SqlDataSourceView.OnUpdated(SqlDataSourceStatusEventArgs) 方法

protected:
 virtual void OnUpdated(System::Web::UI::WebControls::SqlDataSourceStatusEventArgs ^ e);

protected virtual void OnUpdated(System.Web.UI.WebControls.SqlDataSourceStatusEventArgs e);

abstract member OnUpdated : System.Web.UI.WebControls.SqlDataSourceStatusEventArgs -> unit
override this.OnUpdated : System.Web.UI.WebControls.SqlDataSourceStatusEventArgs -> unit

Protected Overridable Sub OnUpdated (e As SqlDataSourceStatusEventArgs)

參數

範例

以下程式碼範例示範如何在控制項中顯示及更新從 ODBC 資料庫 GridView 取得的資料。 紀錄成功更新後， Updated 事件處理程序會執行後續處理步驟，發送電子郵件通知。

<%@Page  Language="C#" %>
<%@Import Namespace="System.Web.Mail" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

 private void OnDSUpdatedHandler(Object source, SqlDataSourceStatusEventArgs e) {
    if (e.AffectedRows > 0) {
        // Perform any additional processing, such as sending an email notification.
        Label1.Text = Request.LogonUserIdentity.Name +
            " changed user information successfully!";
    }
    else {
        Label1.Text = "No data updated!";
    }
 }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>ASP.NET Example</title>
</head>
<body>
    <!-- This example uses a Northwind database that is hosted by an ODBC-compliant
         database. To run this sample, create an ODBC DSN to any database that hosts
         the Northwind database, including Microsoft SQL Server or Microsoft Access,
         change the name of the DSN in the ConnectionString, and view the page.
    -->
    <form id="form1" runat="server">

      <asp:SqlDataSource
          id="SqlDataSource1"
          runat="server"
          ProviderName="System.Data.Odbc"
          DataSourceMode="DataSet"
          ConnectionString="dsn=myodbc3dsn;"
          SelectCommand="SELECT EmployeeID,FirstName,LastName,Title FROM Employees"
          UpdateCommand="Update Employees SET FirstName=?,LastName=?,Title=? WHERE EmployeeID=?"
          OnUpdated="OnDSUpdatedHandler">
      </asp:SqlDataSource>

      <asp:GridView
          id="GridView1"
          runat="server"
          AutoGenerateColumns="False"
          DataKeyNames="EmployeeID"
          AutoGenerateEditButton="True"
          DataSourceID="SqlDataSource1">
          <columns>
              <asp:BoundField HeaderText="First Name" DataField="FirstName" />
              <asp:BoundField HeaderText="Last Name" DataField="LastName" />
              <asp:BoundField HeaderText="Title" DataField="Title" />
          </columns>
      </asp:GridView>

      <asp:Label
          id="Label1"
          runat="server">
      </asp:Label>

    </form>
  </body>
</html>

<%@Page  Language="VB" %>
<%@Import Namespace="System.Web.Mail" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

 Sub OnDSUpdatedHandler(ByVal source As Object, ByVal e As SqlDataSourceStatusEventArgs)
    If e.AffectedRows > 0 Then
        ' Perform any additional processing, such as setting a status label.
        Label1.Text = Request.LogonUserIdentity.Name & _
            " changed user information successfully!"
    Else
        Label1.Text = "No data updated!"
    End If
 End Sub 'OnDSUpdatedHandler

</script>


<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>ASP.NET Example</title>
</head>
<body>
    <!-- This example uses a Northwind database that is hosted by an ODBC-compliant
         database. To run this sample, create an ODBC DSN to any database that hosts
         the Northwind database, including Microsoft SQL Server or Microsoft Access,
         change the name of the DSN in the ConnectionString, and view the page.
    -->
    <form id="form1" runat="server">

      <asp:SqlDataSource
          id="SqlDataSource1"
          runat="server"
          ProviderName="System.Data.Odbc"
          DataSourceMode="DataSet"
          ConnectionString="dsn=myodbc3dsn;"
          SelectCommand="SELECT EmployeeID,FirstName,LastName,Title FROM Employees"
          UpdateCommand="Update Employees SET FirstName=?,LastName=?,Title=? WHERE EmployeeID=?"
          OnUpdated="OnDSUpdatedHandler">
      </asp:SqlDataSource>

      <asp:GridView
          id="GridView1"
          runat="server"
          AutoGenerateColumns="False"
          DataKeyNames="EmployeeID"
          AutoGenerateEditButton="True"
          DataSourceID="SqlDataSource1">
          <columns>
              <asp:BoundField HeaderText="First Name" DataField="FirstName" />
              <asp:BoundField HeaderText="Last Name" DataField="LastName" />
              <asp:BoundField HeaderText="Title" DataField="Title" />
          </columns>
      </asp:GridView>

      <asp:Label
          id="Label1"
          runat="server">
      </asp:Label>

    </form>
  </body>
</html>

備註

發起事件會透過代理呼叫事件處理者。 欲了解更多如何處理事件的資訊，請參閱 「處理與提升事件」。

此 OnUpdated 方法也允許衍生類別在不附加代理的情況下處理事件。 這是在衍生類別中處理事件的首選技術。

給繼承者的注意事項

在導出類別中覆寫該 OnUpdated(SqlDataSourceStatusEventArgs) 方法時，務必呼叫 OnUpdated(SqlDataSourceStatusEventArgs) 該基底類別的方法，讓註冊代理接收事件。