找出选择
if (textbox1.SelectionLength > 0)
{
}
对于剪贴板内容,使用
System.Windows.Forms.Clipboard.getText();
检查剪贴板内容,
IDataObject iData = Clipboard.GetDataObject();
// Is Data Text?
if (iData.GetDataPresent(DataFormats.Text))
label1.Text = (String)iData.GetData(DataFormats.Text);
else
label1.Text = "Data not found.";
这是在代码中实现的。可以如上直接使用
最重要的别忘了
public virtual string SelectedText { get; set; }
这是带有菜单项的完整代码
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.Length > 0)
// 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))
{
// 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();
}
}