January 26, 2015 06:23 by
Peter
At this short article, we will Create validation control's Error messages in Alert box in ASP.NET 5. First step, you need to know about how to show validation control's Error messages in Alert box in ASP.NET. Then, write the following code:
ASP.NET
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajax" %>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>How to show validation control's Error messages in Alert box in ASP.NET</title>
</head>
<body>
<form id="form1" runat="server">
<table>
<tr>
<td>
<asp:Label ID="lblName" runat="server" Text="Name"></asp:Label>
</td>
<td>
<asp:TextBox ID="txtName" runat="server" ValidationGroup="Validation"></asp:TextBox>
<asp:RequiredFieldValidator ID="rfvName" runat="server" ControlToValidate="txtName"
Display="None" ErrorMessage="Name is Required" ValidationGroup="Validation"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td>
<asp:Label ID="lblGender" runat="server" Text="Gender"></asp:Label>
</td>
<td>
<asp:DropDownList ID="ddlGender" runat="server" ValidationGroup="Validation">
<asp:ListItem Selected="True" Value="0">--Select--</asp:ListItem>
<asp:ListItem Value="1">Male</asp:ListItem>
<asp:ListItem Value="2">Female</asp:ListItem>
</asp:DropDownList>
<asp:CompareValidator ID="CVGender" runat="server" ControlToValidate="ddlGender"
Display="None" ErrorMessage="Gender is Required" Operator="NotEqual" ValidationGroup="Validation"
ValueToCompare="0"></asp:CompareValidator>
</td>
</tr>
<tr>
<td>
<asp:Label ID="lblEmail" runat="server" Text="Email Address"></asp:Label>
</td>
<td>
<asp:TextBox ID="txtEmail" runat="server" ValidationGroup="Validation"></asp:TextBox>
<asp:RegularExpressionValidator ID="regEmail" runat="server" ControlToValidate="txtEmail"
Display="None" ValidationGroup="Validation" ErrorMessage="Enter Valid Email address "
ValidationExpression="^([a-zA-Z][\w\.-]*[a-zA-Z0-9]@[a-zA-Z0-9][\w\.-]*[a-zA-Z0-9]\.[a-zA-Z][a-zA-Z\.]*[a-zA-Z]){1,70}$">
</asp:RegularExpressionValidator>
</td>
</tr>
<tr>
<td>
<asp:Label ID="lblValidation" runat="server" Text="* Marked fields are mandatory"
ForeColor="Red"></asp:Label>
</td>
</tr>
<tr>
<td colspan="2">
<asp:Button ID="btnShowAlert" runat="server" Text="Show Alert" ValidationGroup="Validation" />
<asp:ValidationSummary ID="ValidationSummary1" runat="server" ShowMessageBox="True"
ShowSummary="False" ValidationGroup="Validation" />
</td>
</tr>
</table>
</form>
</body>
</html>
And here is the result:
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