C#CS发送HTTP GET请求
try { WebRequest req = WebRequest.Create("http://127.0.0.1/test/loginsso.aspx?username=admin&password=admin"); req.Method = "POST"; //指定提交的Method,可以为POST和GET,一定要大写 //byte[] postData = System.Text.Encoding.GetEncoding("gbk").GetBytes("?username=admin&password=admin");//Post的数据 //req.ContentLength = postData.Length; Stream postStream = req.GetRequestStream(); //postStream.Write(postData, 0, postData.Length); postStream.Close(); WebResponse res = req.GetResponse(); System.Text.Encoding resEncoding = System.Text.Encoding.GetEncoding("utf-8");//接收的编码 StreamReader reader = new StreamReader(res.GetResponseStream(), resEncoding); string html = reader.ReadToEnd(); //接收的Html MessageBox.Show("=========" + html); reader.Close(); res.Close(); } catch (Exception ex) { MessageBox.Show("error"); }
.NET接收GET发送请求
Response.ContentEncoding = Encoding.GetEncoding("UTF-8"); string username = Request["username"]; string password = Request["password"]; if (username != "" && username == "admin" && password != "" && password == "admin") { Response.Write("success"); } else { Response.Write("error" + Request.Url.Host); // Response.Redirect("http://www.g.cn"); }
.NET接收后请求
System.Text.Encoding resEncoding = System.Text.Encoding.GetEncoding("utf-8");//接收的编码 StreamReader reader = new StreamReader(Request.InputStream, resEncoding); string msg = reader.ReadToEnd(); reader.Close();
C#CS发送图片附件
C#代码
如果 (!textBox_fileName.Text.Trim()。等于(“” )) { 字符串 的loadFile = textBox_fileName.Text.Trim(); 字符串 文件名= loadFile.Substring(loadFile.LastIndexOf(“\\”)+1,loadFile.Length - 1 - loadFile.LastIndexOf(“ \\”)); 字符串 urlStr = @ “http://127.0.0.1/test/UploadFile.aspx?name=” +文件名; UploadFileBinary(的loadFile,urlStr); } 其他 { 字符串 alStr = “您还没有选择文件” ; MessageBox.Show(alStr, “ 系统提示” ,MessageBoxButtons.OK,MessageBoxIcon.Exclamation,MessageBoxDefaultButton.Button1); }
C#代码
公共无效 UploadFileBinary(字符串 LOCALFILE, 字符串 的uploadURL) { 尝试 { RDR的FileStream = 新 的FileStream(LOCALFILE,FileMode.Open); 字节[] = INDATA 新字节[4096]; INT totbytes = 0; MemoryStream的POSTDATA = 新 的MemoryStream(); INT 读取动作= rdr.Read(INDATA,0,inData.Length); 而 (读取动作> 0) { postData.Write(INDATA,0,读取动作); 读取动作= rdr.Read(INDATA,0,inData.Length); totbytes + =读取动作; } rdr.Close(); postData.Position = 0; HttpWebRequest的REQ =(HttpWebRequest的)WebRequest.Create(的uploadURL); req.Method = “POST” ; req.ContentLength =(长)postData.Length; 使用 (流S = req.GetRequestStream()) { s.Write(postData.ToArray(),0,(INT )postData.Length); postData.Close(); } WebResponse类RESP = req.GetResponse(); System.Text.Encoding resEncoding = System.Text.Encoding.GetEncoding(“UTF-8”); //接收的编码 StreamReader的读者= 新 的StreamReader(resp.GetResponseStream(),resEncoding); 字符串 味精= reader.ReadToEnd(); reader.Close(); resp.Close(); 如果 (MSG!= 空 && msg.Equals( “ 成功” )) { MessageBox.Show( “ 图片上传成功” ,“提示” ); } } 赶上 (异常前) { //字符串exContent; // exContent = ex.ToString(); MessageBox.Show( “ 上传失败网络出现异常或者图片文件已经存在!” ,“提示” ); } }
.NET接收图片附件文件
C#代码
Response.ContentEncoding = Encoding.GetEncoding(“UTF-8” ); //在此处放置用户代码以初始化页面 字节[]海图= 零; 串ls_name; 如果 (Request.ServerVariables [ “REQUEST_METHOD” ]的ToString()。ToUpper的()== “POST” ) { 海图= Request.BinaryRead(Request.ContentLength); //获取文件名称 ls_name =的Request.QueryString [ “名” ]; //字符串picName = DateTime.Now.Ticks.ToString()+符“.gif”; //字符串picName = DateTime.Now.Ticks.ToString()+“.JPG”; STM的FileStream = 新 的FileStream(使用Server.Mappath(一个“UploadFile /” + ls_name),System.IO.FileMode.CreateNew); stm.Write(海图,0,(INT )theData.Length); stm.Close(); 的Response.Write( “ 成功” ); } 其他 { 的Response.Write( “ 错误” ); }

