private void ContextMenuStripOnOpening(object sender, CancelEventArgs e)
{
TextBoxContextMenuStrip textBoxContextMenuStrip = sender as TextBoxContextMenuStrip;
textBox = (TextBox)textBoxContextMenuStrip.SourceControl;
if (textBoxContextMenuStrip != null)
{
textBoxContextMenuStrip.Redo.Enabled = (_RevokeText != "");
textBoxContextMenuStrip.Undo.Enabled = textBox.CanUndo;
textBoxContextMenuStrip.Cut.Enabled = !string.IsNullOrEmpty(textBox.SelectedText);
textBoxContextMenuStrip.Copy.Enabled = !string.IsNullOrEmpty(textBox.SelectedText);
textBoxContextMenuStrip.Paste.Enabled = Clipboard.ContainsText();
textBoxContextMenuStrip.Delete.Enabled = !string.IsNullOrEmpty(textBox.SelectedText);
textBoxContextMenuStrip.SelectAll.Enabled = !string.IsNullOrEmpty(textBox.Text);
}
}
private void TextBoxContextMenuStrip_ItemClicked(object sender, ToolStripItemClickedEventArgs e)
{
TextBoxContextMenuStrip textBoxContextMenuStrip = this;
//TextBox textBox = (TextBox)textBoxContextMenuStrip.SourceControl;
string text = e.ClickedItem.Text;
switch (text)
{
default:
if (text == "全选")
{
textBox.SelectAll();
}
break;
case "撤销":
_RevokeText = textBox.Text;
textBox.Undo();
break;
case "重做":
textBox.Text = _RevokeText;
textBox.SelectionStart = _RevokeText.Length;
_RevokeText = "";
break;
case "剪切":
textBox.Cut();
break;
case "复制":
textBox.Copy();
break;
case "粘贴":
textBox.Paste();
break;
case "删除":
textBox.SelectedText = string.Empty;
break;
}
}
