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Exception on Open in OleDbConnection

When I am trying to open a excel into one of my windows service using following code it is throwing "Value cannot be null. Parameter name: source" on objConn.Open(); Can any one please help me.
OleDbConnection objConn = null;
System.Data.DataTable dt = null;
LogManager LogWrite = new LogManager();
try
{
string conn = #"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Repository\RuleExcel\Rules_Repository_2018-06-28_03-41-29-133.xlsx;Extended Properties='Excel 12.0;HDR=YES;';";
LogWrite.WriteLog(conn);
// Create connection object by using the preceding connection string.
objConn = new OleDbConnection(conn);
LogWrite.WriteLog(objConn.DataSource);
// Open connection with the database.
objConn.Open();

try this below code, it works for me :
using (OleDbConnection objConn = new OleDbConnection(#"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + FileName + #";Extended Properties=""Excel 12.0;IMEX=1;HDR=YES;"""))
{
objConn.Open();
}

The Microsoft Access database engine could not find the object 'Sheet1$

I am copying the template excel file saved in the server folder in to the same folder with different name. to insert the value..I am able to copy the file but when I try to insert the values it shows sheet!$ could not found. I have given correct sheet name..Only one sheet is added in the spread sheet named as sheet1.still it shows error .My code is given below.Nay idea about this error .I googled but asked me to check the folder and sheet name..it is correct only..please help me
string xxx = "~/temp/" + "Tempfile" + dunsno + DateTime.Today.ToString("dd.MM.yyyy") + ".xlsx";
DirectoryInfo directoryInfo = new DirectoryInfo(Server.MapPath("~/temp/"));
var fileList = directoryInfo.GetFiles();
string newFileName = Server.MapPath("~/temp/" + "Tempfile" + dunsno + DateTime.Today.ToString("dd.MM.yyyy") + ".xlsx");
foreach (FileInfo fleInfo in fileList
{
fleInfo.CopyTo(newFileName, true);
}
string connStr = String.Format(#"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=xxx;Extended Properties=""Excel 12.0 Xml;HDR=YES""");
OleDbConnection MyConnection;
OleDbCommand MyCommand = new OleDbCommand();
MyConnection = new OleDbConnection(#connStr);
MyConnection.Open();
MyCommand.Connection = MyConnection;
string sql = "Insert into [Sheet1$] (id,name) values('3','c')";
MyCommand.CommandText = sql;
MyCommand.ExecuteNonQuery();
MyConnection.Close();

Replace:
string connStr = String.Format(#"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=xxx;Extended Properties=""Excel 12.0 Xml;HDR=YES""");
with
string connStr = String.Format(#"Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=""Excel 12.0 Xml;HDR=YES""", newFileName);

In case if you are still getting error as follows "The Microsoft Access database engine could not find the object..." followed by the sheet name from where you are trying to read data then try [sheetname$].

OleDBException when reading an open excel file

I have an excel file and an oledb connection to it. When reading data while file is opened in windows, it throws the following error (at Adapter.Fill method).
However, the code runs fine when file is not opened manually.
private System.Data.DataSet GetExcelData()
{
// Create new DataSet to hold information from the worksheet.
System.Data.DataSet objDataset1 = new System.Data.DataSet();
DataTable dt = new DataTable();
try
{
string path = ConfigurationManager.AppSettings["ExcelFilePath"];
//string connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties=Excel 12.0;";
string connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties=\"Excel 12.0 Xml;HDR=YES;IMEX=1;\"";
OleDbConnection objConn = new OleDbConnection(connectionString);
objConn.Open();
//String strConString = "SELECT * FROM [Data Version5.2$A2:ZZ] where [Status] = 'aa'";//Status
String strConString = "SELECT * FROM [Data Version5.2$A2:ZZ] where [Status] IS NULL OR [Status]='SubReport'";//Status SubReport
OleDbCommand objCmdSelect = new OleDbCommand(strConString, objConn);
OleDbDataAdapter objAdapter1 = new OleDbDataAdapter();
// Pass the Select command to the adapter.
objAdapter1.SelectCommand = objCmdSelect;
// Fill the DataSet with the information from the work sheet.
objAdapter1.Fill(objDataset1, "ExcelData");
objConn.Close();
}
catch (Exception ex)
{
throw ex;
}
return objDataset1;
}
The error message is

Assuming you don't need to write to the file, try adjusting your connection string to include the read only mode (Mode=Read). I have that in all of mine (where I don't need to write to the file) and I've never had a problem reading from workbooks that are already open:
string connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" +
path + ";Mode=Read;Extended Properties=\"Excel 12.0 Xml;HDR=YES;IMEX=1;\"";
I also don't tend to read Excel files as XML, so the Extended Properties for my connection strings are Excel 12.0;HDR=YES;IMEX=1;

update excel cells with its uppercase text

i have the following problem with an excel file that i want to uppercase the values of its respective cells in C# with the next code:
DbProviderFactory factory =
DbProviderFactories.GetFactory("System.Data.OleDb");
DbConnection connection = factory.CreateConnection();
string stringConnection = String.Format(#"Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties='Excel 8.0;HDR=NO;IMEX=1'",
excelPath);
connection.ConnectionString = stringConnection;
connection.Open();
DbCommand updateExcel =
factory.CreateCommand();
updateExcel.CommandText =
"UPDATE [sheet1$] SET lastname = UCASE(lastname), name = ucase(name)";
updateExcel.Connection = connection;
updateExcel.ExecuteNonQuery();
conection.Close();
connection.Dispose();
and it raise an oledbexception about parameters doesnt specified, anybody could help me?

If you are trying to connect to an Excel 2007 or 2010 spreadsheet you will need the following connection string...
OleDbConnection xlconnection = new OleDbConnection();
xlconnection.ConnectionString = #"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + FileName + #";Extended Properties='Excel 12.0;HDR=YES;IMEX=1'"

Unable to Open an Excel file using System.Data.OleDb.OleDbConnection [duplicate]

This question already has answers here:
Excel "External table is not in the expected format."
(25 answers)
Closed 8 years ago.
Iam trying to open an XLSX file (so that I can create a datatable )
Iam using the the below code.
System.Data.OleDb.OleDbConnection oleDbCon;
System.Data.OleDb.OleDbDataAdapter oleDbDataAd;
oleDbCon = new System.Data.OleDb.OleDbConnection("provider=Microsoft.Jet.OLEDB.4.0;Data Source='" + filePath + "';Extended Properties=Excel 8.0;");
but when file path contains a file with extension xlsx , i get an error
"External table is not in the expected format."
Above code works fine when file is of extention xls.
Do I have to change the connection string ?
Any help ?Thanks in Advance.

Changed the connection string to
public static string connStr = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source="
+ path + ";Extended Properties=Excel 12.0;";

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

.xlsx has different connectionstrings

string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" +"Data Source="
+ Path +";"+"Extended Properties=Excel 8.0;";
OleDbConnection conn = new OleDbConnection(strConn);
conn.Open();
string strExcel = "";
OleDbDataAdapter myCommand = null;
DataSet ds = null;
strExcel="select * from [sheet1$]";
myCommand = new OleDbDataAdapter(strExcel, strConn);
ds = new DataSet();
myCommand.Fill(ds,"table1");
return ds;