DataGridViewCheckBoxColumn.ThreeState 속성

정의

호스팅된 확인란 셀이 두 가지가 아닌 세 가지의 선택 상태를 허용하는지 여부를 나타내는 값을 가져오거나 설정합니다.Gets or sets a value indicating whether the hosted check box cells will allow three check states rather than two.

public:
 property bool ThreeState { bool get(); void set(bool value); };
public bool ThreeState { get; set; }
member this.ThreeState : bool with get, set
Public Property ThreeState As Boolean

속성 값

호스팅된 DataGridViewCheckBoxCell 개체가 셋째 상태인 결정되지 않은 상태를 가질 수 있으면 true이고, 그렇지 않으면 false입니다.true if the hosted DataGridViewCheckBoxCell objects are able to have a third, indeterminate, state; otherwise, false. 기본값은 false입니다.The default is false.

예외

CellTemplate 속성의 값이 null인 경우The value of the CellTemplate property is null.

예제

다음 코드 예제에서는 DataGridViewCheckBoxColumn office 조명의 상태를 추적할 수 있습니다.The following code example uses a DataGridViewCheckBoxColumn to track the status of office lighting. FalseValue 연결 속성 "turnedOff" falseTrueValue 연결 속성 "turnedOn" true, 및 IndeterminateValue 속성 "unknown" 비활성화 상태에 연결 합니다.The FalseValue property associates "turnedOff" with false, the TrueValue property associates "turnedOn" with true, and the IndeterminateValue property associates "unknown" to indeterminate.

#using <System.Windows.Forms.dll>
#using <System.dll>
#using <System.Drawing.dll>
using namespace System;
using namespace System::IO;
using namespace System::Collections::Generic;
using namespace System::Windows::Forms;

public enum class LightStatus
{
    Unknown,
    TurnedOn,
    TurnedOff
};

public ref class TriValueVirtualCheckBox: public Form
{
private:
    DataGridView^ dataGridView1;

private:
    const int initialSize;

private:
    Dictionary<int, LightStatus>^ store;

public:
    TriValueVirtualCheckBox() :  Form(), initialSize(500)
    {
        dataGridView1 = gcnew DataGridView();
        store = gcnew Dictionary<int, LightStatus>();
        Text = this->GetType()->Name;

        for(int i = 0; i < initialSize; i++)
        {
            store->Add(i, LightStatus::Unknown);
        }

        Controls->Add(dataGridView1);
        dataGridView1->VirtualMode = true;
        dataGridView1->AllowUserToDeleteRows = false;
        dataGridView1->CellValueNeeded += 
            gcnew DataGridViewCellValueEventHandler(
            this, &TriValueVirtualCheckBox::dataGridView1_CellValueNeeded);
        dataGridView1->CellValuePushed += 
            gcnew DataGridViewCellValueEventHandler(
            this, &TriValueVirtualCheckBox::dataGridView1_CellValuePushed);

        dataGridView1->Columns->Add(CreateCheckBoxColumn());
        dataGridView1->Rows->AddCopies(0, initialSize);
    }

private:
    DataGridViewCheckBoxColumn^ CreateCheckBoxColumn()
    {
        DataGridViewCheckBoxColumn^ dataGridViewCheckBoxColumn1
            = gcnew DataGridViewCheckBoxColumn();
        dataGridViewCheckBoxColumn1->HeaderText = "Lights On";
        dataGridViewCheckBoxColumn1->TrueValue = LightStatus::TurnedOn;
        dataGridViewCheckBoxColumn1->FalseValue =
            LightStatus::TurnedOff;
        dataGridViewCheckBoxColumn1->IndeterminateValue
            = LightStatus::Unknown;
        dataGridViewCheckBoxColumn1->ThreeState = true;
        dataGridViewCheckBoxColumn1->ValueType = LightStatus::typeid;
        return dataGridViewCheckBoxColumn1;
    }

#pragma region "data store maintance"
private:
    void dataGridView1_CellValueNeeded(Object^ sender,
        DataGridViewCellValueEventArgs^ e)
    {
        e->Value = store[e->RowIndex];
    }

private:
    void dataGridView1_CellValuePushed(Object^ sender,
        DataGridViewCellValueEventArgs^ e)
    {
        store[e->RowIndex] = (LightStatus) e->Value;
    }
#pragma endregion

};

[STAThread]
int main()
{
    Application::Run(gcnew TriValueVirtualCheckBox());
}

using System;
using System.IO;
using System.Collections.Generic;
using System.Windows.Forms;

public class TriValueVirtualCheckBox:Form
{
    DataGridView dataGridView1 = new DataGridView();

    const int initialSize = 500;

    Dictionary<int, LightStatus> store 
        = new Dictionary<int, LightStatus>();

    public TriValueVirtualCheckBox() : base()
    {        
        Text = this.GetType().Name;

        int index = 0;
        for(index=0; index<=initialSize; index++)
            store.Add(index, LightStatus.Unknown);

