About validator

Question

how to use Asp.net validation controls as required field validator and all validator thanks

Brajesh Kumar · Answer

Hi Dhiraj Here is a code sample that uses RequiredFieldValidator together with CustomValidator. It validates both fields, as well as when one of them fails, and displays the error messages in the ValidationSummary. The CustomValidator has OnServerValidate function in the code behind. The .aspx markup: Name: ID="TextBox1" runat="server"> ID="RequiredFieldValidator1" runat="server" EnableClientScript="false" ControlToValidate="TextBox1" ErrorMessage="The 'Name' field cannot be empty!" Text="*" ForeColor="Red" Display="Dynamic"> /> /> Number: ID="TextBox2" runat="server"> ID="CustomValidator1" runat="server" ValidateEmptyText="true" ControlToValidate="TextBox2" ErrorMessage="The 'Number' field must be exactly 5 digits!" Text="*" ForeColor="Red" Display="Dynamic" onservervalidate="CustomValidator1_ServerValidate"> ID="ValidationSummary1" runat="server" HeaderText="Please check the following fields:" ForeColor="Red" DisplayMode="BulletList" /> /> ID="Button1" runat="server" Text="Submit" /> and the validation function in .aspx.cs file: protected void CustomValidator1_ServerValidate(object source, ServerValidateEventArgs args) { if (args.Value.Length 5) { args.IsValid = false; } else { args.IsValid = true; } } Hope it will help or you can visit http://asp.net-tutorials.com/validation/required-field-validator/ https://www.codeproject.com/Articles/49527/How-to-Use-the-ASP-NET-Validation-Control-to-Valid

Rajeesh Menoth · Answer

Hi, Required field validator : Makes an input control a required field Please check the following reference : https://www.c-sharpcorner.com/UploadFile/puranindia/validation-controls-in-Asp-Net/ http://asp.net-tutorials.com/validation/required-field-validator/ https://www.aspsnippets.com/Articles/Display-ASPNet-Validators-RequiredFieldValidator-Validation-Error-Messages-inside-TextBox-Control.aspx

About validator

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