c# - 编写动作调用程序 - 我如何调用用户选择的方法？

Question

正如您在我的代码中看到的那样，我想将一个方法保存（设置）到一个对象中。并使用该对象调用该方法...

请看代码，您可以轻松理解；用简单的英语很难解释...

我的问题是；当然“动作操作”对象不能保存将被调用的方法。

那么，我该如何解决这个问题呢？我能做些什么？

...
    enum CampaignUserChoice
    {
        Insert,
        Update,
        Delete,
        Disable
    }


    private void AskUserAboutCampaignOperation(CampaignUserChoice choice)
    {
        string questionForUser = string.Empty;
        string questionTitleForUser = string.Empty;
        Action operation; //<<<<--------------------- this line, it's method holder

        if (choice == CampaignUserChoice.Insert)
        {
            questionForUser = "Do you want to create a new campaign?";
            questionTitleForUser = "NEW CAMPAIGN";
            operation = InsertCampaign(TakeDatasFromGui()); //<---------- set which method you want to call 
        }
        else
        {
            operation = UpdateCampaign( campaignId, TakeDatasFromGui()); 
        }
        //TODO write other elses...

        switch (MessageBox.Show(questionForUser, questionTitleForUser, MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question))
        {
            case DialogResult.Yes:
                operation; //<<<------------------ call method here...
                break;

            case DialogResult.No:
                // "No" processing
                break;

            case DialogResult.Cancel:
                // "Cancel" processing
                break;
        }
    }

非常感谢大家的回答...

Answer 1

您正在尝试使用代表：

operation = TakeDataFromGui;
...
operation();

Answer 2

使用lambda 表达式来分配委托：

operation = () => InsertCampaign(TakeDatasFromGui()); 

像常规函数一样调用动作：

operation()

Answer 3

您需要 委托来调用方法

  //declare delegate declaration same as function
   delegate returntype delegate_name(parameter1,paramenter2,..);

   //assaign function to  delegate
   delegate_name=function();

   //call function
   delagate_name();