构建与访问webserice 上传文件
新建一个解决方案,然后选择ASP.Net空的Web应用程序
之后添加新建项
选择web服务
之后就可以编写需要的代码 注意公开的方法上面要加上 [WebMethod]
[WebMethod] public string HelloWorld() { return "Hello World"; } //在服务器中创建文件夹 [WebMethod] public bool CreateFile(string fileName) { bool isCreate = true; try { //首先设置上传服务器文件的路径 然后发布web服务 发布的时候要自己建一个自己知道的文件夹 "C:\NMGIS_Video\" "C:\NMGIS_Video\" fileName = Path.Combine(Server.MapPath("") + @"\" + Path.GetFileName(fileName)); FileStream fs = new FileStream(fileName, FileMode.Create, FileAccess.ReadWrite, FileShare.ReadWrite); fs.Close(); } catch { isCreate = false; } return isCreate; } //在把流写入文件 [WebMethod] public bool Append(string fileName, byte[] buffer) { bool isAppend = true; try { CreateFile(fileName); // fileName = Path.Combine(@"D:\ServiceEx\" + Path.GetFileName(fileName)); fileName = Path.Combine(Server.MapPath("") + @"\" + Path.GetFileName(fileName)); FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite); //fs.Seek(0, SeekOrigin.End); fs.Write(buffer, 0, buffer.Length); fs.Close(); } catch { isAppend = false; } return isAppend; } [WebMethod(Description = "求和的方法")] public string additionBystring(string i, string j) { return i + j; } [WebMethod(Description = "求和的方法")] public double addition(double i, double j) { return i + j; } [WebMethod(Description = "求差的方法")] public double subtract(double i, double j) { return i - j; } [WebMethod(Description = "求积的方法")] public double multiplication(double i, double j) { return i * j; } [WebMethod(Description = "求商的方法")] public double division(double i, double j) { if (j != 0) return i / j; else return 0; }
上述代码含有webserice上传操作 建议小文件使用 大文件还是使用TCP方式 以上为为服务端的操作
客户端操作如要调用该webserice 则有三种方法
方法一
直接根据webSerice的网络路径添加引用
之后调用其命名空间 ServiceReference1下的Client
之后编写客户端调用服务器端webSerice中的上传 如下图所示 此为方法1 直接使用C#生成的类来调用
using (ServiceReference1.WebService1SoapClient client = new ServiceReference1.WebService1SoapClient()) { using (FileStream fs = new FileStream(@"C:\Users\Administrator\Documents\visual studio 2010\Projects\WebServicePost\WebServicePost\bin\Debug\啊啊啊.txt" , FileMode.Open, FileAccess.Read, FileShare.ReadWrite)) { byte[] bytes = new byte[(int)fs.Length]; fs.Read(bytes, 0, (int)fs.Length); client.Append("dd.txt", bytes); } //List<User> dt = client.GetList(); }
方法二 动态调用 此方法无需更新引用,如果服务端改变该值也可以进行操作.此方法为C#动态编译,把服务端的内容全部拷贝到本地然后生成类,之后进行反射调用其方法(原理)
如要了解动态编译 可以跳转 网址
https://www.cnblogs.com/HopeGi/p/3536742.html
https://www.cnblogs.com/jailu/archive/2007/07/22/827058.html
下面开始动态编译的类 如下图所示
public class WSHelper { /// < summary> /// 动态调用web服务 /// < /summary> /// < param name="url">WSDL服务地址< /param> /// < param name="methodname">方法名< /param> /// < param name="args">参数< /param> /// < returns>< /returns> public static object InvokeWebService(string url, string methodname, object[] args) { return WSHelper.InvokeWebService(url, null, methodname, args); } /// < summary> /// 动态调用web服务 /// < /summary> /// < param name="url">WSDL服务地址< /param> /// < param name="classname">类名< /param> /// < param name="methodname">方法名< /param> /// < param name="args">参数< /param> /// < returns>< /returns> public static object InvokeWebService(string url, string classname, string methodname, object[] args) { string @namespace = "EnterpriseServerBase.WebService.DynamicWebCalling"; if ((classname == null) || (classname == "")) { classname = WSHelper.GetWsClassName(url); } try { //获取WSDL WebClient wc = new WebClient(); Stream stream = wc.OpenRead(url + "?WSDL"); ServiceDescription sd = ServiceDescription.Read(stream); ServiceDescriptionImporter sdi = new ServiceDescriptionImporter(); sdi.AddServiceDescription(sd, "", ""); CodeNamespace cn = new CodeNamespace(@namespace); //生成客户端代理类代码 CodeCompileUnit ccu = new CodeCompileUnit(); ccu.Namespaces.Add(cn); sdi.Import(cn, ccu);
