ControlBindingsCollection.Add Metodo

public:
 void Add(System::Windows::Forms::Binding ^ binding);

public void Add (System.Windows.Forms.Binding binding);

override this.Add : System.Windows.Forms.Binding -> unit

Public Sub Add (binding As Binding)

Parametri

Eccezioni

Esempio

Nell'esempio di codice seguente viene creata un'istanza Binding di e viene utilizzato il Add metodo per aggiungere l'istanza a ControlBindingsCollection di un TextBox controllo .

protected:
   void BindControls()
   {
      /* Create a new Binding using the DataSet and a 
         navigation path(TableName.RelationName.ColumnName).
         Add event delegates for the Parse and Format events to 
         the Binding object, and add the object to the third 
         TextBox control's BindingsCollection. The delegates 
         must be added before adding the Binding to the 
         collection; otherwise, no formatting occurs until 
         the Current object of the BindingManagerBase for 
         the data source changes. */
      Binding^ b = gcnew Binding(
         "Text",ds,"customers.custToOrders.OrderAmount" );
      b->Parse += gcnew ConvertEventHandler(
         this, &Form1::CurrencyStringToDecimal );
      b->Format += gcnew ConvertEventHandler(
         this, &Form1::DecimalToCurrencyString );
      textBox1->DataBindings->Add( b );
   }

protected void BindControls()
{
   /* Create a new Binding using the DataSet and a 
   navigation path(TableName.RelationName.ColumnName).
   Add event delegates for the Parse and Format events to 
   the Binding object, and add the object to the third 
   TextBox control's BindingsCollection. The delegates 
   must be added before adding the Binding to the 
   collection; otherwise, no formatting occurs until 
   the Current object of the BindingManagerBase for 
   the data source changes. */
   Binding b = new Binding
   ("Text", ds, "customers.custToOrders.OrderAmount");
   b.Parse+=new ConvertEventHandler(CurrencyStringToDecimal);
   b.Format+=new ConvertEventHandler(DecimalToCurrencyString);
   textBox1.DataBindings.Add(b);
}

Protected Sub BindControls()
    ' Create a new Binding using the DataSet and a 
    ' navigation path(TableName.RelationName.ColumnName).
    ' Add event delegates for the Parse and Format events to 
    ' the Binding object, and add the object to the third 
    ' TextBox control's BindingsCollection. The delegates 
    ' must be added before adding the Binding to the 
    ' collection; otherwise, no formatting occurs until 
    ' the Current object of the BindingManagerBase for 
    ' the data source changes. 
    Dim b As New Binding("Text", ds, "customers.custToOrders.OrderAmount")
    AddHandler b.Parse, AddressOf CurrencyStringToDecimal
    AddHandler b.Format, AddressOf DecimalToCurrencyString
    textBox1.DataBindings.Add(b)
End Sub

Commenti

La DataSourceUpdateMode proprietà dell'oggetto Binding creato da questo overload del Add metodo viene impostata sul valore della DefaultDataSourceUpdateMode proprietà .

L'evento CollectionChanged si verifica al termine della modifica.

public:
 System::Windows::Forms::Binding ^ Add(System::String ^ propertyName, System::Object ^ dataSource, System::String ^ dataMember);

public System.Windows.Forms.Binding Add (string propertyName, object dataSource, string dataMember);

public System.Windows.Forms.Binding Add (string propertyName, object dataSource, string? dataMember);

override this.Add : string * obj * string -> System.Windows.Forms.Binding

Public Function Add (propertyName As String, dataSource As Object, dataMember As String) As Binding

Parametri

Restituisce

Oggetto Binding appena creato.

Eccezioni

Esempio

Nell'esempio di codice seguente viene utilizzato il Add metodo per aggiungere tre Binding oggetti all'oggetto ControlBindingsCollection di un TextBox controllo . È possibile accedere a ControlBindingsCollection tramite la proprietà DataBindings della classe Control.

private:
   void BindTextBoxProperties()
   {
      // Clear the collection before adding new Binding objects.
      textBox1->DataBindings->Clear();

      // Create a DataTable containing Color objects.
      DataTable^ t = MakeTable();

      /* Bind the Text, BackColor, and ForeColor properties
         to columns in the DataTable. */
      textBox1->DataBindings->Add( "Text", t, "Text" );
      textBox1->DataBindings->Add( "BackColor", t, "BackColor" );
      textBox1->DataBindings->Add( "ForeColor", t, "ForeColor" );
   }

   DataTable^ MakeTable()
   {
      /* Create a DataTable with three columns.
         Two of the columns contain Color objects. */
      DataTable^ t = gcnew DataTable( "Control" );
      t->Columns->Add( "BackColor", Color::typeid );
      t->Columns->Add( "ForeColor", Color::typeid );
      t->Columns->Add( "Text" );

