使用C#调用webApi

作者：菜鸟追梦旅行 | 2024-05-07 17:40:32

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c#调用webapi

1、restClient类

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Web;

namespace Task10WebApi
{
    public class RestClient
    {
        /// <summary>
        /// 请求服务器地址
        /// </summary>
        private string BaseUri;
        public RestClient(string baseUri)
        {
            this.BaseUri = baseUri;
        }

        #region Get请求
        public string Get(string uri)
        {
            //先根据用户请求的uri构造请求地址
            string serviceUrl = string.Format("{0}/{1}", this.BaseUri, uri);
            //创建Web访问对  象
            HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(serviceUrl);
            //通过Web访问对象获取响应内容
            HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse();
            //通过响应内容流创建StreamReader对象，因为StreamReader更高级更快
            StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8);
            //string returnXml = HttpUtility.UrlDecode(reader.ReadToEnd());//解决编码问题
            string returnXml = reader.ReadToEnd();//利用StreamReader就可以从响应内容从头读到尾
            reader.Close();
            myResponse.Close();
            return returnXml;
        }
        #endregion

        #region Post请求
        public string Post(string data, string uri)
        {
            //先根据用户请求的uri构造请求地址
            string serviceUrl = string.Format("{0}/{1}", this.BaseUri, uri);
            //创建Web访问对象
            HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(serviceUrl);
            //数据转成“UTF-8”的字节流
            byte[] buf = System.Text.Encoding.GetEncoding("UTF-8").GetBytes(data);

            myRequest.Method = "POST";
            myRequest.ContentLength = buf.Length;
            myRequest.ContentType = "application/json";
            myRequest.MaximumAutomaticRedirections = 1;
            myRequest.AllowAutoRedirect = true;
            //发送请求
            Stream stream = myRequest.GetRequestStream();
            stream.Write(buf, 0, buf.Length);
            stream.Close();

            //获取接口返回值
            //通过Web访问对象获取响应内容
            HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse();
            //通过响应内容流创建StreamReader对象，因为StreamReader更高级更快
            StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8);
            //string returnXml = HttpUtility.UrlDecode(reader.ReadToEnd());//解决编码问题
            string returnXml = reader.ReadToEnd();//利用StreamReader就可以从响应内容从头读到尾
            reader.Close();
            myResponse.Close();
            return returnXml;

        }
        #endregion

        #region Put请求
        public string Put(string data, string uri)
        {
            //先根据用户请求的uri构造请求地址
            string serviceUrl = string.Format("{0}/{1}", this.BaseUri, uri);
            //创建Web访问对象
            HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(serviceUrl);
            //把用户传过来的数据转成“UTF-8”的字节流
            byte[] buf = System.Text.Encoding.GetEncoding("UTF-8").GetBytes(data);

            myRequest.Method = "PUT";
            myRequest.ContentLength = buf.Length;
            myRequest.ContentType = "application/json";
            myRequest.MaximumAutomaticRedirections = 1;
            myRequest.AllowAutoRedirect = true;
            //发送请求
            Stream stream = myRequest.GetRequestStream();
            stream.Write(buf, 0, buf.Length);
            stream.Close();

            //获取接口返回值
            //通过Web访问对象获取响应内容
            HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse();
            //通过响应内容流创建StreamReader对象，因为StreamReader更高级更快
            StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8);
            //string returnXml = HttpUtility.UrlDecode(reader.ReadToEnd());//解决编码问题
            string returnXml = reader.ReadToEnd();//利用StreamReader就可以从响应内容从头读到尾
            reader.Close();
            myResponse.Close();
            return returnXml;

        }
        #endregion


        #region Delete请求
        public string Delete(string data, string uri)
        {
            //先根据用户请求的uri构造请求地址
            string serviceUrl = string.Format("{0}/{1}", this.BaseUri, uri);
            //创建Web访问对象
            HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(serviceUrl);
            //把用户传过来的数据转成“UTF-8”的字节流
            byte[] buf = System.Text.Encoding.GetEncoding("UTF-8").GetBytes(data);

            myRequest.Method = "DELETE";
            myRequest.ContentLength = buf.Length;
            myRequest.ContentType = "application/json";
            myRequest.MaximumAutomaticRedirections = 1;
            myRequest.AllowAutoRedirect = true;
            //发送请求
            Stream stream = myRequest.GetRequestStream();
            stream.Write(buf, 0, buf.Length);
            stream.Close();

            //获取接口返回值
            //通过Web访问对象获取响应内容
            HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse();
            //通过响应内容流创建StreamReader对象，因为StreamReader更高级更快
            StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8);
            //string returnXml = HttpUtility.UrlDecode(reader.ReadToEnd());//解决编码问题
            string returnXml = reader.ReadToEnd();//利用StreamReader就可以从响应内容从头读到尾
            reader.Close();
            myResponse.Close();
            return returnXml;

        }
        #endregion
    }
}
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2、调用示例

1）、webconfig配置

<appSettings>
    <!--WebApi访问地址-->
    <add  key="ProjectFlowMangement10WebApi" value="http://localhost:1723" />
  </appSettings>
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3）、实例化RestClient类，传入webApi接口地址参数，如下

public RestClient _ProjectFlowMangement10WebApi = new RestClient(ConfigurationManager.AppSettings["ProjectFlowMangement10WebApi"]);
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4）、调用方法示例

public bool SaveProjectApprovalBusinessInfo(SaveWorkFlowDO _SaveWorkFlowDO)
        {
            SystemRunLogDTO systemRunLogDTO = new SystemRunLogDTO(ControllerName);
            systemRunLogDTO.voidName = "SaveProjectApprovalInfo";
            systemRunLogDTO.logDesc = "保存项目立项业务数据";
            BillBaseDTO _bd = new BillBaseDTO();
            JObject _jobj = null;
            bool _result = false;
            try
            {
                string jsonStr = JsonConvert.SerializeObject(_SaveWorkFlowDO);
                _jobj = JsonConvert.DeserializeObject<JObject>(_ProjectFlowMangement10WebApi.Post(jsonStr, "api/CusSaveProjectFlow/SaveProjectApprovalInfo"));
                if (_jobj != null && _jobj["resultStatus"].ToString() == "0")
                {
                    _result = true;
                    _wl.WriteSuccessLog(systemRunLogDTO, string.Format("执行成功,flowId:{0}", _bd.BillWorkflowId));
                }
                else
                {
                    _wl.WriteErrorLog(systemRunLogDTO, string.Format("执行失败,flowId:{0}", _bd.BillWorkflowId), 1);
                }

            }
            catch (Exception ex)
            {
                _wl.WriteErrorLog(systemRunLogDTO, string.Format("执行失败,msg:{0}", ex.Message), 2);
            }
            return _result;
        }
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json数据格式转换类下载地址，点击跳转下载

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