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If statement on dropDownList listItem

Anonymous User 2365 20 Nov 2014

I need to add a condition to a DropDownList where a method can be executed by button click only if the user has selected a value different than the listItem (default value).

<asp:DropDownList ID="DropDownList1" runat="server" AppendDataBoundItems="True"
    
DataSourceID="SqlDataSource5" DataTextField="proj_name"
DataValueField="proj_name">
       
<asp:ListItem Text="Select a project to clone" Value="" />
</asp:DropDownList>

How can I structure an if condition to validate that the selected value is not the ListItem (default value)?

Anonymous User

Other

I am a content writter !

1 Answers

Sumit Kesarwani 20 Nov 2014

You can use asp.net delivered validation controls

<asp:RequiredFieldValidator id="rfv1"  ControlToValidate="DropDownList1"   Display="Static"
                   
ErrorMessage="* Select a value"   InitialValue="DefaultValueHere"     runat="server"
                   
ValidationGroup="V1"/>

Then edit your button markup to use ValidationGroup

<asp:Button Id="button1" ValidationGroup="V1" .../>

In your codebehind button click code add this

protected void button1_onlick(Object sender, EventArgs e)
{
     If(Page.IsValid)
     {
       // your existing code here
     }
}

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