GridImageColumn databinding code

[Karthi]

Hi,

    I'm using GridImageColumn in to display a icon if the value in the table is false.

Please find the aspx code below.

<

 

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>

 

Please find the aspx.cs code below

 

protected void TelerikThread_ItemDataBound(object sender, GridItemEventArgs e)

 

 

{

 

 

if (e.Item is GridDataItem)

 

 

{

 

 

GridDataItem item = (GridDataItem)e.Item.DataItem;

 

 

 

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/imges/post_status_new_ln.gif";//set image url

 

}

 

else

 

{

 

TableCell cell = (TableCell)item["GridImageColumn"];

 

 

cell.Text =

" ";//clears image column

 

}

}

}


Exception is thrown in this line

 

 

GridDataItem

 

item = (GridDataItem)e.Item.DataItem;

 

 

 

Help me with the solution

 

 

 

[Shinu]

Hello Karthi,

You can access grid data item using ' GridDataItem item = (GridDataItem)e.Item' .

-Shinu.

[Karthi]

Hi
If I access it as you mentioned I'm getting exception as "Cannot find cell bound to 'HasRead'" in the line

TableCell flag = (TableCell)item["HasRead"];

Thanks,
Karthi

[Tsvetina]

Hello Karthi,

This is so because you should use the column UniqueName when referencing the table cell:

TableCell flag = (TableCell)item["GridImageColumn"];

All the best,
Tsvetina
the Telerik team