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ListViewSortEventArgs.SortDirection Eigenschaft

Definition

Namespace:
System.Web.UI.WebControls
Assembly:
System.Web.Extensions.dll

Ruft die Richtung ab, in der das Steuerelement sortiert werden soll, oder legt diese ListView fest.

public:
 property System::Web::UI::WebControls::SortDirection SortDirection { System::Web::UI::WebControls::SortDirection get(); void set(System::Web::UI::WebControls::SortDirection value); };
public System.Web.UI.WebControls.SortDirection SortDirection { get; set; }
member this.SortDirection : System.Web.UI.WebControls.SortDirection with get, set
Public Property SortDirection As SortDirection

Eigenschaftswert

SortDirection

Einer der SortDirection Werte.

Beispiele

Das folgende Beispiel zeigt, wie das ListViewSortEventArgs Objekt zum Anzeigen der Sortierrichtung und der sortierten Spalte verwendet wird. Dieses Codebeispiel ist Teil eines größeren Beispiels, das für die ListViewSortEventArgs Klasse bereitgestellt wird.

void ContactsListView_Sorting(Object sender, ListViewSortEventArgs e)
{
  // Check the sort direction to set the image URL accordingly.
  string imgUrl;
  if (e.SortDirection == SortDirection.Ascending)
    imgUrl = "~/images/ascending.gif";
  else
    imgUrl = "~/images/descending.gif";
    
  // Check which field is being sorted
  // to set the visibility of the image controls.
  Image sortImage1 = (Image) ContactsListView.FindControl("SortImage1");
  Image sortImage2 = (Image)ContactsListView.FindControl("SortImage2");
  Image sortImage3 = (Image)ContactsListView.FindControl("SortImage3");
  switch (e.SortExpression)
  {
    case "FirstName":
      sortImage1.Visible = true;
      sortImage1.ImageUrl = imgUrl;
      sortImage2.Visible = false;
      sortImage3.Visible = false;
      break;
    case "LastName":
      sortImage1.Visible = false;
      sortImage2.Visible = true;
      sortImage2.ImageUrl = imgUrl;
      sortImage3.Visible = false;
      break;
    case "EmailAddress":
      sortImage1.Visible = false;
      sortImage2.Visible = false;
      sortImage3.Visible = true;
      sortImage3.ImageUrl = imgUrl;
      break;
  }
}

Sub ContactsListView_Sorting(ByVal sender As Object, ByVal e As ListViewSortEventArgs) 

  ' Check the sort direction to set the image URL accordingly.
  Dim imgUrl As String
  If e.SortDirection = SortDirection.Ascending Then
    imgUrl = "~/images/ascending.gif"
  Else
    imgUrl = "~/images/descending.gif"
  End If
  
  ' Check which field is being sorted
  ' to set the visibility of the image controls.
  Dim sortImage1 As Image = CType(ContactsListView.FindControl("SortImage1"), Image)
  Dim sortImage2 As Image = CType(ContactsListView.FindControl("SortImage2"), Image)
  Dim sortImage3 As Image = CType(ContactsListView.FindControl("SortImage3"), Image)
  
  Select Case e.SortExpression
    Case "FirstName"
      sortImage1.Visible = True
      sortImage1.ImageUrl = imgUrl
      sortImage2.Visible = False
      sortImage3.Visible = False
    Case "LastName"
      sortImage1.Visible = False
      sortImage2.Visible = True
      sortImage2.ImageUrl = imgUrl
      sortImage3.Visible = False
    Case "EmailAddress"
      sortImage1.Visible = False
      sortImage2.Visible = False
      sortImage3.Visible = True
      sortImage3.ImageUrl = imgUrl
  End Select
  
End Sub

Hinweise

Wenn das Sorting Ereignis ausgelöst wird, können Sie die SortDirection Eigenschaft verwenden, um die Reihenfolge anzugeben oder zu bestimmen, in der das ListView Steuerelement Elemente sortiert.

Gilt für:

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