我是 C# 客户端和服务器应用程序的新手,正在开发文件上传客户端和服务器应用程序。
我可以从客户端应用程序成功地将文件名和文件数据上传到服务器。但是当我尝试实现一个新的文本框,允许文件上传客户端输入他/她的姓名,并在他/她单击发送按钮时将信息与文件名和文件数据一起发送。
客户端应用程序。
/* file name and file length */
byte[] fName = Encoding.UTF8.GetBytes(fileName);
byte[] fNameLen = BitConverter.GetBytes(fileName.Length); // length of file name
clientData = new byte[4 + fileName.Length];
System.Diagnostics.Debug.WriteLine("fName " + fName.Length);
System.Diagnostics.Debug.WriteLine("fNamelen " + fNameLen.Length);
fNameLen.CopyTo(clientData, 0);
fName.CopyTo(clientData, 4);
/* author name and author name length */
byte[] aName = Encoding.UTF8.GetBytes(textBox2.Text);
byte[] aNameLen = BitConverter.GetBytes(textBox2.Text.Length);
System.Diagnostics.Debug.WriteLine("aName " + aName.Length);
System.Diagnostics.Debug.WriteLine("aNamelen " + aNameLen.Length);
authorData = new byte[9 + textBox2.Text.Length];
aNameLen.CopyTo(authorData, 5);
aName.CopyTo(authorData, 9);
服务器应用程序
/* retriving of file name */
System.Diagnostics.Debug.WriteLine("Error 1");
fNameLen = BitConverter.ToInt32(state.buffer, 0);
System.Diagnostics.Debug.WriteLine("Error 2 fNameLen " + fNameLen);
string Filename = Encoding.UTF8.GetString(state.buffer, 4, fNameLen);
System.Diagnostics.Debug.WriteLine("Error 3");
System.Diagnostics.Debug.WriteLine("filename length " + fNameLen);
receivedPath = @"C:\testfiles\" + Filename;
System.Diagnostics.Debug.WriteLine("bytesREad1 " + bytesRead);
System.Diagnostics.Debug.WriteLine(receivedPath);
/* retriving of author name */
aNameLen = BitConverter.ToInt32(state.buffer, 5);
System.Diagnostics.Debug.WriteLine("Error 4");
System.Diagnostics.Debug.WriteLine("error 5");
System.Diagnostics.Debug.WriteLine("author name length " + aNameLen);
string authorName = ASCIIEncoding.ASCII.GetString(state.buffer, 9, aNameLen);
System.Diagnostics.Debug.WriteLine("Error 6");
System.Diagnostics.Debug.WriteLine("author name " + authorName);
System.Diagnostics.Debug.WriteLine("author name length " + aNameLen);
输出窗口和错误以粗体显示:
- Error 1
- 错误 2 fNameLen 12
- Error 3
- 文件名长度12
- 字节读取1 82
- C:\testfiles\Test1122.txt
- Error 4
- error 5
- 作者姓名长度829715301
- “System.ArgumentOutOfRangeException”类型的第一次机会异常
发生在 mscorlib.dll 中
先感谢您。
如果您使用 BinaryReader / BinaryWriter ,事情会更容易。
例子:
Client
fileContents
是一个字节数组。
var stream = new MemoryStream();
var writer = new BinaryWriter(stream);
writer.Write(fileName);
writer.Write(authorName);
writer.Write(fileContents.Length);
writer.Write(fileContents);
var data = stream.ToArray(); // send this data array to server
writer.Dispose();
stream.Dispose();
Server
var stream = new MemoryStream(state.buffer);
var reader = new BinaryReader(stream);
var fileName = reader.ReadString();
var author = reader.ReadString();
var fileContents = reader.ReadBytes(reader.ReadInt32());
reader.Dispose();
stream.Dispose();
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