写入csv文件时跳过第一行

Question

我已经编写了此代码以读取和写入CSV文件。有什么办法可以跳过将第一行作为它的头文件，并且我想将自己的头文件写入新文件。这是我迄今为止所做的

try 
    { 
     using (StreamWriter sw = new StreamWriter("C:/Projects/data/PYAEGON1AEGONRESULT.csv")) 
      using (StreamReader sr = new StreamReader("C:/Projects/data/PYAEGON1AEGON.csv")) 
      { 
       heading = "Title, First Name, Surname, Date Of Birth, NI Number, Gender, Payroll Reference, Address Line 1, Address Line 2, Address Line 3, Address Line 4, AddressLine 5, PostCode, Country, Email, Date Joined Employer, Annual Pensionable Salary, Current Period All Earnings (Monthly), Current Period Pensionable Earnings (Monthly), Emnployee (Amount Deducted), Employer (Amount Deducted), Leaving Date."; 
       sw.WriteLine(heading); 

       while((txtline = sr.ReadLine()) != null) 
       { 
        oldcolumns = Regex.Split(txtline,","); 

        newcolumns[0] = oldcolumns[0]; 
        newcolumns[1] = oldcolumns[1]; 
        newcolumns[2] = oldcolumns[2]; 
        newcolumns[3] = oldcolumns[3]; 
        newcolumns[4] = oldcolumns[4]; 
        newcolumns[5] = oldcolumns[5]; 
        newcolumns[6] = oldcolumns[6]; 
        newcolumns[7] = oldcolumns[7]; 
        newcolumns[8] = oldcolumns[9]; 
        newcolumns[9] = oldcolumns[10]; 
        newcolumns[10] = oldcolumns[11]; 
        newcolumns[11] = ""; 
        newcolumns[12] = oldcolumns[12]; 
        newcolumns[13] = "United Kingdom"; 
        newcolumns[14] = oldcolumns[14]; 
        newcolumns[15] = oldcolumns[15]; 
        newcolumns[16] = oldcolumns[16]; 
        newcolumns[17] = oldcolumns[17]; 
        newcolumns[18] = oldcolumns[18]; 
        newcolumns[19] = oldcolumns[19]; 
        newcolumns[20] = oldcolumns[20]; 
        newcolumns[21] = ""; 

        csvline = ""; 
        for (int i = 0; i < 21; i++) 
        { 
         csvline = csvline + "\"" + newcolumns[i].Replace("\"","") + "\","; 

        } 

        sw.WriteLine(csvline); 
       } 

Answer 1

在您实际开始读取输入之前，请致电sr.ReadLine()。

using (StreamWriter sw = new StreamWriter("C:/Projects/data/PYAEGON1AEGONRESULT.csv")) 
    using (StreamReader sr = new StreamReader("C:/Projects/data/PYAEGON1AEGON.csv")) 
    { 
     sr.ReadLine(); 

     // rest of your code 

Answer 2

如果你不想让你再动笔写第一行使用sr.ReadLine()一次。这使读者进入第二行。

using (StreamWriter sw = new StreamWriter("C:/Projects/data/PYAEGON1AEGONRESULT.csv")) 
using (StreamReader sr = new StreamReader("C:/Projects/data/PYAEGON1AEGON.csv")) 
{ 
    sr.ReadLine(); 
    // the next ReadLine will read the second line as desired 
    heading = "Title, First Name, Surname, Date Of Birth, NI Number, Gender, Payroll Reference, Address Line 1, Address Line 2, Address Line 3, Address Line 4, AddressLine 5, PostCode, Country, Email, Date Joined Employer, Annual Pensionable Salary, Current Period All Earnings (Monthly), Current Period Pensionable Earnings (Monthly), Emnployee (Amount Deducted), Employer (Amount Deducted), Leaving Date."; 
    sw.WriteLine(heading); 
    while((txtline = sr.ReadLine()) != null) 
    { 
     // ... 
     sw.WriteLine(csvline); 
     // ...