C#如何使用REST接口读写数据

基本类，拷贝下来直接调用就行：

using System;
using System.IO;
using System.Net;
using System.Text;

public enum HttpVerb
{
GET, //method 常用的就这几样，当然你也可以添加其他的 get：获取 post：修改 put：写入 delete：删除
POST,
PUT,
DELETE
}

namespace HttpUtils
{
public class RestClient
{
public string EndPoint { get; set; } //请求的url地址 eg： http://215.23.12.45:8080/order/order_id=1&isdel=0
public HttpVerb Method { get; set; } //请求的方法
public string ContentType { get; set; } //格式类型：我用的是application/json，具体使用什么，看需求吧
public string PostData { get; set; } //传送的数据，当然了我使用的是json字符串

public RestClient()
{
EndPoint = "";
Method = HttpVerb.GET;
ContentType = "text/xml";
PostData = "";
}
public RestClient(string endpoint)
{
EndPoint = endpoint;
Method = HttpVerb.GET;
ContentType = "text/xml";
PostData = "";
}
public RestClient(string endpoint, HttpVerb method)
{
EndPoint = endpoint;
Method = method;
ContentType = "text/xml";
PostData = "";
}

public RestClient(string endpoint, HttpVerb method, string postData)
{
EndPoint = endpoint;
Method = method;
ContentType = "text/xml";
PostData = postData;
}

public string MakeRequest()
{
return MakeRequest("");
}

public string MakeRequest(string parameters)
{
// Uri uri = new Uri("http://localhost:8087/water-datacenter/dataTheme/historyData/historyData/getHisDataByIdsName?ids=1&startTime=1989-12-31 00:00:00&endTime=2000-12-31 00:00:00&rtName=yyzcb&rtName=zfgxsf");

// var request = (HttpWebRequest)WebRequest.Create(uri);


var request = (HttpWebRequest)WebRequest.Create(EndPoint + parameters);

request.Method = Method.ToString();
request.ContentLength = 0;
request.ContentType = ContentType;

if (!string.IsNullOrEmpty(PostData) && Method == HttpVerb.POST)//如果传送的数据不为空，并且方法是post
{
var encoding = new UTF8Encoding();
var bytes = Encoding.GetEncoding("iso-8859-1").GetBytes(PostData);//编码方式按自己需求进行更改，我在项目中使用的是UTF-8
request.ContentLength = bytes.Length;

using (var writeStream = request.GetRequestStream())
{
writeStream.Write(bytes, 0, bytes.Length);
}
}

if (!string.IsNullOrEmpty(PostData) && Method == HttpVerb.PUT)//如果传送的数据不为空，并且方法是put
{
var encoding = new UTF8Encoding();
var bytes = Encoding.GetEncoding("iso-8859-1").GetBytes(PostData);//编码方式按自己需求进行更改，我在项目中使用的是UTF-8
request.ContentLength = bytes.Length;

using (var writeStream = request.GetRequestStream())
{
writeStream.Write(bytes, 0, bytes.Length);
}
}
using (var response = (HttpWebResponse)request.GetResponse())
{
var responseValue = string.Empty;

if (response.StatusCode != HttpStatusCode.OK)
{
var message = String.Format("Request failed. Received HTTP {0}", response.StatusCode);
throw new ApplicationException(message);
}

// grab the response
using (var responseStream = response.GetResponseStream())
{
if (responseStream != null)
using (var reader = new StreamReader(responseStream))
{
responseValue = reader.ReadToEnd();
}
}

return responseValue;
}
}

} // class

}

 

以上是类， 演示一下使用的方法：

/*
* 方法1
var client = new RestClient();
string endPoint = @"http:\myRestService.comapi";
var client = new RestClient(endPoint);
var json = client.MakeRequest();
*/

var client = new RestClient();
// client.EndPoint = @"http:\myRestService.comapi"; ;

client.EndPoint = @"http://localhost:8087/water-datacenter/dataTheme/historyData/historyData/getHisDataByIdsName"; ;
// http://localhost:8087/water-datacenter/dataTheme/historyData/historyData/getHisDataByIdsName?ids=1&startTime=1989-12-31 00:00:00&endTime=2000-12-31 00:00:00&rtName=yyzcb&rtName=zfgxsf
client.ContentType = "application/json";
client.Method = HttpVerb.POST;
client.PostData = "{postData: value}";
// var json = client.MakeRequest();
var json = client.MakeRequest("?ids=1&startTime=1989-12-31 00:0:00&endTime=2000-12-31 00:00:00&rtName=yyzcb&rtName=zfgxsf"); //带参数