Asp.net 使用HttpWebRequest向json web服务传递参数

我在向webservice传递参数时遇到问题，除了

JSON

中的

POST

数据之外。我正在为此使用

HttpWebRequest

，下面是我迄今为止尝试过的代码，但everytime服务器返回这两个错误中的任何一个：

错误1:

{"command":null,"handle":null,"code":2003,"msg":"Required parameter missing","error":["Parameter 'login_handle' missing.","Parameter 'login_pass' missing."],"params":{"0":{"Key":"login_handle","Value":"test"},"1":{"Key":"login_pass","Value":"test"},"handle":"example.com"},"svTRID":null,"response":[]}

{"command":null,"handle":null,"code":2400,"msg":"Command failed","error":["Internal Server Error. resulted in the following error: array_key_exists() [<a href='function.array-key-exists'>function.array-key-exists<\/a>]: The second argument should be either an array or an object"],"params":[],"svTRID":null,"response":[],"children":[{"command":"Internal Server Error.","handle":null,"code":2400,"msg":"Command failed","error":["array_key_exists() [<a href='function.array-key-exists'>function.array-key-exists<\/a>]: The second argument should be either an array or an object"],"params":{"errno":2,"errstr":"array_key_exists() [<a href='function.array-key-exists'>function.array-key-exists<\/a>]: The second argument should be either an array or an object","errfile":"\/home\/ote\/httpapi\/v1\/index.php","errline":54},"svTRID":null,"response":[]}]}

错误2:

{"command":null,"handle":null,"code":2003,"msg":"Required parameter missing","error":["Parameter 'login_handle' missing.","Parameter 'login_pass' missing."],"params":{"0":{"Key":"login_handle","Value":"test"},"1":{"Key":"login_pass","Value":"test"},"handle":"example.com"},"svTRID":null,"response":[]}

{"command":null,"handle":null,"code":2400,"msg":"Command failed","error":["Internal Server Error. resulted in the following error: array_key_exists() [<a href='function.array-key-exists'>function.array-key-exists<\/a>]: The second argument should be either an array or an object"],"params":[],"svTRID":null,"response":[],"children":[{"command":"Internal Server Error.","handle":null,"code":2400,"msg":"Command failed","error":["array_key_exists() [<a href='function.array-key-exists'>function.array-key-exists<\/a>]: The second argument should be either an array or an object"],"params":{"errno":2,"errstr":"array_key_exists() [<a href='function.array-key-exists'>function.array-key-exists<\/a>]: The second argument should be either an array or an object","errfile":"\/home\/ote\/httpapi\/v1\/index.php","errline":54},"svTRID":null,"response":[]}]}

{“command”：null，“handle”：null，“code”：2400，“msg”：“command failed”，“error”：[“Internal Server error.”导致以下错误：array_key_exists（）[function.array key exists]：第二个参数应该是数组或对象“]，“params”：[]，“svTRID”：null，“response”：[]，“children”：[{“command”：“Internal Server error.”，“handle”：null，“code”：2400，“msg”：“Command failed”，“error”：[“array\u key\u exists（）[function.array key exists]：第二个参数应该是数组或对象]，“params”：{“errno”：2，“errstr”：“array\u key\u exists（）[function.array key exists]：第二个参数应该是数组或对象”，“errfile”：“\/home\/ote\/httpapi\/v1\/index.php”，“errline”“：54}，“svTRID”：null，“response”：[]}]}

代码如下：

try
            {
                ASCIIEncoding encoding = new ASCIIEncoding();


                Dictionary<string, string> data = new Dictionary<string, string>();
                data["login_handle"] = "test";
                data["login_pass"] = "test";               


                System.Net.WebRequest webReq = System.Net.WebRequest.Create(url);
                webReq.Method = "POST";
                webReq.ContentType = "application/json; charset=utf-8";
                DataContractJsonSerializer ser = new DataContractJsonSerializer(data.GetType());
                MemoryStream ms = new MemoryStream();
                ser.WriteObject(ms, data);
                String json = Encoding.UTF8.GetString(ms.ToArray());
                StreamWriter writer = new StreamWriter(webReq.GetRequestStream()); 
                writer.Write(json); 
                writer.Close();

                System.Net.WebResponse webResp = webReq.GetResponse();
                System.IO.StreamReader sr = new System.IO.StreamReader(webResp.GetResponseStream());
                string s = sr.ReadToEnd().Trim();
            }
            catch (Exception ex)
            {
                string e = ex.Message;
            }

试试看
{
ascienceoding encoding=新的ascienceoding（）；
字典数据=新字典（）；
数据[“登录句柄”]=“测试”；
数据[“登录\通过”]=“测试”；
System.Net.WebRequest webReq=System.Net.WebRequest.Create（url）；
webReq.Method=“POST”；
webReq.ContentType=“application/json；charset=utf-8”；
DataContractJsonSerializer ser=新的DataContractJsonSerializer（data.GetType（））；
MemoryStream ms=新的MemoryStream（）；
ser.WriteObject（ms，数据）；
String json=Encoding.UTF8.GetString（ms.ToArray（））；
StreamWriter writer=newstreamwriter（webReq.GetRequestStream（））；
Write.Write（json）；
writer.Close（）；
System.Net.WebResponse webResp=webReq.GetResponse（）；
System.IO.StreamReader sr=新的System.IO.StreamReader（webResp.GetResponseStream（））；
字符串s=sr.ReadToEnd（）.Trim（）；
}
捕获（例外情况除外）
{
字符串e=例如消息；
}

---

如果我使用

string data=“[login_handle:'username'，login_pass:'password']”

而不是

Dictionary

，我收到了错误号2。

没关系，我自己解决了它，而不是使用Dictionary类型，我使用了如下的匿名类型

var data=new{login\u handle=“test”，login\u pass=“test”}解决了我的问题。
您应该创建一个DataContract类（我们称之为JsonData），它有两个名为login\u handle和login\u pass的数据成员

然后，在DataContractJsonSerializer中，将typeof（JsonData）传递给构造函数

此解决方案是最好的，因为您无法使用匿名类型创建复杂类型。此外，通过创建DataContracts，您可以轻松创建复杂的JSON