PictureBox.SizeMode プロパティ

.NET Framework クラス ライブラリ リファレンス

PictureBox.SizeMode プロパティ

イメージの表示方法を示します。

名前空間: System.Windows.Forms
アセンブリ: System.Windows.Forms (system.windows.forms.dll 内)
構文

Visual Basic (宣言)

<LocalizableAttribute(True)> _
Public Property SizeMode As
 PictureBoxSizeMode

Visual Basic (使用法)

Dim instance As PictureBox
Dim value As PictureBoxSizeMode

value = instance.SizeMode

instance.SizeMode = value

C#

[LocalizableAttribute(true)] 
public PictureBoxSizeMode SizeMode { get; set;
 }

C++

[LocalizableAttribute(true)] 
public:
property PictureBoxSizeMode SizeMode {
    PictureBoxSizeMode get ();
    void set (PictureBoxSizeMode value);
}

J#

/** @property */
public PictureBoxSizeMode get_SizeMode ()

/** @property */
public void set_SizeMode (PictureBoxSizeMode
 value)

JScript

public function get SizeMode
 () : PictureBoxSizeMode

public function set SizeMode
 (value : PictureBoxSizeMode)

プロパティ値
PictureBoxSizeMode 値の 1 つ。既定値は Normal です。

例外

例外の種類	条件
InvalidEnumArgumentException	代入された値が、PictureBoxSizeMode 値ではありません。

解説

このプロパティの有効値は、PictureBoxSizeMode 列挙体から取得されます。既定の Normal モードでは、Image が PictureBox の左上隅に配置され、PictureBox に対して大きすぎるイメージ部分はクリップされます。StretchImage 値を使用すると、PictureBox に合わせてイメージの大きさが調整されます。

AutoSize 値を使用すると、コントロールのサイズがイメージに合わせて随時調整されます。CenterImage 値を使用すると、イメージがクライアント領域の中央に配置されます。

使用例

PictureBox コントロールと ListView コントロールの使用方法を示すコード例を次に示します。PictureBox は、BorderStyle プロパティ (BorderStyle 列挙体を使用) と SizeMode プロパティ (PictureBoxSizeMode 列挙体を使用) を設定することにより初期化されます。ListView には、Samples Pictures ディレクトリからイメージが読み込まれます。ListView コントロールの MouseDown イベントを処理して項目が選択されているかどうかを判断する場合は、ListView.GetItemAt メソッドを使用します。項目が選択されている場合、その項目は、イベント ハンドラが Image プロパティを設定することにより表示されます。この例では、C:\Documents and Settings\All Users\Documents\My Pictures\Sample Pictures ディレクトリに JPG ファイルが存在していることを前提としています。この例を実行するには、コードをフォームに貼り付けて、フォームのコンストラクタまたは Load イベント処理メソッドで InitializePictureBox メソッドおよび PopulateListView メソッドを呼び出します。必ずすべてのイベントをイベント処理メソッドに関連付けるようにしてください。

Visual Basic

Private Sub PopulateListView()
    ListView1.Width = 270
    ListView1.Location = New System.Drawing.Point(10, 10)

    ' Declare and construct the ColumnHeader objects.
    Dim header1, header2 As ColumnHeader
    header1 = New ColumnHeader
    header2 = New ColumnHeader

    ' Set the text, alignment and width for each column header.
    header1.Text = "File name"
    header1.TextAlign = HorizontalAlignment.Left
    header1.Width = 70

    header2.TextAlign = HorizontalAlignment.Left
    header2.Text = "Location"
    header2.Width = 200

    ' Add the headers to the ListView control.
    ListView1.Columns.Add(header1)
    ListView1.Columns.Add(header2)

    ' Populate the ListView.Items property.
    ' Set the directory to the sample picture directory.
    Dim dirInfo As New System.IO.DirectoryInfo
 _
        ("C:\Documents and Settings\All Users" _
        & "\Documents\My Pictures\Sample Pictures")
    Dim file As System.IO.FileInfo

    ' Get the .jpg files from the directory
    Dim files() As System.io.FileInfo = dirInfo.GetFiles("*.jpg")

    ' Add each file name and full name including path
    ' to the ListView.
    If Not (files Is Nothing)
 Then
        For Each file In
 files
            Dim item As New
 ListViewItem(file.Name)
            item.SubItems.Add(file.FullName)
            ListView1.Items.Add(item)
        Next
    End If
End Sub

Private Sub InitializePictureBox()
    PictureBox1 = New PictureBox

    ' Set the location and size of the PictureBox control.
    Me.PictureBox1.Location = New System.Drawing.Point(70,
 120)
    Me.PictureBox1.Size = New System.Drawing.Size(140,
 140)
    Me.PictureBox1.TabStop = False

