讀取文本文件的最快方法是什么？我想逐行讀取文本文件。我想知道我是否在.NET C#范圍內(nèi)盡可能高效地完成這個(gè)任務(wù)。這就是我目前正在嘗試的：var filestream = new System.IO.FileStream(textFilePath,
System.IO.FileMode.Open,
System.IO.FileAccess.Read,
System.IO.FileShare.ReadWrite);var file = new System.IO.StreamReader(filestream, System.Text.Encoding.UTF8, true, 128);
while ((lineOfText = file.ReadLine()) != null){
//Do something with the lineOfText}
3 回答
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使用StreamReader.Readline
const Int32 BufferSize = 128;using (var fileStream = File.OpenRead(fileName))
using (var streamReader = new StreamReader(fileStream, Encoding.UTF8, true, BufferSize)) {
String line;
while ((line = streamReader.ReadLine()) != null)
// Process line
}FileStreamFileOptions.SequentialScan
使用File.Readline
StreamReader
var lines = File.ReadLines(fileName);foreach (var line in lines) // Process line
使用File.ReadAllline
String[]IEnumerable<String>
var lines = File.ReadAllLines(fileName);for (var i = 0; i < lines.Length; i += 1) {
var line = lines[i];
// Process line}使用String.plit
String.Split
using (var streamReader = File.OpenText(fileName)) {
var lines = streamReader.ReadToEnd().Split("\r\n".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
foreach (var line in lines)
// Process line}File.ReadLinesFileShare.ReadWrite
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