在C＃中剪切，複製並粘貼？

Question

我有很多文本框。我有一個按鈕可以剪切Focused文本框的選定文本。我怎麼做？我曾經嘗試這樣做：

 if (((TextBox)(pictureBox1.Controls[0])).SelectionLength > 0) 
     { 
      ((TextBox)(pictureBox1.Controls[0])).Cut(); 
     } 

Answer 1

環路通過控制來找到一個與所選文本：

foreach (Control x in this.PictureBox1.Controls) 
{ 
    if (x is TextBox) 
    { 
     if (((TextBox)x).SelectionLength > 0) 
     { 
      ((TextBox)(x).Cut(); // Or some other method to get the text. 
     } 
    } 
} 

希望這有助於！

Answer 2

希望它的WinForms

var textboxes = (from textbox in this.Controls.OfType<TextBox>() 
        where textbox.SelectedText != string.Empty 
        select textbox).FirstOrDefault(); 
if (textboxes != null) 
{ 
    textboxes.Cut(); 
} 

Answer 3

嘗試使用常見的Enter和Leave事件來設置具有焦點的最後一個TextBox。

private void textBox_Enter(object sender, EventArgs e) 
{ 
    focusedTextBox = null; 
} 

private void textBox_Leave(object sender, EventArgs e) 
{ 
    focusedTextBox = (TextBox)sender; 
} 

private void button1_Click(object sender, EventArgs e) 
{ 
    if (!(focusedTextBox == null)) 
    { 
     if (focusedTextBox.SelectionLength > 0) 
     { 
      Clipboard.SetText(focusedTextBox.SelectedText); 
      focusedTextBox.SelectedText = ""; 
      focusedTextBox = null; 
     } 
    } 
}