Changing an image in a datagrid column in the ItemDataBound event

[MW]

Hi,

I have a datagrid that is bound to a datatable, I'm using
TemplateColumns.

The heading of two columns of the datagrid fire the
ItemCommand event in which I sort the datatable then
rebind to the datagrid. One column is an image (which
the imageurl is set in the first binding of the grid).

On the ItemDataBound event after the sort when the
datatable is re-binded to the grid, I go through the
datatable because I want to change the image based on the
column value (which I know is sorting properly), but the
images aren't changing. I can't seem to figure out why.

on the aspx page:
<asp:TemplateColumn>
<ItemTemplate>
<asp:Image Runat="server" />
</ItemTemplate>
</asp:TemplateColumn>

in the code behind (ItemDataBound event):
Dim bolClosed as Boolean

If e.Item.ItemType = ListItemType.Item Or e.Item.ItemType
= ListItemType.AlternatingItem Then
bolClosed = CType(myDataTable.Rows
(e.Item.ItemIndex).Item("Closed"), Boolean)

If bolClosed Then
imgStatus = CType(e.Item.Cells(1).Controls
(1), WebControls.Image)
imgStatus.ImageUrl =
Request.ApplicationPath & "/Images/closed.gif"
Else
imgStatus = CType(e.Item.Cells(1).Controls
(1), WebControls.Image)
imgStatus.ImageUrl =
Request.ApplicationPath & "/Images/open.gif"
End If
End If

[Eliyahu Goldin]

Does the code set bolClosed correctly to true/false depending on the
"Closed" field content?

BTW, why are you using myDataTable.Rows (e.Item.ItemIndex).Item("Closed")
instead of simple e.Item("Closed")?

Eliyahu

"MW" <anonymous@discussions.microsoft.com> wrote in message
news:791d01c49511$e11e79b0$a501280a@phx.gbl...

> Hi,
>
> I have a datagrid that is bound to a datatable, I'm using
> TemplateColumns.
>
> The heading of two columns of the datagrid fire the
> ItemCommand event in which I sort the datatable then
> rebind to the datagrid. One column is an image (which
> the imageurl is set in the first binding of the grid).
>
> On the ItemDataBound event after the sort when the
> datatable is re-binded to the grid, I go through the
> datatable because I want to change the image based on the
> column value (which I know is sorting properly), but the
> images aren't changing. I can't seem to figure out why.
>
> on the aspx page:
> <asp:TemplateColumn>
> <ItemTemplate>
> <asp:Image Runat="server" />
> </ItemTemplate>
> </asp:TemplateColumn>
>
> in the code behind (ItemDataBound event):
> Dim bolClosed as Boolean
>
> If e.Item.ItemType = ListItemType.Item Or e.Item.ItemType
> = ListItemType.AlternatingItem Then
> bolClosed = CType(myDataTable.Rows
> (e.Item.ItemIndex).Item("Closed"), Boolean)
>
> If bolClosed Then
> imgStatus = CType(e.Item.Cells(1).Controls
> (1), WebControls.Image)
> imgStatus.ImageUrl =
> Request.ApplicationPath & "/Images/closed.gif"
> Else
> imgStatus = CType(e.Item.Cells(1).Controls
> (1), WebControls.Image)
> imgStatus.ImageUrl =
> Request.ApplicationPath & "/Images/open.gif"
> End If
> End If

[MW]

Hi Eliyau,

thanks for the response. I was able to solve my problem
based on what you told me. I couldn't use e.Item
("Closed"), but e.Item.DataItem("Closed") gave me the
proper value.

There is a difference between what myDataTable.Rows
(e.Item.ItemIndex).Item("Closed") returns as a value and
what e.Item.DataItem("Closed") returns.

So, the difference must be because the View of the
datatable is sorted, not the datatable?

Thanks,

>-----Original Message-----
>Does the code set bolClosed correctly to true/false

depending on the

>"Closed" field content?
>
>BTW, why are you using myDataTable.Rows

(e.Item.ItemIndex).Item("Closed")

>instead of simple e.Item("Closed")?
>
>Eliyahu
>
>"MW" <anonymous@discussions.microsoft.com> wrote in

message

>news:791d01c49511$e11e79b0$a501280a@phx.gbl...

>> Hi,
>>
>> I have a datagrid that is bound to a datatable, I'm

using

>> TemplateColumns.
>>
>> The heading of two columns of the datagrid fire the
>> ItemCommand event in which I sort the datatable then
>> rebind to the datagrid. One column is an image (which
>> the imageurl is set in the first binding of the grid).
>>
>> On the ItemDataBound event after the sort when the
>> datatable is re-binded to the grid, I go through the
>> datatable because I want to change the image based on

the

>> column value (which I know is sorting properly), but

the

>> images aren't changing. I can't seem to figure out

why.

>>
>> on the aspx page:
>> <asp:TemplateColumn>
>> <ItemTemplate>
>> <asp:Image Runat="server" />
>> </ItemTemplate>
>> </asp:TemplateColumn>
>>
>> in the code behind (ItemDataBound event):
>> Dim bolClosed as Boolean
>>
>> If e.Item.ItemType = ListItemType.Item Or

e.Item.ItemType

>> = ListItemType.AlternatingItem Then
>> bolClosed = CType(myDataTable.Rows
>> (e.Item.ItemIndex).Item("Closed"), Boolean)
>>
>> If bolClosed Then
>> imgStatus = CType(e.Item.Cells

(1).Controls

>> (1), WebControls.Image)
>> imgStatus.ImageUrl =
>> Request.ApplicationPath & "/Images/closed.gif"
>> Else
>> imgStatus = CType(e.Item.Cells

(1).Controls

>> (1), WebControls.Image)
>> imgStatus.ImageUrl =
>> Request.ApplicationPath & "/Images/open.gif"
>> End If
>> End If

>
>
>.
>