将WebClient.UploadString（）替换为HttpClient.PostAsync

Question

我想在我的代码中将WebClient替换为HttpClient。 我必须在HttpClient中使用什么HttpContent来替换WebClient.UploadString？ 我的WebClient代码：

string data = string.Format("name={0}&warehouse={1}&address={2}", name, shop.Warehouse.Id, shop.Address);

using (var wc = new WebClient()) {
    wc.Headers[HttpRequestHeader.ContentType] = "application/x-www-form-urlencoded";
    wc.Encoding = Encoding.UTF8;

    string fullUrl = BaseUrl + url;
    string response = wc.UploadString(fullUrl, data);
    // ...
}

Answer 1

您可以构造postdata并在FormUrlEncodedContent的实例中使用它，如下所示：

// This is the postdata
var data = new List<KeyValuePair<string, string>>();
data.Add(new KeyValuePair<string, string>("Name", "test"));

HttpContent content = new FormUrlEncodedContent(data);

此页面上指定了解决方案：

如何使用System.Net.HttpClient发布复杂类型？

您可以决定异步或同步发布它，例如：

HttpResponseMessage x = await httpClient.PostAsync(fullUrl, content);