我编写了一个Winform应用程序,它读取文本文件的每一行,使用行上的RegEx进行搜索和替换,然后将其写回新文件.我选择了"逐行"方法,因为有些文件太大而无法加载到内存中.
我正在使用BackgroundWorker对象,因此可以使用作业的进度更新UI.下面是代码(为简洁起见省略了部分),它处理读取然后输出文件中的行.
public void bgWorker_DoWork(object sender, DoWorkEventArgs e)
{
// Details of obtaining file paths omitted for brevity
int totalLineCount = File.ReadLines(inputFilePath).Count();
using (StreamReader sr = new StreamReader(inputFilePath))
{
int currentLine = 0;
String line;
while ((line = sr.ReadLine()) != null)
{
currentLine++;
// Match and replace contents of the line
// omitted for brevity
if (currentLine % 100 == 0)
{
int percentComplete = (currentLine * 100 / totalLineCount);
bgWorker.ReportProgress(percentComplete);
}
using (FileStream fs = new FileStream(outputFilePath, FileMode.Append, FileAccess.Write)) …
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