ControlBuilder.GetChildControlType(String, IDictionary) Metodo

  • Riferimento

Definizione

Spazio dei nomi:
System.Web.UI
Assembly:
System.Web.dll

Ottiene l'oggetto Type del tipo di controllo corrispondente a un tag figlio. Questo metodo viene chiamato dal framework per le pagine ASP.NET.

public:
 virtual Type ^ GetChildControlType(System::String ^ tagName, System::Collections::IDictionary ^ attribs);
public virtual Type GetChildControlType (string tagName, System.Collections.IDictionary attribs);
abstract member GetChildControlType : string * System.Collections.IDictionary -> Type
override this.GetChildControlType : string * System.Collections.IDictionary -> Type
Public Overridable Function GetChildControlType (tagName As String, attribs As IDictionary) As Type

Parametri

tagName
String

Nome del tag del controllo figlio.

attribs
IDictionary

Matrice di attributi contenuti nel controllo figlio.

Restituisce

Type

Oggetto Type del controllo figlio del controllo specificato.

Esempio

// Create a custom ControlBuilder that interprets nested elements
// named myitem as TextBoxes. If this class is called in a 
// ControlBuilderAttribute applied to a custom control, when
// that control is created in a page and it contains child elements
// that are named myitem, the child elements will be rendered as 
// TextBox server controls. This control builder also ignores literal
// strings between elements when it is associated with a control.
[AspNetHostingPermission(SecurityAction.Demand, 
   Level=AspNetHostingPermissionLevel.Minimal)]
public sealed class MyItemControlBuilder : ControlBuilder 
{
   // Override the GetChildControlType method to detect
   // child elements named myitem.
   public override Type GetChildControlType(String tagName,
                                     IDictionary attributes)
   {
      if (String.Compare(tagName, "myitem", true) == 0) 
      {
         return typeof(TextBox);
      }
      return null;
   }

   // Override the AppendLiteralString method so that literal
   // text between rows of controls are ignored.  
   public override void AppendLiteralString(string s) 
   {
     // Ignores literals between rows.
   }
}

' Create a custom ControlBuilder that interprets nested elements
' named myitem as TextBoxes. If this class is called in a 
' ControlBuilderAttribute applied to a custom control, when
' that control is created in a page and it contains child elements
' that are named myitem, the child elements will be rendered as 
' TextBox server controls. This control builder also ignores literal
' strings between elements when it is associated with a control.

<AspNetHostingPermission(SecurityAction.Demand, _
  Level:=AspNetHostingPermissionLevel.Minimal)> _
Public NotInheritable Class MyItemControlBuilder
  Inherits ControlBuilder
  
  ' Override the GetChildControlType method to detect
  ' child elements named myitem.
  Public Overrides Function GetChildControlType(ByVal tagName As String, ByVal attribs As IDictionary) As Type
     If [String].Compare(tagName, "myitem", True) = 0 Then
        Return GetType(TextBox)
     End If
     Return Nothing
  End Function 'GetChildControlType
  
  
  ' Override the AppendLiteralString method so that literal
  ' text between rows of controls are ignored.  
  Public Overrides Sub AppendLiteralString(s As String)
  End Sub
End Class

Commenti

Questo metodo viene chiamato dal framework di pagina ASP.NET durante l'analisi e non deve essere chiamato direttamente nel codice.

Si applica a