有时我们会处理一些带分隔符数据文本文件。例如，使用”,”分隔的数据，如下图：
然后它们存储到文本文件有这样的列：
在我们读取这个文件之前，先建一个实体类：
1: /// <summary>
2: /// Customer entity
3: /// </summary>
4: /// Author Petter Liu http://wintersun.cnblogs.com
5: public class Customer
6: {7: public string Firstname { get; set; }
8: public string Lastname { get; set; }
9: public string JobTitle { get; set; }
10: public string City { get; set; }
11: public string Country { get; set; }
12: }
接着我们使用LINQ读取整个文件：
1: var query = from line in File.ReadAllLines(filePath)
2: let customerRecord = line.Split(',')
3: select new Customer()
4: { 5: Firstname = customerRecord[0], 6: Lastname = customerRecord[1], 7: JobTitle = customerRecord[2], 8: City = customerRecord[3], 9: Country = customerRecord[4] 10: };11: foreach (var item in query)
12: {13: Console.WriteLine("{0}, {1}, {2}, {3}, {4}"
14: , item.Firstname, item.Lastname, item.JobTitle, item.City, item.Country); 15: }要读取可以带条件的记录也可以,我们filter出Country是UK:
1: var query = from c in
2: (from line in File.ReadAllLines(filePath)
3: let customerRecord = line.Split(',')
4: select new Customer()
5: { 6: Firstname = customerRecord[0], 7: Lastname = customerRecord[1], 8: JobTitle = customerRecord[2], 9: City = customerRecord[3], 10: Country = customerRecord[4] 11: })12: where c.Country == "UK"
13: select c;另一例子：
1: var query = from c in
2: (from line in File.ReadAllLines(filePath)
3: let customerRecord = line.Split(',')
4: select new Customer()
5: { 6: Firstname = customerRecord[0], 7: Lastname = customerRecord[1], 8: JobTitle = customerRecord[2], 9: City = customerRecord[3], 10: Country = customerRecord[4] 11: })12: where c.JobTitle.Contains("Sales")
13: select c;
Author: Petter Liu http://wintersun.cnblogs.com
希望这篇POST对您有帮助。