Assembly: System.Web.Extensions (in System.Web.Extensions.dll)
Thetype exposes the following members.
|LinqDataSourceStatusEventArgs(Exception)||Initializes a new instance of the class by using an exception that occurred as a result of the data operation.|
|LinqDataSourceStatusEventArgs(Object)||Initializes a new instance of the class by using an object that contains the data from the data operation.|
|LinqDataSourceStatusEventArgs(Object, Int32)||Initializes a new instance of the class with an object that contains the data from the data operation and the number of rows returned.|
|Exception||Gets the exception that was thrown during the data operation.|
|ExceptionHandled||Gets or sets a value that indicates whether the exception was handled and that it should not be thrown again.|
|Result||Gets the object that represents the result of a data operation.|
|TotalRowCount||Gets the total number of rows in a data set from a data-retrieval operation.|
|Equals(Object)||Determines whether the specified object is equal to the current object. (Inherited from Object.)|
|GetHashCode||Serves as the default hash function. (Inherited from Object.)|
|GetType||Gets the Type of the current instance. (Inherited from Object.)|
|MemberwiseClone||Creates a shallow copy of the current Object. (Inherited from Object.)|
|ToString||Returns a string that represents the current object. (Inherited from Object.)|
The class enables you to examine the results of data operations that have been performed by a LinqDataSource control. A object is passed to event handlers for the ContextCreated, Deleted, Inserted, Selected, and Updated events of the LinqDataSource control.
If the data operation completed successfully, the resulting data object is stored in the Result property and the Exception property is Nothing. If the data operation failed, the exception that occurred during the data operation is stored in the Exception property and the Result property is Nothing. If you handled the exception represented by the Exception property, set the ExceptionHandled property to true so that the exception will not be thrown.
You retrieve the total number of data records returned from a query through the TotalRowCount property.
The following example shows an event handler for the Inserted event. In the event handler, if the Exception property is Nothing, the product ID is retrieved from the object in the Result property. The product ID is a primary key for the table and is set by the database, therefore the value is not known until the insert operation has finished. The exception message is logged if the Exception property is not equal to Nothing. The ExceptionHandled property is then set to true.
Protected Sub LinqDataSource_Inserted(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.LinqDataSourceStatusEventArgs) If (IsNothing(e.Exception)) Then Dim newProduct As Product newProduct = CType(e.Result, Product) Literal1.Text = "The new product id is " & newProduct.ProductID Literal1.Visible = True Else LogError(e.Exception.Message) Literal1.Text = "We are sorry. There was a problem saving the record. The administrator has been notified." Literal1.Visible = True e.ExceptionHandled = True End If End Sub