SqlRowUpdatedEventArgs 类

定义

提供事件的数据 RowUpdated

public ref class SqlRowUpdatedEventArgs sealed : System::Data::Common::RowUpdatedEventArgs
public sealed class SqlRowUpdatedEventArgs : System.Data.Common.RowUpdatedEventArgs
type SqlRowUpdatedEventArgs = class
    inherit RowUpdatedEventArgs
Public NotInheritable Class SqlRowUpdatedEventArgs
Inherits RowUpdatedEventArgs
继承
SqlRowUpdatedEventArgs

示例

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

RowUpdating 事件返回以下输出:

事件参数:(command=System.Data.SqlClient.SqlCommand commandType=2 status=0)

RowUpdated 事件返回以下输出:

事件参数:(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 connectionString = "...";
    const string queryString = "SELECT * FROM Products";

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

    // Create and fill DataSet (select only first 5 rows)
    DataSet dataSet = new();
    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 + ")");
}
    ' 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

    Public Overloads Shared Function Main(args() As String) As Integer
        Const connectionString As String = "..."
        Const queryString As String = "SELECT * FROM Products"

        ' create DataAdapter
        Dim adapter As New SqlDataAdapter(queryString, connectionString)
        Dim builder As New SqlCommandBuilder(adapter)

        ' Create and fill DataSet (select only first 5 rows)
        Dim dataSet As New DataSet()
        adapter.Fill(dataSet, 0, 5, "Table")

        ' Modify DataSet
        Dim table As DataTable = dataSet.Tables("Table")
        table.Rows(0)(1) = "new product"

        ' add handlers
        AddHandler adapter.RowUpdating, AddressOf OnRowUpdating
        AddHandler adapter.RowUpdated, AddressOf OnRowUpdated

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

        ' remove handlers
        RemoveHandler adapter.RowUpdating, AddressOf OnRowUpdating
        RemoveHandler adapter.RowUpdated, AddressOf OnRowUpdated
        Return 0
    End Function


    Private Overloads 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


    Private Overloads 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
End Class

注解

完成 RowUpdated 行时 Update 将引发该事件。

使用 Update时,每个更新的数据行都会发生两个事件。 执行顺序如下所示:

  1. DataRow 中的值将移动到参数值。

  2. 引发 OnRowUpdating 事件。

  3. 该命令执行。

  4. 如果命令设置为 FirstReturnedRecord,并且第一个返回的结果将放在该命令中 DataRow

  5. 如果有输出参数,则它们放置在 DataRow中。

  6. 引发 OnRowUpdated 事件。

  7. 调用 AcceptChanges

构造函数

名称 说明
SqlRowUpdatedEventArgs(DataRow, IDbCommand, StatementType, DataTableMapping)

初始化 SqlRowUpdatedEventArgs 类的新实例。

属性

名称 说明
Command

获取或设置 SqlCommand 调用时 Update(DataSet) 执行的。

Errors

获取执行 Command 时.NET数据提供程序生成的任何错误。

(继承自 RowUpdatedEventArgs)
RecordsAffected

获取通过执行 SQL 语句更改、插入或删除的行数。

(继承自 RowUpdatedEventArgs)
Row

DataRow获取通过一个 Update(DataSet).

(继承自 RowUpdatedEventArgs)
RowCount

获取在一批更新的记录中处理的行数。

(继承自 RowUpdatedEventArgs)
StatementType

获取执行的 SQL 语句的类型。

(继承自 RowUpdatedEventArgs)
Status

UpdateStatus Command获取属性。

(继承自 RowUpdatedEventArgs)
TableMapping

DataTableMapping获取通过一个 Update(DataSet).

(继承自 RowUpdatedEventArgs)

方法

名称 说明
CopyToRows(DataRow[], Int32)

将对修改后的行的引用复制到提供的数组中。

(继承自 RowUpdatedEventArgs)
CopyToRows(DataRow[])

将对修改后的行的引用复制到提供的数组中。

(继承自 RowUpdatedEventArgs)
Equals(Object)

确定指定的对象是否等于当前对象。

(继承自 Object)
GetHashCode()

用作默认哈希函数。

(继承自 Object)
GetType()

获取当前实例的 Type

(继承自 Object)
MemberwiseClone()

创建当前 Object的浅表副本。

(继承自 Object)
ToString()

返回一个表示当前对象的字符串。

(继承自 Object)

适用于

另请参阅