CSharpCodeProvider icc = new CSharpCodeProvider(); //设定编译参数
CompilerParameters cplist = new CompilerParameters(); cplist.GenerateExecutable = false; cplist.GenerateInMemory = true; cplist.ReferencedAssemblies.Add("System.dll"); cplist.ReferencedAssemblies.Add("System.XML.dll"); cplist.ReferencedAssemblies.Add("System.Web.Services.dll"); cplist.ReferencedAssemblies.Add("System.Data.dll"); //编译代理类 CompilerResults cr = icc.CompileAssemblyFromDom(cplist, ccu); if (true == cr.Errors.HasErrors) { System.Text.StringBuilder sb = new System.Text.StringBuilder(); foreach (System.CodeDom.Compiler.CompilerError ce in cr.Errors) { sb.Append(ce.ToString()); sb.Append(System.Environment.NewLine); } throw new Exception(sb.ToString()); } //生成代理实例，并调用方法 System.Reflection.Assembly assembly = cr.CompiledAssembly; Type t = assembly.GetType(@namespace + "." + classname, true, true); object obj = Activator.CreateInstance(t); System.Reflection.MethodInfo mi = t.GetMethod(methodname); return mi.Invoke(obj, args); // PropertyInfo propertyInfo = type.GetProperty(propertyname); //return propertyInfo.GetValue(obj, null); } catch (Exception ex) { throw new Exception(ex.InnerException.Message, new Exception(ex.InnerException.StackTrace)); } } private static string GetWsClassName(string wsUrl) { string[] parts = wsUrl.Split('/'); string[] pps = parts[parts.Length - 1].Split('.'); return pps[0]; } }
调用方法 string[] 属于obj[] 但是int一些基本类型暂时不支持
string url = "http://localhost:6781/WebService1.asmx"; string[] args = new string[2]; args[0] = "1"; args[1] = "2"; object result = WSHelper.InvokeWebService(url, "additionBystring", args);
方法三 使用HttpWebRequest 来访问webSerice 该方法是可以进行扩展的 根据服务端webSerice中需要的Xml你进行生成对应的XMl然后进行发送请求获取返回值.
了解XML
http://www.cnblogs.com/macroxu-1982/archive/2009/12/23/1630415.html
网页访问代码如下
class WebSvcCaller { //<webServices> // <protocols> // <add name="HttpGet"/> // <add name="HttpPost"/> // </protocols> //</webServices> private static Hashtable _xmlNamespaces = new Hashtable();//缓存xmlNamespace，避免重复调用GetNamespace /// <summary> /// 需要WebService支持Post调用 /// </summary> public static XmlDocument QueryPostWebService(String URL, String MethodName, Hashtable Pars) { HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(URL + "/" + MethodName); request.Method = "POST"; request.ContentType = "application/x-www-form-urlencoded"; SetWebRequest(request); byte[] data = EncodePars(Pars); WriteRequestData(request, data); return ReadXmlResponse(request.GetResponse()); } /// <summary> /// 需要WebService支持Get调用 /// </summary> public static XmlDocument QueryGetWebService(String URL, String MethodName, Hashtable Pars) { HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(URL + "/" + MethodName + "?" + ParsToString(Pars)); request.Method = "GET"; request.ContentType = "application/x-www-form-urlencoded"; SetWebRequest(request); return ReadXmlResponse(request.GetResponse()); } /// <summary> /// 通用WebService调用(Soap),参数Pars为String类型的参数名、参数值 /// </summary> public static XmlDocument QuerySoapWebService(String URL, String MethodName, Hashtable Pars) { if (_xmlNamespaces.ContainsKey(URL)) { return QuerySoapWebService(URL, MethodName, Pars, _xmlNamespaces[URL].ToString()); } else { return QuerySoapWebService(URL, MethodName, Pars, GetNamespace(URL)); } } private static XmlDocument QuerySoapWebService(String URL, String MethodName, Hashtable Pars, string XmlNs) { _xmlNamespaces[URL] = XmlNs;//加入缓存，提高效率 HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(URL); request.Method = "POST"; request.ContentType = "text/xml; charset=utf-8"; request.Headers.Add("SOAPAction", "\"" + XmlNs + (XmlNs.EndsWith("/") ? "" : "/") + MethodName + "\""); SetWebRequest(request); byte[] data = EncodeParsToSoap(Pars, XmlNs, MethodName); WriteRequestData(request, data); XmlDocument doc = new XmlDocument(), doc2 = new XmlDocument(); doc = ReadXmlResponse(request.GetResponse()); XmlNamespaceManager mgr = new XmlNamespaceManager(doc.NameTable); mgr.AddNamespace("soap", "http://schemas.xmlsoap.org/soap/envelope/"); String RetXml = doc.SelectSingleNode("//soap:Body/*/*", mgr).InnerXml; doc2.LoadXml("<root>" + RetXml + "</root>"); AddDelaration(doc2); return doc2; } private static string GetNamespace(String URL) { HttpWebRequest request = (HttpWebRequest)WebRequest.Create(URL + "?WSDL"); SetWebRequest(request); WebResponse response = request.GetResponse(); StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8); XmlDocument doc = new XmlDocument(); doc.LoadXml(sr.ReadToEnd()); sr.Close(); return doc.SelectSingleNode("//@targetNamespace").Value; } private static byte[] EncodeParsToSoap(Hashtable Pars, String XmlNs, String MethodName) { XmlDocument doc = new XmlDocument(); doc.LoadXml("<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\"></soap:Envelope>"); AddDelaration(doc); XmlElement soapBody = doc.CreateElement("soap", "Body", "http://schemas.xmlsoap.org/soap/envelope/"); XmlElement soapMethod = doc.CreateElement(MethodName); soapMethod.SetAttribute("xmlns", XmlNs); foreach (string k in Pars.Keys) { XmlElement soapPar = doc.CreateElement(k); soapPar.InnerXml = ObjectToSoapXml(Pars[k]); soapMethod.AppendChild(soapPar); } soapBody.AppendChild(soapMethod); doc.DocumentElement.AppendChild(soapBody); return Encoding.UTF8.GetBytes(doc.OuterXml); } private static string ObjectToSoapXml(object o) { XmlSerializer mySerializer = new XmlSerializer(o.GetType()); MemoryStream ms = new MemoryStream(); mySerializer.Serialize(ms, o); XmlDocument doc = new XmlDocument(); doc.LoadXml(Encoding.UTF8.GetString(ms.ToArray())); if (doc.DocumentElement != null) { return doc.DocumentElement.InnerXml; } else { return o.ToString(); } } private static void SetWebRequest(HttpWebRequest request) { request.Credentials = CredentialCache.DefaultCredentials; request.Timeout = 10000; } private static void WriteRequestData(HttpWebRequest request, byte[] data) { request.ContentLength = data.Length; Stream writer = request.GetRequestStream(); writer.Write(data, 0, data.Length); writer.Close(); } private static byte[] EncodePars(Hashtable Pars) { return Encoding.UTF8.GetBytes(ParsToString(Pars)); } private static String ParsToString(Hashtable Pars) { StringBuilder sb = new StringBuilder(); foreach (string k in Pars.Keys) { if (sb.Length > 0) { sb.Append("&"); } //sb.Append(HttpUtility.UrlEncode(k) + "=" + HttpUtility.UrlEncode(Pars[k].ToString())); } return sb.ToString(); } private static XmlDocument ReadXmlResponse(WebResponse response) { StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8); String retXml = sr.ReadToEnd(); sr.Close(); XmlDocument doc = new XmlDocument(); doc.LoadXml(retXml); return doc; } private static void AddDelaration(XmlDocument doc) { XmlDeclaration decl = doc.CreateXmlDeclaration("1.0", "utf-8", null); doc.InsertBefore(decl, doc.DocumentElement); } }
因为是webSerice所以其实是xml进行的底层传输
那么之后返回值也是个xml 调用方法
Hashtable ht = new Hashtable(); ht.Add("i", "1"); ht.Add("j", "2"); XmlDocument xx = WebSvcCaller.QuerySoapWebService("http://localhost:6781/WebService1.asmx", "subtract", ht); MessageBox.Show(xx.OuterXml);
