ChangeConflictException Class
Definition
Thrown when an update fails because database values have been updated since the client last read them.
public ref class ChangeConflictException : Exception
public class ChangeConflictException : Exception
type ChangeConflictException = class
inherit Exception
Public Class ChangeConflictException
Inherits Exception
- Inheritance
Examples
Northwnd db = new Northwnd("...");
try
{
db.SubmitChanges(ConflictMode.ContinueOnConflict);
}
catch (ChangeConflictException e)
{
Console.WriteLine("Optimistic concurrency error.");
Console.WriteLine(e.Message);
foreach (ObjectChangeConflict occ in db.ChangeConflicts)
{
MetaTable metatable = db.Mapping.GetTable(occ.Object.GetType());
Customer entityInConflict = (Customer)occ.Object;
Console.WriteLine("Table name: {0}", metatable.TableName);
Console.Write("Customer ID: ");
Console.WriteLine(entityInConflict.CustomerID);
Console.ReadLine();
}
}
Dim db As New Northwnd("...")
Try
db.SubmitChanges(ConflictMode.ContinueOnConflict)
Catch ex As ChangeConflictException
Console.WriteLine("Optimistic concurrency error.")
Console.WriteLine(ex.Message)
For Each occ As ObjectChangeConflict In db.ChangeConflicts
Dim metatable As MetaTable = db.Mapping.GetTable(occ.Object.GetType())
Dim entityInConflict = occ.Object
Console.WriteLine("Table name: " & metatable.TableName)
Console.Write("Customer ID: ")
Console.WriteLine(entityInConflict.CustomerID)
Console.ReadLine()
Next
End Try
Remarks
The following example shows how this exception might be used for returning information about a concurrency conflict.
Constructors
ChangeConflictException() |
Initializes a new instance of the ChangeConflictException class. |
ChangeConflictException(String) |
Initializes a new instance of the ChangeConflictException class and specifies a message to explain the exception. |
ChangeConflictException(String, Exception) |
Initializes a new instance of the ChangeConflictException class, specifies a message to explain the exception, and specifies the exception that caused this exception. |
Properties
Data |
Gets a collection of key/value pairs that provide additional user-defined information about the exception. (Inherited from Exception) |
HelpLink |
Gets or sets a link to the help file associated with this exception. (Inherited from Exception) |
HResult |
Gets or sets HRESULT, a coded numerical value that is assigned to a specific exception. (Inherited from Exception) |
InnerException |
Gets the Exception instance that caused the current exception. (Inherited from Exception) |
Message |
Gets a message that describes the current exception. (Inherited from Exception) |
Source |
Gets or sets the name of the application or the object that causes the error. (Inherited from Exception) |
StackTrace |
Gets a string representation of the immediate frames on the call stack. (Inherited from Exception) |
TargetSite |
Gets the method that throws the current exception. (Inherited from Exception) |
Methods
Equals(Object) |
Determines whether the specified object is equal to the current object. (Inherited from Object) |
GetBaseException() |
When overridden in a derived class, returns the Exception that is the root cause of one or more subsequent exceptions. (Inherited from Exception) |
GetHashCode() |
Serves as the default hash function. (Inherited from Object) |
GetObjectData(SerializationInfo, StreamingContext) |
When overridden in a derived class, sets the SerializationInfo with information about the exception. (Inherited from Exception) |
GetType() |
Gets the runtime type of the current instance. (Inherited from Exception) |
MemberwiseClone() |
Creates a shallow copy of the current Object. (Inherited from Object) |
ToString() |
Creates and returns a string representation of the current exception. (Inherited from Exception) |
Events
SerializeObjectState |
Occurs when an exception is serialized to create an exception state object that contains serialized data about the exception. (Inherited from Exception) |