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我有这段代码从 WebAPI 方法中检索 json 数据，然后将其放入字符串中：

const string uri = "http://localhost:48614/api/departments";
var webRequest = (HttpWebRequest)WebRequest.Create(uri);
var webResponse = (HttpWebResponse)webRequest.GetResponse();
if ((webResponse.StatusCode == HttpStatusCode.OK) && (webResponse.ContentLength > 0))
{
    var reader = new StreamReader(webResponse.GetResponseStream());
    string s = reader.ReadToEnd();
    var nowIveGotUYouDirtyRat = fastJSON.JSON.Instance.ToObject(s);
    . . . // now what?

...但是我现在如何使用该对象化字符串来解析 json 数组的元素（它应该分配给“nowIveGotUYouDirtyRat”）？

该文档似乎将极简主义发挥到了极致，至少就如何实现这一点而言（http://www.codeproject.com/Articles/159450/fastJSON#usingcode）。

此外，虽然我下载并编译了 fastJSON net35.csproj，但生成的 .dll (fastJSON) 说它的版本是 2.0.0.0 - 不应该是 3.5.0.0 吗？（运行时版本 == v2.0.50727）

更新

Alrik，我的解决方案是切换到 JSON.NET。以下是您可以这样做的方法：

try
{
    const string uri = "http://localhost:28642/api/departments/1/42";
    var webRequest = (HttpWebRequest)WebRequest.Create(uri);
    // GET is the default method/verb, but it's here for clarity
    webRequest.Method = "GET";
    var webResponse = (HttpWebResponse)webRequest.GetResponse();
    if ((webResponse.StatusCode == HttpStatusCode.OK) && (webResponse.ContentLength > 0))
    {
        var reader = new StreamReader(webResponse.GetResponseStream());
        string s = reader.ReadToEnd();
        MessageBox.Show(string.Format("Content from HttpWebRequest is {0}", s));
        var arr = JsonConvert.DeserializeObject<JArray>(s);
        int i = 1;
        foreach (JObject obj in arr)
        {
            var id = (string)obj["Id"];
            var accountId = (double)obj["AccountId"];
            var departmentName = (string)obj["DeptName"];
            //MessageBox.Show(string.Format("Object {0} in JSON array: id == {1}, accountId == {2}, deptName == {3}", i, id, accountId, departmentName));
            i++;
        }
    }
    else
    {
        MessageBox.Show(string.Format("Status code == {0}", webResponse.StatusCode));
    }
}
catch (Exception ex)
{
    MessageBox.Show(ex.Message);
}

或者，如果您只是追求一个值：

private void buttonGetDeptCount2_Click(object sender, EventArgs e)
{
    MessageBox.Show(GetScalarVal("http://localhost:28642/api/departments/Count"));
}

private string GetScalarVal(string uri)
{
    var client = new WebClient();
    return client.DownloadString(uri);
}

注意：感谢 Jon Skeet 的惊人简单的WebClient.DownloadString()技巧。

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