Finding control in DataList itemBound

[neverstill]

Hi-
I have an asp:image control in the ItemTemplate of a DataList
currently, in the ItemDataBound event, I am getting a reference to the image
control by looping through all the controls in the DataItem and checking if
it is an image control. This is ugly. I can't use "FindControl" cause I
don't know the ID as it is changed each time. I guess I could do some
tricky string work, but that would not be full proof.

Is there an easy way to get a control that is dynamically created at runtime
like this?

Any ideas?

Thanks,
Steve

[Teemu Keiski]

Hi,

Couldn't you reference it with an index from Controls collection?

Why does the ID change, by the way? As every DataListItem is naming
container for its child controls, they can all have controls with the same
ID say

<ItemTemplate>
<asp:Image ID="myImage" runat="server" />
</ItemTemplate>

even if the Image would be created somehow dynamically in code, this should
work fine. You can in ItemDataBound reference them separately per item (as
you know I suppose, but I am wondering why the ID changes)

--
Teemu Keiski
MCP, Microsoft MVP (ASP.NET), AspInsiders member
ASP.NET Forum Moderator, AspAlliance Columnist
"neverstill" <sk************@yahoo.com> wrote in message
news:OF**************@TK2MSFTNGP09.phx.gbl...

Hi-
I have an asp:image control in the ItemTemplate of a DataList
currently, in the ItemDataBound event, I am getting a reference to the image control by looping through all the controls in the DataItem and checking if it is an image control. This is ugly. I can't use "FindControl" cause I
don't know the ID as it is changed each time. I guess I could do some
tricky string work, but that would not be full proof.

Is there an easy way to get a control that is dynamically created at runtime like this?

Any ideas?

Thanks,
Steve

[neverstill]

actually, you pointed out a major oversight on my part. I inspected the
result rendered HTML and noted that the ID values for each image had
changed, but it appears that in the ItemDataBound, they are not, they are
the same.. as you stated.

So, FindControl() works just great. I never even tried it, thought I was
being efficient and working around something that didn't need to be worked
around. ;)

Thanks!
"Teemu Keiski" <jo****@aspalliance.com> wrote in message
news:%2****************@TK2MSFTNGP11.phx.gbl...

Hi,

Couldn't you reference it with an index from Controls collection?

Why does the ID change, by the way? As every DataListItem is naming
container for its child controls, they can all have controls with the same
ID say

<ItemTemplate>
<asp:Image ID="myImage" runat="server" />
</ItemTemplate>

even if the Image would be created somehow dynamically in code, this should work fine. You can in ItemDataBound reference them separately per item (as
you know I suppose, but I am wondering why the ID changes)

--
Teemu Keiski
MCP, Microsoft MVP (ASP.NET), AspInsiders member
ASP.NET Forum Moderator, AspAlliance Columnist
"neverstill" <sk************@yahoo.com> wrote in message
news:OF**************@TK2MSFTNGP09.phx.gbl...

Hi-
I have an asp:image control in the ItemTemplate of a DataList
currently, in the ItemDataBound event, I am getting a reference to the

image

control by looping through all the controls in the DataItem and checking

if

it is an image control. This is ugly. I can't use "FindControl" cause I don't know the ID as it is changed each time. I guess I could do some
tricky string work, but that would not be full proof.

Is there an easy way to get a control that is dynamically created at

runtime

like this?

Any ideas?

Thanks,
Steve

[Teemu Keiski]

Hi,

that is because the control is in naming container and controls inside
different naming containers can have same IDs. As a result, ClientID and
UniqueID reflect the position in the control tree, but ID itself stays the
same despite the position (hierarchically in containers and so on)

FindControl method always looks inside the current naming container (you
search for the current DataListItem, naming container, in ItemDataBound when
you use e.Item.FindControl) and as IDs are same there in every item, using
the plain ID with FindControl works fine.

Glad to know I could help you!

--
Teemu Keiski
MCP, Microsoft MVP (ASP.NET), AspInsiders member
ASP.NET Forum Moderator, AspAlliance Columnist
"neverstill" <sk************@yahoo.com> wrote in message
news:ej**************@tk2msftngp13.phx.gbl...

actually, you pointed out a major oversight on my part. I inspected the
result rendered HTML and noted that the ID values for each image had
changed, but it appears that in the ItemDataBound, they are not, they are
the same.. as you stated.

So, FindControl() works just great. I never even tried it, thought I was
being efficient and working around something that didn't need to be worked
around. ;)

Thanks!
"Teemu Keiski" <jo****@aspalliance.com> wrote in message
news:%2****************@TK2MSFTNGP11.phx.gbl...

Hi,

Couldn't you reference it with an index from Controls collection?

Why does the ID change, by the way? As every DataListItem is naming
container for its child controls, they can all have controls with the same

ID say

<ItemTemplate>
<asp:Image ID="myImage" runat="server" />
</ItemTemplate>

even if the Image would be created somehow dynamically in code, this should

work fine. You can in ItemDataBound reference them separately per item (as you know I suppose, but I am wondering why the ID changes)

--
Teemu Keiski
MCP, Microsoft MVP (ASP.NET), AspInsiders member
ASP.NET Forum Moderator, AspAlliance Columnist
"neverstill" <sk************@yahoo.com> wrote in message
news:OF**************@TK2MSFTNGP09.phx.gbl...

Hi-
I have an asp:image control in the ItemTemplate of a DataList
currently, in the ItemDataBound event, I am getting a reference to the

image

control by looping through all the controls in the DataItem and

checking if

it is an image control. This is ugly. I can't use "FindControl"

cause I don't know the ID as it is changed each time. I guess I could do some
tricky string work, but that would not be full proof.

Is there an easy way to get a control that is dynamically created at

runtime

like this?

Any ideas?

Thanks,
Steve