C# - Button Event In Web User Control?
Oct 21, 2010
I have a problem with button event in web user control
First i have an aspx like this:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="AddTest.aspx.cs" Inherits="AddTest" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script src="js/jquery-1.4.2.min.js" type="text/javascript"></script>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<div id="divContent" runat="server">
</div>
</form>
</body>
</html>
As you see i have a ScriptManager to do with ASP.NET AJAX, a div with ID divContent to load controls, then in code behind:
protected void Page_Load(object sender, EventArgs e)
{
divContent.Controls.Add(LoadControl("~/thitai/addtest.ascx"));
}
I add addtest.ascx to divContent as you see, and this is the code of addtest.ascx
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="addtest.ascx.cs" Inherits="thitai.addtest" %>
<asp:UpdatePanel ID="updatePanel" runat="server" ClientIDMode="Static">
<ContentTemplate>
<input type="button" value="Load text" onclick="updPanel('text');return false;" />
<input type="button" value="Load image" onclick="updPanel('image');return false;" />
<asp:HiddenField ID="hftype" runat="server" ClientIDMode="Static" />
<div>
<asp:PlaceHolder ID="plhControl" runat="server"></asp:PlaceHolder>
</div>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
</ContentTemplate>
</asp:UpdatePanel>
<script type="text/javascript">
function updPanel(type) {
$("#hftype").val(type);
__doPostBack("updatePanel", "");
}
</script>
Each time i click on Load text button, i change the value of hfType (hidden field) then do postback to server using UpdatePanel, then this is code behind
protected override void OnPreRender(EventArgs e)
{
string type = hftype.Value;
switch (type)
{
case "text":
plhControl.Controls.Add(LoadControl("~/thitai/test/text.ascx"));
break;
case "image":
plhControl.Controls.Add(LoadControl("~/thitai/test/image.ascx"));
break;
default:
plhControl.Controls.Add(LoadControl("~/thitai/test/text.ascx"));
break;
}
base.OnPreRender(e);
}
This is the code of text.ascx
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="text.ascx.cs" Inherits="thitai.test.text" %>
<%@ Register Assembly="Support" Namespace="Support.CustomEditor" TagPrefix="Editor" %>
<Editor:CustomEditor ID="edNoidung" runat="server" NoScript="True" Content=""
Height="500" ActiveMode="Design" NoUnicode="True" InitialCleanUp="False" />
<div>
<asp:Button ID="Button1" runat="server" Text="Show HTML"
onclick="Button1_Click" />
</div>
<div id="showHtml" runat="server"></div>
And code behind of text.ascx
protected void Button1_Click(object sender, EventArgs e)
{
showHtml.InnerHtml = edNoidung.Content;
}
The problem is: when i click to button1, the page do a postback using AJAX but event Button1_Click DOES NOT FIRE!
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