Textbox on TextChanged event giving error!
Question
I have a textbox in my webpage and I want to fire as soon User clicks or enter something on this textbox. Code is working but it is firing when an User hits Enter button. I want it to fire when user types their 1st character. Which event is app for this?
This is my mockup code:
<asp:TextBox ID="txtAgentName" runat="server" OnTextChanged = "txtAgentName_TextChanged"></asp:TextBox>
But when I am running this webpage it is showing me this err:
CS0123: No overload for 'txtAgentName_TextChanged' matches delegate 'System.EventHandler'
I have this on my code behind:
protected virtual void txtAgentName_TextChanged(object sender, EventArgs e)
{
}
Made a breakpoint in in here, and seems like it is firing when I am hitting Enter button. I want to fire when user enter 1st character inside that textbox.
What I am doing wrong here?
3 answers
solution1
2 2011-04-20 16:03:49
your event handler must have this signature
protected void txtAgentName_TextChanged(object sender, EventArgs e)
{
...
}
does it?
solution2
1 2011-04-20 16:47:45
使用javascript的TextBox1.Attributes.Add("OnKeyPress", "GetKeyPress()") ，然后根据需要回发。
solution3
0 ACCPTED 2011-04-20 16:42:52
<%@ Page Language="C#" %>
<script runat="server">
protected void txtSearch_TextChanged(object sender, EventArgs e)
{
lblSearchResults.Text = "Search for: " + txtSearch.Text;
}
</script>
<html>
<head>
<title>TextBox AutoPostBack</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label
id="lblSearch"
Text="Search:"
Runat="server" />
<asp:TextBox
id="txtSearch"
AutoPostBack="true"
OnTextChanged="txtSearch_TextChanged"
Runat="server" />
<hr />
<asp:Label
id="lblSearchResults"
Runat="server" />
</div>
</form>
</body>
</html>
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