I set the datasource and databind. I can see all the data rows within the webdatagrid, just not in the export...

Ah that did the trick. Really appreciate your help!

But do you execute the data binding logic on each page load or only if it is NOT PostBack?

If so, you should assign the data source before exporting:

protected void btn_excelExport_Click(object sender, EventArgs e) {

      SqlDataSource sDC = new SqlDataSource(connectionString, selQuery);
      WebDataGrid1.DataSource = sDC;
      string excelExportName = "IRT_ETL_Data_" + txt_AppID.Text;
      WebExcelExporter1.DownloadName = excelExportName;
     
      WebExcelExporter1.Export(WebDataGrid1);
    }

Sure,

• Here is the databinding

SqlDataSource sDC = new SqlDataSource(connectionString, selQuery);
WebDataGrid1.Visible = true;
WebDataGrid1.DataSource = sDC;
WebDataGrid1.DataBind();

• Here is my button to do the export

protected void btn_excelExport_Click(object sender, EventArgs e) {
      string excelExportName = "IRT_ETL_Data_" + txt_AppID.Text;
      WebExcelExporter1.DownloadName = excelExportName;
     
      WebExcelExporter1.Export(WebDataGrid1);
    }

• Lastly, here is the codefor the Exporter

<ig:WebExcelExporter ID="WebExcelExporter1" runat="server"
      DataExportMode="AllDataInDataSource">
    </ig:WebExcelExporter>

Can you paste your code-behind here?