I have a checkbox and a textbox. When the checkbox is checked I want make the textbox required.
I tried what's below but it is not working.
<asp:CheckBox ID="chkSubmit" runat="server" oncheckedchanged="chkSubmit_CheckedChanged" />
Email:
<asp:TextBox ID="txtEmail" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="valtxtEmail" runat="server" ControlToValidate="txtEmail" SetFocusOnError="true" ErrorMessage="Required" Enabled="False"></asp:RequiredFieldValidator>
protected void chkSubmit_CheckedChanged(object sender, EventArgs e)
{
valtxtEmail.Enabled = true;
}
...
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