protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { MembershipUser CurrentUser = Membership.GetUser(); if (CurrentUser == null) { Response.Redirect($"~/Pages/Common/MainLogin.aspx"); } Guid UserId = (Guid)((Membership.GetUser()).ProviderUserKey); DataTable dt = ConnectionBLL.GetUserConnections(UserId); gv_ShowConnections.DataSource = dt; gv_ShowConnections.DataKeyNames = new string[] { "friendId" }; gv_ShowConnections.DataBind(); //dt.PrimaryKey = new DataColumn[] { dt.Columns["friendId"] }; } }