Trying to search two strings in a document in the same line-CodePudding

            WebClient wb = new WebClient();
            string License = wb.DownloadString("DocumentSite");
            if (License.Contains(LK.Text   UN.Text))

I want to search line by line and not the whole document

CodePudding user response：

You can use the StringReader to step through the string line by line.

private async Task ReadLicenseAsync(string license)
{
  using var textReader = new StringReader(license);
  string line = string.Empty;
  while ((line = await textReader.ReadLineAsync()) != null)
  {
    // TODO::Handle line
  }
}

CodePudding user response：

You can actually use Regex for this. A positive lookahead for each string (prefixed by any number of characters), and anchored to the beginning of a line, should suffice

var regex = "^"   string.Concat(new[]{LK.Text, UN.Text}.Select(s => $"(?=.*?{s})"));
if (Regex.Match(licence, regex, RegexOptions.Multiline))
{
....