DataGridColumnStyle.HeaderTextChanged Evento

Definizione

Spazio dei nomi:

System.Windows.Forms

Assembly:

System.Windows.Forms.dll

Si verifica quando il valore della proprietà HeaderText cambia.

public:
 event EventHandler ^ HeaderTextChanged;

public event EventHandler HeaderTextChanged;

member this.HeaderTextChanged : EventHandler 

Public Custom Event HeaderTextChanged As EventHandler 

Tipo evento

EventHandler

Esempio

Nell'esempio di codice seguente viene illustrato l'uso di questo membro.

private:
   void AddCustomDataTableStyle()
   {
      DataGridTableStyle^ myTableStyle = gcnew DataGridTableStyle;
      
      // Map DataGridTableStyle to a DataTable.
      myTableStyle->MappingName = "Orders";
      
      // Get CurrencyManager Object*.
      CurrencyManager^ myCurrencyManager = dynamic_cast<CurrencyManager^>(BindingContext[myDataSet, "Orders"]);
      
      // Use the CurrencyManager to get the PropertyDescriptor for the column.
      PropertyDescriptor^ myPropertyDescriptor = myCurrencyManager->GetItemProperties()[ "Amount" ];
      
      // Change the HeaderText.
      DataGridColumnStyle^ myColumnStyle = gcnew DataGridTextBoxColumn( myPropertyDescriptor,"c",true );
      
      // Attach a event handler function with the 'HeaderTextChanged' event.
      myColumnStyle->HeaderTextChanged += gcnew EventHandler( this, &myDataForm::MyHeaderText_Changed );
      myColumnStyle->Width = 130;
      myColumnStyle->HeaderText = "Amount in $";
      myTableStyle->GridColumnStyles->Add( myColumnStyle );
      myDataGrid->TableStyles->Add( myTableStyle );
      TablesAlreadyAdded = (bool *)true;
   }

   void MyHeaderText_Changed( Object^ /*sender*/, EventArgs^ /*e*/ )
   {
      myLabel->Text = "Header Descriptor Property of DataGridColumnStyle has changed";
   }

private void AddCustomDataTableStyle()
{
   DataGridTableStyle myTableStyle = new DataGridTableStyle();
   // Map DataGridTableStyle to a DataTable.
   myTableStyle.MappingName = "Orders";
   // Get CurrencyManager object.
   CurrencyManager myCurrencyManager = (CurrencyManager)BindingContext[myDataSet,"Orders"];
   // Use the CurrencyManager to get the PropertyDescriptor for the column.
   PropertyDescriptor myPropertyDescriptor = myCurrencyManager.GetItemProperties()["Amount"];
   // Change the HeaderText.
   DataGridColumnStyle myColumnStyle = new DataGridTextBoxColumn(myPropertyDescriptor,"c",true);
   // Attach a event handler function with the 'HeaderTextChanged' event.
   myColumnStyle.HeaderTextChanged+=new EventHandler(MyHeaderText_Changed);
   myColumnStyle.Width=130;
   myColumnStyle.HeaderText="Amount in $";
   myTableStyle.GridColumnStyles.Add(myColumnStyle);
   myDataGrid.TableStyles.Add(myTableStyle);
   TablesAlreadyAdded=true;
}

private void MyHeaderText_Changed(object sender,EventArgs e)
{
   myLabel.Text="Header Descriptor Property of DataGridColumnStyle has changed";
}

Private Sub AddCustomDataTableStyle()
   Dim myTableStyle As New DataGridTableStyle()
   ' Map DataGridTableStyle to a DataTable.
   myTableStyle.MappingName = "Orders"
   ' Get CurrencyManager object.
   Dim myCurrencyManager As CurrencyManager = CType(BindingContext(myDataSet, "Orders"), CurrencyManager)
   ' Use the CurrencyManager to get the PropertyDescriptor for the column.
   Dim myPropertyDescriptor As PropertyDescriptor = myCurrencyManager.GetItemProperties()("Amount")
   ' Change the HeaderText.
   Dim myColumnStyle As DataGridTextBoxColumn = New DataGridTextBoxColumn(myPropertyDescriptor, "c", True)
   ' Attach a event handler function with the 'HeaderTextChanged' event.
   AddHandler myColumnStyle.HeaderTextChanged, AddressOf MyHeaderText_Changed
   myColumnStyle.Width = 130
   myColumnStyle.HeaderText = "Amount in $"
   myTableStyle.GridColumnStyles.Add(myColumnStyle)
   myDataGrid.TableStyles.Add(myTableStyle)
   TablesAlreadyAdded = True
End Sub

 Private Sub MyHeaderText_Changed(ByVal sender As Object, ByVal e As EventArgs)
     myLabel.Text = "Header Descriptor Property of DataGridColumnStyle has changed"
 End Sub