Get count of all commas in a each line from csv file

问题

What I'm trying to accomplish is to read CSV file and get the count of commas in each row. ALL CSV files are identical. Have 9 columns and they are separated by (,) So I wrote a simple function that reads the files and using foreach loop I read each line in the file.

public static void readCSVFile(string path)
   {
      string _path = path;

      string [] text = File.ReadAllLines(_path);

      foreach (string line in text)
      {
          string currentLine = line;
          Console.WriteLine("\t" + line);
      }

   }

So typically currentLine will have an output like this:

number , 10/21/14 07:01:10, 00:28:29, number (name), number; number (name), number, number (name), N/A, number

There're total of eight , in the line. How can I programmatically get the total number of commas in each line, so I can do something like this in my foreach loop:

foreach (string line in text)
{
   string currentLine = line;

   if (totalNumberOfCommas == 8)
   {
        //do something
   }
   else
   {
        //do something else
   }

回答1:

If you just want to count the commas, you can take advantage of the fact that string implements IEnumerable<char>, so you can use Count like this:

var commas = line.Count(c => c == ',');

回答2:

One way would be to use the String.Split functionality.

foreach (string line in text)
{
   string currentLine = line;

   string[] eachColumn = currentLine.Split(',');

   if (eachColumn.Length == 9)
   {
        //do something
   }
   else
   {
        //do something else
   }
}

Note that this will not work properly if you have commas in your actual data (not as a field separator). You should probably look into a csv parser to help with this sort of thing.

回答3:

You could try something like this

foreach (string line in text)
{
   string currentLine = line;
   int totalNumberOfCommas = currentLine.Split(',').Length - 1;

   if (totalNumberOfCommas == 8)
   {
        //do something
   }
   else
   {
        //do something else
   }
}

来源：https://stackoverflow.com/questions/26513635/get-count-of-all-commas-in-a-each-line-from-csv-file

标签

console-application