SqlDataAdapter.RowUpdating Event

Definition

Occurs during Update(DataSet) before a command is executed against the data source. The attempt to update is made, so the event fires.

C#
public event System.Data.SqlClient.SqlRowUpdatingEventHandler RowUpdating;
C#
[System.Data.DataSysDescription("DbDataAdapter_RowUpdating")]
public event System.Data.SqlClient.SqlRowUpdatingEventHandler RowUpdating;

Event Type

Attributes

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)

C#
// 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 connectionString =
              "Integrated Security=SSPI;database=Northwind;server=MSSQL1";
    const string queryString = "SELECT * FROM Products";

    // create DataAdapter
    SqlDataAdapter adapter = new SqlDataAdapter(queryString, connectionString);
    SqlCommandBuilder builder = new SqlCommandBuilder(adapter);

    // Create and fill DataSet (select only first 5 rows)
    DataSet dataSet = new DataSet();
    adapter.Fill(dataSet, 0, 5, "Table");

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

    // add handlers
    adapter.RowUpdating += new SqlRowUpdatingEventHandler( OnRowUpdating );
    adapter.RowUpdated += new SqlRowUpdatedEventHandler( OnRowUpdated );

    // update, this operation fires two events
    // (RowUpdating/RowUpdated) per changed row
    adapter.Update(dataSet, "Table");

    // remove handlers
    adapter.RowUpdating -= new SqlRowUpdatingEventHandler( OnRowUpdating );
    adapter.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 + ")");
}

Remarks

When using Update, there are two events that occur per 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, 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.

Applies to

Product Versions
.NET 6 (package-provided), 7 (package-provided), 8 (package-provided), 9 (package-provided)
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7 (package-provided), 4.7, 4.7.1 (package-provided), 4.7.1, 4.7.2 (package-provided), 4.7.2, 4.8 (package-provided), 4.8, 4.8.1
.NET Standard 2.0 (package-provided)

See also