.12.0;" + "Data Source='" + mappingPath + "';" + "Extended Properties=Excel 8.0;";
break;
default:
break;
}
OleDbConnection connExcel = new OleDbConnection(conStr.ToString());
OleDbCommand cmdExcel = new OleDbCommand();
OleDbDataAdapter oda = new OleDbDataAdapter();
connExcel.Open();
DataTable dtExcelSchema;
dtExcelSchema = connExcel.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
string SheetName = dtExcelSchema.Rows[0]["TABLE_NAME"].ToString();
ViewState["SheetName"] = SheetName;
//Selecting Values from the first sheet
//Sheet name must be as Sheet1
OleDbDataAdapter da = new OleDbDataAdapter("SELECT * From [" + SheetName + "]", conStr.ToString()); // to fetch data from excel
da.Fill(dtExcel);
}

This is much simpler than you think, it should be something like:
if (File.Exists(filePath)) {
byte[] data = File.ReadAllBytes(filePath);
string fileName = Path.GetFileName(filePath);
const string query = "INSERT INTO Files (FileName, Data, Path) VALUES (#FileName, #Data, #Path)";
using (var connection = new SqlConnection(connectionString))
using (var command = new SqlCommand(query, connection)) {
command.Parameters.AddWithValue("#FileName", fileName);
command.Parameters.AddWithValue("#Data", data);
command.Parameters.AddWithValue("#Path", filePath);
connection.Open();
command.ExecuteNonQuery();
}
}