I found a very good article to check that at least one chekbox is selected in a checkboxlist control. Works exactly like required field validator.

http://forums.asp.net/t/1000658.aspx (check answer from user yasserzaid)

<script type=”text/javascript”>

function ValidateRolesSelection(source, args)

{

//if your checkboxlist control is on simple asp.net page

var chkListModules = document.getElementById(‘<%= RolesCheckBoxList.ClientID %>’);

//if your checkboxlist control is inside some user control for e.g in CreateUserWizard

//var chkListModules = document.getElementById(‘<%= (CreateUserWizard1.WizardSteps[0].Controls[0].FindControl(“RolesCheckBoxList”) as CheckBoxList).ClientID %>’);

var chkListinputs = chkListModules.getElementsByTagName(“input”);

for (var i = 0; i < chkListinputs.length; i++)

{

if (chkListinputs[i].checked)

{

args.IsValid = true;

return;

}

}

args.IsValid = false;

}

</script>

The path of the ClickOnce installed application is sort of hidden. Below is the sample path;

C:\Documents and Settings\USERNAME\Local Settings\Apps\2.0\OZNAN8K7.K0W\P7TP6M3R.WZ4\AppDllName…..WEREWC.334

USERNAME: Is the logged user name.

The second last and third last folder name differ from machine to machine but sort of garbage name.

AppDllName…..WEREWC.334: Last folder name start from application dll name then “…” and then again some garbage.

I got this error when I am trying to send mail using System.Net.Mail. I got this error because our exchange server does not relay those emails in which From Address and Reply To Address are different. I have a requirement that both need to be different, for this network administrator must need to allow this thing in exchange server.

I need to check character length between 9 to 24 need to be all numbers. I have applied below regular expression validator.

<asp:RegularExpressionValidator ID=”revBankAccountNo” runat=”server” ControlToValidate=”txtBankAccountNo” Display=”Dynamic” SetFocusOnError=”True” ValidationExpression=”^[0-9]{4,24}$”>*</asp:RegularExpressionValidator>