SqlDataAdapter.RowUpdated 事件

定义

在对数据源执行命令后的 Update(DataSet) 过程中发生。 尝试进行更新,因此激发了该事件。

public:
 event Microsoft::Data::SqlClient::SqlRowUpdatedEventHandler ^ RowUpdated;
public event Microsoft.Data.SqlClient.SqlRowUpdatedEventHandler RowUpdated;
member this.RowUpdated : Microsoft.Data.SqlClient.SqlRowUpdatedEventHandler 
Public Custom Event RowUpdated As SqlRowUpdatedEventHandler 

事件类型

示例

以下示例演示如何同时使用 RowUpdatingRowUpdated 事件。

事件 RowUpdating 返回以下输出:

event args: (command=Microsoft.Data.SqlClient.SqlCommand commandType=2 status=0)

事件 RowUpdated 返回以下输出:

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

using Microsoft.Data.SqlClient;
using System.Xml;
using System.Data.Common;
using System.Windows.Forms;

public class Form1 : Form
{
    private DataSet DataSet1;
    private DataGrid dataGrid1;

    // 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 * FROMProducts";

        // 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 + ")");
    }
}

注解

使用 Update时,每个更新的数据行都会发生两个事件。 执行顺序如下:

  1. 中的 DataRow 值将移动到参数值。

  2. 引发 OnRowUpdating 事件。

  3. 命令执行。

  4. 如果命令设置为 FirstReturnedRecord,则返回的第一个结果将放在 中 DataRow

  5. 如果有输出参数,则它们放置在 中 DataRow

  6. 引发 OnRowUpdated 事件。

  7. 调用 AcceptChanges

适用于