Question

我有这个方法：

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

我有时会通过@ Html.ActionLink调用它，有时候通过单击表中具有“clickableCell”类的单元格来调用它。如果它是链接，如何检查发件人是什么？

两种情况下的类型都是WebClient。

Answer 1

您可以在调用时传递用户状态对象：

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;
    ...
}

检查发件人是否为@ Html.ActionLink

1 个答案: