GridImageColumn DataBinding Code

[Karthi]

I am using GridImageColumn for displaying an icon if the value in a table column (HasRead) which is bound to the RadGrid Control is false.

Here is the aspx code..

<Telerik:RadGrid ID="TelerikThread" Width="97%" AllowSorting="True" PageSize="15"
    OnItemDataBound="TelerikThread_ItemDataBound" AllowPaging="True"
    AllowMultiRowSelection="True" runat="server" Gridlines="None">
<MasterTableView Width="100%" Summary="RadGrid table"   AutoGenerateColumns="false" >
<PagerStyle Mode="NextPrevAndNumeric" />
<Columns>
<Telerik:GridImageColumn UniqueName="GridImageColumn" SortExpression="HasRead"
    HeaderText="Unread" DataImageUrlFields="HasRead">
</Telerik:GridImageColumn>

Below is the code behind

      protected void TelerikThread_ItemDataBound(object sender, GridItemEventArgs e)
      {
          if (e.Item is GridDataItem)
          {
              GridDataItem item = (GridDataItem)e.Item;
              TableCell flag = (TableCell)item["HasRead"];
              if (flag.Text == "false")
              {
                  System.Web.UI.WebControls.Image img = (System.Web.UI.WebControls.Image)item["GridImageColumn"].Controls[0];
                  img.ImageUrl = "./web/Themes/default/images/post_status_new_ln.gif";//set image url
              }
              else
              {
                  TableCell cell = (TableCell)item["GridImageColumn"];
                  cell.Text = " ";//clears image column
              }
          }
}

I'm getting exception in the line GridDataItem item = (GridDataItem)e.Item;
"Cannot cast e.item to GridDataItem"

Please help me resolving this..

Thanks in advance.

[Princy]

Hello Karthi,

I am not quite sure about your issue and I assume that the field HasRead is not there in Grid and you want to get it. If that the case try this approach.
C#:


protected void rad_ItemDataBound(object sender, GridItemEventArgs e)
{
    if (e.Item is GridDataItem)
    {
        GridDataItem item = (GridDataItem)e.Item;
        DataRowView rowview = (DataRowView)item.DataItem;
        string flag =rowview["HasRead"].ToString();
        if (flag == "True")
        {
            System.Web.UI.WebControls.Image img = (System.Web.UI.WebControls.Image)item["GridImageColumn"].Controls[0];
            img.ImageUrl = "./web/Themes/default/images/post_status_new_ln.gif";//set image url
        }

Thanks,
Princy