Question

I am getting this error when trying to update excel sheet :

Server Error in '/ReadExcelData_Csharp' Application.
Operation must use an updateable query. 

and here is the code that i am using :

  querys = "UPDATE [Sheet1$] "+"SET [Number]=" +s.Trim()+ " WHERE [Number]=" + s2.Trim() ;
  objcmc = new OleDbCommand(querys, conn);
  objcmc.ExecuteNonQuery();

any help will be appreciated .

and here is the connection i used :

if (strFileType.Trim() == ".xls")
            {
                connString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + strNewPath + ";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=2\"";
            }
            else if (strFileType.Trim() == ".xlsx")
            {
                connString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + strNewPath + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=2\"";
            }

Answer 1

Remove the IMEX=2 (or IMEX=1) from the connection string and it will work. I have tested this crazy solution several times and removing the IMEX for some strange reason seems to do the trick (at least for xlsx files).

The following code works:

    static void Main(string[] args)
    {
        string connectionString  = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + "d:\\temp\\customers.xlsx" + ";Extended Properties=\"Excel 12.0;ReadOnly=False;HDR=Yes;\"";
        string selectString = "INSERT INTO [Customers$](Id,Company) VALUES('12345', 'Acme Inc')";

        OleDbConnection con = new OleDbConnection(connectionString);
        OleDbCommand cmd = new OleDbCommand(selectString, con);

        try
        {
            con.Open();
            cmd.ExecuteNonQuery();
            Console.WriteLine("Success");
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
        }
        finally
        {
            con.Dispose();
        }
        Console.ReadLine();
    }
}

Thanks to RobertNet from social.msdn.microsoft.com