从 System.IO.StringWriter 中删除一行

Question

我有一段代码将文本行添加到 System.IO.StringWriter。

当它超过一定大小时，我想从头开始清除行。

我怎么做？可以做到吗？

System.IO.StringWriter log = new System.IO.StringWriter();
log.WriteLine("some text");
log.WriteLine("more text");

// some how remove the first line ????

Answer 1

您的问题的一个可能解决方案是使用Queue 类。您可以将文本添加到此对象，当它达到一定大小时，您开始修剪初始数据

例如

void Main()
{
    int maxQueueSize = 50;
    var lines = File.ReadAllLines(filePath);
    Queue<string> q = new Queue<string>(lines);

    // Here you should check for files bigger than your limit    
    ....

    // Trying to add too many elements
    for (int x = 0; x < maxQueueSize * 2; x++) 
    {
        // Remove the first if too many elements
        if(q.Count == maxQueueSize)
            q.Dequeue();

        // as an example, add the x converted to string                
        q.Enqueue(x.ToString());

    }
    // Back to disk
    File.WriteAllLines(filePath, q.ToList());
}