SqlRowUpdatingEventArgs Class

Definition

Namespace:

System.Data.SqlClient

Assembly:

System.Data.dll

Provides data for the RowUpdating event.

public ref class SqlRowUpdatingEventArgs sealed : System::Data::Common::RowUpdatingEventArgs

public sealed class SqlRowUpdatingEventArgs : System.Data.Common.RowUpdatingEventArgs

type SqlRowUpdatingEventArgs = class
    inherit RowUpdatingEventArgs

Public NotInheritable Class SqlRowUpdatingEventArgs
Inherits RowUpdatingEventArgs

Inheritance

Object

EventArgs

RowUpdatingEventArgs

SqlRowUpdatingEventArgs

Examples

The following example shows how to use both the RowUpdating and RowUpdated events.

The RowUpdating event returns this output:

event args: (command=System.Data.SqlClient.SQLCommand commandType=2 status=0)

The RowUpdated event returns this output:

event args: (command=System.Data.SqlClient.SQLCommand commandType=2 recordsAffected=1 row=System.Data.DataRow[37] status=0)

// handler for RowUpdating event
private static void OnRowUpdating(object sender, SqlRowUpdatingEventArgs e)
{
    PrintEventArgs(e);
}

//Handler for RowUpdated event.
private static void OnRowUpdated(object sender, SqlRowUpdatedEventArgs e)
{
    PrintEventArgs(e);
}

public static int Main()
{
    const string CONNECTION_STRING = "Persist Security Info=False;Integrated Security=SSPI;database=northwind;server=mySQLServer";
    const string SELECT_ALL = "select * from Products";

    //Create DataAdapter.
    SqlDataAdapter rAdapter    = new SqlDataAdapter(SELECT_ALL, CONNECTION_STRING);

    //Create and fill DataSet (Select only first 5 rows.).
    DataSet rDataSet = new DataSet();
    rAdapter.Fill(rDataSet, 0, 5, "Table");

    //Modify DataSet.
    DataTable rTable = rDataSet.Tables["Table"];
    rTable.Rows[0][1] = "new product";

    //Add handlers.
    rAdapter.RowUpdating += new SqlRowUpdatingEventHandler( OnRowUpdating );
    rAdapter.RowUpdated += new SqlRowUpdatedEventHandler( OnRowUpdated );

    //Update--this operation fires two events (RowUpdating and RowUpdated) for each changed row.
    rAdapter.Update(rDataSet, "Table");

    //Remove handlers.
    rAdapter.RowUpdating -= new SqlRowUpdatingEventHandler( OnRowUpdating );
    rAdapter.RowUpdated -= new SqlRowUpdatedEventHandler( OnRowUpdated );
    return 0;
}

private static void PrintEventArgs(SqlRowUpdatingEventArgs args)
{
    Console.WriteLine("OnRowUpdating");
    Console.WriteLine("  event args: ("+
        " command=" + args.Command +
        " commandType=" + args.StatementType +
        " status=" + args.Status + ")");
}

private static void PrintEventArgs(SqlRowUpdatedEventArgs args)
{
    Console.WriteLine("OnRowUpdated");
    Console.WriteLine("  event args: ("+
        " command=" + args.Command +
        " commandType=" + args.StatementType +
        " recordsAffected=" + args.RecordsAffected +
        " status=" + args.Status + ")");
}

'Handler for RowUpdating event.
Private Shared Sub OnRowUpdating(sender As Object, e As SqlRowUpdatingEventArgs)
    PrintEventArgs(e)
End Sub 

'Handler for RowUpdated event.
Private Shared Sub OnRowUpdated(sender As Object, e As SqlRowUpdatedEventArgs)
    PrintEventArgs(e)
End Sub 

'Entry point which delegates to C-style main Private Function.
Public Overloads Shared Sub Main()
    System.Environment.ExitCode = Main(System.Environment.GetCommandLineArgs())
End Sub

Overloads Public Shared Function Main(args() As String) As Integer
    Const CONNECTION_STRING As String = "Persist Security Info=False;Integrated Security=SSPI;database=northwind;server=mySQLServer"
    Const SELECT_ALL As String = "select * from Products"
    
    'Create DataAdapter.
    Dim rAdapter As New SqlDataAdapter(SELECT_ALL, CONNECTION_STRING)
    
    'Create and fill DataSet (Select only first 5 rows.).
    Dim rDataSet As New DataSet()
    rAdapter.Fill(rDataSet, 0, 5, "Table")
    
    'Modify DataSet.
    Dim rTable As DataTable = rDataSet.Tables("Table")
    rTable.Rows(0)(1) = "new product"
    
    'Add handlers.
    AddHandler rAdapter.RowUpdating, AddressOf OnRowUpdating
    AddHandler rAdapter.RowUpdated, AddressOf OnRowUpdated
    
    'Update--this operation fires two events (RowUpdating and RowUpdated) for each changed row. 
    rAdapter.Update(rDataSet, "Table")
    
    'Remove handlers.
    RemoveHandler rAdapter.RowUpdating, AddressOf OnRowUpdating
    RemoveHandler rAdapter.RowUpdated, AddressOf OnRowUpdated
    Return 0
End Function 

Overloads Private Shared Sub PrintEventArgs(args As SqlRowUpdatingEventArgs)
    Console.WriteLine("OnRowUpdating")
    Console.WriteLine("  event args: (" & _
                    " command=" & _
                    args.Command.CommandText & _
                    " commandType=" & _
                    args.StatementType & _
                    " status=" & _
                    args.Status & _
                    ")")
End Sub 


Overloads Private Shared Sub PrintEventArgs(args As SqlRowUpdatedEventArgs)
    Console.WriteLine("OnRowUpdated")
    Console.WriteLine("  event args: (" & _
                    " command=" & _
                    args.Command.CommandText & _
                    " commandType=" & _
                    args.StatementType & _
                    " recordsAffected=" & _
                    args.RecordsAffected & _
                    " status=" & _
                    args.Status & _
                    ")")
End Sub

Remarks

The RowUpdating event is raised before an Update to a row.

When you are using Update, there are two events that occur for each data row updated. The order of execution is as follows:

1. The values in the DataRow are moved to the parameter values.

2. The OnRowUpdating event is raised.

3. The command executes.

4. If the command is set to FirstReturnedRecord, and the first returned result is placed in the DataRow.

5. If there are output parameters, they are placed in the DataRow.

6. The OnRowUpdated event is raised.

7. AcceptChanges is called.

Constructors

SqlRowUpdatingEventArgs(DataRow, IDbCommand, StatementType, DataTableMapping)

Initializes a new instance of the SqlRowUpdatingEventArgs class.

Properties

BaseCommand	Gets or sets the IDbCommand object for an instance of this class. (Inherited from RowUpdatingEventArgs)
Command	Gets or sets the SqlCommand to execute when performing the Update(DataSet).
Errors	Gets any errors generated by the .NET data provider when the Command executes. (Inherited from RowUpdatingEventArgs)
Row	Gets the DataRow that will be sent to the server as part of an insert, update, or delete operation. (Inherited from RowUpdatingEventArgs)
StatementType	Gets the type of SQL statement to execute. (Inherited from RowUpdatingEventArgs)
Status	Gets or sets the UpdateStatus of the Command property. (Inherited from RowUpdatingEventArgs)
TableMapping	Gets the DataTableMapping to send through the Update(DataSet). (Inherited from RowUpdatingEventArgs)

Methods

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)

See also

• ADO.NET Overview