【轉】List＜string＞轉List＜int＞ 拼接字符串轉List＜int＞

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原文鏈接：https://blog.csdn.net/qq_33903684/article/details/73176464

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原文鏈接：https://www.cnblogs.com/flywing/p/5912258.html

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1：List<string>轉List<int>

public List<int> ListConvert(List<string> strlist)      
{           
     List<int> intlist = null;          
     try           
     {               
         intlist = strlist.Select<string, int>(a => { return Convert.ToInt32(a); }).ToList(); 
           }          
     catch (Exception)         
     {             
         intlist = null;     
     }        
     return intlist;     
}

2：拼接字符串轉List<int>

List<int> list = ids.TrimEnd(',').Split(',').Select<string, int>(a => Convert.ToInt32(a)).ToList();

ids去除最后一個","，再根據","進行字符串分割，分割后再用Convert.ToInt32將string轉int

3：List<int> 轉List<string> 

List<int> list = new List<int>(new int[] { 1,2,3 } );
List<string> newList = list.ConvertAll<string>(x => x.ToString());

以下原文地址：http://www.sufeinet.com/thread-9610-1-1.html

1：List轉字符串

List<string> List = new List<string>();
string strArray = string.Join(",", List);

2：字符串轉List

string str = "2,4,4,4";
List<string> List=new List<string> (str.Split(','))