c#發(fā)送簡(jiǎn)單的post、get請(qǐng)求
POST發(fā)送請(qǐng)求及接受響應(yīng)流程?
根據(jù)目標(biāo)地址址創(chuàng)建HttpWebRequest對(duì)象
設(shè)置響應(yīng)的請(qǐng)求參數(shù)------Method、ContentType 等
使用HttpWebRequest對(duì)象獲取請(qǐng)求流并且寫入消息體 ??
使用HttpWebRequest對(duì)象獲取響應(yīng)流并讀取流中數(shù)據(jù)(在獲取過程中就是發(fā)送請(qǐng)求并接受響應(yīng))
GET發(fā)送請(qǐng)求及接受響應(yīng)流程
把目標(biāo)地址和查詢字符串拼接在一起(如果有查詢字符串)使用拼接的字符串創(chuàng)建HttpWebRequest對(duì)象
設(shè)置響應(yīng)的請(qǐng)求參數(shù)------Method、ContentType 等
使用HttpWebRequest對(duì)象獲取響應(yīng)流并讀取流中數(shù)據(jù)(在獲取過程中就是發(fā)送請(qǐng)求并接受響應(yīng))
? ?以下為代碼：
? ? ? ??兩個(gè)請(qǐng)求方法 和讀取方法
/// <summary>
/// 發(fā)送http post請(qǐng)求
/// </summary>
/// <param name="url">地址</param>
/// <param name="parameters">查詢參數(shù)集合</param>
/// <returns></returns>
public?HttpWebResponse CreatePostHttpResponse(string?url, IDictionary<string,?string> parameters)
{
????HttpWebRequest request = WebRequest.Create(url)?as?HttpWebRequest;//創(chuàng)建請(qǐng)求對(duì)象
????request.Method =?"POST";//請(qǐng)求方式
????request.ContentType =?"application/x-www-form-urlencoded";//鏈接類型
????//構(gòu)造查詢字符串
????if?(!(parameters ==?null?|| parameters.Count == 0))
????{
????????StringBuilder buffer =?new?StringBuilder();
????????bool?first =?true;
????????foreach?(string?key?in?parameters.Keys)
????????{
?
????????????if?(!first)
????????????{
????????????????buffer.AppendFormat("&{0}={1}", key, parameters[key]);
????????????}
????????????else
????????????{
????????????????buffer.AppendFormat("{0}={1}", key, parameters[key]);
????????????????first =?false;
????????????}
????????}
????????byte[] data = Encoding.UTF8.GetBytes(buffer.ToString());
????????//寫入請(qǐng)求流
????????using?(Stream stream = request.GetRequestStream())
????????{
????????????stream.Write(data, 0, data.Length);
????????}
????}
????return?request.GetResponse()?as?HttpWebResponse;
}
/// <summary>
/// 發(fā)送http Get請(qǐng)求
/// </summary>
/// <param name="url"></param>
/// <returns></returns>
public?static?HttpWebResponse CreateGetHttpResponse(string?url)
{
????HttpWebRequest request = WebRequest.Create(url)?as?HttpWebRequest;
????request.Method =?"GET";
????request.ContentType =?"application/x-www-form-urlencoded";//鏈接類型
????return?request.GetResponse()?as?HttpWebResponse;
}
/// <summary>
/// 從HttpWebResponse對(duì)象中提取響應(yīng)的數(shù)據(jù)轉(zhuǎn)換為字符串
/// </summary>
/// <param name="webresponse"></param>
/// <returns></returns>
public?string?GetResponseString(HttpWebResponse webresponse)
{
????using?(Stream s = webresponse.GetResponseStream())
????{
????????StreamReader reader =?new?StreamReader(s, Encoding.UTF8);
????????return?reader.ReadToEnd();
????}
}
調(diào)用
//post請(qǐng)求并調(diào)用
?
Dictionary<string,?string> dic =?new?Dictionary<string,?string>();
dic.Add("id",?"4");
textBox1.Text = GetResponseString(CreatePostHttpResponse("https://www.baidu.com/", dic));
//get請(qǐng)求并調(diào)用
?
textBox3.Text = GetResponseString(CreateGetHttpResponse("https://i.cnblogs.com/EditPosts.aspx?opt=1"));
