Question

I have an item template in a GridView and I want to create a dropdown for each row and bind it to a value retrieved from the database.. but I am not sure how to do this.. this is what i have so far.. but not sure where to put the code to populate the drop down per row..

 <ItemTemplate>
     <asp:DropDownList runat="server" ID="ddlMyQuantity" SelectedValue='<%# 
       (DataBinder.Eval(Container.DataItem,"Quantity")) %>'>
     </asp:DropDownList>
  </ItemTemplate>

and in code behind, not sure how to or where to put this so that it is created on every row..

 public void BindMyQuantity()
    {
        for (int i = 1; i < 15; i++)
        {
            ddlMyQuantity.Items.Add(i.ToString());
        }
    }

Also i am not sure if i can do that, but the code is not complaining.. adding SelectedValue in the asp declaration

Answer 1

You can use OnRowDataBound to dynamically bind your dropdown:

protected void GridView_RowDataBound(Object sender, GridViewRowEventArgs e)
{
  if(e.Row.RowType == DataControlRowType.DataRow)
  {
     var dropdownList = (DropDownList)e.Row.FindControl("ddlMyQuantity");
     for (int i = 1; i < 15; i++)
     {
        dropdownList.Items.Add(i.ToString());
     }
     dropdownList.SelectedValue = 
           Convert.ToString(DataBinder.Eval(e.Row.DataItem, "Quantity"));
  }
}

Add binding:

<asp:GridView ... OnRowDataBound="GridView_RowDataBound">
    ...
</asp:GridView>