CODEWITHSUNDEEP
c#asp.net
1392023093user
1392023093user

Reputation: 1096

Set value of DropDownList in ASP.NET

How to set value of drop down list, using variable from code behind? 

<asp:DropDownList  runat="server"                    
    <asp:ListItem Text="SomeText" Value='<%: valudeCodeBehind %>'></asp:ListItem>
</asp:DropDownList>

and I put calculate string in code behind, lets say it is valudeCodeBehind ="113";

But I am getting <%: valudeCodeBehind %> this value instead of 113. So how to pass it.

edit: Value="<%= valudeCodeBehind %>" doesnt work either. And it is not a typo (someone put that in comments)..

Upvotes: 2

Views: 1201

Answers (4)

Khazratbek
Khazratbek

Reputation: 1656

<asp:DropDownList  runat="server"                    
    <asp:ListItem Text="SomeText" Value='<% FunctionFromCodeBehind(); %>'>
    </asp:ListItem>
</asp:DropDownList>

And code behind:

private Int32 FunctionFromCodeBehind()
{
    int result = 0;
    //calculations here
    return result;
}

Upvotes: 0

mattfei
mattfei

Reputation: 508

That won't work. You may want to try expression builder. Here is a good article about it.

Upvotes: 0

NKD
NKD

Reputation: 1049

Or calling the method like this...

CodeBehind

public DataTable GetString()
{
    //... do what you have to do here
}

ASPX

<asp:DropDownList ID="ddlString" DataSource='<%# GetString() %>'
 DataTextField="MyString"  DataValueField="StringID" runat="server">
</asp:DropDownList>

The Codebehind method should be public to access from ASPX page.

Upvotes: 0

genericHCU
genericHCU

Reputation: 4446

if you're already using codebehind to calculate values why not use something like

IdOfDDL.Items.Insert(0, New ListItem("someText", valudeCodeBhind))

in your codebehind without messing with <% %> and keep your view clean.

Upvotes: 3

Related Questions