看看这个

使用CsvFramework;

使用System.Collections.Generic;

命名空间 CvsParser {

public class Customer
{
    public int Id { get; set; }
    public string Name { get; set; }
    public List<Order> Orders { get; set; }        
}

public class Order
{
    public int Id { get; set; }

    public int CustomerId { get; set; }
    public int Quantity { get; set; }

    public int Amount { get; set; }

    public List<OrderItem> OrderItems { get; set; }

}

public class Address
{
    public int Id { get; set; }
    public int CustomerId { get; set; }

    public string Name { get; set; }
}

public class OrderItem
{
    public int Id { get; set; }
    public int OrderId { get; set; }

    public string ProductName { get; set; }
}

class Program
{
    static void Main(string[] args)
    {

        var customerLines = System.IO.File.ReadAllLines(@"Customers.csv");
        var orderLines = System.IO.File.ReadAllLines(@"Orders.csv");
        var orderItemLines = System.IO.File.ReadAllLines(@"OrderItemLines.csv");

        CsvFactory.Register<Customer>(builder =>
        {
            builder.Add(a => a.Id).Type(typeof(int)).Index(0).IsKey(true);
            builder.Add(a => a.Name).Type(typeof(string)).Index(1);
            builder.AddNavigation(n => n.Orders).RelationKey<Order, int>(k => k.CustomerId);

        }, false, ',', customerLines);

        CsvFactory.Register<Order>(builder =>
        {
            builder.Add(a => a.Id).Type(typeof(int)).Index(0).IsKey(true);
            builder.Add(a => a.CustomerId).Type(typeof(int)).Index(1);
            builder.Add(a => a.Quantity).Type(typeof(int)).Index(2);
            builder.Add(a => a.Amount).Type(typeof(int)).Index(3);
            builder.AddNavigation(n => n.OrderItems).RelationKey<OrderItem, int>(k => k.OrderId);

        }, true, ',', orderLines);


        CsvFactory.Register<OrderItem>(builder =>
        {
            builder.Add(a => a.Id).Type(typeof(int)).Index(0).IsKey(true);
            builder.Add(a => a.OrderId).Type(typeof(int)).Index(1);
            builder.Add(a => a.ProductName).Type(typeof(string)).Index(2);


        }, false, ',', orderItemLines);



        var customers = CsvFactory.Parse<Customer>();


    }
}

}

你可以这样做:

using System.IO;

static void Main(string[] args)
{
    using(var reader = new StreamReader(@"C:\test.csv"))
    {
        List<string> listA = new List<string>();
        List<string> listB = new List<string>();
        while (!reader.EndOfStream)
        {
            var line = reader.ReadLine();
            var values = line.Split(';');

            listA.Add(values[0]);
            listB.Add(values[1]);
        }
    }
}

我通常从codeproject中使用这个解析器，因为它为我处理了一堆字符转义和类似的东西。

仍然是错误的。你需要对引号中的""进行补偿。 这是我的解决方案微软风格csv。

               /// <summary>
    /// Microsoft style csv file.  " is the quote character, "" is an escaped quote.
    /// </summary>
    /// <param name="fileName"></param>
    /// <param name="sepChar"></param>
    /// <param name="quoteChar"></param>
    /// <param name="escChar"></param>
    /// <returns></returns>
    public static List<string[]> ReadCSVFileMSStyle(string fileName, char sepChar = ',', char quoteChar = '"')
    {
        List<string[]> ret = new List<string[]>();

        string[] csvRows = System.IO.File.ReadAllLines(fileName);

        foreach (string csvRow in csvRows)
        {
            bool inQuotes = false;
            List<string> fields = new List<string>();
            string field = "";
            for (int i = 0; i < csvRow.Length; i++)
            {
                if (inQuotes)
                {
                    // Is it a "" inside quoted area? (escaped litteral quote)
                    if(i < csvRow.Length - 1 && csvRow[i] == quoteChar && csvRow[i+1] == quoteChar)
                    {
                        i++;
                        field += quoteChar;
                    }
                    else if(csvRow[i] == quoteChar)
                    {
                        inQuotes = false;
                    }
                    else
                    {
                        field += csvRow[i];
                    }
                }
                else // Not in quoted region
                {
                     if (csvRow[i] == quoteChar)
                    {
                        inQuotes = true;
                    }
                    if (csvRow[i] == sepChar)
                    {
                        fields.Add(field);
                        field = "";
                    }
                    else 
                    {
                        field += csvRow[i];
                    }
                }
            }
            if (!string.IsNullOrEmpty(field))
            {
                fields.Add(field);
                field = "";
            }
            ret.Add(fields.ToArray());
        }

