序列化正在覆盖文件

Question

我创建了一个class来创建从用户读写的进程。有人可以帮助我为什么它正在写入文本文件但它正在覆盖自己吗？

[Serializable]
class FileReadWrite<TFile>
{
    static Stream stream;
    static IFormatter formatter = new BinaryFormatter();

    //Writing to text file
    public static void SerializeData(List<TFile> objectToSerialize, string filePath)
    {            
        stream = new FileStream(filePath, FileMode.Create);        
        formatter.Serialize(stream, objectToSerialize);
        Console.WriteLine("Account Created SuccessFully!");
        stream.Close();
    }
}

Answer 1

需要FileMode.Append。根据 doc:

Opens the file if it exists and seeks to the end of the file, or creates a new file. This requires Append permission. FileMode.Append can be used only in conjunction with FileAccess.Write. Trying to seek to a position before the end of the file throws an IOException exception, and any attempt to read fails and throws a NotSupportedException exception.

所以解决方案是：

stream = new FileStream(filePath, FileMode.Append);

或者您可以像这样进行显式检查：

if(!File.Exists(fileName))
{ // create a new file 
}
else //Append to a file

Answer 2

问题不是很清楚可能这是你想做的：使用 (FileStream file = new FileStream(Filepath, FileMode.Append, FileAccess.Write))

序列化正在覆盖文件

Serialization is overwriting to the file

c#

serialization

overwrite

file-writing