asked on Can an ASP Callback make an UpdatePanel update
Hi
Following on from an earlier question "ASP UpdatePanels not working together" I have another question as posed by the title "Can an ASP Callback make an UpdatePanel update"
ie, can a callback be initiated, change values server-side and update the controls on the updatepanel with the new values. Obviously, this goes beyond simple passing of some text back to the client callback method so please don't suggest that.
Thanks
Following on from an earlier question "ASP UpdatePanels not working together" I have another question as posed by the title "Can an ASP Callback make an UpdatePanel update"
ie, can a callback be initiated, change values server-side and update the controls on the updatepanel with the new values. Obviously, this goes beyond simple passing of some text back to the client callback method so please don't suggest that.
Thanks
ASP.NET
Last Comment
Vic-20
ASKER
Thanks, but as explained in the link for question "ASP UpdatePanels not working together" this will not (and does not, I've tried anyway) work since the design of UpdatePanels results in the last update cancelling any that went before.
ie, this does not work:
protected void Button1_Click(object sender, EventArgs e)
{
Thread.Sleep(2000);
LabelCounter.Text = DateTime.Now.ToString();
UP1.Update();
UP2.Update();
}
protected void Button2_Click(object sender, EventArgs e)
{
Thread.Sleep(4000);
LabelCounter2.Text = DateTime.Now.ToString();
UP1.Update();
UP2.Update();
}
ie, this does not work:
protected void Button1_Click(object sender, EventArgs e)
{
Thread.Sleep(2000);
LabelCounter.Text = DateTime.Now.ToString();
UP1.Update();
UP2.Update();
}
protected void Button2_Click(object sender, EventArgs e)
{
Thread.Sleep(4000);
LabelCounter2.Text = DateTime.Now.ToString();
UP1.Update();
UP2.Update();
}
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ASKER
Thanks for the links. Will wait for release of 4.5 obviously, and look further but for now to answer your question:
Pretend I have 2 grids, each on an update panel and each requiring some time to refresh. It would be nice if the 1st grid could be refreshed and while that is busy, work on grid 2 and maybe refresh it if need be. It could even be a save - the point is the same: have the 2 grids on their own panels working independently, asynchronously would be great.
Do you think this is possible or something that has to wait for .net 4.5?
Pretend I have 2 grids, each on an update panel and each requiring some time to refresh. It would be nice if the 1st grid could be refreshed and while that is busy, work on grid 2 and maybe refresh it if need be. It could even be a save - the point is the same: have the 2 grids on their own panels working independently, asynchronously would be great.
Do you think this is possible or something that has to wait for .net 4.5?
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ASKER
Yeah, it seems I have Async requirements not provided for by an UpdatePanel so I'll wait for 4.5.
Thanks for the tips on improving grid performance - I'll definitely keep the ideas for another day.
Thanks for the tips on improving grid performance - I'll definitely keep the ideas for another day.
ASKER
Provided understanding of what's possible with other tips
ChildrenAsTriggers = False
UpdateMode = Conditional
Then in code behind, in the LinkButtonID.Command or LinkButtonId.Click event, make your changes to the variables/contents then call the Update method on both updatepanels.