How to view Excel file directly from 4.0?

I just want to view Excel file directly from 4.0 with C#.

Here is my code :

protected void lbut_viewfile_Click(object sender, EventArgs e)
    Microsoft.Office.Interop.Excel.Workbook theWorkbook = 
             openFileDialog1.FileName, 0, true, 5, "", "", true,     
             Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "\t", 
             false, false, 0, true);

    Microsoft.Office.Interop.Excel.Sheets sheets = theWorkbook.Worksheets;

    Microsoft.Office.Interop.Excel.Worksheet worksheet = 

    for (int i = 1; i <= 10; i++)
        Microsoft.Office.Interop.Excel.Range range = 
             worksheet.get_Range("A" + i.ToString(), "J" + i.ToString());
        System.Array myvalues = (System.Array)range.Cells.Value;
        string[] strArray = ConvertToStringArray(myvalues);


Here I can not get this ExcelObj.Workbooks.Open, openFileDialog1 and ConvertToStringArray I want which specific refrences it diserve.


You can't combine ASP.NET and Office together. This is strongly discouraged by Microsoft. Also you are combining Windows controls, which will run on the server and will never work on the client.

If you want to show the Excel file in the browser, I suggest to either let the user download the file and show it in it's default program, or read the file using EpPlus and create the output HTML yourself.

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