    ' Set the SizeMode property to the StretchImage value.  This
    ' will shrink or enlarge the image as needed to fit into
    ' the PictureBox.
    Me.PictureBox1.SizeMode = PictureBoxSizeMode.StretchImage

    ' Set the border style to a three-dimensional border.
    Me.PictureBox1.BorderStyle = BorderStyle.Fixed3D

    ' Add the PictureBox to the form.
    Me.Controls.Add(Me.PictureBox1)

End Sub


Private Sub ListView1_MouseDown(ByVal
 sender As Object, _
    ByVal e As MouseEventArgs) Handles
 ListView1.MouseDown

    Dim selection As ListViewItem = ListView1.GetItemAt(e.X,
 e.Y)

    ' If the user selects an item in the ListView, display
    ' the image in the PictureBox.
    If Not (selection Is
 Nothing) Then
        PictureBox1.Image = System.Drawing.Image.FromFile _
            (selection.SubItems(1).Text)
    End If


End Sub

C#

private void PopulateListView()
{
    ListView1.Width = 270;
    ListView1.Location = new System.Drawing.Point(10, 10);

    // Declare and construct the ColumnHeader objects.
    ColumnHeader header1, header2;
    header1 = new ColumnHeader();
    header2 = new ColumnHeader();

    // Set the text, alignment and width for each column header.
    header1.Text = "File name";
    header1.TextAlign = HorizontalAlignment.Left;
    header1.Width = 70;

    header2.TextAlign = HorizontalAlignment.Left;
    header2.Text = "Location";
    header2.Width = 200;

    // Add the headers to the ListView control.
    ListView1.Columns.Add(header1);
    ListView1.Columns.Add(header2);

    // Populate the ListView.Items property.
    // Set the directory to the sample picture directory.
    System.IO.DirectoryInfo dirInfo = 
        new System.IO.DirectoryInfo(
        "C:\\Documents and Settings\\All Users" +
        "\\Documents\\My Pictures\\Sample Pictures");
    

    // Get the .jpg files from the directory
    System.IO.FileInfo[] files = dirInfo.GetFiles("*.jpg");

    // Add each file name and full name including path
    // to the ListView.
    if (files != null)
    {
        foreach ( System.IO.FileInfo file in
 files )
        {
            ListViewItem item = new ListViewItem(file.Name);
            item.SubItems.Add(file.FullName);
            ListView1.Items.Add(item);
        }
    }
}

private void InitializePictureBox()
{
    PictureBox1 = new PictureBox();

    // Set the location and size of the PictureBox control.
    this.PictureBox1.Location = new System.Drawing.Point(70,
 120);
    this.PictureBox1.Size = new System.Drawing.Size(140,
 140);
    this.PictureBox1.TabStop = false;

    // Set the SizeMode property to the StretchImage value.  This
    // will shrink or enlarge the image as needed to fit into
    // the PictureBox.
    this.PictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;

    // Set the border style to a three-dimensional border.
    this.PictureBox1.BorderStyle = BorderStyle.Fixed3D;

    // Add the PictureBox to the form.
    this.Controls.Add(this.PictureBox1);

}


private void ListView1_MouseDown(object sender,
 MouseEventArgs e)
{

    ListViewItem selection = ListView1.GetItemAt(e.X, e.Y);

    // If the user selects an item in the ListView, display
    // the image in the PictureBox.
    if (selection != null)
    {
        PictureBox1.Image = System.Drawing.Image.FromFile(
            selection.SubItems[1].Text);
    }
}

C++

private:
   void PopulateListView()
   {
      ListView1->Width = 270;
      ListView1->Location = System::Drawing::Point( 10, 10 );
      
      // Declare and construct the ColumnHeader objects.
      ColumnHeader^ header1;
      ColumnHeader^ header2;
      header1 = gcnew ColumnHeader;
      header2 = gcnew ColumnHeader;
      
      // Set the text, alignment and width for each column header.
      header1->Text = "File name";
      header1->TextAlign = HorizontalAlignment::Left;
      header1->Width = 70;
      header2->TextAlign = HorizontalAlignment::Left;
      header2->Text = "Location";
      header2->Width = 200;
      
      // Add the headers to the ListView control.
      ListView1->Columns->Add( header1 );
      ListView1->Columns->Add( header2 );
      
      // Populate the ListView.Items property.
      // Set the directory to the sample picture directory.
      System::IO::DirectoryInfo^ dirInfo = gcnew System::IO::DirectoryInfo( "C:\\Documents
 and Settings\\All Users"
      "\\Documents\\My Pictures\\Sample Pictures" );
      
      // Get the .jpg files from the directory
      array<System::IO::FileInfo^>^files = dirInfo->GetFiles( "*.jpg"
 );
      
