检查发件人是否@ Html.ActionLink

Question

我有这样的方法：

void myMethod(object sender, DownloadStringCompletedEventArgs e) 
   {...} 

我有时通过调用它@ Html.ActionLink，有时通过点击表格的单元格，其具有类'clickableCell'。 如何检查发件人是什么，如果是链接？

它的类型都是WebClient。

Answer 1

调用它时你可以传递一个用户状态对象：

var client = new WebClient(); 
client.DownloadStringCompleted += myMethod; 

// You could pass any object 
string state = "foo bar"; 

client.DownloadStringAsync(new Uri("http://foo.bar.com"), state); 

然后：

void myMethod(object sender, DownloadStringCompletedEventArgs e) 
{ 
    // will equal "foo bar" 
    string state = e.UserState as string; 
    ... 
}