.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();