Question

I have a DropDownList.

I need populate it with item collected in a List<ListItem>.

In my script, collector has been populated properly.

But I cannot populate the DropDownList. I receive an error:

DataBinding: 'System.Web.UI.WebControls.ListItem' does not contain a property with the name 'UserName'."}

---

<asp:DropDownList ID="uxListUsers" runat="server" DataTextField="UserName" 
DataValueField="UserId">

---

List<ListItem> myListUsersInRoles = new List<ListItem>();
foreach (aspnet_Users myUser in context.aspnet_Users)
{
    // Use of navigation Property EntitySet
    if (myUser.aspnet_Roles.Any(r => r.RoleName == "CMS-AUTHOR" || r.RoleName == "CMS-EDITOR"))
        myListUsersInRoles.Add(new ListItem(myUser.UserName.ToString(), myUser.UserId.ToString()));
}
uxListUsers.DataSource = myListUsersInRoles; // MAYBE PROBLEM HERE????
uxListUsers.DataBind();

Any ideas? Thanks

Answer 1

When you init the listItem Object you actually init the properties (text,value)

EX ( new ListItem(myUser.User (Text PROPERTY), myUser.UserId.ToString() (Value PROPERTY) )

try to bind that with

    <asp:DropDownList ID="uxListUsers" runat="server" DataTextField="Text" 
DataValueField="Value">    

the dropdown will take the Text and Value Properties which store in the ListItem Object

and show it in the user interface