      // Add three rows to the table.
      DataRow^ r;
      r = t->NewRow();
      r[ "BackColor" ] = Color::Blue;
      r[ "ForeColor" ] = Color::Yellow;
      r[ "Text" ] = "Yellow on Blue";
      t->Rows->Add( r );
      r = t->NewRow();
      r[ "BackColor" ] = Color::White;
      r[ "ForeColor" ] = Color::Green;
      r[ "Text" ] = "Green on white";
      t->Rows->Add( r );
      r = t->NewRow();
      r[ "BackColor" ] = Color::Orange;
      r[ "ForeColor" ] = Color::Black;
      r[ "Text" ] = "Black on Orange";
      t->Rows->Add( r );
      return t;
   }

private void BindTextBoxProperties()
{
   // Clear the collection before adding new Binding objects.
   textBox1.DataBindings.Clear();

   // Create a DataTable containing Color objects.
   DataTable t = MakeTable();

   /* Bind the Text, BackColor, and ForeColor properties
   to columns in the DataTable. */
   textBox1.DataBindings.Add("Text", t, "Text");
   textBox1.DataBindings.Add("BackColor", t, "BackColor");
   textBox1.DataBindings.Add("ForeColor", t, "ForeColor");
}

private DataTable MakeTable()
{
   /* Create a DataTable with three columns.
   Two of the columns contain Color objects. */

   DataTable t = new DataTable("Control");
   t.Columns.Add("BackColor", typeof(Color));
   t.Columns.Add("ForeColor", typeof(Color));
   t.Columns.Add("Text");

   // Add three rows to the table.
   DataRow r;

   r = t.NewRow();
   r["BackColor"] = Color.Blue;
   r["ForeColor"] = Color.Yellow;
   r["Text"] = "Yellow on Blue";
   t.Rows.Add(r);

   r = t.NewRow();
   r["BackColor"] = Color.White;
   r["ForeColor"] = Color.Green;
   r["Text"] = "Green on white";
   t.Rows.Add(r);

   r = t.NewRow();
   r["BackColor"] = Color.Orange;
   r["ForeColor"] = Color.Black;
   r["Text"] = "Black on Orange";
   t.Rows.Add(r);

   return t;
}

Private Sub BindTextBoxProperties()
    ' Clear the collection before adding new Binding objects.
    textBox1.DataBindings.Clear()
    
    ' Create a DataTable containing Color objects.
    Dim t As DataTable = MakeTable()
    
    ' Bind the Text, BackColor, and ForeColor properties
    ' to columns in the DataTable. 
    textBox1.DataBindings.Add("Text", t, "Text")
    textBox1.DataBindings.Add("BackColor", t, "BackColor")
    textBox1.DataBindings.Add("ForeColor", t, "ForeColor")
End Sub    

Private Function MakeTable() As DataTable
    ' Create a DataTable with three columns.
    ' Two of the columns contain Color objects. 
    
    Dim t As New DataTable("Control")
    t.Columns.Add("BackColor", GetType(Color))
    t.Columns.Add("ForeColor", GetType(Color))
    t.Columns.Add("Text")
    
    ' Add three rows to the table.
    Dim r As DataRow
    
    r = t.NewRow()
    r("BackColor") = Color.Blue
    r("ForeColor") = Color.Yellow
    r("Text") = "Yellow on Blue"
    t.Rows.Add(r)
    
    r = t.NewRow()
    r("BackColor") = Color.White
    r("ForeColor") = Color.Green
    r("Text") = "Green on white"
    t.Rows.Add(r)
    
    r = t.NewRow()
    r("BackColor") = Color.Orange
    r("ForeColor") = Color.Black
    r("Text") = "Black on Orange"
    t.Rows.Add(r)
    
    Return t
End Function

Commenti

La DataSourceUpdateMode proprietà dell'oggetto Binding creato da questo overload del Add metodo viene impostata sul valore della DefaultDataSourceUpdateMode proprietà .

L'aggiunta di un Binding fa sì che si verifichi l'evento CollectionChanged .

public:
 System::Windows::Forms::Binding ^ Add(System::String ^ propertyName, System::Object ^ dataSource, System::String ^ dataMember, bool formattingEnabled);

public System.Windows.Forms.Binding Add (string propertyName, object dataSource, string dataMember, bool formattingEnabled);

public System.Windows.Forms.Binding Add (string propertyName, object dataSource, string? dataMember, bool formattingEnabled);

override this.Add : string * obj * string * bool -> System.Windows.Forms.Binding

Public Function Add (propertyName As String, dataSource As Object, dataMember As String, formattingEnabled As Boolean) As Binding

Parametri

Restituisce

Oggetto Binding appena creato.

