c# - Wait until string.contains() condition is met -

i'm reading file c# application , decompressing tile_data blob using gzip stream. i'm accessing blob data through method:

sqlitecommand command = new sqlitecommand(query, dbconn); sqlitedatareader reader = command.executereader(); bool ismet = false; while (reader.read()) {     using (var file = reader.getstream(0))     using (var unzip = new gzipstream(file, compressionmode.decompress))     using (var filereader = new streamreader(unzip))     {         var line = filereader.readline();         while (!filereader.endofstream)         {          }         console.writeline("end of tile_data");      } } reader.close(); console.writeline("reader closed"); console.readkey(); } catch (exception e) {     console.write(e.stacktrace);     console.readkey(); } 

i'm looking wait until filereader detects "tertiary" (string) , prints data afterwards. attempted use bool , nested while loop came infinite loop, hence question.

the code used (and failed with):

if (line.contains("tertiary"))  {     ismet = true;  }  while (!filereader.endofstream && ismet)  {     console.writeline(line);  } 

how can perform operation filereader once condition has been met?

your filereader.endofstream loop work if stream has single line. problem you're reading stream once - unless you've read whole thing, you're in endless loop.

instead, this:

string line;  while ((line = filereader.readline()) != null) {   if (line.contains("...")) break; // or whatever else want }