Sir,
I have textbox on page and I have set its OnTextChnaged property. Used regular expression for numbers only. But when I type invalid characters textbox OnTextChange event got fired even if validation is false.
I want OnTextChange event should get fire only when user statisfy the validations.
How should I avoid this?
html
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body><center>
<form id="form1" runat="server">
<asp:TextBox ID="TextBox1" runat="server" AutoPostBack="True" OnTextChanged="TextBox1_TextChanged"></asp:TextBox><br />
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="RequiredFieldValidator" ControlToValidate="TextBox1" Display="Dynamic" ForeColor="Red"></asp:RequiredFieldValidator><br />
<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ErrorMessage="RegularExpressionValidator" ControlToValidate="TextBox1" Display="Dynamic" ForeColor="Red" ValidationExpression="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"></asp:RegularExpressionValidator>
</form>
</center>
</body>
</html>