Eccezioni

public:
 System::Windows::Forms::Binding ^ Add(System::String ^ propertyName, System::Object ^ dataSource, System::String ^ dataMember, bool formattingEnabled, System::Windows::Forms::DataSourceUpdateMode updateMode);

public System.Windows.Forms.Binding Add (string propertyName, object dataSource, string dataMember, bool formattingEnabled, System.Windows.Forms.DataSourceUpdateMode updateMode);

public System.Windows.Forms.Binding Add (string propertyName, object dataSource, string? dataMember, bool formattingEnabled, System.Windows.Forms.DataSourceUpdateMode updateMode);

override this.Add : string * obj * string * bool * System.Windows.Forms.DataSourceUpdateMode -> System.Windows.Forms.Binding

Public Function Add (propertyName As String, dataSource As Object, dataMember As String, formattingEnabled As Boolean, updateMode As DataSourceUpdateMode) As Binding

Parametri

Restituisce

Oggetto Binding appena creato.

Eccezioni

Commenti

La chiamata al Add metodo genera l'evento CollectionChanged .

public:
 System::Windows::Forms::Binding ^ Add(System::String ^ propertyName, System::Object ^ dataSource, System::String ^ dataMember, bool formattingEnabled, System::Windows::Forms::DataSourceUpdateMode updateMode, System::Object ^ nullValue);

public System.Windows.Forms.Binding Add (string propertyName, object dataSource, string dataMember, bool formattingEnabled, System.Windows.Forms.DataSourceUpdateMode updateMode, object nullValue);

public System.Windows.Forms.Binding Add (string propertyName, object dataSource, string? dataMember, bool formattingEnabled, System.Windows.Forms.DataSourceUpdateMode updateMode, object? nullValue);

override this.Add : string * obj * string * bool * System.Windows.Forms.DataSourceUpdateMode * obj -> System.Windows.Forms.Binding

Public Function Add (propertyName As String, dataSource As Object, dataMember As String, formattingEnabled As Boolean, updateMode As DataSourceUpdateMode, nullValue As Object) As Binding

Parametri

Restituisce

Oggetto Binding appena creato.

Eccezioni

Commenti

La chiamata al Add metodo genera l'evento CollectionChanged .

public:
 System::Windows::Forms::Binding ^ Add(System::String ^ propertyName, System::Object ^ dataSource, System::String ^ dataMember, bool formattingEnabled, System::Windows::Forms::DataSourceUpdateMode updateMode, System::Object ^ nullValue, System::String ^ formatString);

public System.Windows.Forms.Binding Add (string propertyName, object dataSource, string dataMember, bool formattingEnabled, System.Windows.Forms.DataSourceUpdateMode updateMode, object nullValue, string formatString);

public System.Windows.Forms.Binding Add (string propertyName, object dataSource, string? dataMember, bool formattingEnabled, System.Windows.Forms.DataSourceUpdateMode updateMode, object? nullValue, string formatString);

override this.Add : string * obj * string * bool * System.Windows.Forms.DataSourceUpdateMode * obj * string -> System.Windows.Forms.Binding

Public Function Add (propertyName As String, dataSource As Object, dataMember As String, formattingEnabled As Boolean, updateMode As DataSourceUpdateMode, nullValue As Object, formatString As String) As Binding

Parametri

Restituisce

Oggetto Binding appena creato.

Eccezioni

Commenti

La chiamata al Add metodo genera l'evento CollectionChanged .

public:
 System::Windows::Forms::Binding ^ Add(System::String ^ propertyName, System::Object ^ dataSource, System::String ^ dataMember, bool formattingEnabled, System::Windows::Forms::DataSourceUpdateMode updateMode, System::Object ^ nullValue, System::String ^ formatString, IFormatProvider ^ formatInfo);

public System.Windows.Forms.Binding Add (string propertyName, object dataSource, string dataMember, bool formattingEnabled, System.Windows.Forms.DataSourceUpdateMode updateMode, object nullValue, string formatString, IFormatProvider formatInfo);

public System.Windows.Forms.Binding Add (string propertyName, object dataSource, string? dataMember, bool formattingEnabled, System.Windows.Forms.DataSourceUpdateMode updateMode, object? nullValue, string formatString, IFormatProvider? formatInfo);

override this.Add : string * obj * string * bool * System.Windows.Forms.DataSourceUpdateMode * obj * string * IFormatProvider -> System.Windows.Forms.Binding

Public Function Add (propertyName As String, dataSource As Object, dataMember As String, formattingEnabled As Boolean, updateMode As DataSourceUpdateMode, nullValue As Object, formatString As String, formatInfo As IFormatProvider) As Binding

Parametri

Restituisce

Oggetto Binding appena creato.

Eccezioni

Commenti

La chiamata al metodo genera l'evento AddCollectionChanged .