public static async Task<string> GetData(string url, string data)
{
UriBuilder fullUri = new UriBuilder(url);
if (!string.IsNullOrEmpty(data))
fullUri.Query = data;
HttpClient client = new HttpClient();
HttpResponseMessage response = await client.PostAsync(new Uri(url), /*expects HttpContent*/);
response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
response.EnsureSuccessStatusCode();
string responseBody = await response.Content.ReadAsStringAsync();
return responseBody;
}
PostAsync
需要另一个参数HttpContent
.
如何设置
HttpContent
?没有适用于 Windows Phone 8 的文档。
如果我这样做
GetAsync
,效果很好!但它需要使用 key="bla", something="yay" 的内容进行 POST
//编辑
非常感谢您的回答...这很好用,但这里仍有一些不确定因素:
public static async Task<string> GetData(string url, string data)
{
data = "test=something";
HttpClient client = new HttpClient();
StringContent queryString = new StringContent(data);
HttpResponseMessage response = await client.PostAsync(new Uri(url), queryString );
//response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
response.EnsureSuccessStatusCode();
string responseBody = await response.Content.ReadAsStringAsync();
return responseBody;
}
我假设数据“test=something”会在 api 端作为发布数据“test”获取,显然它不会。另一方面,我可能需要通过发布数据发布整个对象/数组,所以我认为 json 最好这样做。关于如何通过发布数据有什么想法吗?
也许是这样的:
class SomeSubData
{
public string line1 { get; set; }
public string line2 { get; set; }
}
class PostData
{
public string test { get; set; }
public SomeSubData lines { get; set; }
}
PostData data = new PostData {
test = "something",
lines = new SomeSubData {
line1 = "a line",
line2 = "a second line"
}
}
StringContent queryString = new StringContent(data); // But obviously that won't work
这在 找不到如何使用 HttpContent 以及这篇 博文 的一些答案中得到了回答。
综上所述,不能直接设置
HttpContent
的实例,因为它是一个抽象类。您需要根据需要使用从它派生的类之一。最有可能是 StringContent
,它允许您在构造函数中设置响应的字符串值、编码和媒体类型。请参阅:http://msdn.microsoft.com/en-us/library/system.net.http.stringcontent.aspx
要添加到普雷斯顿的答案中,这里是标准库中可用的
HttpContent
派生类的完整列表:
信用:https://pfelix.wordpress.com/2012/01/16/the-new-system-net-http-classes-message-content/
还有一个假设的
ObjectContent
,但我无法在ASP.NET Core
中找到它。
当然,你可以跳过整个
HttpContent
的东西连同 Microsoft.AspNet.WebApi.Client
扩展(你现在必须做一个导入才能让它在 ASP.NET Core 中工作:https://github.com /aspnet/Home/issues/1558),然后您可以执行以下操作:
var response = await client.PostAsJsonAsync("AddNewArticle", new Article
{
Title = "New Article Title",
Body = "New Article Body"
});
更新: 对于框架版本 5+,通过:
using System.Net.Http.Json
没有任何导入,你可以使用 use:
await client.PostAsJsonAsync("url", new { });
public async Task<ActionResult> Index()
{
apiTable table = new apiTable();
table.Name = "Zainab Nazakat";
table.Roll = "6655";
string str = "";
string str2 = "";
HttpClient client = new HttpClient();
string json = JsonConvert.SerializeObject(table); //using Newtonsoft.Json
StringContent httpContent = new StringContent(json, System.Text.Encoding.UTF8, "application/json");
var response = await client.PostAsync("http://YourSite.com/api/apiTables", httpContent);
str = "" + response.Content + " : " + response.StatusCode;
if (response.IsSuccessStatusCode)
{
str2 = "Data Posted";
}
return View();
}