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 T P · 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