ASP.NET Radio Button State and Back Key
- by Dave S
When using the browser back key on a page with radio buttons and using auto-postback, the state of the buttons (checked) stays the same while other parts of the page do not. This results in a situation where button two is checked and the cached page (because of server-side logic) displays a message that button 1 is checked.
What is the best way to handle this situation?
The following code example exhibits this behavior:
[Form:]
<asp:RadioButton ID="rb1" runat="server" AutoPostBack="true" Text="Button1" OnCheckedChanged="rb_CheckedChanged"
GroupName="rbgroup" Checked="true" />
<br />
<asp:RadioButton ID="rb2" runat="server" AutoPostBack="true" Text="Button2" OnCheckedChanged="rb_CheckedChanged"
GroupName="rbgroup" />
<br />
<hr />
<asp:Label ID="lbl1" runat="server">Button 1</asp:Label>
[Code Behind:]
protected void rb_CheckedChanged(object sender, EventArgs e)
{
if (rb1.Checked == true)
lbl1.Text = "Button 1";
else
lbl1.Text = "Button 2";
}