        Controls.Add(dataGridView1);
        dataGridView1.VirtualMode = true;
        dataGridView1.AllowUserToDeleteRows = false;
        dataGridView1.CellValueNeeded += new 
            DataGridViewCellValueEventHandler(dataGridView1_CellValueNeeded);
        dataGridView1.CellValuePushed += new 
            DataGridViewCellValueEventHandler(dataGridView1_CellValuePushed);

        dataGridView1.Columns.Add(CreateCheckBoxColumn());
        dataGridView1.Rows.AddCopies(0, initialSize);
    }

    private DataGridViewCheckBoxColumn CreateCheckBoxColumn()
    {
        DataGridViewCheckBoxColumn dataGridViewCheckBoxColumn1 
            = new DataGridViewCheckBoxColumn();
        dataGridViewCheckBoxColumn1.HeaderText = "Lights On";
        dataGridViewCheckBoxColumn1.TrueValue = LightStatus.TurnedOn;
        dataGridViewCheckBoxColumn1.FalseValue = LightStatus.TurnedOff;
        dataGridViewCheckBoxColumn1.IndeterminateValue 
            = LightStatus.Unknown;
        dataGridViewCheckBoxColumn1.ThreeState = true;
        dataGridViewCheckBoxColumn1.ValueType = typeof(LightStatus);
        return dataGridViewCheckBoxColumn1;
    }

#region "data store maintance"
    private void dataGridView1_CellValueNeeded(object sender, 
        DataGridViewCellValueEventArgs e)
    {
        e.Value = store[e.RowIndex];
    }

    private void dataGridView1_CellValuePushed(object sender, 
        DataGridViewCellValueEventArgs e)
    {
        store[e.RowIndex] = (LightStatus) e.Value;
    }
#endregion

    [STAThreadAttribute()]
    public static void Main()
    {
        Application.Run(new TriValueVirtualCheckBox());
    }
}

public enum LightStatus
{
    Unknown, 
    TurnedOn, 
    TurnedOff
};

Imports System.IO
Imports System.Collections.Generic
Imports System.Windows.Forms

Public Class TriValueVirtualCheckBox
    Inherits System.Windows.Forms.Form

    Dim WithEvents dataGridView1 As New DataGridView

    Const initialSize As Integer = 500

    Dim store As New Dictionary(Of Integer, LightStatus)

    Public Sub New()
        MyBase.New()
        Text = Me.GetType().Name

        Dim index As Integer = 0
        For index = 0 To initialSize
            store.Add(index, LightStatus.Unknown)
        Next

        Controls.Add(dataGridView1)
        dataGridView1.VirtualMode = True
        dataGridView1.AllowUserToDeleteRows = False
        dataGridView1.Columns.Add(CreateCheckBoxColumn())
        dataGridView1.Rows.AddCopies(0, initialSize)
    End Sub

    Private Function CreateCheckBoxColumn() As DataGridViewCheckBoxColumn
        Dim dataGridViewCheckBoxColumn1 _
            As New DataGridViewCheckBoxColumn()
        dataGridViewCheckBoxColumn1.HeaderText = "Lights On"
        dataGridViewCheckBoxColumn1.TrueValue = LightStatus.TurnedOn
        dataGridViewCheckBoxColumn1.FalseValue = LightStatus.TurnedOff
        dataGridViewCheckBoxColumn1.IndeterminateValue = _
            LightStatus.Unknown
        dataGridViewCheckBoxColumn1.ThreeState = True
        dataGridViewCheckBoxColumn1.ValueType = GetType(LightStatus)
        Return dataGridViewCheckBoxColumn1
    End Function

#Region "data store maintance"
    Private Sub dataGridView1_CellValueNeeded(ByVal sender As Object, _
        ByVal e As DataGridViewCellValueEventArgs) _
        Handles dataGridView1.CellValueNeeded

        e.Value = store(e.RowIndex)
    End Sub

    Private Sub dataGridView1_CellValuePushed(ByVal sender As Object, _
        ByVal e As DataGridViewCellValueEventArgs) _
        Handles dataGridView1.CellValuePushed

        store.Item(e.RowIndex) = CType(e.Value, LightStatus)
    End Sub
#End Region

    <STAThreadAttribute()> _
    Public Shared Sub Main()
        Application.Run(New TriValueVirtualCheckBox())
    End Sub
End Class

Public Enum LightStatus
    Unknown
    TurnedOn
    TurnedOff
End Enum

설명

알 수 없는 상태가 유용할 수 있습니다, 예를 들어, 확인란에 기본값을 설정 하지 않을 경우.The indeterminate state can be useful, for example, when you do not want to set a default value in the check box.

거사 설정 받기 또는이 속성을 설정 합니다 ThreeState 반환 하는 셀 개체의 속성을 CellTemplate 속성.Getting or setting this property gets or sets the ThreeState property of the cell object returned by the CellTemplate property. 이 속성을 설정 집합을 ThreeState 속성 새로 고침 및 열에 있는 모든 셀의 열을 표시 합니다.Setting this property also sets the ThreeState property of every cell in the column and refreshes the column display. 열 값을 설정 하면 개별 셀에 대해 지정된 된 값을 재정의 하려면 셀 값을 설정 합니다.To override the specified value for individual cells, set the cell values after you set the column value.

경우는 NullValue 반환 하는 개체의 속성을 DefaultCellStyle 속성의 값이 false변경는 ThreeState 속성 값을 true 자동으로 설정 NullValueIndeterminate.If the NullValue property of the object returned by the DefaultCellStyle property has a value of false, changing the ThreeState property value to true automatically sets NullValue to Indeterminate. 경우 NullValue 값이 Indeterminate을 변경 합니다 ThreeState 속성 값을 false 자동으로 설정 NullValuefalse입니다.If NullValue has a value of Indeterminate, changing the ThreeState property value to false automatically sets NullValue to false.

적용 대상

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