如何逐行读取csv文件及其字段。

我是C＃初学者刚刚开始编码。

我想逐行读取csv文件及其字段。然后通过从文本框添加数据将其写入文本文件（1new.txt）。



我尝试过：

I am beginner in C# just started coding.
I want to read csv file line by line and their fields. Then write it to text file (1new.txt) by adding data from text box to it.

What I have tried:

using (TextFieldParser parser = new TextFieldParser(@"c:\\barcode\\brcd4.csv"))
                {

                    parser.TextFieldType = FieldType.Delimited;
                    parser.SetDelimiters(",");
                    // parser.SetDelimiters("|");



                    //string[] fields; // Used to hold the fields after each read




                    {
                        string[] fields = parser.ReadFields(); // Parse the line just read into the array

                        // foreach (var field in fields)         // Process the fields

                        List<string[]> listOfValues = new List<string[]>();
                        using (var fs = File.OpenRead(@"c:\\barcode\\brcd4.csv"))
                        using (var read = new StreamReader(fs))
                        {
                            while (!read.EndOfStream)
                            {

                                int i = 0;
                                var line = read.ReadLine();
                                while (i <= 10)
                                {
                                    var values = line.Split(',');

                                    // var line = read.ReadLine();
                                     //listOfValues.Add(line.Split(','));



                                    //string[] fields = parser.ReadFields();


                                    //using (var fields = new StreamReader(@"c:\\barcode\\brcd4.csv"))


                                    //var fields = sw1.GetField<int>(0);

                                    sw1.WriteLineAsync(textBox1.Text + "" + fields[0]);
                                    sw1.WriteLineAsync(textBox2.Text + "" + fields[1]);
                                    sw1.WriteLineAsync(textBox3.Text + "" + fields[2]);
                                    sw1.WriteLineAsync(textBox4.Text + "" + fields[3]);
                                    sw1.WriteLineAsync(textBox5.Text + "" + fields[4]);
                                    sw1.WriteLineAsync(textBox6.Text + "" + fields[5]);
                                    sw1.WriteLineAsync(textBox1.Text + "" + fields[6]);
                                    //sw1.WriteLineAsync(textBox2.Text + "" + fields[7]);
                                    //sw1.WriteLineAsync(textBox3.Text + "" + fields[8]);
                                    //sw1.WriteLineAsync(textBox4.Text + "" + fields[9]);
                                    //sw1.WriteLineAsync(textBox5.Text + "" + fields[10]);
                                    //sw1.WriteLineAsync(textBox6.Text + "" + fields[11]);


                                    //Console.Write(values[i]);
                                    //Console.Read();
                                    i++;
                                    // {
                                       Console.Write(values + "  |  ");
                                    //  }
                                    // Console.WriteLine();
                                }

                            }
                        }
File.WriteAllText(@"c:\barcode\1new.txt", sw1.ToString());