Displaying Error Messages in a Message Box Using the ValidationSummary Control (VB.net)
<%@ Page Language=VB Debug=true %>
<HTML>
<HEAD>
<TITLE>Displaying Error Messages in a Message Box Using the ValidationSummary Control</TITLE>
</HEAD>
<BODY LEFTMARGIN="40">
<form runat="server">
<BR>
<asp:validationsummary
id="vsAllErrors"
showsummary="False"
showmessagebox="True"
runat="server"
headertext="For these reasons, your data could not be processed:"
/>
<BR>
Enter Your Name:<BR>
<asp:textbox
id="txtName"
runat=server
/>
<asp:requiredfieldvalidator
id="rfvName"
controltovalidate="txtName"
errormessage="The name field is required!"
runat=server
>
*
</asp:requiredfieldvalidator>
<BR>
Please enter a Date:<BR>
<asp:textbox
id="txtDate"
runat=server
/>
<asp:comparevalidator
id="cvCheckDate"
controltovalidate="txtDate"
operator="DataTypeCheck"
type="Date"
errormessage="The date field must be a date!"
runat="server"
>
*
</asp:CompareValidator>
<BR><BR>
<asp:button
id="butOK"
text="OK"
type="Submit"
runat="server"
/>
</form>
</BODY>
</HTML>
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