📄 webform-events.aspx

📁 ASP.NET Web Forms Techniques

💻 ASPX

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<%@Page Language="C#" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<style type="text/css">
body, td, tr, th {font-family:Tahoma,Arial,sans-serif; font-size:10pt}
input, select {font-family:Tahoma,Arial,sans-serif; font-size:9pt}
.heading {font-family:Tahoma,Arial,sans-serif; font-size:14pt; font-weight:bold}
.subhead {font-family:Tahoma,Arial,sans-serif; font-size:12pt; font-weight:bold; padding-bottom:5px}
.cite {font-family:Tahoma,Arial,sans-serif; font-size:8pt}
</style>
<title>Web Form 'Change' and 'Click' Events</title>
</head>
<body>
<span class="heading">Web Form 'Change' and 'Click' Events</span><p />

<form runat="server">

<asp:textbox id="MyText" text="OriginalValue"
     ontextchanged="MyChangeCode" runat="server" /> &nbsp;

<asp:dropdownlist id="MyListBox"
     onselectedindexchanged="MyChangeCode" runat="server">
  <asp:listitem text="Option 1" value="Value1" runat="server" />
  <asp:listitem text="Option 2" value="Value2" runat="server" />
  <asp:listitem text="Option 3" value="Value3" runat="server" />
</asp:dropdownlist> &nbsp;

<asp:checkbox id="MyCheckBox"
     oncheckedchanged="MyChangeCode" runat="server" /> &nbsp;

<asp:button id="MySubmitButton" text="Submit"
     onclick="MyClickCode" runat="server" /> &nbsp;

</form>

<div id="divResult" runat="server" enableviewstate="false" /><p />
<div class="cite">Change the values in the controls and click 'Submit'</div>

<script runat="server">

void MyChangeCode(object objSender, EventArgs objArgs) {
  Control ctrSender = (Control)objSender;
  divResult.InnerHtml += "Change event detected for control '"
                      + ctrSender.ID + "'<br />";
}

void MyClickCode(object objSender, EventArgs objArgs) {
  Control ctrSender = (Control)objSender;
  divResult.InnerHtml += "Click event detected for control '"
                      + ctrSender.ID + "'<br />";
}

</script>

<hr /><span class="cite">&copy;2002 <a class="cite" href="http://www.daveandal.net/">Dave And Al</a></span>
</body>
</html>

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