AE二次开发技巧之撤销、重做

//开始定义工具条  
  
IOperationStack operationStack = new ControlsOperationStackClass();  
axUndoRedoToolbar.OperationStack = operationStack;  
axUndoRedoToolbar.SetBuddyControl(mainMapControl.Object);  
axUndoRedoToolbar.Hide();  
  
//撤销  
  
 private void tlBtnUndo_Click(object sender, EventArgs e)  
{  
IOperationStack operationStack = axUndoRedoToolbar.OperationStack;  
  
//Do the following to undo the previous operation on the stack.  
try  
{  
    if (operationStack.UndoOperation != null)  
    {  
        operationStack.Undo();//调用AE自带重做指令  
    }  
    else  
    {  
        MessageBox.Show("没有可撤消的操作！");  
    }  
}  
catch (Exception ex)  
{  
    MessageBox.Show(ex.ToString(), "无可撤消操作");  
}  
}  
  
   
  
//重做       
  
private void tlBtnRedo_Click(object sender, EventArgs e)  
{  
IOperationStack operationStack = axUndoRedoToolbar.OperationStack;  
  
 try  
{  
    if (operationStack.RedoOperation == null)  
    {  
        MessageBox.Show("没有可重做的操作！");  
    }  
    else  
    {  
        operationStack.Redo();  
    }  
}  
catch (Exception ex)  
{  
    MessageBox.Show(ex.ToString(), "无可重做操作");  
}  
}