Home/ Questions/Q 6390561
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-25T03:33:43+00:00

I have a connection string to read an excel file from my C# project

  • 0

I have a connection string to read an excel file from my C# project that looks like this..

String ConnectionString  = "Provider=Microsoft.ACE.OLEDB.12.0;" +
                                      "Data Source=" + VariableFile + ";" +
                                      "Extended Properties=Excel 8.0;";

and I also have objConn.Open(); to open the file..

The problem is the only time my program will open the file is if I open the Excel file manually and run my program. Can anyone help me to open the file from my C# code instead of having to open it first manually. I get the error message: Could not find installable ISAM when I try to run it without opening the Excel file first.

Thank you

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    I think your connection string is formatted wrong and the “Could not find installable ISAM” is usually an indication of this.

    Try this, it’s from a piece of operational code I have:

    Excel 2007

    string connectionString = string.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=\"Excel 12.0 Xml;HDR=No;IMEX=1\";", fullPath);

    Excel 2003

    string connectionString = string.Format("Provider=Microsoft.Jet.OLEDB.4.0; data source={0}; Extended Properties=\"Excel 8.0;HDR=No;IMEX=1\";", fullPath);
    • 0