C# 将数组、集合、可枚举类型转换成逗号分隔的字符串(String.Join)

  C# 将数组、集合、可枚举类型转换成逗号分隔的字符串(String.Join)

C# Code:


public const int MAX_KEYWORDS = 20;

string searchInput="123,3456,347,234,5612,345,234,52,345,2as,fg,wert,w,ert,w,ert,24,56,347,";

//分解关键字，去掉空的关键字
string[] items = searchInput.Split(new char[] { char.Parse(",") }, StringSplitOptions.RemoveEmptyEntries);

//去重复关键词
items = items.Distinct().ToArray();

if (items.Length > MAX_KEYWORDS)
{
  string[] copy = new string[MAX_KEYWORDS];
  Array.Copy(items, 0, copy, 0, MAX_KEYWORDS);//复制数组
  
  //C# 将数组、集合、可枚举类型转换成逗号分隔的字符串(String.Join)
   return String.Join(",", copy);
}
else
{
  return String.Join(",", items);
}

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