Provides contextual information about the trigger that was fired.
Assembly: System.Data (in System.Data.dll)
Determines whether the specified object is equal to the current object.(Inherited from Object.)
Serves as the default hash function. (Inherited from Object.)
Returns true if a column was affected by an INSERT or UPDATE statement.
Returns a string that represents the current object.(Inherited from Object.)
The contextual information provided includes the type of action that caused the trigger to fire, which columns were modified in an UPDATE operation, and, in the case of a data definition language (DDL) trigger, an XML EventData structure (see "Transact-SQL Reference" in SQL Server Books Online) that describes the triggering operation.
The following example shows a Insert action occurred. If a row was inserted into the user's table, the user name and real name are retrieved from the inserted row and then added to the UserNameAudit table.object being used to determine if an
<SqlTrigger(Name:="UsersAudit", Target:="[dbo].[users]", Event:="FOR INSERT")> _ Public Shared Sub UsersAudit() Dim command As SqlCommand Dim triggContext As SqlTriggerContext Dim reader As SqlDataReader Dim userName As String Dim realName As String ' Get the trigger context. triggContext = SqlContext.TriggerContext Select Case triggContext.TriggerAction Case TriggerAction.Insert ' Retrieve the connection that the trigger is using. Using connection As New SqlConnection("context connection=true") connection.Open() ' Get the inserted row. command = new SqlCommand("SELECT * FROM INSERTED;", connection) ' Get the user name and real name of the inserted user. reader = command.ExecuteReader() reader.Read() userName = CType(reader(0), String) realName = CType(reader(1), String) reader.Close() ' Insert the user name and real name into the auditing table. command = New SqlCommand("INSERT [dbo].[UserNameAudit] (userName, realName) " & _ "VALUES (@userName, @realName);", connection) command.Parameters.Add(new SqlParameter("@userName", userName)) command.Parameters.Add(new SqlParameter("@realName", realName)) command.ExecuteNonQuery() End Using End Select End Sub
Available since 2.0
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.