CheckedListBox.DisplayMember 屬性

定義

命名空間:

System.Windows.Forms

組件:

System.Windows.Forms.dll

取得或設定字串，該字串指定所要顯示清單方塊中所包含物件的屬性。

public:
 property System::String ^ DisplayMember { System::String ^ get(); void set(System::String ^ value); };

[System.ComponentModel.Browsable(false)]
public string DisplayMember { get; set; }

[<System.ComponentModel.Browsable(false)>]
member this.DisplayMember : string with get, set

Public Property DisplayMember As String

屬性值

String

字串，指定清單方塊中所包含物件的屬性名稱。 預設為空字串 ("")。

屬性

BrowsableAttribute

範例

下列程式碼範例示範如何藉由設定 CheckOnClick 、 SelectionMode 和 ThreeDCheckBoxes 屬性來初始化 CheckedListBox 控制項。 此範例會以 CheckedListBox 控制項填入 ，並將 設定 DisplayMember 為 Control.Name 控制項的 屬性。

若要執行此範例，請將下列程式碼貼到包含 CheckedListBox 具名 CheckedListBox1 的表單中，並從表單的建構函式或 Load 方法呼叫 InitializeCheckListBox 方法。

   // This method initializes CheckedListBox1 with a list of all 
   // the controls on the form. It sets the selection mode
   // to single selection and allows selection with a single click.
   // It adds itself to the list before adding itself to the form.
internal:
   System::Windows::Forms::CheckedListBox^ CheckedListBox1;

private:
   void InitializeCheckedListBox()
   {
      this->CheckedListBox1 = gcnew CheckedListBox;
      this->CheckedListBox1->Location = System::Drawing::Point( 40, 90 );
      this->CheckedListBox1->CheckOnClick = true;
      this->CheckedListBox1->Name = "CheckedListBox1";
      this->CheckedListBox1->Size = System::Drawing::Size( 120, 94 );
      this->CheckedListBox1->TabIndex = 1;
      this->CheckedListBox1->SelectionMode = SelectionMode::One;
      this->CheckedListBox1->ThreeDCheckBoxes = true;
      System::Collections::IEnumerator^ myEnum = this->Controls->GetEnumerator();
      while ( myEnum->MoveNext() )
      {
         Control^ aControl = safe_cast<Control^>(myEnum->Current);
         this->CheckedListBox1->Items->Add( aControl, false );
      }

      this->CheckedListBox1->DisplayMember = "Name";
      this->CheckedListBox1->Items->Add( CheckedListBox1 );
      this->Controls->Add( this->CheckedListBox1 );
   }

// This method initializes CheckedListBox1 with a list of all 
// the controls on the form. It sets the selection mode
// to single selection and allows selection with a single click.
// It adds itself to the list before adding itself to the form.

internal System.Windows.Forms.CheckedListBox CheckedListBox1;

private void InitializeCheckedListBox()
{
    this.CheckedListBox1 = new CheckedListBox();
    this.CheckedListBox1.Location = new System.Drawing.Point(40, 90);
    this.CheckedListBox1.CheckOnClick = true;
    this.CheckedListBox1.Name = "CheckedListBox1";
    this.CheckedListBox1.Size = new System.Drawing.Size(120, 94);
    this.CheckedListBox1.TabIndex = 1;
    this.CheckedListBox1.SelectionMode = SelectionMode.One;
    this.CheckedListBox1.ThreeDCheckBoxes = true;

    foreach ( Control aControl in this.Controls )
    {
        this.CheckedListBox1.Items.Add(aControl, false);
    }

    this.CheckedListBox1.DisplayMember = "Name";
    this.CheckedListBox1.Items.Add(CheckedListBox1);
    this.Controls.Add(this.CheckedListBox1);
}

' This method initializes CheckedListBox1 with a list of all the controls
' on the form. It sets the selection mode to single selection and
' allows selection with a single click. It adds itself to the list before 
' adding itself to the form.
Friend WithEvents CheckedListBox1 As System.Windows.Forms.CheckedListBox

Private Sub InitializeCheckedListBox()
    Me.CheckedListBox1 = New CheckedListBox
    Me.CheckedListBox1.Location = New System.Drawing.Point(40, 90)
    Me.CheckedListBox1.CheckOnClick = True
    Me.CheckedListBox1.Name = "CheckedListBox1"
    Me.CheckedListBox1.Size = New System.Drawing.Size(120, 94)
    Me.CheckedListBox1.TabIndex = 1
    Me.CheckedListBox1.SelectionMode = SelectionMode.One
    Me.CheckedListBox1.ThreeDCheckBoxes = True

    Dim aControl As Control
    For Each aControl In Me.Controls
        Me.CheckedListBox1.Items.Add(aControl, False)
    Next

    Me.CheckedListBox1.DisplayMember = "Name"
    Me.CheckedListBox1.Items.Add(CheckedListBox1)
    Me.Controls.Add(Me.CheckedListBox1)
End Sub

備註

根據預設， CheckedListBox 會顯示其包含之專案的預設字串。 不過， CheckedListBox 可以顯示各種不同的物件類型，而且您可以藉由指定 DisplayMember 屬性來變更顯示的字串。 如果指定的屬性不存在，或屬性的值 DisplayMember 是空字串 (「」「) ，則會改為顯示物件方法 ToString 的結果。

如果無法設定 的新值 DisplayMember ，則會維護先前的值。