如何将数据从CSV分配到对象

问题描述

到目前为止，我有一款非常好用的

 private static MovieItem readCSV(string path)
    {
      var yourData = File.ReadAllLines(path)
                   .Skip(1)
                   .Select(x => x.Split(';'))
                   .Select(x => new Movie
                   {

                     GUID = x[0],Title = x[1],ISBN = x[2],CreatedTime = DateTime.Now,Authorinformation = new Authorinformation()
                     {
                       Id = Guid.NewGuid().ToString(),Name = x[4],Address = x[5],Age = x[6]
                     }
                   }).ToArray();

      return yourData[0];

    }

我的问题是，是否有更好的方法分配对象？ 到目前为止，我喜欢GUID = x[0],Title = x[1]等等……这不好，因为第一行的标题可以更改，所以我想保持灵活性。 有没有办法分配例如GUID到名为GUID的CSV标头中？ 就像寻找标题名称，如果它等于GUID，将内容分配给GUID吗？

CSV文件：

解决方法

我已经评论了您的问题，但这是示例代码：

1-创建一个班级，并将其命名为“ Book”或其他方便的名称。它的字段是GUID，标题，ISBN等。

public class Book //I'm showing only one field of the class
{
    private string title;
    public string Title { get; set;}

    public Book() {}
}

2-一次性读取CSV文件，您将仅读取第一行并将其拆分为字符串[]数组-您的拆分器为“;”-，并将每个字段的索引存储到变量中（Switch语句为这里很有帮助）

    public struct Headers   //use it to store the index of each field in the file only title is shown here
    {
        public int title;
    }
    string[] rowSplitter = new string[] { "\r\n" };
    string[] colSplitter = new string[] { ";" };


//Inside a method for reading the file use the following code    
    string[] csvData = File.ReadAllText(csvFile).Split(rowSplitter,StringSplitOptions.RemoveEmptyEntries);
    string[] headerRow = csvData [0].Split(colSplitter,StringSplitOptions.None);
    Headers column = new Headers();
    for (int i = 0; i < headerRow.Length; i++)
    {
        switch (headerRow[i].ToLower())
            {
                case "title":
                    column.title = i;
                    break;
            }
    }

3-使用循环遍历所有行，用“;”分隔再次，在此循环中，实例化具有相应数据cuz的Book（）对象，现在您知道每个数据项的索引-我提到的变量。

    for (int i = 1; i < csvData.Length; i++)
    {
        string[] currentRow = csvData[i].Split(colSplitter,StringSplitOptions.None);
        Book bookItem = new Book();
        bookItem.Title = currentRow[column.title];
//Here you can do whatever you like with this bookItem on-the-fly or if you want to keep it to the end of your code add it to a list.
    }

,

            //reading all the lines(rows) from the file.
            string[] rows = File.ReadAllLines(Directory.GetFiles(@"D:\CSV\test.csv"));

            DataTable dtData = new DataTable();
            string[] rowValues = null;
            DataRow dr = dtData.NewRow();

            //Creating columns
            if (rows.Length > 0)
            {
                foreach (string columnName in rows[0].Split(','))
                    dtData.Columns.Add(columnName.Replace(" ","").ToLower());
            }

            //Creating row for each line.(except the first line,which contain column names)
            for (int row = 1; row < rows.Length; row++)
            {
                rowValues = rows[row].Split(',');
                dr = dtData.NewRow();
                dr.ItemArray = rowValues;
                dtData.Rows.Add(dr);
            }