在Winform中发HTTP请求(调用WebService服务)

王朝c#·作者佚名 2006-12-17

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手工发送HTTP请求主要是调用System.Net的HttpWebResponse方法

手工发送HTTP的GET请求:

string strURL = 'http://localhost/Play/CH1/Service1.asmx/doSearch?keyword=';

strURL +=this.textBox1.Text;

System.Net.HttpWebRequest request;

//创建一个HTTP请求

request = (System.Net.HttpWebRequest)WebRequest.Create(strURL);

//request.Method='get';

System.Net.HttpWebResponse response;

response = (System.Net.HttpWebResponse)request.GetResponse();

System.IO.Stream s;

s = response.GetResponseStream();

XmlTextReader Reader = new XmlTextReader(s);

Reader.MoveToContent();

string strValue = Reader.ReadInnerXml();

strValue = strValue.Replace('<','<');

strValue = strValue.Replace('>','>');

MessageBox.Show(strValue);

Reader.Close();

手工发送HTTP的POST请求

string strURL = 'http://localhost/Play/CH1/Service1.asmx/doSearch';

System.Net.HttpWebRequest request;

request = (System.Net.HttpWebRequest)WebRequest.Create(strURL);

//Post请求方式

request.Method='POST';

//内容类型

request.ContentType='application/x-www-form-urlencoded';

//参数经过URL编码

string paraUrlCoded = System.Web.HttpUtility.UrlEncode('keyword');

paraUrlCoded += '=' + System.Web.HttpUtility.UrlEncode(this.textBox1.Text);

byte[] payload;

//将URL编码后的字符串转化为字节

payload = System.Text.Encoding.UTF8.GetBytes(paraUrlCoded);

//设置请求的ContentLength

request.ContentLength = payload.Length;

//获得请求流

Stream writer = request.GetRequestStream();

//将请求参数写入流

writer.Write(payload,0,payload.Length);

//关闭请求流

writer.Close();