Question

I’m writing application, which connects to CRM using CRM SDK 4. In the first version, I’ve been using app.config file (section ‘connectionStrings’)

<connectionStrings>
  <add name="mycrm" connectionString="Authentication Type=Integrated; Server=http://ServerName/OrganizationName;"/>
</connectionStrings>

and (in code):

DataContext ctx = new DataContext("mycrm");

and it works fine. But now, application should let user to choose authentification type, type server name, user id, password, etc. I’ve created connection string, but I don’t know how to use it. DataContext and CrmConnection objects, AFAIK, has only constructors with connectionString name (from app.config file) as parameter. When I try to use my connectionString I get exception:

    System.ApplicationException was unhandled

Message=”Unable to load the connection string name ‘Authentication Type=Integrated; Server=http://ServerName/OrganizationName;'”
Source=”Microsoft.Xrm.Client”
StackTrace:
at Microsoft.Xrm.Client.CrmConnection.GetConnectionStringFrom(String connectionStringName)
at Microsoft.Xrm.Client.CrmConnection..ctor(String connectionStringName, String connectionString)
at Microsoft.Xrm.Client.CrmConnection..ctor(String connectionStringName)
at ARP.EstateExtensions.PaymentsUploader.MainWindows..ctor(String connectionString) in C:\Users\mrobaszynski\Desktop\PU\PaymentsUploader\MainWindows.xaml.cs:line 38
at ARP.EstateExtensions.PaymentsUploader.LoginWindow.bOK_Click(Object sender, RoutedEventArgs e) in C:\Users\mrobaszynski\Desktop\PU\PaymentsUploader\LoginWindow.xaml.cs:line 92
at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
at System.Windows.Controls.Button.OnClick()
at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
at System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)
at System.Windows.UIElement.OnMouseUpThunk(Object sender, MouseButtonEventArgs e)
at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
at System.Windows.Input.InputManager.ProcessStagingArea()
at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Boolean isSingleParameter)
at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
at System.Windows.Threading.Dispatcher.TranslateAndDispatchMessage(MSG& msg)
at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
at System.Windows.Application.RunInternal(Window window)
at PaymentsUploader.App.Main() in C:\Users\mrobaszynski\Desktop\PU\PaymentsUploader\obj\Release\App.g.cs:line 0
at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException: System.NullReferenceException
Message=”Object reference not set to an instance of an object.”
Source=”Microsoft.Xrm.Client”
StackTrace:
at Microsoft.Xrm.Client.CrmConnection.GetConnectionStringFrom(String connectionStringName)
InnerException:

Answer 1

No, the other post is wrong – do NOT use reflection. The proper way to do this would be to use CrmConnection.Parse(customConnectionString) to build a crm connection. You can then construct the data context with that connection in the constructor.

var crm = new XrmDataContext(CrmConnection.Parse(customConnectionString));

Shan McArthur

http://www.shanmcarthur.net