How to a grid column download a file using the path of the file

[Duan]

Hi erveryone,

I wonder if there is any way to create a column in my grid, which is a link or a button or anything that is done by clicking a download of a file (.jpg, .doc, .txt ...) that is located in a folder of my solution. I emphasize that I have saved the file path in the database and I can load it in the column, if necessary.

Thanks

[Jayesh Goyani]

Hello,

<telerik:RadGrid ID="RadGrid3" runat="server" AutoGenerateColumns="false" OnNeedDataSource="RadGrid3_NeedDataSource"
           OnItemDataBound="RadGrid3_ItemDataBound" OnItemCommand="RadGrid3_ItemCommand">
           <MasterTableView DataKeyNames="ID" CommandItemDisplay="Top">
               <Columns>
                   <telerik:GridBoundColumn HeaderText="ID" DataField="ID" UniqueName="ID">
                   </telerik:GridBoundColumn>
                   <telerik:GridBoundColumn HeaderText="Name" DataField="Name" UniqueName="Name">
                   </telerik:GridBoundColumn>
                   <telerik:GridTemplateColumn>
                       <ItemTemplate>
                           <asp:LinkButton ID="LinkButton1" runat="server" CommandName="DownloadMyFile" Text='<%# Eval("path") %>' CommandArgument='<%# Eval("path") %>'></asp:LinkButton>
                       </ItemTemplate>
                   </telerik:GridTemplateColumn>
               </Columns>
           </MasterTableView>
       </telerik:RadGrid>

protected void RadGrid3_ItemCommand(object sender, GridCommandEventArgs e)
   {
       if (e.CommandName == "DownloadMyFile")
       {
           GridDataItem item = e.Item as GridDataItem;
           // ACCESS KEy
           string strID = item.GetDataKeyValue("ID").ToString();
           //ACCESS COLUMN
           string strName = item["Name"].Text;

           // Download File
           string path = Server.MapPath("~/images/" + e.CommandArgument);
           string attachment = "attachment; filename=" + e.CommandArgument;
           Response.Clear();
           Response.AddHeader("content-disposition", attachment);
           Response.ContentType = "image/jpeg";
           Response.WriteFile(path);
           Response.End();
       }
   }


protected void RadGrid3_NeedDataSource(object sender, GridNeedDataSourceEventArgs e)
   {

       dynamic data = new[] {
               new { ID = 1, Name ="Name1",path="1.jpg"},
               new { ID = 2, Name = "Name2",path="2.jpg"},
               new { ID = 3, Name = "Name3",path="3.jpg"}
           };
       RadGrid3.DataSource = data;


   }

// IF YOUR GRID AJAXIFIED THEN ADD ALSO ADD BELOW CODE.

<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
       <ClientEvents OnRequestStart="onRequestStart" />
       <AjaxSettings>
           <telerik:AjaxSetting AjaxControlID="RadGrid3">
               <UpdatedControls>
                   <telerik:AjaxUpdatedControl ControlID="RadGrid3" />
               </UpdatedControls>
           </telerik:AjaxSetting>
       </AjaxSettings>
       </telerik:RadAjaxManager>

function onRequestStart(sender, args) {
               if (args.get_eventTarget().indexOf("LinkButton1") >= 0) {
                   args.set_enableAjax(false);
               }
           }

Thanks,
Jayesh Goyani

[Bill]

Hello Jayesh,

Is there anyway you could provide a solution to upload the files to the same path to the associated folder as well, that way we have the whole solution for upload and download.

Thanks,
Bill

[Eyup]

Hello Bill,

Please check out the following demo to get a practical idea of downloading and uploading files using a RadGrid:
 Grid / Attachment Column

I hope this will prove helpful.

Kind regards,
Eyup
the Telerik team