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ExportToExcel does not returns anything/does not work

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Grid

This is a migrated thread and some comments may be shown as answers.

Miguel asked on 19 Apr 2017, 09:59 PM

While I read many posts about this issue, none seem to fit my particular problem.

I have a very simple web form, with a grid, which is not ajaxified, in server side code, I call a complex object that returns a simple list of items as a datatable and set it as datasource for my grid. The grids works and displays all OK, however when I try to export to xlsx (and actually any supported format), nothing happens after calling MasterTableView.ExportToExcel().

I did verified that the grdWarranties items is not empty and that the datasource is not lost. Below substract of the web page and the server side code to execute the export:

Protected Sub btnExport_Click(sender As Object, e As Telerik.Web.UI.ImageButtonClickEventArgs) Handles btnExport.Click

grdWarranties.Page.Response.ClearHeaders()

grdWarranties.Page.Response.Cache.SetCacheability(HttpCacheability.Private)

grdWarranties.ExportSettings.Excel.Format = Telerik.Web.UI.GridExcelExportFormat.Xlsx

grdWarranties.ExportSettings.IgnorePaging = False

grdWarranties.ExportSettings.ExportOnlyData = True

grdWarranties.ExportSettings.OpenInNewWindow = True

grdWarranties.MasterTableView.ExportToExcel()

End Sub

<asp:Panel runat="server">

<table class="WarrantyCheckTable" style="margin-top:15px">

<tr>

<td style="width:15%">

<telerik:RadLabel ID="RadLabel1" Text="Type or paste in your Landis+Gyr serial numbers:" runat="server" Font-Size="Small" Font-Italic="True"></telerik:RadLabel>

<telerik:RadTextBox ID="txtMSNs" runat="server" TextMode="MultiLine" BorderColor="#7AB800" BorderWidth="1px" Height="93%" Width="100%" Wrap="False" ></telerik:RadTextBox>

</td>

<td style="width:5%">

<telerik:RadImageButton ID="btnGo" runat="server" Text="Go!" Skin="Telerik"></telerik:RadImageButton>

</td>

<td >

<telerik:RadGrid ID="grdWarranties" runat="server" AllowSorting="True" AutoGenerateColumns="False" ShowGroupPanel="True" Width="100%" ViewStateMode="Enabled" RenderMode="Lightweight" >

<GroupingSettings CollapseAllTooltip="Collapse all groups" />

<ExportSettings ExportOnlyData="True" FileName="WarrantyData" OpenInNewWindow="True">

<Excel FileExtension="xlsx" Format="Xlsx" />

<Csv EncloseDataWithQuotes="False" />

</ExportSettings>

<ClientSettings AllowDragToGroup="True">

<Scrolling AllowScroll="True" ScrollHeight="600px" UseStaticHeaders="True" />

</ClientSettings>

<MasterTableView>

<Columns>

<telerik:GridBoundColumn DataField="MSN" FilterControlAltText="Filter colMSN column" HeaderText="MSN" UniqueName="colMSN">

<FooterStyle HorizontalAlign="Center" />