CODEWITHSUNDEEP
asp.net
vamsikiran kolla
vamsikiran kolla

Reputation: 71

Static Dropdown items in asp.net

I searched a lot but nothing realy helped me. I am beginner and please bear any ignorance

I have a dropdown list in my aspx page. The source of the dropdown is from a sqlsource that I have it in my code behind file. I wanted to add a static item to the top of the dropdown and I was able to add it with below line

reportparameter.Items.Insert(0, "-------SELECT----------");

how do I set a required field validator on this dropdown with the first value from the code behind. I tried different things and I get an conversion error whenever i submit the page.

Upvotes: 1

Views: 6560

Answers (1)

Tim Schmelter
Tim Schmelter

Reputation: 460158

I assume that reportparameter is the DropDownList.

You can use the AppendDataBoundItems property to tell ASP.NET that the DataSource should be appended to the "static" item(s).

You can use the RequiredFieldValidator's InitalValue property to tell it that this counts as not selcted. In your casse you need to set it to 0.

<asp:DropDownList id="reportparameter"
                AppendDataBoundItems="True"
                runat="server">
              <asp:ListItem Selected="True" Value="0">-------SELECT----------</asp:ListItem>
           </asp:DropDownList>
<asp:RequiredFieldValidator id="RequiredFieldValidator1" 
       InitialValue="0" 
       ControlToValidate="reportparameter"
       ErrorMessage="Required field!"
       runat="server"/>

Upvotes: 5

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