<%@ page language="c#" autoeventwireup="true" %>
<script language="c#" runat="server">
void page_load(object sender,eventargs e){
}
void buttonclick(object sender,eventargs e){
if (page.isvalid){
label_1.text=textbox_1.text;
}
else{
label_1.text="error input!";
}
}
</script>
<form id="form_1" runat="server">
<asp:textbox id="textbox_1" runat="server"/>
<asp:regularexpressionvalidator id="regularexpressionvalidator1"
controltovalidate="textbox_1"
validationexpression=".*@.*\..*"
display="static"
enableclientscript="false"
errormessage="error e-mail!"
runat="server"/>
<asp:button id="button_1" text="button" onclick="buttonclick" runat="server"/>
</form>
<asp:label id="label_1" runat="server"></asp:label>
