ListControl.ValueMember 속성
ListControl에서 항목의 실제 값으로 사용할 속성을 가져오거나 설정합니다.
네임스페이스: System.Windows.Forms
어셈블리: System.Windows.Forms(system.windows.forms.dll)
구문
‘선언
Public Property ValueMember As String
‘사용 방법
Dim instance As ListControl
Dim value As String
value = instance.ValueMember
instance.ValueMember = value
public string ValueMember { get; set; }
public:
property String^ ValueMember {
String^ get ();
void set (String^ value);
}
/** @property */
public String get_ValueMember ()
/** @property */
public void set_ValueMember (String value)
public function get ValueMember () : String
public function set ValueMember (value : String)
속성 값
DataSource 속성에서 지정한 컬렉션에 포함된 개체 속성의 이름을 나타내는 String입니다. 기본값은 빈 문자열("")입니다.
예외
예외 형식 | 조건 |
---|---|
DataSource 속성에 지정한 개체에서 지정된 속성을 찾을 수 없는 경우 |
설명
데이터를 바인딩하는 경우에는 ValueMember 속성의 내용을 지정합니다.
ValueMember 속성을 빈 문자열("")이나 Null 참조(Visual Basic의 경우 Nothing)로 설정하면 이 속성을 지울 수 있습니다.
새 ValueMember 속성을 설정하면 ValueMemberChanged 및 SelectedValueChanged 이벤트가 발생합니다.
예제
다음 코드 예제에서는 ArrayList로 데이터를 로드하고 ValueMember를 목록에 있는 개체의 속성으로 설정하는 작업을 보여 줍니다.
Imports System
Imports System.Windows.Forms
Imports System.Drawing
Imports System.Collections
Public Class USState
Private myShortName As String
Private myLongName As String
Public Sub New(strLongName As String, strShortName As String)
Me.myShortName = strShortName
Me.myLongName = strLongName
End Sub 'New
Public ReadOnly Property ShortName() As String
Get
Return myShortName
End Get
End Property
Public ReadOnly Property LongName() As String
Get
Return myLongName
End Get
End Property
Public Overrides Function ToString() As String
Return Me.ShortName + " - " + Me.LongName
End Function 'ToString
End Class 'USState
Public Class ListBoxSample3
Inherits Form
Private ListBox1 As New ListBox()
Private textBox1 As New TextBox()
<STAThread()> _
Shared Sub Main()
Application.Run(New ListBoxSample3())
End Sub 'Main
Public Sub New()
Me.ClientSize = New Size(292, 181)
Me.Text = "ListBox Sample3"
ListBox1.Location = New Point(24, 16)
ListBox1.Name = "ListBox1"
ListBox1.Size = New Size(232, 130)
textBox1.Location = New Point(24, 160)
textBox1.Name = "textBox1"
textBox1.Size = New Size(240, 24)
Me.Controls.AddRange(New Control() {ListBox1, textBox1})
' Populates the list box using DataSource.
' DisplayMember is used to display just the long name of each state.
Dim USStates As New ArrayList()
USStates.Add(New USState("Alabama", "AL"))
USStates.Add(New USState("Washington", "WA"))
USStates.Add(New USState("West Virginia", "WV"))
USStates.Add(New USState("Wisconsin", "WI"))
USStates.Add(New USState("Wyoming", "WY"))
AddHandler ListBox1.SelectedValueChanged, AddressOf ListBox1_SelectedValueChanged
ListBox1.DataSource = USStates
ListBox1.DisplayMember = "LongName"
ListBox1.ValueMember = "ShortName"
End Sub 'New
Private Sub InitializeComponent()
End Sub 'InitializeComponent
Private Sub ListBox1_SelectedValueChanged(sender As Object, e As EventArgs)
If ListBox1.SelectedIndex <> - 1 Then
textBox1.Text = ListBox1.SelectedValue.ToString()
End If
End Sub 'ListBox1_SelectedValueChanged
End Class 'ListBoxSample3
using System;
using System.Windows.Forms ;
using System.Drawing ;
using System.Collections ;
namespace MyListControlSample
{
public class USState
{
private string myShortName ;
private string myLongName ;
public USState(string strLongName, string strShortName)
{
this.myShortName = strShortName;
this.myLongName = strLongName;
}
public string ShortName
{
get
{
return myShortName;
}
}
public string LongName
{
get
{
return myLongName ;
}
}
public override string ToString()
{
return this.ShortName + " - " + this.LongName;
}
}
public class ListBoxSample3:Form
{
private ListBox ListBox1 = new ListBox();
private TextBox textBox1 = new TextBox() ;
[STAThread]
static void Main()
{
Application.Run(new ListBoxSample3()) ;
}
public ListBoxSample3()
{
this.ClientSize = new Size(292, 181) ;
this.Text = "ListBox Sample3" ;
ListBox1.Location = new Point(24, 16) ;
ListBox1.Name = "ListBox1" ;
ListBox1.Size = new Size(232, 130) ;
textBox1.Location = new Point(24, 160) ;
textBox1.Name = "textBox1" ;
textBox1.Size = new Size(240, 24) ;
this.Controls.AddRange(new Control[] {ListBox1, textBox1}) ;
// Populates the list box using DataSource.
// DisplayMember is used to display just the long name of each state.
