dropdown list validation

Minnu Merin Alex

10y1.9kLearn iOS Programming

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

6 Replies

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Bikesh Srivastava10y ago
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 Raj10y ago
Rajeesh Menoth10y ago
Hi,
First see the Dropdownlist
<asp:DropDownList ID="DropDownList1" runat="server" AppendDataBoundItems="True">
<asp:ListItem>--Select--asp:ListItem>
<asp:ListItem>Penasp:ListItem>
<asp:ListItem>Pencilasp:ListItem>
<asp:ListItem>Rubberasp: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
Midhun Tp10y ago
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 Alex10y ago
i saw this link before , and i have tried it but its not working
Ravi Patel10y ago
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