BindingSource.Current Properti

Definisi

Ruang nama:

System.Windows.Forms

Rakitan:

System.Windows.Forms.dll

Mendapatkan item saat ini dalam daftar.

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

Nilai Properti

Object

Yang Object mewakili item saat ini dalam daftar dasar yang diwakili oleh List properti , atau null jika daftar tidak memiliki item.

Atribut

BrowsableAttribute

Contoh

Contoh kode berikut menunjukkan Current properti . Untuk menjalankan contoh ini, tempelkan kode ke dalam formulir dan panggil PopulateBindingSourceWithFonts metode dari metode penanganan peristiwa formulir Load .

  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

Keterangan

Current Gunakan properti untuk mengakses item saat ini, tetapi gunakan List properti untuk mendapatkan seluruh daftar. Untuk menentukan jenis objek saat ini, gunakan GetTypemetode , atau ToString .

Untuk mengubah item saat ini, atur Position properti ke nilai integral baru, atau gunakan salah satu metode navigasi seperti MoveNext.

Lihat juga

• List
• Position
• Count