LinqDataSourceValidationException Class

.NET Framework (current version)
 

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

Namespace:   System.Web.UI.WebControls
Assembly:  System.Web.Extensions (in System.Web.Extensions.dll)

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

C#
C++
F#
VB
Copy 
[<SerializableAttribute>]
type LinqDataSourceValidationException = 
    class
        inherit Exception
        interface IDynamicValidatorException
        interface ISerializable
    end

NameDescription
System_CAPS_pubmethodLinqDataSourceValidationException()

Initializes a new instance of the LinqDataSourceValidationException class with a system-supplied message that describes the error.

System_CAPS_protmethodLinqDataSourceValidationException(SerializationInfo, StreamingContext)

Initializes a new instance of the LinqDataSourceValidationException class with serialized data.

System_CAPS_pubmethodLinqDataSourceValidationException(String)

Initializes a new instance of the LinqDataSourceValidationException class with a specified message that describes the error.

System_CAPS_pubmethodLinqDataSourceValidationException(String, Exception)

Initializes a new instance of the LinqDataSourceValidationException class with a specified error message and a reference to the inner exception.

System_CAPS_pubmethodLinqDataSourceValidationException(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.

NameDescription
System_CAPS_pubpropertyData

Gets a collection of key/value pairs that provide additional user-defined information about the exception.(Inherited from Exception.)

System_CAPS_pubpropertyHelpLink

Gets or sets a link to the help file associated with this exception.(Inherited from Exception.)

System_CAPS_pubpropertyHResult

Gets or sets HRESULT, a coded numerical value that is assigned to a specific exception.(Inherited from Exception.)

System_CAPS_pubpropertyInnerException

Gets the Exception instance that caused the current exception.(Inherited from Exception.)

System_CAPS_pubpropertyInnerExceptions

Gets one or more exceptions that occurred when new or modified data was being validated.

System_CAPS_pubpropertyMessage

Gets a message that describes the current exception.(Inherited from Exception.)

System_CAPS_pubpropertySource

Gets or sets the name of the application or the object that causes the error.(Inherited from Exception.)

System_CAPS_pubpropertyStackTrace

Gets a string representation of the immediate frames on the call stack.(Inherited from Exception.)

System_CAPS_pubpropertyTargetSite

Gets the method that throws the current exception.(Inherited from Exception.)

NameDescription
System_CAPS_pubmethodEquals(Object)

Determines whether the specified object is equal to the current object.(Inherited from Object.)

System_CAPS_protmethodFinalize()

Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)

System_CAPS_pubmethodGetBaseException()

When overridden in a derived class, returns the Exception that is the root cause of one or more subsequent exceptions.(Inherited from Exception.)

System_CAPS_pubmethodGetHashCode()

Serves as the default hash function. (Inherited from Object.)

System_CAPS_pubmethodGetObjectData(SerializationInfo, StreamingContext)

Gets information about the exception and adds it to the SerializationInfo object.(Overrides Exception.GetObjectData(SerializationInfo, StreamingContext).)

System_CAPS_pubmethodGetType()

Gets the runtime type of the current instance.(Inherited from Exception.)

System_CAPS_protmethodMemberwiseClone()

Creates a shallow copy of the current Object.(Inherited from Object.)

System_CAPS_pubmethodToString()

Creates and returns a string representation of the current exception.(Inherited from Exception.)

NameDescription
System_CAPS_proteventSerializeObjectState

Occurs when an exception is serialized to create an exception state object that contains serialized data about the exception.(Inherited from Exception.)

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.

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

VB
Copy 
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#]

Copy 
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;
    }
}

.NET Framework
Available since 3.5

Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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