dropdown list validation

Question

C# code to give requiored field validation to a dropdown list

Rajeesh Menoth · Answer

Hi, First see the Dropdownlist asp:DropDownList ID = " DropDownList1 " runat = "server" AppendDataBoundItems = "True" > asp:ListItem > --Select-- asp:ListItem > asp:ListItem > Pen asp:ListItem > asp:ListItem > Pencil asp:ListItem > asp:ListItem > Rubber asp:ListItem > asp:DropDownList > Then for validate see the requiredfield validator In RequiredFieldValidator have contain the property ControlToValidate there you need to mention your drop down id. asp:RequiredFieldValidator ID = "RequiredFieldValidator1" runat = "server" ControlToValidate = " DropDownList1 " ErrorMessage = "Value Required!" InitialValue = " --Select-- " > asp:RequiredFieldValidator > asp:Button ID = "Button1" runat = "server" Text = "Button" /> div > You must set InitialValue property of the RequiredFieldValidator with theat InitialValue match with DropDownList InitialValue. Reference : http://www.c-sharpcorner.com/blogs/asp-net-dropdownlist-validation-using-required-field-validation1

Bikesh Srivastava · Answer

Hi, Use this code to resolve your problem. "-1" ID= "Req_ID" Display= "Dynamic" ValidationGroup= "g1" runat= "server" ControlToValidate= "ControlID" Text= "*" ErrorMessage= "ErrorMessage" >

Delpin Susai Raj · Answer

Midhun Tp · Answer

Hi, Please try like below. You should give value as empty string in dropdowns first option for validation to work - CausesValidation="True" CssClass="fontStandardInput"> Value="" > Display="Dynamic" CssClass="fontValidation" SetFocusOnError="true" ErrorMessage="Select from the list.">

Minnu Merin Alex · Answer

i saw this link before , and i have tried it but its not working

Ravi Patel · Answer

Hi , refer the bellow link http://stackoverflow.com/questions/5310609/dropdownlist-validation-in-asp-net-using-required-field-validator http://www.aspsnippets.com/Articles/Validate-Check-HTML-Select-DropDownList-using-JavaScript-and-jQuery.aspx

dropdown list validation

Answers (6)