asp.net 数组删除重复值

结合网上的资料，自己记录一下 //1.把字符串转换成数组 string ls_str="122,158,141,236,896,123,122,158,141"; string[] str_num=ls_str.ls_str(','); //2.定义ArrayList,判断数组中重复字段不添加到 ArrayList对象中 ArrayList al = new ArrayList(); for (int i = 0; i < str_num.Length; i++) { 　　//判断是否已经存在 if (al.Contains(str_num[i]) == false) { al.Add(str_num[i]); } } //3.将arrayList转换成数组 str_num= new String[al.Count]; str_num= (string[])al.ToArray(typeof(string));