c# - 如何读取文件夹中的所有 CSV

Question

我有一小段代码，我可以在其中读取 CSV 文件，然后我的代码将 CSV 文件中的帐户转换为 IBAN 帐户。

不知何故，这给了我一个错误：

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();
}
}

Answer 1

为您的流媒体阅读器和作家

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

你可以把它放在一个方法中：

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));

Answer 2

你可以像这样读取所有的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 
    }
}

Answer 3

做这样的事情...

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();
    }

如果有语法错误，请原谅我，因为我是手动编写代码的。