获取或设置请求的 Content-type HTTP 标头的值。默认值为null

常见的请求内容类型为以下几种:

 1 /// <summary>
 2 /// HTTP 内容类型(Content-Type)
 3 /// </summary>
 4 public class HttpContentType
 5 {
 6     /// <summary>
 7     /// 资源类型:普通文本
 8     /// </summary>
 9     public const string TEXT_PLAIN = "text/plain";
10 
11     /// <summary>
12     /// 资源类型:JSON字符串
13     /// </summary>
14     public const string APPLICATION_JSON = "application/json";
15 
16     /// <summary>
17     /// 资源类型:未知类型(数据流)
18     /// </summary>
19     public const string APPLICATION_OCTET_STREAM = "application/octet-stream";
20 
21     /// <summary>
22     /// 资源类型:表单数据(键值对)
23     /// </summary>
24     public const string WWW_FORM_URLENCODED = "application/x-www-form-urlencoded";
25 
26     /// <summary>
27     /// 资源类型:表单数据(键值对)。编码方式为 gb2312
28     /// </summary>
29     public const string WWW_FORM_URLENCODED_GB2312 = "application/x-www-form-urlencoded;charset=gb2312";
30 
31     /// <summary>
32     /// 资源类型:表单数据(键值对)。编码方式为 utf-8
33     /// </summary>
34     public const string WWW_FORM_URLENCODED_UTF8 = "application/x-www-form-urlencoded;charset=utf-8";
35 
36     /// <summary>
37     /// 资源类型:多分部数据
38     /// </summary>
39     public const string MULTIPART_FORM_DATA = "multipart/form-data";
40 }

提交的时候可以说明编码的方式,用来使对方服务器能够正确的解析。

ContentType的属性包含请求的媒体类型。分配给ContentType属性的值在请求发送Content-typeHTTP标头时替换任何现有内容。

要清除Content-typeHTTP标头,请将ContentType属性设置为null

此属性的值存储在WebHeaderCollection中。如果设置了WebHeaderCollection,则属性值将丢失。

 参考示例代码:

 1 private HttpResult Request(string url, string data, string method, string contentType)
 2 {
 3     HttpResult httpResult = new HttpResult();
 4     HttpWebRequest httpWebRequest = null;
 5 
 6     try
 7     {
 8         httpWebRequest = WebRequest.Create(url) as HttpWebRequest;
 9         httpWebRequest.Method = method;
10         httpWebRequest.Headers = HeaderCollection;
11         httpWebRequest.CookieContainer = CookieContainer;
12 /*此属性的值存储在WebHeaderCollection中。如果设置了WebHeaderCollection,则属性值将丢失。 13 *所以放置在Headers 属性之后设置 14 */ 15 httpWebRequest.ContentType = contentType; 16 httpWebRequest.UserAgent = _userAgent; 17 httpWebRequest.AllowAutoRedirect = _allowAutoRedirect; 18 httpWebRequest.ServicePoint.Expect100Continue = false; 19 20 if (data != null) 21 { 22 httpWebRequest.AllowWriteStreamBuffering = true; 23 using (Stream requestStream = httpWebRequest.GetRequestStream()) 24 { 25 requestStream.Write(EncodingType.GetBytes(data), 0, data.Length); 26 requestStream.Flush(); 27 } 28 } 29 30 HttpWebResponse httpWebResponse = httpWebRequest.GetResponse() as HttpWebResponse; 31 if (httpWebResponse != null) 32 { 33 GetResponse(ref httpResult, httpWebResponse); 34 httpWebResponse.Close(); 35 } 36 } 37 catch (WebException webException) 38 { 39 GetWebExceptionResponse(ref httpResult, webException); 40 } 41 catch (Exception ex) 42 { 43 GetExceptionResponse(ref httpResult, ex, method, contentType); 44 } 45 finally 46 { 47 if (httpWebRequest != null) 48 { 49 httpWebRequest.Abort(); 50 } 51 } 52 53 return httpResult; 54 }

 

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文章来源: 博客园

原文链接: https://www.cnblogs.com/SavionZhang/p/11394249.html

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