ArrayList USStates = new ArrayList() ;
USStates.Add(new USState("Alabama", "AL"));
USStates.Add(new USState("Washington", "WA")) ;
USStates.Add(new USState("West Virginia", "WV"));
USStates.Add(new USState("Wisconsin", "WI")) ;
USStates.Add(new USState("Wyoming", "WY"));
ListBox1.SelectedValueChanged += new EventHandler(ListBox1_SelectedValueChanged);
ListBox1.DataSource = USStates ;
ListBox1.DisplayMember = "LongName" ;
ListBox1.ValueMember = "ShortName" ;
}
private void InitializeComponent()
{
}
private void ListBox1_SelectedValueChanged(object sender, EventArgs e)
{
if (ListBox1.SelectedIndex != -1)
textBox1.Text = ListBox1.SelectedValue.ToString();
}
}
}
#using <System.dll>
#using <System.Drawing.dll>
#using <System.Windows.Forms.dll>
using namespace System;
using namespace System::Windows::Forms;
using namespace System::Drawing;
using namespace System::Collections;
public ref class USState
{
private:
String^ myShortName;
String^ myLongName;
public:
USState( String^ strLongName, String^ strShortName )
{
this->myShortName = strShortName;
this->myLongName = strLongName;
}
property String^ ShortName
{
String^ get()
{
return myShortName;
}
}
property String^ LongName
{
String^ get()
{
return myLongName;
}
}
virtual String^ ToString() override
{
return String::Concat( this->ShortName, " - ", this->LongName );
}
};
public ref class ListBoxSample3: public Form
{
private:
ListBox^ ListBox1;
TextBox^ textBox1;
public:
ListBoxSample3()
{
ListBox1 = gcnew ListBox;
textBox1 = gcnew TextBox;
this->ClientSize = System::Drawing::Size( 292, 181 );
this->Text = "ListBox Sample3";
ListBox1->Location = Point(24,16);
ListBox1->Name = "ListBox1";
ListBox1->Size = System::Drawing::Size( 232, 130 );
textBox1->Location = Point(24,160);
textBox1->Name = "textBox1";
textBox1->Size = System::Drawing::Size( 240, 24 );
array<Control^>^temp2 = {ListBox1,textBox1};
this->Controls->AddRange( temp2 );
// Populates the list box using DataSource.
// DisplayMember is used to display just the long name of each state.
ArrayList^ USStates = gcnew ArrayList;
USStates->Add( gcnew USState( "Alabama","AL" ) );
USStates->Add( gcnew USState( "Washington","WA" ) );
USStates->Add( gcnew USState( "West Virginia","WV" ) );
USStates->Add( gcnew USState( "Wisconsin","WI" ) );
USStates->Add( gcnew USState( "Wyoming","WY" ) );
ListBox1->SelectedValueChanged += gcnew EventHandler( this, &ListBoxSample3::ListBox1_SelectedValueChanged );
ListBox1->DataSource = USStates;
ListBox1->DisplayMember = "LongName";
ListBox1->ValueMember = "ShortName";
}
void InitializeComponent(){}
private:
void ListBox1_SelectedValueChanged( Object^ /*sender*/, EventArgs^ /*e*/ )
{
if ( ListBox1->SelectedIndex != -1 )
textBox1->Text = ListBox1->SelectedValue->ToString();
}
};
[STAThread]
int main()
{
Application::Run( gcnew ListBoxSample3 );
}
package MyListControlSample;
import System.*;
import System.Windows.Forms.*;
import System.Drawing.*;
import System.Collections.*;
public class USState
{
private String myShortName;
private String myLongName;
public USState(String strLongName, String strShortName)
{
this.myShortName = strShortName;
this.myLongName = strLongName;
} //USState
/** @property
*/
public String get_ShortName()
{
return myShortName;
}//get_ShortName
/** @property
*/
public String get_LongName()
{
return myLongName;
}//get_LongName
public String ToString()
{
return this.get_ShortName() + " - " + this.get_LongName();
} //ToString
} //USState
public class ListBoxSample3 extends Form
{
private ListBox listBox1 = new ListBox();
private TextBox textBox1 = new TextBox();
/** @attribute STAThread()
*/
public static void main(String[] args)
{
Application.Run(new ListBoxSample3());
} //main
public ListBoxSample3()
{
this.set_ClientSize(new Size(292, 181));
this.set_Text("ListBox Sample3");
listBox1.set_Location(new Point(24, 16));
listBox1.set_Name("ListBox1");
listBox1.set_Size(new Size(232, 130));
textBox1.set_Location(new Point(24, 160));
textBox1.set_Name("textBox1");
textBox1.set_Size(new Size(240, 24));
this.get_Controls().AddRange(new Control[] { listBox1, textBox1 });
// Populates the list box using DataSource.
// DisplayMember is used to display just the long name of each state.
ArrayList uSStates = new ArrayList();
uSStates.Add(new USState("Alabama", "AL"));
uSStates.Add(new USState("Washington", "WA"));
uSStates.Add(new USState("West Virginia", "WV"));
uSStates.Add(new USState("Wisconsin", "WI"));
uSStates.Add(new USState("Wyoming", "WY"));
listBox1.add_SelectedValueChanged(
new EventHandler(listBox1_SelectedValueChanged));
listBox1.set_DataSource(uSStates);
listBox1.set_DisplayMember("LongName");
listBox1.set_ValueMember("ShortName");
} //ListBoxSample3
private void InitializeComponent()
{
} //InitializeComponent
private void listBox1_SelectedValueChanged(Object sender, EventArgs e)
{
if (listBox1.get_SelectedIndex() != -1) {
textBox1.set_Text(listBox1.get_SelectedValue().ToString());
}
} //listBox1_SelectedValueChanged
} //ListBoxSample3
플랫폼
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
.NET Framework에서 모든 플래폼의 모든 버전을 지원하지는 않습니다. 지원되는 버전의 목록은 시스템 요구 사항을 참조하십시오.
버전 정보
.NET Framework
2.0, 1.1, 1.0에서 지원
.NET Compact Framework
2.0, 1.0에서 지원