Is there a way to add triggers at runtime? I have a bunch of dynamic images that show that I want to add the click events as triggers to update a larger image. Thanks.
I don't think you can add triggers dynamically (maybe it's possible, I don't see a way however).
The best way to procede depends on your needs. If *all* you need is your UpdatePanel to update() when some image is clicked and you don't know what / how many images at runtime, you could just dynamically add the image controls to the UpdatePanel's container controls, and give each image an onclick attribute with a postback reference. Something like this:
<%@. Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" EnableEventValidation="false" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head runat="server"> <title>Untitled Page</title></head><script runat="server"> protected void Page_Load(object sender, EventArgs e) { Image Image1 = new Image(); UpdatePanel1.ContentTemplateContainer.Controls.Add(Image1); Image1.ID = "Image1"; Image1.ImageUrl = "img.png"; Image1.Attributes.Add("onclick", ClientScript.GetPostBackClientHyperlink(Image1, "Image1PostBack")); }</script><body> <form id="form1" runat="server"> <asp:ScriptManager ID="ScriptManager1" runat="server" EnablePartialRendering="true" /> <asp:UpdatePanel ID="UpdatePanel1" runat="server" > <ContentTemplate> asdf </ContentTemplate> </asp:UpdatePanel> </form></body></html>If the dynamic images need to be outside the UpdatePanel you want to trigger - does it matter to your update which dynamic image was clicked? Depending on that, there are other possibillities.
Ben
Ben,
Thanks for the post. I figured it out. You can add triggers to the updatepanel.
Dim x As New AsyncPostBackTriggerx.ControlID = <name of control that will be doing the update>x.EventName = "Click"update.Triggers.Add(x)Just make sure this runs even after a post back.
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