c#

GridView must be placed inside a form tag with runat=”server” even after the GridView is within a form tag

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<form runat="server" id="f1"> <div runat="server" id="d"> grid view: <asp:GridView runat="server" ID="g"> </asp:GridView> </div> <asp:TextBox runat="server" ID="t" TextMode="MultiLine" Rows="20" Columns="50"></asp:TextBox> </form> Code behind: public partial class ScriptTest : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { g.DataSource = new string[] { "a", "b", "c" }; g.DataBind(); TextWriter tw = new StringWriter(); HtmlTextWriter h = new … Read more

entity object cannot be referenced by multiple instances of IEntityChangeTracker. while adding related objects to entity in Entity Framework 4.1

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I am trying to save Employee details, which has references with City. But everytime I try to save my contact, which is validated I get the exception “ADO.Net Entity Framework An entity object cannot be referenced by multiple instances of IEntityChangeTracker”