        return ret;
    }
}

在下面的代码中，需要在csv中进行json转换

您可以不做任何更改就使用下面的代码。

这段代码将使用两个行标题或一个行标题。

下面的代码读取上传的IForm文件并转换为内存流。

如果你想使用文件路径而不是上传文件，你可以替换

new StreamReader(ms, System.Text.Encoding)UTF8, true))与新的StreamReader("../../examplefilepath");

using (var ms = new MemoryStream())
{
    administrativesViewModel.csvFile.CopyTo(ms);
    ms.Position = 0;
    using (StreamReader csvReader = new StreamReader(ms, System.Text.Encoding.UTF8, true))
    {
        List<string> lines = new List<string>();
        while (!csvReader.EndOfStream)
        {
            var line = csvReader.ReadLine();
            var values = line.Split(';');
            if (values[0] != "" && values[0] != null)
            {
                lines.Add(values[0]);
            }
        }
        var csv = new List<string[]>();
        foreach (string item in lines)
        {
            csv.Add(item.Split(','));
        }
        var properties = lines[0].Split(',');
        int csvI = 1;
        var listObjResult = new List<Dictionary<string, string>>();
        if (lines.Count() > 1)
        {
            var ln = lines[0].Substring(0, lines[0].Count() - 1);
            var ln1 = lines[1].Substring(0, lines[1].Count() - 1);
            var lnSplit = ln.Split(',');
            var ln1Split = ln1.Split(',');
            if (lnSplit.Count() != ln1Split.Count())
            {
                properties = lines[1].Split(',');
                csvI = 2;
            }
        }
        for (int i = csvI; i < csv.Count(); i++)
        {
            var objResult = new Dictionary<string, string>();
            if (csvI > 0)
            {
                var splitProp = lines[0].Split(":");
                if (splitProp.Count() > 1)
                {
                    if (splitProp[0] != "" && splitProp[0] != null && splitProp[1] != "" && splitProp[1] != null)
                    {
                        objResult.Add(splitProp[0], splitProp[1]);
                    }
                }
            }
            for (int j = 0; j < properties.Length; j++)
                if (!properties[j].Contains(":"))
                {
                    objResult.Add(properties[j], csv[i][j]);
                }
            listObjResult.Add(objResult);
        }
        var result = JsonConvert.SerializeObject(listObjResult);
        var result2 = JArray.Parse(result);
        Console.WriteLine(result2);
    }
}

这里有一个特殊的情况，其中一个数据字段有分号(“;”)作为它的数据的一部分，在这种情况下，上面的大多数答案将失败。

这种情况下的解决方案是

string[] csvRows = System.IO.File.ReadAllLines(FullyQaulifiedFileName);
string[] fields = null;
List<string> lstFields;
string field;
bool quoteStarted = false;
foreach (string csvRow in csvRows)
{
    lstFields = new List<string>();
    field = "";
    for (int i = 0; i < csvRow.Length; i++)
    {
        string tmp = csvRow.ElementAt(i).ToString();
        if(String.Compare(tmp,"\"")==0)
        {
            quoteStarted = !quoteStarted;
        }
        if (String.Compare(tmp, ";") == 0 && !quoteStarted)
        {
            lstFields.Add(field);
            field = "";
        }
        else if (String.Compare(tmp, "\"") != 0)
        {
            field += tmp;
        }
    }
    if(!string.IsNullOrEmpty(field))
    {
        lstFields.Add(field);
        field = "";
    }
// This will hold values for each column for current row under processing
    fields = lstFields.ToArray(); 
}