C# and .NET provide powerful features and an efficient development environment. 1) C# is a modern, object-oriented programming language that combines the power of C and the simplicity of Java. 2) The .NET framework is a platform for building and running applications, supporting multiple programming languages. 3) Classes and objects in C# are the core of object-oriented programming. Classes define data and behaviors, and objects are instances of classes. 4) The garbage collection mechanism of .NET automatically manages memory to simplify the work of developers. 5) C# and .NET provide powerful file operation functions, supporting synchronous and asynchronous programming. 6) Common errors can be solved through debugger, logging and exception handling. 7) Performance optimization and best practices include using StringBuild

.NETFramework is a cross-language, cross-platform development platform that provides a consistent programming model and a powerful runtime environment. 1) It consists of CLR and FCL, which manages memory and threads, and FCL provides pre-built functions. 2) Examples of usage include reading files and LINQ queries. 3) Common errors involve unhandled exceptions and memory leaks, and need to be resolved using debugging tools. 4) Performance optimization can be achieved through asynchronous programming and caching, and maintaining code readability and maintainability is the key.

Reasons for C#.NET to remain lasting attractive include its excellent performance, rich ecosystem, strong community support and cross-platform development capabilities. 1) Excellent performance and is suitable for enterprise-level application and game development; 2) The .NET framework provides a wide range of class libraries and tools to support a variety of development fields; 3) It has an active developer community and rich learning resources; 4) .NETCore realizes cross-platform development and expands application scenarios.

Design patterns in C#.NET include Singleton patterns and dependency injection. 1.Singleton mode ensures that there is only one instance of the class, which is suitable for scenarios where global access points are required, but attention should be paid to thread safety and abuse issues. 2. Dependency injection improves code flexibility and testability by injecting dependencies. It is often used for constructor injection, but it is necessary to avoid excessive use to increase complexity.

C#.NET is widely used in the modern world in the fields of game development, financial services, the Internet of Things and cloud computing. 1) In game development, use C# to program through the Unity engine. 2) In the field of financial services, C#.NET is used to develop high-performance trading systems and data analysis tools. 3) In terms of IoT and cloud computing, C#.NET provides support through Azure services to develop device control logic and data processing.

.NETFrameworkisWindows-centric,while.NETCore/5/6supportscross-platformdevelopment.1).NETFramework,since2002,isidealforWindowsapplicationsbutlimitedincross-platformcapabilities.2).NETCore,from2016,anditsevolutions(.NET5/6)offerbetterperformance,cross-

The C#.NET developer community provides rich resources and support, including: 1. Microsoft's official documents, 2. Community forums such as StackOverflow and Reddit, and 3. Open source projects on GitHub. These resources help developers improve their programming skills from basic learning to advanced applications.

The advantages of C#.NET include: 1) Language features, such as asynchronous programming simplifies development; 2) Performance and reliability, improving efficiency through JIT compilation and garbage collection mechanisms; 3) Cross-platform support, .NETCore expands application scenarios; 4) A wide range of practical applications, with outstanding performance from the Web to desktop and game development.


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