Loading a .csv file into dictionary, I keep getting the error “cannot convert from 'string[]' to 'string'”

问题

I've used streamreader to read in a .csv file, then i need to split the values and put them into a dictionary. so far i have:

namespace WindowsFormsApplication2
{
public partial class Form1 : Form
{
Dictionary<string, string> dict = new Dictionary<string, string>();   
    public Form1()
    {
        InitializeComponent();
    }
    private void Form1_Load(object sender, EventArgs e)
    {
        using (StreamReader reader = new StreamReader("textwords0.csv"))
        {
            string line;
            while ((line = reader.ReadLine()) != null)
            {
                string[] parts = line.Split(',');
                dict.Add(parts[0], parts[1]);
            }
        }
    }

I keep getting the error "cannot convert from 'string[]' to 'string'" but cant work out how to fix it.

Thanks in advance!

update: ...I accidentally left the csv file open and its working now, sorry for wasting time guys thought i had a different spreadsheet open, some very useful advice though thanks for all the help!

回答1:

If you're using .NET 4.0, the following is really succinct and should accomplish the same thing:

var dict = File.ReadLines("textwords0.csv").Select(line => line.Split(',')).ToDictionary(line => line[0], line => line[1]);

回答2:

the error is actually because of the ',' you are inputting. It needs an "array" of characters to split from. Here is an example method of splitting using string.split.

string[] parts = line.Split(new string[] { "," }, StringSplitOptions.None);

Hope this helps. this is presuming this is the line the error is coming from as you havn't specified.

来源：https://stackoverflow.com/questions/9791393/loading-a-csv-file-into-dictionary-i-keep-getting-the-error-cannot-convert-fr