Question

如何确定“测试”等扼杀是否属于文字档案?

Answer 1

您文本档案不能太大,你无法利用这一功能。

public static bool IsStringInFile(string fileName, string searchString)
{
    return File.ReadAllText(fileName).Contains(searchString);
}

Answer 2

单天办法:

var result = File.ReadAllText("path to file").Contains("string to search for");

Answer 3

If the file is reasonably small, you can just read it into a string and look for the string inside it:

if (File.ReadAllText(fileName).Contains("testing")) {
  // the string was in there
}

Answer 4

string readText = File.ReadAllText(path);
if (readText.Contains("testing"))
  //found text in file