写入到文本文件使用列表

Question

我有100个属性的列表。如果我有成千上万的记录，我的应用程序将在写入文本文件时挂起。

那么写入文本文件有没有简单快捷的方法。

任何帮助表示赞赏。

在此先感谢

Answer 1

你应该把所有的工作负载异步，这样你不要滥用/过载主线程，并保持你的应用程序/ UI响应。你可以这样管理它：

protected void buttonSaveClick(sender object, EventArgs e) //Assuming you call your save from a button 
{ 
    string filePath = FilePath(Constants.Data, filename)); 
    StringBuilder sb = new StringBuilder(); 

    foreach(var sublist in _mylist) 
    { 
     //This will loop only through object's public properties 
     foreach(var prop in sublist.GetType().GetProperties()) 
      if(prop.CanRead) 
       sb.AppendLine(prop.GetValue(sublist, null)); 
    } 

    buttonSaveClick.Enabled = false; //Disable the UI so the user can't cause an error clicking again 

    try 
    { 
     await WriteTextAsync(filePath, _textFileHeader.DataColumnHeader(columnnames)); 
     await WriteTextAsync(filePath, sb.ToString()); 
    } 
    catch(Exception ex) 
    { 
     buttonSave.Enabled = true; //Enable UI again on error 
     //Log and/or show error to user 
    } 

    buttonSave.Enabled = true; //Enable UI again on success 
} 

private async Task WriteTextAsync(string filePath, string text) 
{ 
    byte[] encodedText = Encoding.Unicode.GetBytes(text); 

    using (FileStream sourceStream = new FileStream(filePath, 
     FileMode.Append, FileAccess.Write, FileShare.None, 
     bufferSize: 4096, useAsync: true)) 
    { 
     await sourceStream.WriteAsync(encodedText, 0, encodedText.Length); 
    }; 
}