TextBoxBase.SelectedText プロパティ

[アーティクル]
08/14/2007

コントロールで現在選択されているテキストを示す値を取得または設定します。

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

構文

'宣言
Public Overridable Property SelectedText As String
'使用
Dim instance As TextBoxBase
Dim value As String

value = instance.SelectedText

instance.SelectedText = value

public virtual string SelectedText { get; set; }

public:
virtual property String^ SelectedText {
    String^ get ();
    void set (String^ value);
}

/** @property */
public String get_SelectedText ()

/** @property */
public void set_SelectedText (String value)

public function get SelectedText () : String

public function set SelectedText (value : String)

プロパティ値

テキストボックスで現在選択されているテキストを表す文字列。

解説

このプロパティにテキストを代入すると、テキストボックスで現在選択されているテキストを変更できます。テキストボックスでテキストが選択されていない場合、このプロパティは長さ 0 の文字列を返します。

使用例

派生クラス TextBox を使用するコード例を次に示します。切り取り、コピー、貼り付け、元に戻すなどの各操作を実行する MenuItem オブジェクトの Click イベントハンドラを用意します。この例では、textBox1 という名前の TextBox コントロールが作成されている必要があります。

Private Sub Menu_Copy(sender As System.Object, e As System.EventArgs)
    ' Ensure that text is selected in the text box.   
    If textBox1.SelectionLength > 0 Then
        ' Copy the selected text to the Clipboard.
        textBox1.Copy()
    End If
End Sub
    
Private Sub Menu_Cut(sender As System.Object, e As System.EventArgs)
    ' Ensure that text is currently selected in the text box.   
    If textBox1.SelectedText <> "" Then
        ' Cut the selected text in the control and paste it into the Clipboard.
        textBox1.Cut()
    End If
End Sub
    
Private Sub Menu_Paste(sender As System.Object, e As System.EventArgs)
    ' Determine if there is any text in the Clipboard to paste into the text box.
    If Clipboard.GetDataObject().GetDataPresent(DataFormats.Text) = True Then
        ' Determine if any text is selected in the text box.
        If textBox1.SelectionLength > 0 Then
            ' Ask user if they want to paste over currently selected text.
            If MessageBox.Show("Do you want to paste over current selection?", _
               "Cut Example", MessageBoxButtons.YesNo) = DialogResult.No Then
                ' Move selection to the point after the current selection and paste.
                textBox1.SelectionStart = textBox1.SelectionStart + _
                   textBox1.SelectionLength
            End If
        End If 
        ' Paste current text in Clipboard into text box.
        textBox1.Paste()
    End If
End Sub
   
Private Sub Menu_Undo(sender As System.Object, e As System.EventArgs)
    ' Determine if last operation can be undone in text box.   
    If textBox1.CanUndo = True Then
        ' Undo the last operation.
        textBox1.Undo()
        ' Clear the undo buffer to prevent last action from being redone.
        textBox1.ClearUndo()
    End If
End Sub

private void Menu_Copy(System.Object sender, System.EventArgs e)
 {
    // Ensure that text is selected in the text box.   
    if(textBox1.SelectionLength > 0)
        // Copy the selected text to the Clipboard.
        textBox1.Copy();
 }
 
 private void Menu_Cut(System.Object sender, System.EventArgs e)
 {   
     // Ensure that text is currently selected in the text box.   
     if(textBox1.SelectedText != "")
        // Cut the selected text in the control and paste it into the Clipboard.
        textBox1.Cut();
 }
 
 private void Menu_Paste(System.Object sender, System.EventArgs e)
 {
    // Determine if there is any text in the Clipboard to paste into the text box.
    if(Clipboard.GetDataObject().GetDataPresent(DataFormats.Text) == true)
    {
        // Determine if any text is selected in the text box.
        if(textBox1.SelectionLength > 0)
        {
          // Ask user if they want to paste over currently selected text.
          if(MessageBox.Show("Do you want to paste over current selection?", "Cut Example", MessageBoxButtons.YesNo) == DialogResult.No)
             // Move selection to the point after the current selection and paste.
             textBox1.SelectionStart = textBox1.SelectionStart + textBox1.SelectionLength;
        }
        // Paste current text in Clipboard into text box.
        textBox1.Paste();
    }
 }
 
