SqlDataSourceStatusEventHandler Délégué

Définition

Représente la méthode qui gérera les événements Selected, Updated, Inserted, et Deleted du contrôle SqlDataSource.Represents the method that will handle the Selected, Updated, Inserted, and Deleted events of the SqlDataSource control.

public delegate void SqlDataSourceStatusEventHandler(System::Object ^ sender, SqlDataSourceStatusEventArgs ^ e);
public delegate void SqlDataSourceStatusEventHandler(object sender, SqlDataSourceStatusEventArgs e);
type SqlDataSourceStatusEventHandler = delegate of obj * SqlDataSourceStatusEventArgs -> unit
Public Delegate Sub SqlDataSourceStatusEventHandler(sender As Object, e As SqlDataSourceStatusEventArgs)

Paramètres

sender
Object

Source de l'événement, le contrôle SqlDataSource.The source of the event, the SqlDataSource control.

e
SqlDataSourceStatusEventArgs

SqlDataSourceStatusEventArgs qui contient les données d'événement.A SqlDataSourceStatusEventArgs that contains the event data.

Héritage
SqlDataSourceStatusEventHandler

Exemples

L’exemple de code suivant montre comment gérer l' Updated événement et examiner les valeurs contenues dans SqlDataSourceStatusEventArgs l’objet.The following code example demonstrates how to handle the Updated event and examine the values contained in the SqlDataSourceStatusEventArgs object. Le OnDSUpdatedHandler est appelé par la OnUpdated méthode pour effectuer un traitement supplémentaire Update après qu’une action est effectuée par un SqlDataSource contrôle.The OnDSUpdatedHandler is called by the OnUpdated method to perform additional post-processing after an Update action is performed by a SqlDataSource control.

<%@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 setting a status label after the operation.
        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>
    <form id="form1" runat="server">

      <asp:SqlDataSource
          id="SqlDataSource1"
          runat="server"
          DataSourceMode="DataSet"
          ConnectionString="<%$ ConnectionStrings:MyNorthwind%>"
          SelectCommand="SELECT EmployeeID,FirstName,LastName,Title FROM Employees"
          UpdateCommand="Update Employees SET FirstName=@FirstName,LastName=@LastName,Title=@Title WHERE EmployeeID=@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 after the operation.        
        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>
    <form id="form1" runat="server">

      <asp:SqlDataSource
          id="SqlDataSource1"
          runat="server"
          DataSourceMode="DataSet"
          ConnectionString="<%$ ConnectionStrings:MyNorthwind%>"
          SelectCommand="SELECT EmployeeID,FirstName,LastName,Title FROM Employees"
          UpdateCommand="Update Employees SET FirstName=@FirstName,LastName=@LastName,Title=@Title WHERE EmployeeID=@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>

Remarques

Lorsque vous créez un délégué SqlDataSourceStatusEventHandler, vous identifiez la méthode qui gérera l'événement.When you create a SqlDataSourceStatusEventHandler delegate, you identify the method that will handle the event. Pour associer l'événement au gestionnaire d'événements, ajoutez une instance du délégué à l'événement.To associate the event with your event handler, add an instance of the delegate to the event. Le gestionnaire d'événements est appelé chaque fois qu'un événement se produit, sauf si vous supprimez le délégué.The event handler is called whenever the event occurs, unless you remove the delegate. Pour plus d’informations sur la façon de gérer les événements, consultez gestion et déclenchement d’événements.For more information about how to handle events, see Handling and Raising Events.

Méthodes d’extension

GetMethodInfo(Delegate)

Obtient un objet qui représente la méthode représentée par le délégué spécifié.Gets an object that represents the method represented by the specified delegate.

S’applique à

Voir aussi