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Download a file from link button in grid

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Grid

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

Jerald asked on 16 Nov 2016, 09:59 PM

I have read several posts about how to do this. I have also reviewed the documentation but I still can't get it figured out. I have a grid with a template column containing a link button:

<telerik:RadGrid

ID="rg_ven_docs"

runat="server"

DataSourceID="sdc_rg_ven_docs"

AutoGenerateColumns="False"

AllowPaging="True"

AllowSorting="True"

AllowFilteringByColumn="True"

ShowGroupPanel="True"

Skin="Office2010Blue"

ClientSettings-EnablePostBackOnRowClick="True"

CellSpacing="-1"

GridLines="Both"

OnSelectedIndexChanged="rg_ven_docs_SelectedIndexChanged"

OnPreRender="rg_ven_docs_PreRender"

OnItemCommand="rg_ven_docs_ItemCommand"

EnableViewState="true"

PageSize="5">

<ClientSettings

AllowDragToGroup="True"

AllowColumnsReorder="True"

ReorderColumnsOnClient="True">

</ClientSettings>

<MasterTableView DataSourceID="sdc_rg_ven_docs" DataKeyNames="docIdPk" ShowHeadersWhenNoRecords="true" CommandItemDisplay="Top" CommandItemSettings-ShowAddNewRecordButton="false" CommandItemSettings-ShowRefreshButton="true" >

<Columns>

<telerik:GridButtonColumn Text="Select" CommandName="Select" ButtonType="LinkButton"></telerik:GridButtonColumn>

<telerik:GridBoundColumn DataField="docIdPk" ReadOnly="True" HeaderText="docIdPk" SortExpression="docIdPk" UniqueName="docIdPk" DataType="System.Int32" FilterControlAltText="Filter docIdPk column"></telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="venDocTitle" HeaderText="Title" SortExpression="venDocTitle" UniqueName="venDocTitle" FilterControlAltText="Filter venDocTitle column" HeaderStyle-HorizontalAlign="Center" ItemStyle-HorizontalAlign="Center" HeaderStyle-Font-Bold="true"></telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="docType" HeaderText="Document Type" SortExpression="docType" UniqueName="docType" FilterControlAltText="Filter docType column" HeaderStyle-HorizontalAlign="Center" ItemStyle-HorizontalAlign="Center" HeaderStyle-Font-Bold="true"></telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="contType" HeaderText="Contract Type" SortExpression="contType" UniqueName="contType" FilterControlAltText="Filter contType column" HeaderStyle-HorizontalAlign="Center" ItemStyle-HorizontalAlign="Center" HeaderStyle-Font-Bold="true"></telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="org" HeaderText="Organization" SortExpression="org" UniqueName="org" FilterControlAltText="Filter org column" HeaderStyle-HorizontalAlign="Center" ItemStyle-HorizontalAlign="Center" HeaderStyle-Font-Bold="true"></telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="dept" HeaderText="Department" SortExpression="dept" UniqueName="dept" FilterControlAltText="Filter dept column" HeaderStyle-HorizontalAlign="Center" ItemStyle-HorizontalAlign="Center" HeaderStyle-Font-Bold="true"></telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="PriorContCd" HeaderText="Prior Contract Code" SortExpression="PriorContCd" UniqueName="PriorContCd" FilterControlAltText="Filter PriorContCd column" HeaderStyle-HorizontalAlign="Center" ItemStyle-HorizontalAlign="Center" HeaderStyle-Font-Bold="true"></telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="stat" HeaderText="Status" SortExpression="stat" UniqueName="stat" FilterControlAltText="Filter stat column" HeaderStyle-HorizontalAlign="Center" ItemStyle-HorizontalAlign="Center" HeaderStyle-Font-Bold="true"></telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="crntDocStatDtSet" ReadOnly="True" HeaderText="Status Date" SortExpression="crntDocStatDtSet" UniqueName="crntDocStatDtSet" DataType="System.DateTime" FilterControlAltText="Filter crntDocStatDtSet column" HeaderStyle-HorizontalAlign="Center" ItemStyle-HorizontalAlign="Center" HeaderStyle-Font-Bold="true"></telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="venIdFk" HeaderText="venIdFk" SortExpression="venIdFk" UniqueName="venIdFk" DataType="System.Int32" FilterControlAltText="Filter venIdFk column" ReadOnly="true"></telerik:GridBoundColumn

<telerik:GridTemplateColumn DataField="venDocPath" HeaderText="Download" SortExpression="venDocPath" UniqueName="venDocPath" FilterControlAltText="Filter venDocPath column">

<ItemTemplate>

<asp:LinkButton ID="lnkDownload" Text="Download" CommandArgument='<%# Eval("venDocPath") %>' runat="server" OnClick="lnkDownload_Click"></asp:LinkButton>

</ItemTemplate>

</telerik:GridTemplateColumn>

</Columns>

</MasterTableView>

</telerik:RadGrid>

Here is the OnClick event of the link button:

protected void lnkDownload_Click(object sender, EventArgs e)

{

string filePath = (sender as LinkButton).CommandArgument;

Response.ContentType = ContentType;

Response.AppendHeader("Content-Disposition", "attachment; filename=" + Path.GetFileName(filePath));

Response.WriteFile(filePath);

Response.End();

}

I am still unable to get the file to download.

I have tried the following as well, but I still couldn't get the file to download - Download File From Grid Column

I also reviewed this demo - Column Types in Grid

Any help would be greatly appreciated.

Thanks,

Download a file from link button in grid

3 Answers, 1 is accepted