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private void button1_Click(object sender, EventArgs e)
{
this.textBox1.Undo();
}
http://www.codeproject.com/KB/cs/undo_support.aspx
indexof
private void button1_Click(object sender, EventArgs e)
{
this.textBox1.Undo();
}
http://www.codeproject.com/KB/cs/undo_support.aspx
private void menuItemUndo_Click(object sender, System.EventArgs e)
{
//当textBoxEdit可以进行撤消操作时
if(textBoxEdit.CanUndo==true)
{
//调用TextBoxEdit.undo()方法,撤消上一次操作
textBoxEdit.Undo(); //清除缓冲区中有关撤消操作的信息
textBoxEdit.ClearUndo();
}
} //剪切操作
private void menuItemCut_Click(object sender, System.EventArgs e)
{
//如果文本框中选择的文本非空
if(this.textBoxEdit.SelectedText!="")
{
//剪切选中的文本
this.textBoxEdit.Cut();
}
}