BindingSource.Current Propriedade

Definição

Namespace:

System.Windows.Forms

Assembly:

System.Windows.Forms.dll

Obtém o item atual na lista.

public:
 property System::Object ^ Current { System::Object ^ get(); };

[System.ComponentModel.Browsable(false)]
public object Current { get; }

[<System.ComponentModel.Browsable(false)>]
member this.Current : obj

Public ReadOnly Property Current As Object

Valor da propriedade

Object

Um Object que representa o item atual na lista subjacente representada pela propriedade List, ou null, se a lista não tiver nenhum item.

Atributos

BrowsableAttribute

Exemplos

O exemplo de código a seguir demonstra a Current propriedade . Para executar este exemplo, cole o código em um formulário e chame o PopulateBindingSourceWithFonts método do método de tratamento de eventos do Load formulário.

  public BindingSource bindingSource1 = new BindingSource();
  TextBox box1 = new TextBox();

  private void PopulateBindingSourceWithFonts()
  {
      bindingSource1.CurrentChanged += new EventHandler(bindingSource1_CurrentChanged);
      bindingSource1.Add(new Font(FontFamily.Families[2], 8.0F));
      bindingSource1.Add(new Font(FontFamily.Families[4], 9.0F));
      bindingSource1.Add(new Font(FontFamily.Families[6], 10.0F));
      bindingSource1.Add(new Font(FontFamily.Families[8], 11.0F));
      bindingSource1.Add(new Font(FontFamily.Families[10], 12.0F));
      DataGridView view1 = new DataGridView();
      view1.DataSource = bindingSource1;
      view1.AutoGenerateColumns = true;
      view1.Dock = DockStyle.Top;
      this.Controls.Add(view1);
      box1.Dock = DockStyle.Bottom;
      box1.Text = "Sample Text";
      this.Controls.Add(box1);
      box1.DataBindings.Add("Text", bindingSource1, "Name");
      view1.Columns[7].DisplayIndex = 0;
  }

  void bindingSource1_CurrentChanged(object sender, EventArgs e)
  {
      box1.Font = (Font)bindingSource1.Current;
  }

 Private WithEvents bindingSource1 As New BindingSource()
 Private box1 As New TextBox()

 
 Private Sub PopulateBindingSourceWithFonts()
   
     bindingSource1.Add(New Font(FontFamily.Families(2), 8.0F))
     bindingSource1.Add(New Font(FontFamily.Families(4), 9.0F))
     bindingSource1.Add(New Font(FontFamily.Families(6), 10.0F))
     bindingSource1.Add(New Font(FontFamily.Families(8), 11.0F))
     bindingSource1.Add(New Font(FontFamily.Families(10), 12.0F))
     Dim view1 As New DataGridView()
     view1.DataSource = bindingSource1
     view1.AutoGenerateColumns = True
     view1.Dock = DockStyle.Top
     Me.Controls.Add(view1)
     box1.Dock = DockStyle.Bottom
     box1.Text = "Sample Text"
     Me.Controls.Add(box1)
     view1.Columns("Name").DisplayIndex = 0
     box1.DataBindings.Add("Text", bindingSource1, "Name")
     
 End Sub
  
 Sub bindingSource1_CurrentChanged(ByVal sender As Object, ByVal e As EventArgs) _
     Handles bindingSource1.CurrentChanged
     box1.Font = CType(bindingSource1.Current, Font)
 End Sub

Comentários

Use a Current propriedade para acessar o item atual, mas use a List propriedade para obter a lista inteira. Para determinar o tipo do objeto atual, use os GetTypemétodos ou ToString .

Para alterar o item atual, defina a Position propriedade como um novo valor integral ou use um dos métodos de navegação, como MoveNext.

Confira também

• List
• Position
• Count