//int 数组转string数组

int [] test={,,,};

string result=test.Select(i => i.ToString()).ToArray();

//int 数组转 string中间用逗号隔开

int [] test={,,,};

string result=string.Empty;

for (int i = ; i < test.length; i++)

{

   if(i==test.length-)

      result=test[i].ToString();

   else

    result=test[i]+",";

}