如何读取文件夹中的所有CSV文件

Question

我有一小段代码，可以读取CSV文件，然后将CSV文件中的账户转换为IBAN账户。

但是，不知何故，这个过程会给我带来一个错误：

using (var client = new WebService.BANBICSoapClient("IBANBICSoap"))
{
    StreamReader sr = new StreamReader(@"C:\CSV\test.csv");
    StreamWriter sw = new StreamWriter(@"C:\CSV\testOut.csv");
    while (sr.Peek() >= 0)
    {
        string line = sr.ReadLine();
        try
        {
            string[] rowsArray = line.Split(';');
            line = string.Empty;
            string account = rowsArray[0];
            string rel = rowsArray[1];
            string res = acc;
            string rest = acct;
            if (resultIBAN != string.Empty && resultBIC != string.Empty)
            {
                line = account + ";" + res +";" + rest + ";" + rel;
            }

            else
            {
                line = account + ";" + "0" + ";" + "0" + ";" + rel;
            }
        }
        catch (Exception msg)
        {
            Console.WriteLine(msg);
        }
        sw.WriteLine(line) ;
    }
    sr.Close();
    sw.Close();
}
}

- Matheno

---

找到文件夹中的所有文件并对它们应用更改是一个高中学生可以掌握的话题。如果你无法理解这个逻辑，那么你怎么能处理与银行和金钱有关的任何事情呢？如果我是你，我会非常害怕。 - walther

@Marijke 你不能使用循环的原因是什么？ - bumble_bee_tuna

请注意，此代码中有一个额外的闭合括号。 - Adi Inbar

Answer 1

对于您的StreamReader和Writer

StreamReader sr = new StreamReader(@"C:\CSV\test.csv");
StreamWriter sw = new StreamWriter(@"C:\CSV\testOut.csv");

您可以将此放置在方法内部：

private void ConvertToIBANAccount(string fileName,string outFileName)
{
    using (var client = new WebService.BANBICSoapClient("IBANBICSoap"))
        {
            StreamReader sr = new StreamReader(fileName);
            StreamWriter sw = new StreamWriter(outFileName);
            Console.WriteLine("Bezig met converteren....");
            while (sr.Peek() >= 0) 
            {
            string line = sr.ReadLine(); 
                try
                {
                    string[] rowsArray = line.Split(';');
                    line = string.Empty;
                    string account = rowsArray[0];
                    string relationID = rowsArray[1];
                    string resultIBAN = client.BBANtoIBAN(account);
                    string resultBIC = client.BBANtoBIC(account);
                    if (resultIBAN != string.Empty && resultBIC != string.Empty)
                    {
                        line = account + ";" + resultIBAN +";" + resultBIC + ";" + relationID;
                    }

                    else
                    {
                        line = account + ";" + "0" + ";" + "0" + ";" + relationID;
                    }
                }
                catch (Exception msg)
                {
                    Console.WriteLine(msg);
                }
            sw.WriteLine(line) ;

            }
            sr.Close();
            sw.Close();
        }
        Console.WriteLine("Conversie succesvol");
        Console.ReadLine();
    }
}

然后找到每个扩展名为 .csv 的文件。

string[] files = Directory.GetFiles(yourDirectoryName, "*.csv");
files.ToList().ForEach(f => ConvertToIBANAccount(f,"temp" + f));

- liquidsnake786

---

文件路径会像我回答中的最后一行所示一样传递到该方法中。 - liquidsnake786

files.ToList().ForEach(f => ConvertToIBANAccount(f,f.Replace(".csv","temp.csv")); 如果您找不到更好的替代方法，可以使用类似的.Replace来删除斜杠。 - liquidsnake786

Answer 2

你可以像这样读取所有CSV文件。

var filePaths = Directory.GetFiles(@"\\Pontos\completed\", "*_*.csv")
foreach(string s in filePaths)
{
    using (StreamReader sr = new StreamReader(s))
    {
           //perform task related file 
    }
}

- Pranay Rana

Answer 3

做类似这样的事情...

List<string> filesList = Directory.GetAllFiles("*.csv", FolderLocationToSearch).ToList();
foreach(var fileName in fileList)
{
    ConvertToIBANfromCSV(fileName);
}


public static void ConvertToIBANfromCSV(string fileName)
using (var client = new WebService.BANBICSoapClient("IBANBICSoap"))
        {
            StreamReader sr = new StreamReader(fileName);
            StreamWriter sw = new StreamWriter(@"C:\CSV\testOut.csv");
            Console.WriteLine("Bezig met converteren....");
            while (sr.Peek() >= 0) 
            {
            string line = sr.ReadLine(); 
                try
                {
                    string[] rowsArray = line.Split(';');
                    line = string.Empty;
                    string account = rowsArray[0];
                    string relationID = rowsArray[1];
                    string resultIBAN = client.BBANtoIBAN(account);
                    string resultBIC = client.BBANtoBIC(account);
                    if (resultIBAN != string.Empty && resultBIC != string.Empty)
                    {
                        line = account + ";" + resultIBAN +";" + resultBIC + ";" + relationID;
                    }

                    else
                    {
                        line = account + ";" + "0" + ";" + "0" + ";" + relationID;
                    }
                }
                catch (Exception msg)
                {
                    Console.WriteLine(msg);
                }
            sw.WriteLine(line) ;

            }
            sr.Close();
            sw.Close();
        }
        Console.WriteLine("Conversie succesvol");
        Console.ReadLine();
    }

如果我手写代码有语法错误，请您谅解。

- Nisarg Shah