Question

I am using the following code to set a datasource for a dropdown inside of my gridview but it is not working.

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        DropDownList drop = (DropDownList)e.Row.FindControl("folderslist");
        drop.DataSource = list;
        drop.DataBind(); 

    }

list is a list of strings, which binds find to a dropdown I have outside of my gridview. However the code above does not populate the dropsdown inside the gridview.

<asp:GridView ID="GridView1" HorizontalAlign="Center" 
                                AutoGenerateColumns="false" CellSpacing="5" CellPadding="5" CssClass="GridView" Font-Size="Small"
                                runat="server" OnRowDataBound = "GridView1_RowDataBound" >

                         <Columns>


                         <asp:BoundField HeaderText="From" DataField="From" />

                         <asp:BoundField HeaderText="Subject" DataField="Subject" />

                         <asp:BoundField HeaderText="Received" DataField="Received" />





                         <asp:TemplateField HeaderText="Attachments" ItemStyle-HorizontalAlign="Center">
                                    <ItemTemplate>
                                        <asp:ImageButton runat="server" ID="attach" CommandName="viewattachments" Text="More"
                                            ImageUrl="~/images/notes.png" visible='<%# System.Convert.ToBoolean((DataBinder.Eval(Container.DataItem, "Attachments").ToString() == "") ? false : true) %>' />


                                    </ItemTemplate>
                                    <ItemStyle HorizontalAlign="Center"></ItemStyle>
                                </asp:TemplateField>


                                <asp:TemplateField HeaderText="Move To" ItemStyle-HorizontalAlign="Center">
                                    <ItemTemplate>

                                      <asp:DropDownList ID="folderslist" runat="server"></asp:DropDownList>

                                    </ItemTemplate>
                                    <ItemStyle HorizontalAlign="Center"></ItemStyle>
                                </asp:TemplateField>

</Columns>
                            </asp:GridView>

Answer 1

The dropdown in gridview is folders not folderlist. Give folders in e.Row.FindControl() method. Debugging the code could help you whats happening. Also make sure you have data in list.

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    DropDownList drop = (DropDownList)e.Row.FindControl("folders");
    drop.DataSource = list;
    drop.DataBind(); 

}