html xmlns="http://www.w3.org/1999/xhtml"> 
head runat="server"> 
  title>数组删除重复值/title> 
/head> 
body> 
  form id="form1" runat="server"> 
  div> 
    数组删除前： 
    asp:Label ID="lblResult1" runat="server">/asp:Label> 
    br /> 
    数组删除后： 
    asp:Label ID="lblResult2" runat="server">/asp:Label> 
  /div> 
  /form> 
/body> 
/html>

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using System.Web.UI; 
using System.Web.UI.WebControls; 
using System.Collections; //引用 
   
public partial class NetObjects_数组_删除重复值 : System.Web.UI.Page 
{ 
  protected void Page_Load(object sender, EventArgs e) 
  { 
    string strNum = "168,145,150,148,333,888,666,168,144"; 
    //输出原数组 
    lblResult1.Text = strNum; 
    string[] arrNum = strNum.Split(','); 
    ArrayList al = new ArrayList(); 
    for (int i = 0; i  arrNum.Length; i++) 
    { 
      //判断数组值是否已经存在 
      if (al.Contains(arrNum[i]) == false) 
      { 
        al.Add(arrNum[i]); 
      } 
    } 
    //把ArrayList转换数组 
    arrNum = new string[al.Count]; 
    arrNum = (string[])al.ToArray(typeof(string)); 
    //输出删除后数组 
    string result = ""; 
    for (int j = 0; j  arrNum.Length; j++) 
    { 
      if (j != 0) 
      { 
        result += ","; 
      } 
      result += arrNum[j]; 
    } 
    lblResult2.Text = result; 
  } 
}