      // Add each file name and full name including path
      // to the ListView.
      if ( files != nullptr )
      {
         System::Collections::IEnumerator^ myEnum = files->GetEnumerator();
         while ( myEnum->MoveNext() )
         {
            System::IO::FileInfo^ file = safe_cast<System::IO::FileInfo^>(myEnum->Current);
            ListViewItem^ item = gcnew ListViewItem( file->Name );
            item->SubItems->Add( file->FullName );
            ListView1->Items->Add( item );
         }
      }
   }

   void InitializePictureBox()
   {
      PictureBox1 = gcnew PictureBox;
      
      // Set the location and size of the PictureBox control.
      this->PictureBox1->Location = System::Drawing::Point(
 70, 120 );
      this->PictureBox1->Size = System::Drawing::Size( 140,
 140 );
      this->PictureBox1->TabStop = false;
      
      // Set the SizeMode property to the StretchImage value.  This
      // will shrink or enlarge the image as needed to fit into
      // the PictureBox.
      this->PictureBox1->SizeMode = PictureBoxSizeMode::StretchImage;
      
      // Set the border style to a three-dimensional border.
      this->PictureBox1->BorderStyle = BorderStyle::Fixed3D;
      
      // Add the PictureBox to the form.
      this->Controls->Add( this->PictureBox1
 );
   }

   void ListView1_MouseDown( Object^ /*sender*/, MouseEventArgs^
 e )
   {
      ListViewItem^ selection = ListView1->GetItemAt( e->X, e->Y );
      
      // If the user selects an item in the ListView, display
      // the image in the PictureBox.
      if ( selection != nullptr )
      {
         PictureBox1->Image = System::Drawing::Image::FromFile( selection->SubItems[
 1 ]->Text );
      }
   }

J#

private void PopulateListView()
{
    listView1.set_Width(270);
    listView1.set_Location(new System.Drawing.Point(10, 10));
    // Declare and construct the ColumnHeader objects.
    ColumnHeader header1, header2;
    header1 = new ColumnHeader();
    header2 = new ColumnHeader();
    // Set the text, alignment and width for each column header.
    header1.set_Text("File name");
    header1.set_TextAlign(HorizontalAlignment.Left);
    header1.set_Width(70);

    header2.set_TextAlign(HorizontalAlignment.Left);
    header2.set_Text("Location");
    header2.set_Width(200);
    // Add the headers to the ListView control.
    listView1.get_Columns().Add(header1);
    listView1.get_Columns().Add(header2);
    // Populate the ListView.Items property.
    // Set the directory to the sample picture directory.
    System.IO.DirectoryInfo dirInfo =
        new System.IO.DirectoryInfo("C:\\Documents and Settings\\All
 Users"
        + "\\Documents\\My Pictures\\Sample Pictures");
    // Get the.jpg files from the directory
    System.IO.FileInfo files[] = dirInfo.GetFiles("*.jpg");
    // Add each file name and full name including path
    // to the ListView.
    if (files != null) {
        for (int iCtr = 0; iCtr < files.length;
 iCtr++) {
            System.IO.FileInfo file = files[iCtr];
            ListViewItem item = new ListViewItem(file.get_Name());
            item.get_SubItems().Add(file.get_FullName());
            listView1.get_Items().Add(item);
        }
    }
} //PopulateListView

private void InitializePictureBox()
{
    pictureBox1 = new PictureBox();
    // Set the location and size of the PictureBox control.
    this.pictureBox1.set_Location(new System.Drawing.Point(70,
 120));
    this.pictureBox1.set_Size(new System.Drawing.Size(140,
 140));
    this.pictureBox1.set_TabStop(false);
    // Set the SizeMode property to the StretchImage value.  This
    // will shrink or enlarge the image as needed to fit into
    // the PictureBox.
    this.pictureBox1.set_SizeMode(PictureBoxSizeMode.StretchImage);
    // Set the border style to a three-dimensional border.
    this.pictureBox1.set_BorderStyle(BorderStyle.Fixed3D);
    // Add the PictureBox to the form.
    this.get_Controls().Add(this.pictureBox1);
} //InitializePictureBox

private void listView1_MouseDown(Object sender,
 MouseEventArgs e)
{
    ListViewItem selection = listView1.GetItemAt(e.get_X(), e.get_Y());
    // If the user selects an item in the ListView, display
    // the image in the PictureBox.
    if (selection != null) {
        pictureBox1.set_Image(System.Drawing.Image.FromFile(
            selection.get_SubItems().get_Item(1).get_Text()));
    }
} //listView1_MouseDown

プラットフォーム

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

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0、1.0

参照

関連項目
PictureBox クラス
PictureBox メンバ
System.Windows.Forms 名前空間
PictureBox.Image プロパティ
PictureBoxSizeMode