LinqDataSourceValidationException Class

Definition

Namespace:

System.Web.UI.WebControls

Assembly:

System.Web.Extensions.dll

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

public ref class LinqDataSourceValidationException : Exception, System::Web::DynamicData::IDynamicValidatorException

[System.Serializable]
public class LinqDataSourceValidationException : Exception, System.Web.DynamicData.IDynamicValidatorException

[<System.Serializable>]
type LinqDataSourceValidationException = class
    inherit Exception
    interface IDynamicValidatorException
    interface ISerializable

Public Class LinqDataSourceValidationException
Inherits Exception
Implements IDynamicValidatorException

Inheritance

Object

Exception

LinqDataSourceValidationException

Attributes

SerializableAttribute

Implements

ISerializable IDynamicValidatorException

Examples

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

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  

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;  
    }  
}  

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.

Constructors

LinqDataSourceValidationException()	Initializes a new instance of the LinqDataSourceValidationException class with a system-supplied message that describes the error.
LinqDataSourceValidationException(SerializationInfo, StreamingContext)	Initializes a new instance of the LinqDataSourceValidationException class with serialized data.
LinqDataSourceValidationException(String)	Initializes a new instance of the LinqDataSourceValidationException class with a specified message that describes the error.
LinqDataSourceValidationException(String, Exception)	Initializes a new instance of the LinqDataSourceValidationException class with a specified error message and a reference to the inner exception.
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.

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)
InnerExceptions	Gets one or more exceptions that occurred when new or modified data was being validated.
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)	Gets information about the exception and adds it to the SerializationInfo object.
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)