Question

I have this dropdownlist populated and everything. The only problem is that whenever I add a new item in the database through my website, the dropdownlist doesn’t update for some reason.

private CurrentUser _cu = new CurrentUser();//just to check if use is an admin or not.

    protected void Page_Load(object sender, EventArgs e)
    {           
        _cu = (CurrentUser)Session[Common.SessVariables.CurUser];
        if (!_cu.CanReport) { Response.Redirect("~/default.aspx"); }

        CurrentUser cu = (CurrentUser)Session[Common.SessVariables.CurUser];
        if (!IsPostBack)
        {
            foreach (PrefixAdd loc in cu.Prefix)//Prefix is a Property
            {
                ListItem x = new ListItem(loc.Prefix);
                PrefixID.Items.Add(x);
            }
        }

    }

@Wayne I’m using a store procedure to just insert a Prefix like Pre,yes,sey, etc. Then the list is populated with prefixes.

StringBuilder sbSQL = new StringBuilder(255);
sbSQL.Append(string.Format("exec insPrefix @Prefix=N'{0}';", PrefixBox.Text.Trim()));
string msg = string.Empty;
msg = (_oDAW.ExecuteNonQuery(sbSQL.ToString())) ? string.Format(Common.GetAppSetting(Common.ConfigKeys.User_Submit_Success), 
PrefixBox.Text.Trim()) : Common.GetAppSetting(Common.ConfigKeys.SubmitFail); //this is a somewhat custom method for CS and databinding.

@ Yuriy Rozhovetskiy Yea I add new items to this page with the dropdownlist.

Answer 1

Whenever you add an item to your database, you have to rebind your drop down list.

yourDropDown.DataSource = //...
yourDropDown.DataBind();

That is, DropDownLists (and other controls) have no way of knowing that their data has changed behind the scenes, they can’t automatically detect it. You have to tell the controls to rebind their data manually.

Good job on the Page_Load(...){ if !(IsPostback) part.