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);
    }
}

我花了几个小时寻找合适的库，但最后我写了自己的代码:) 你可以用任何你想要的工具读取文件(或数据库)，然后应用下面的例程到每一行:

private static string[] SmartSplit(string line, char separator = ',')
{
    var inQuotes = false;
    var token = "";
    var lines = new List<string>();
    for (var i = 0; i < line.Length; i++) {
        var ch = line[i];
        if (inQuotes) // process string in quotes, 
        {
            if (ch == '"') {
                if (i<line.Length-1 && line[i + 1] == '"') {
                    i++;
                    token += '"';
                }
                else inQuotes = false;
            } else token += ch;
        } else {
            if (ch == '"') inQuotes = true;
            else if (ch == separator) {
                lines.Add(token);
                token = "";
                } else token += ch;
            }
    }
    lines.Add(token);
    return lines.ToArray();
}

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]);
        }
    }
}

我最喜欢的CSV解析器是内置于. net库中的。这是微软内部隐藏的宝藏。VisualBasic名称空间。 下面是一个示例代码:

using Microsoft.VisualBasic.FileIO;

var path = @"C:\Person.csv"; // Habeeb, "Dubai Media City, Dubai"
using (TextFieldParser csvParser = new TextFieldParser(path))
{
 csvParser.CommentTokens = new string[] { "#" };
 csvParser.SetDelimiters(new string[] { "," });
 csvParser.HasFieldsEnclosedInQuotes = true;

 // Skip the row with the column names
 csvParser.ReadLine();

 while (!csvParser.EndOfData)
 {
  // Read current line fields, pointer moves to the next line.
  string[] fields = csvParser.ReadFields();
  string Name = fields[0];
  string Address = fields[1];
 }
}

记得添加对微软的引用。VisualBasic

关于解析器的更多细节请参见:http://codeskaters.blogspot.ae/2015/11/c-easiest-csv-parser-built-in-net.html

LINQ:

var lines = File.ReadAllLines("test.txt").Select(a => a.Split(';'));
var csv = from line in lines
          select (from piece in line
                  select piece);

^^错误-尼克编辑

原来的应答者似乎试图用一个2维数组填充csv -一个包含数组的数组。第一个数组中的每一项都包含一个表示行号的数组，嵌套数组中的每一项都包含该特定列的数据。

var csv = from line in lines
          select (line.Split(',')).ToArray();

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;
    }
}