着急操作数据库为啥老提示这个有关问题

        Dim conn As SqlConnection        Dim cmd As SqlCommand        Dim cmdstring As String = "Insert Order (Name,Goods,_End,_Start,Number,Volume,BoxClass,Tel1,Tel2,Email,Company,Time) values('" & TextBox14.Text.ToString & "','" & TextBox18.Text.ToString & "','" & TextBox12.Text.ToString & "','" & TextBox11.Text.ToString & "','" & TextBox19.Text.ToString & "','" & TextBox8.Text.ToString & "','" & DropDownList3.SelectedValue.ToString & "','" & TextBox15.Text.ToString & "','" & TextBox17.Text.ToString & "','" & TextBox16.Text.ToString & "','" & TextBox13.Text.ToString & "','" & TextBox9.Text.ToString & "')"        conn = New SqlConnection("Data source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\Database.mdf;Integrated Security=True;User Instance=True")        cmd = New SqlCommand(cmdstring, conn)        conn.Open()        cmd.ExecuteNonQuery()        conn.Close()