.NET中winform传递参数至Url并获得返回值或文件

在winform里面调用URL并传递参数主要使用HttpWebRequest对象，分为两种形式post和get，个人感觉就是模拟了浏览器，

1.post方法：

/// <summary>

/// 使用post方法，调用短信接口

/// < /summary>

/// <param name="PhoneNumber"></param>

/// <param name="SmsContent"></param>

/// <param name="PhoneNumberType"></param>

/// <param name="SmsUser"></param>

private void CallMsgCenterToSendMsgPost(string PhoneNumber, string SmsContent, string PhoneNumberType, string SmsUser)

{

string formUrl = ConfigurationSettings.AppSettings["formUrl"].ToString().Trim();//url地址

string formData = "PhoneNumber=" + PhoneNumber + "&SmsContent=" +SmsContent + "&PhoneNumberType=" + PhoneNumberType + "&SmsUser=" + SmsUser + "";

CookieContainer cookieContainer = new CookieContainer();

// 将提交的字符串数据转换成字节数组

byte[] postData = Encoding.UTF8.GetBytes(formData);

// 设置提交的相关参数

HttpWebRequest request = WebRequest.Create(formUrl) as HttpWebRequest;

Encoding myEncoding = Encoding.GetEncoding("gb2312");

request.Method = "POST";

request.KeepAlive = false;

request.AllowAutoRedirect = true;

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

request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)";

request.CookieContainer = cookieContainer;

request.ContentLength = postData.Length;

// 提交请求数据

System.IO.Stream outputStream = request.GetRequestStream();

outputStream.Write(postData, 0, postData.Length);

outputStream.Close();

HttpWebResponse response;

Stream responseStream;

StreamReader reader;

string srcString;

response = request.GetResponse() as HttpWebResponse;

responseStream = response.GetResponseStream();

reader = new System.IO.StreamReader(responseStream, Encoding.UTF8);

srcString = reader.ReadToEnd();

reader.Close();

}

2，get方法

/// <summary>

/// 使用get方法

/// < /summary>

/// <param name="PhoneNumber"></param>

/// <param name="SmsContent"></param>

/// <param name="PhoneNumberType"></param>

/// <param name="SmsUser"></param>

private void CallMsgCenterToSendMsgGet(string PhoneNumber, string SmsContent, string PhoneNumberType, string SmsUser)

{

string formUrl = ConfigurationSettings.AppSettings["formUrl"].ToString().Trim();

string formData = "PhoneNumber=" + HttpUtility.UrlEncode(PhoneNumber) + "&SmsContent=" + HttpUtility.UrlEncode(SmsContent) + "&PhoneNumberType=" + HttpUtility.UrlEncode(PhoneNumberType) + "&SmsUser=" + HttpUtility.UrlEncode(SmsUser) + "";

CookieContainer cookieContainer = new CookieContainer();

formUrl = formUrl + "?" + formData;

// 设置提交的相关参数

HttpWebRequest request = WebRequest.Create(formUrl) as HttpWebRequest;

request.Method = "GET";

request.KeepAlive = false;

request.AllowAutoRedirect = true;

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

request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)";

request.CookieContainer = cookieContainer;

HttpWebResponse SendSMSResponse = (HttpWebResponse)request.GetResponse();

StreamReader SendSMSResponseStream = new StreamReader(SendSMSResponse.GetResponseStream());

string strRespone = SendSMSResponseStream.ReadToEnd();

SendSMSResponse.Close();

SendSMSResponseStream.Close();

}

3，调用起来都比较简单的，主要是在传递参数的过程中注意中文的处理，否则会变为乱码，获取返回值当然就使用HttpWebResponse对象了

例子

//string strImageURL = "http://192.168.0.72:8888/SealCenter/SEAL_FILE_DOWN.do?";

string strImageURL = url;// "http://192.168.0.72:8888/SealCenter/SEAL_FILE_DOWN.do?";

strImageURL = strImageURL + "SERIAL=" + this.MD5String(cerKey) + "&TYPE=" + this.cmbSPECIALTYPE.SelectedValue + "&CITYCODE=" + this.cmbZone.SelectedValue;

System.Net.HttpWebRequest webRequest = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(strImageURL);

webRequest.Method = "GET";

webRequest.KeepAlive = false;

webRequest.AllowAutoRedirect = true;

webRequest.ContentType = "application/x-www-form-urlencoded";

webRequest.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)";

//webRequest.CookieContainer = cookieContainer;

System.Net.HttpWebResponse webResponse = (System.Net.HttpWebResponse)webRequest.GetResponse();

System.IO.Stream s = webResponse.GetResponseStream();

List<byte> list = new List<byte>();

while (true)

{

int data = s.ReadByte();

if (data == -1)

break;

else

{

byte b = (byte)data;

list.Add(b);

}

}

byte[] bb = list.ToArray();

System.IO.File.WriteAllBytes(Path, bb); //Path保存的文件 得事先知道文件的后缀

s.Close();

方法2示例代码：

--------------

string strImageURL = "http://192.168.0.1:88/VDirA/images/1.jpg";

System.Net.WebClient webClient = new System.Net.WebClient();

webClient.DownloadFile(strImageURL, @"D:/1.jpg");

方法3示例代码：

--------------

string strImageURL = "http://192.168.0.1:88/VDirA/images/1.jpg";

System.Net.HttpWebRequest webRequest = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(strImageURL);

webRequest.Method = "GET";

System.Net.HttpWebResponse webResponse = (System.Net.HttpWebResponse)webRequest.GetResponse();

System.IO.Stream s = webResponse.GetResponseStream();

List<byte> list = new List<byte>();

while (true)

{

int data = s.ReadByte();

if (data == -1)

break;

else

{

byte b = (byte)data;

list.Add(b);

}

}

byte[] bb = list.ToArray();

System.IO.File.WriteAllBytes("C://1.jpg", bb);

s.Close();