ControlBindingsCollection.Item[String] Egenskap

Definition

Namnområde:
System.Windows.Forms
Sammansättning:
System.Windows.Forms.dll

Hämtar det Binding som anges av kontrollens egenskapsnamn.

public:
 property System::Windows::Forms::Binding ^ default[System::String ^] { System::Windows::Forms::Binding ^ get(System::String ^ propertyName); };
public System.Windows.Forms.Binding this[string propertyName] { get; }
member this.Item(string) : System.Windows.Forms.Binding
Default Public ReadOnly Property Item(propertyName As String) As Binding

Parametrar

propertyName
String

Namnet på egenskapen på den databundna kontrollen.

Egenskapsvärde

Binding

Som Binding binder den angivna kontrollegenskapen till en datakälla.

Exempel

Följande kodexempel returnerar en enda Binding från en ControlBindingsCollection.

void PrintValue()
{
   ControlBindingsCollection^ myControlBindings;
   myControlBindings = textBox1->DataBindings;
   
   // Get the Binding for the Text property.
   Binding^ myBinding = myControlBindings[ "Text" ];
   
   // Assuming the data source is a DataTable.
   DataRowView^ drv;
   drv = dynamic_cast<DataRowView^>(myBinding->BindingManagerBase->Current);
   
   // Assuming a column named S"custName" exists, print the value.
   Console::WriteLine( drv[ "custName" ] );
}

private void PrintValue()
{
   ControlBindingsCollection myControlBindings;
   myControlBindings = textBox1.DataBindings;

   // Get the Binding for the Text property.
   Binding myBinding = myControlBindings["Text"];

   // Assuming the data source is a DataTable.
   DataRowView drv;
   drv = (DataRowView) myBinding.BindingManagerBase.Current;

   // Assuming a column named "custName" exists, print the value.
   Console.WriteLine(drv["custName"]);
}

Private Sub PrintValue()

   Dim myControlBindings As ControlBindingsCollection = _
   textBox1.DataBindings

   ' Get the Binding for the Text property.
   Dim myBinding As Binding = myControlBindings("Text")

   ' Assuming the data source is a DataTable.
   Dim drv As DataRowView = _
   CType( myBinding.BindingManagerBase.Current, DataRowView)

   ' Assuming a column named "custName" exists, print the value.
   Console.WriteLine(drv("custName"))
End Sub

Kommentarer

Om den angivna egenskapen inte matchar en bindning i samlingen Item[] returnerar null.

Gäller för