Class ExceptionManager

Provides a global hook for exceptions that have been cached inside the framework and gives you the option to provide specialized handling of the exception. You can also temporarily suspend and resume caching exceptions.

Inheritance

System.Object

ExceptionManager

Inherited Members

System.Object.ToString()

System.Object.Equals(System.Object)

System.Object.Equals(System.Object, System.Object)

System.Object.ReferenceEquals(System.Object, System.Object)

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

Namespace: Syncfusion.Windows.Forms

Assembly: Syncfusion.Shared.Base.dll

Syntax

public class ExceptionManager

Remarks

The Syncfusion framework notifies ExceptionManager about exceptions that are cached by calling RaiseExceptionCatched(Object, Exception) or ExceptionManager.

The RaiseExceptionCatched(Object, Exception) method will raise the ExceptionCatched event. By handling the ExceptionCatched event, your code can analyze the exception that was cached and optionally let it bubble up by rethrowing the exception.

Your code can also temporarily suspend and resume caching exceptions. This is useful if you want to provide your own exception handling. Just call SuspendCatchExceptions() to disable handling exceptions and ResumeCatchExceptions() to resume caching exceptions.

You also have the options to disable caching exceptions altogether by setting PassThroughExceptions to True.

Note: All static settings for this class are thread local.

Examples

            // The following example demonstrates temporarily suspending exception caching when calling a base class version
            // of a method.
                    protected override void OnMouseDown(MouseEventArgs e)
                        {
                        ExceptionManager.SuspendCatchExceptions();
                        try
                        {
                            base.OnMouseDown(e);
                            ExceptionManager.ResumeCatchExceptions();
                        }
                        catch (Exception ex)
                        {
                            ExceptionManager.ResumeCatchExceptions();
                                // Notify exception manager about the catched exception and
                                // give it a chance to optionally rethrow the exception if necessary
                                // (e.g. if this OnMouseDown was called from another class that
                                // wants to provide its own exception handling).
                            if (!ExceptionManager.RaiseExceptionCatched(this, ex))
            					throw ex;
                            // handle exception here
                            MessageBox.Show(ex.ToString());
                        }
                    }

            // This code sample shows how exceptions are handled within the framework:
                            try
                            {
                                CurrentCell.Refresh();
                            }
                            catch (Exception ex)
                            {
                                TraceUtil.TraceExceptionCatched(ex);
                                if (!ExceptionManager.RaiseExceptionCatched(this, ex))
            						throw ex;
                            }

Constructors

ExceptionManager()

Declaration

public ExceptionManager()

Properties

PassThroughExceptions

Lets you disable caching exceptions altogether by setting PassThroughExceptions to True.

Declaration

public static bool PassThroughExceptions { get; set; }

Property Value

Type	Description
System.Boolean

Methods

RaiseExceptionCatched(Object, ExceptionCatchedEventArgs)

Raises the ExceptionCatched event. If caching exceptions has been disabled by a SuspendCatchExceptions() call or if PassThroughExceptions has been set to True, the exception is rethrown.

Declaration

public static bool RaiseExceptionCatched(object sender, ExceptionCatchedEventArgs e)

Parameters

Type	Name	Description
System.Object	sender
ExceptionCatchedEventArgs	e	A ExceptionCatchedEventArgs that contains the event data.

Returns

Type	Description
System.Boolean

RaiseExceptionCatched(Object, Exception)

Raises the ExceptionCatched event. If caching exceptions has been disabled by a SuspendCatchExceptions() call or if PassThroughExceptions has been set to True, the exception is rethrown.

Declaration

public static bool RaiseExceptionCatched(object sender, Exception ex)

Parameters

Type	Name	Description
System.Object	sender
System.Exception	ex	A System.Exception that was cached.

Returns

Type	Description
System.Boolean

ResumeCatchExceptions()

Temporarily resumes caching exceptions.

Declaration

public static void ResumeCatchExceptions()

ShouldCatchExceptions()

Indicates whether exceptions should be cached or if they should bubble up. RaiseExceptionCatched(Object, ExceptionCatchedEventArgs) calls this method.

Declaration

public static bool ShouldCatchExceptions()

Returns

Type	Description
System.Boolean

SuspendCatchExceptions()

Temporarily suspends caching exceptions.

Declaration

public static void SuspendCatchExceptions()

Events

ExceptionCatched

Occurs when an exception was cached within the framework and ExceptionManager was notified.

Declaration

public static event ExceptionCatchedEventHandler ExceptionCatched

Event Type

Type	Description
ExceptionCatchedEventHandler