如何从 C# 中的数组中获取逗号分隔的字符串?
给定一个数组,现在我们的任务是从给定数组中获取一个逗号分隔的字符串。所以我们可以使用 String.Join() 方法来完成这个任务。此方法借助数组的每个项之间的逗号分隔符连接数组的项。
句法:
String.Join(",", array_name)
其中 array_name 是输入数组。
例子:
Input: {"sireesha", "priyank", "ojaswi", "gnanesh"}
Output: sireesha,priyank,ojaswi,gnanesh
Input: {"sireesha", "priyank"}
Output: sireesha,priyank
方法一:
- 声明一个字符串数组。
- 使用字符串join()函数获取逗号分隔的字符串。
String.Join(",", names)
- 显示最终结果。
例子:
C#
// C# program to display the comma separated
// string from an array
using System;
class GFG{
public static void Main()
{
// Creating an array of string elements
String[] names = { "sireesha", "priyank",
"ojaswi", "gnanesh" };
// Join the elements separated by comma
// Using Join() method
var str1 = String.Join(",", names);
// Display the final string
Console.WriteLine(str1);
}
}
C#
// C# program to display the comma separated
// string from an array
using System;
using System.Linq;
// MyEmployee class
class MyEmployee
{
public string First_Name { get; set; }
public string Last_Name { get; set; }
}
class GFG{
public static void Main()
{
// Creating object array of MyEmployee
MyEmployee[] e = {
new MyEmployee(){ First_Name = "Sumi", Last_Name = "Goyal" },
new MyEmployee(){ First_Name = "Mohan", Last_Name = "Priya" },
new MyEmployee(){ First_Name = "Sumit", Last_Name = "Singh" }
};
// Join the elements separated by comma
// Using Join() method
var res = String.Join(",", e.Select(m => m.First_Name));
// Display the final result
Console.WriteLine("Final String:" + res);
}
}
输出:
sireesha,priyank,ojaswi,gnanesh
方法二:
我们还可以从对象数组中找到命令分隔的字符串。
- 使用 First_Name 和 Last_Name 方法创建一个名为 MyEmployee 的类。
- 在 main 方法中声明 MyEmployee 的对象数组。
- 使用字符串join()函数获取逗号分隔的字符串。
String.Join(",", e.Select(m => m.First_Name));
在这里,我们只加入了名字,所以我们使用 select 方法来选择员工的 First_Name。
- 显示最终结果。
示例 2:
C#
// C# program to display the comma separated
// string from an array
using System;
using System.Linq;
// MyEmployee class
class MyEmployee
{
public string First_Name { get; set; }
public string Last_Name { get; set; }
}
class GFG{
public static void Main()
{
// Creating object array of MyEmployee
MyEmployee[] e = {
new MyEmployee(){ First_Name = "Sumi", Last_Name = "Goyal" },
new MyEmployee(){ First_Name = "Mohan", Last_Name = "Priya" },
new MyEmployee(){ First_Name = "Sumit", Last_Name = "Singh" }
};
// Join the elements separated by comma
// Using Join() method
var res = String.Join(",", e.Select(m => m.First_Name));
// Display the final result
Console.WriteLine("Final String:" + res);
}
}
输出:
Final String:Sumi,Mohan,Sumit