檢查發件人是否@ Html.ActionLink

Question

我有這樣的方法：

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

我有時通過調用它@ Html.ActionLink，有時通過點擊表格的單元格，其具有類'clickableCell'。 如何檢查發件人是什麼，如果是鏈接？

它的類型都是WebClient。

Answer 1

調用它時你可以傳遞一個用戶狀態對象：

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); 

然後：

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