 
 private void Menu_Undo(System.Object sender, System.EventArgs e)
 {
    // Determine if last operation can be undone in text box.   
    if(textBox1.CanUndo == true)
    {
       // Undo the last operation.
       textBox1.Undo();
       // Clear the undo buffer to prevent last action from being redone.
       textBox1.ClearUndo();
    }
 }

private:
   void Menu_Copy( System::Object^ sender, System::EventArgs^ e )
   {
      // Ensure that text is selected in the text box.   
      if ( textBox1->SelectionLength > 0 )
         // Copy the selected text to the Clipboard.
         textBox1->Copy();
   }

   void Menu_Cut( System::Object^ sender, System::EventArgs^ e )
   {
      // Ensure that text is currently selected in the text box.   
      if ( !textBox1->SelectedText->Equals( "" ) )
      {
         // Cut the selected text in the control and paste it into the Clipboard.
         textBox1->Cut();
      }
   }

   void Menu_Paste( System::Object^ sender, System::EventArgs^ e )
   {
      // Determine if there is any text in the Clipboard to paste into the text box.
      if ( Clipboard::GetDataObject()->GetDataPresent( DataFormats::Text ) == true )
      {
         // Determine if any text is selected in the text box.
         if ( textBox1->SelectionLength > 0 )
         {
            // Ask user if they want to paste over currently selected text.
            if ( MessageBox::Show( "Do you want to paste over current selection?",
               "Cut Example", MessageBoxButtons::YesNo ) == ::DialogResult::No )
            {
               // Move selection to the point after the current selection and paste.
               textBox1->SelectionStart = textBox1->SelectionStart + textBox1->SelectionLength;
            }
         }
         // Paste current text in Clipboard into text box.
         textBox1->Paste();
      }
   }

   void Menu_Undo( System::Object^ sender, System::EventArgs^ e )
   {
      // Determine if last operation can be undone in text box.   
      if ( textBox1->CanUndo == true )
      {
         // Undo the last operation.
         textBox1->Undo();
         // Clear the undo buffer to prevent last action from being redone.
         textBox1->ClearUndo();
      }
   }

private void Menu_Copy(Object sender, System.EventArgs e)
{
    // Ensure that text is selected in the text box.   
    if (textBox1.get_SelectionLength() > 0) {
        // Copy the selected text to the Clipboard.
        textBox1.Copy();
    }
} //Menu_Copy

private void Menu_Cut(Object sender, System.EventArgs e)
{
    // Ensure that text is currently selected in the text box.   
    if (!(textBox1.get_SelectedText().Equals(""))) {
        // Cut the selected text in the control and paste it 
        // into the Clipboard.
        textBox1.Cut();
    }
} //Menu_Cut

private void Menu_Paste(Object sender, System.EventArgs e)
{
    // Determine if there is any text in the Clipboard to paste 
    // into the text box.
    if(Clipboard.GetDataObject().GetDataPresent(DataFormats.Text) == true) {
        // Determine if any text is selected in the text box.
        if (textBox1.get_SelectionLength() > 0) {
            // Ask user if they want to paste over currently selected text.
            if (MessageBox.Show("Do you want to paste over current "
                + "selection?", "Cut Example",
                MessageBoxButtons.YesNo).Equals(get_DialogResult().No)) {
                // Move selection to the point after the current selection
                // and paste.
                textBox1.set_SelectionStart(textBox1.get_SelectionStart() 
                    + textBox1.get_SelectionLength());
            }
        }
        // Paste current text in Clipboard into text box.
        textBox1.Paste();
    }
} //Menu_Paste

private void Menu_Undo(Object sender, System.EventArgs e)
{
    // Determine if last operation can be undone in text box.   
    if (textBox1.get_CanUndo() == true) {
        // Undo the last operation.
        textBox1.Undo();
        // Clear the undo buffer to prevent last action from being redone.
        textBox1.ClearUndo();
    }
} //Menu_Undo

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。

次の方法で共有

TextBoxBase.SelectedText プロパティ

構文

プロパティ値

解説

使用例

プラットフォーム

バージョン情報

.NET Framework

.NET Compact Framework

参照

関連項目

その他のリソース