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使用linq读取分隔符文本文件

来源:ZzWww 编辑:ZzWww 时间:2018-07-02

如下图:
使用linq读取分隔符文本文件

然后它们存储到文本文件有这样的列:
复制代码 代码如下:
First Name
Last Name
Job Title
City
Country


在我们读取这个文件之前,先建一个实体类:

复制代码 代码如下:
/// <summary>
/// Customer entity
/// </summary>
public class Customer{
public string Firstname { get; set; }
public string Lastname { get; set; }
public string JobTitle { get; set; }
public string City { get; set; }
public string Country { get; set; }
}

接着我们使用LINQ读取整个文件:
复制代码 代码如下:
var query = from line in File.ReadAllLines(filePath)
let customerRecord = line.Split(',')
select new Customer()
{
Firstname = customerRecord[0],
Lastname = customerRecord[1],
JobTitle = customerRecord[2],
City = customerRecord[3],
Country = customerRecord[4]
};
foreach (var item in query)
{
Console.WriteLine("{0}, {1}, {2}, {3}, {4}"
, item.Firstname, item.Lastname, item.JobTitle, item.City, item.Country);
}

要读取可以带条件的记录也可以,我们filter出Country是UK:
复制代码 代码如下:
var query = from c in
(from line in File.ReadAllLines(filePath)
let customerRecord = line.Split(',')
select new Customer()
{
Firstname = customerRecord[0],
Lastname = customerRecord[1],
JobTitle = customerRecord[2],
City = customerRecord[3],
Country = customerRecord[4]
})
where c.Country == "UK"
select c;


另一例子:

复制代码 代码如下:
var query = from c in
(from line in File.ReadAllLines(filePath)
let customerRecord = line.Split(',')
select new Customer()
{
Firstname = customerRecord[0],
Lastname = customerRecord[1],
JobTitle = customerRecord[2],
City = customerRecord[3],
Country = customerRecord[4]
})
where c.JobTitle.Contains("Sales")
select c;


TAG标签:使用 读取 文本 分隔符 Linq

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