LinqDataSourceValidationException Class (System.Web.UI.WebControls)

Switch View :
Classic
Lightweight
ScriptFree
.NET Framework Class Library
LinqDataSourceValidationException Class

Describes an exception that occurred during validation of new or modified values before values are inserted, updated, or deleted by a LinqDataSource control.

Inheritance Hierarchy
System.Object
  System.Exception
    System.Web.UI.WebControls.LinqDataSourceValidationException

Namespace:  System.Web.UI.WebControls
Assembly:  System.Web.Extensions (in System.Web.Extensions.dll)
Syntax
Visual Basic
<SerializableAttribute> _
Public Class LinqDataSourceValidationException _
	Inherits Exception _
	Implements IDynamicValidatorException, ISerializable
C#
[SerializableAttribute]
public class LinqDataSourceValidationException : Exception, 
	IDynamicValidatorException, ISerializable
Visual C++
[SerializableAttribute]
public ref class LinqDataSourceValidationException : public Exception, 
	IDynamicValidatorException, ISerializable
F#
[<SerializableAttribute>]
type LinqDataSourceValidationException =  
    class
        inherit Exception
        interface IDynamicValidatorException
        interface ISerializable
    end

The LinqDataSourceValidationException type exposes the following members.

Constructors
  Name Description
Public method LinqDataSourceValidationException() Initializes a new instance of the LinqDataSourceValidationException class with a system-supplied message that describes the error.
Public method LinqDataSourceValidationException(String) Initializes a new instance of the LinqDataSourceValidationException class with a specified message that describes the error.
Protected method LinqDataSourceValidationException(SerializationInfo, StreamingContext) Initializes a new instance of the LinqDataSourceValidationException class with serialized data.
Public method LinqDataSourceValidationException(String, IDictionary<String, Exception>) Initializes a new instance of the LinqDataSourceValidationException class with a specified message that describes the error, and a collection of references to inner exceptions.
Public method LinqDataSourceValidationException(String, Exception) Initializes a new instance of the LinqDataSourceValidationException class with a specified error message and a reference to the inner exception.
Top
Properties
  Name Description
Public property Data Gets a collection of key/value pairs that provide additional user-defined information about the exception. (Inherited from Exception.)
Public property HelpLink Gets or sets a link to the help file associated with this exception. (Inherited from Exception.)
Protected property HResult Gets or sets HRESULT, a coded numerical value that is assigned to a specific exception. (Inherited from Exception.)
Public property InnerException Gets the Exception instance that caused the current exception. (Inherited from Exception.)
Public property InnerExceptions Gets one or more exceptions that occurred when new or modified data was being validated.
Public property Message Gets a message that describes the current exception. (Inherited from Exception.)
Public property Source Gets or sets the name of the application or the object that causes the error. (Inherited from Exception.)
Public property StackTrace Gets a string representation of the immediate frames on the call stack. (Inherited from Exception.)
Public property TargetSite Gets the method that throws the current exception. (Inherited from Exception.)
Top
Methods
  Name Description
Public method Equals(Object) Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected method Finalize Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public method GetBaseException When overridden in a derived class, returns the Exception that is the root cause of one or more subsequent exceptions. (Inherited from Exception.)
Public method GetHashCode Serves as a hash function for a particular type. (Inherited from Object.)
Public method GetObjectData Gets information about the exception and adds it to the SerializationInfo object. (Overrides Exception.GetObjectData(SerializationInfo, StreamingContext).)
Public method GetType Gets the runtime type of the current instance. (Inherited from Exception.)
Protected method MemberwiseClone Creates a shallow copy of the current Object. (Inherited from Object.)
Public method ToString Creates and returns a string representation of the current exception. (Inherited from Exception.)
Top
Events
  Name Description
Protected event SerializeObjectState Occurs when an exception is serialized to create an exception state object that contains serialized data about the exception. (Inherited from Exception.)
Top
Remarks

The LinqDataSourceValidationException class contains type conversion and property setter exceptions. All of the exceptions that are thrown during validation are contained in the InnerExceptions collection. You can retrieve each validation exception by iterating through the InnerExceptions collection.

You typically handle exceptions in the Updating, Deleting, and Inserting events. If a validation exception is thrown, the Exception property of the LinqDataSourceUpdateEventArgs, LinqDataSourceDeleteEventArgs, or LinqDataSourceInsertEventArgs object contains a LinqDataSourceValidationException object. If no exception is thrown, the Exception property contains null.

To handle validation exceptions, create a handler for the Updating, Deleting, or Inserting event. In the event handler, check whether the Exception property of the event argument class contains a value other than null. If the Exception property is not null, one or more validation exceptions were thrown and you can retrieve each validation exception in the InnerExceptions property.

A validation exception can occur if a value does not match the type of the property. For example, trying to update an integer property by using non-numeric characters causes a validation exception. A LINQ to SQL class can also contain customized validation criteria that make sure that the property contains a value that is within an expected range or pattern.

Examples

The following example shows an event handler for the Updating event. It displays any validation exception messages by using a Label control.

Visual Basic
Protected Sub LinqDataSource_Updating(ByVal sender As Object, _
        ByVal e As LinqDataSourceUpdateEventArgs)
    If (e.Exception IsNot Nothing) Then
        For Each innerException As KeyValuePair(Of String, Exception) _
               In e.Exception.InnerExceptions
            Label1.Text &= innerException.Key & ": " & _
                innerException.Value.Message & "<br />"
        Next
        e.ExceptionHandled = True
    End If
End Sub

[C#]

protected void LinqDataSource_Updating(object sender, 
        LinqDataSourceUpdateEventArgs e)
{
    if (e.Exception != null)
    {
        foreach (KeyValuePair<string, Exception> innerException in 
             e.Exception.InnerExceptions)
        {
        Label1.Text += innerException.Key + ": " + 
            innerException.Value.Message + "<br />";
        }
        e.ExceptionHandled = true;
    }
}
Version Information

.NET Framework

Supported in: 4, 3.5
Platforms

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
Thread Safety
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
See Also

Reference

System.Web.UI.WebControls Namespace