CheckedListBox.DisplayMember Properti

Definisi

Ruang nama:

System.Windows.Forms

Rakitan:

System.Windows.Forms.dll

Sumber:

CheckedListBox.cs

Mendapatkan atau mengatur string yang menentukan properti objek yang terkandung dalam kotak daftar yang kontennya ingin Anda tampilkan.

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

Nilai Properti

String

String yang menentukan nama properti objek yang terkandung dalam kotak daftar. Defaultnya adalah string kosong ("").

Atribut

BrowsableAttribute

Contoh

Contoh kode berikut menunjukkan inisialisasi CheckedListBox kontrol dengan mengatur CheckOnClickproperti , SelectionMode, dan ThreeDCheckBoxes . Contoh mengisi CheckedListBox dengan kontrol dan mengatur ke DisplayMemberControl.Name properti kontrol.

Untuk menjalankan contoh, tempelkan kode berikut dalam formulir yang CheckedListBox berisi nama CheckedListBox1 dan panggil InitializeCheckListBox metode dari konstruktor formulir atau metode Muat.

   // 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

Keterangan

Secara default CheckedListBox menampilkan string default untuk item yang dikandungnya. Namun, CheckedListBox dapat menampilkan berbagai jenis objek dan Anda mungkin ingin mengubah string yang ditampilkan dengan menentukan DisplayMember properti . Jika properti yang ditentukan tidak ada, atau nilai DisplayMember properti adalah string kosong (""), hasil metode objek ToString ditampilkan sebagai gantinya.

Jika nilai DisplayMember baru tidak dapat diatur, nilai sebelumnya dipertahankan.