如何保存通過HTML表單域提交的二進制文件？

Question

我需要將一個函數添加到以C＃編寫的現有CGI應用程序中作爲Windows控制檯應用程序。我需要添加一些用戶能夠提交數據文件進行處理的功能。數據文件可以是text/csv文件或各種二進制文件（.xls，.pdf）。我有一個使用字段選擇/提交文件的簡單測試HTML表單。這一切都很好。我可以將文本文件保存在服務器上，而不會出現問題。但是，如何保存二進制文件？我相信這很容易做到，但我一直無法弄清楚。

下面是一些示例代碼，保存文本文件的工作原理：

String formData = Console.In.ReadToEnd(); 
string boundary = string.Empty; 
string[] cPairs = cType.Split(new string[] { "; " }, StringSplitOptions.None); 
foreach (string pair in cPairs) { 
    //finds the 'boundary' text 
    if (pair.Contains("boundary")) 
     boundary = "--" + pair.Split('=')[1]; 
} 

//splits on the 'boundary' to get individual form fields/sections 
string[] sections = rawParams.Split(new string[] { boundary }, StringSplitOptions.RemoveEmptyEntries); 

// parse each section 
foreach (string section in sections) { 
    string[] parts = section.Split(new string[] { "; ", Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries); 
    if (parts[1].Equals("name=\"dFile\"")) { // 'dFile' is the form field-name for the datafile 
     //below lines get the filename 
     Regex regx = new Regex("filename=\"(.+)\"", RegexOptions.IgnoreCase); 
     Match fPath = regx.Match(parts[2]); 
     FileInfo fi = new FileInfo(fPath.Groups[1].Value); 
     regx = new Regex("([-A-Z0-9_ .]+)", RegexOptions.IgnoreCase); 
     Match fname = regx.Match(fi.Name); 

     //below lines save the file contents to a text file; starts at index 4 of the 'parts' array 
     if (fname.Groups[1].Success) { 
      TextWriter tw = new StreamWriter(fname.Groups[1].Value); 
      for (int i = 4; i < parts.Length; i++) { 
       tw.WriteLine(parts[i]); 
      } 
      tw.Close(); 
     } 
    } 
    else { 
     // parse other non-file form fields 
    } 
} 

的關鍵部分是保存到文件中。我將如何做一個二進制文件？使用正確的編碼

FileStream fs = File.Create(fname.Groups[1].Value, SOME_SIZE, FileOptions.None)) 
BinaryFormatter formatter = new BinaryFormatter(); 
... 
//inside your loop 
string s = parts[i]; 
formatter.Serialize(fs, Encoding.Unicode.GetBytes(s)); 

顯然GetBytes()： 戴夫

Answer 1

如果你只是看一些數據轉儲到一個二進制文件，使用類似。

所以，你的代碼應該是這樣的：

String formData = Console.In.ReadToEnd(); 
string boundary = string.Empty; 
string[] cPairs = cType.Split(new string[] { "; " }, StringSplitOptions.None); 
foreach (string pair in cPairs) { 
//finds the 'boundary' text 
if (pair.Contains("boundary")) 
    boundary = "--" + pair.Split('=')[1]; 
} 

//splits on the 'boundary' to get individual form fields/sections 
string[] sections = rawParams.Split(new string[] { boundary }, StringSplitOptions.RemoveEmptyEntries); 

// parse each section 
foreach (string section in sections) { 
string[] parts = section.Split(new string[] { "; ", Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries); 
if (parts[1].Equals("name=\"dFile\"")) { // 'dFile' is the form field-name for the datafile 
    //below lines get the filename 
    Regex regx = new Regex("filename=\"(.+)\"", RegexOptions.IgnoreCase); 
    Match fPath = regx.Match(parts[2]); 
    FileInfo fi = new FileInfo(fPath.Groups[1].Value); 
    regx = new Regex("([-A-Z0-9_ .]+)", RegexOptions.IgnoreCase); 
    Match fname = regx.Match(fi.Name); 

    FileStream fs = File.Create(fname.Groups[1].Value, SOME_SIZE, FileOptions.None)) 
    BinaryFormatter formatter = new BinaryFormatter(); 

    //below lines save the file contents to a text file; starts at index 4 of the 'parts' array 
    if (fname.Groups[1].Success) { 
     for (int i = 4; i < parts.Length; i++) { 
      string s = parts[i]; 
      formatter.Serialize(fs, Encoding.Unicode.GetBytes(s)); 
     } 
    } 
} 
else { 
    // parse other non-file form fields 
} 

}在C＃