BindingSource.Add(Object) 方法

  • 參考

定義

命名空間:
System.Windows.Forms
組件:
System.Windows.Forms.dll

將現有項目加入內部清單中。

public:
 virtual int Add(System::Object ^ value);
public virtual int Add (object value);
public virtual int Add (object? value);
abstract member Add : obj -> int
override this.Add : obj -> int
Public Overridable Function Add (value As Object) As Integer

參數

value
Object

要加入內部清單中的 Object。

傳回

Int32

以零起始的索引，value 會在其上加入由 List 屬性所表示的基礎清單。

實作

Add(Object)

例外狀況

InvalidOperationException

value，其型別與基礎清單中現有項目的型別不同。

範例

下列程式碼範例如何使用 Add 方法。 若要執行此範例，請將程式碼貼到 Windows Form 中，然後從表單的建構函式呼叫 PopulateBindingSourceWithFonts 方法。

  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

備註

方法 Add 會參考基礎清單方法的 Add 呼叫。

內部清單必須包含同質類型。 DataSource如果尚未設定 屬性，則新增至清單的第一個物件會定義清單的類型。

這個方法會 ListChanged 引發 事件。

適用於

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