how to iterate through through Arraylist

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Hi,
My WebMethod returns arraylist like this:

C#

 [WebMethod]
    public static ArrayList ProcessIT(string strpid)
    {
      DataTable dt = new DataTable();
      ArrayList list = new ArrayList();
      string queryString = "select * from Registration where RegNo='"+strpid+"' and Deleted=1";
      using (SqlConnection con = new SqlConnection("Server=op- maurya;Database=DishaEyeHospitals;User ID=sa;Password=Password123;Trusted_Connection=False;"))
        {
            using(SqlCommand cmd = new SqlCommand(queryString, con))
             {
                con.Open();
                SqlDataAdapter adp = new SqlDataAdapter(cmd);
                adp.Fill(dt);
                foreach(DataRow dr in dt.Rows)
                    {
                        list.Add(dr);
                    }
              }       
        }
        return list;
    }
it work fine but i want to iterate this list in javascript
<script>
function getpid()
{
var _pid=document.getElementById('<%=txtpid.ClientID %>').value;
alert(_pid);

PageMethods.ProcessIT(_pid,onSucess,onError);
function onSucess(result) 
{
    for (var i in result) 
     {
       alert(response[i]);
     }
     return true;
}
function onError(result) 
{
    alert("Error");
  for (var i in result) 
     {
       alert(response[i]);
     }
     
     return false;
}
}   
</script>

Posted 2-Jun-13 20:12pm

Member 8233601

Updated 2-Jun-13 20:27pm

v2

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Comments

Sergey Alexandrovich Kryukov 3-Jun-13 2:18am

How come you call it JavaScript?
—SA

Member 8233601 3-Jun-13 2:20am

OnClientClick="return getpid()"

Sergey Alexandrovich Kryukov 3-Jun-13 2:26am

And..?
Look, tag what's applicable and ask a question accurately...
—SA

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Sergey Alexandrovich Kryukov · Accepted Answer · 2013-06-02T20:24:00

This looks like C#, not JavaScript. :-)

If so, you should never use ArrayList. This type was rendered obsolete as early as by v.2.0, when generics were introduced. Formally, the class wasn't marked with [Obsolete] attribute only because there is nothing wrong with leaving it in some legacy code, but in new development it never makes any sense. Use System.Collections.Generic.List<> instead.

The iteration is done exactly as you did with your data rows:

C#

System.Collections.Generic.List<SomeType> list = new System.Collections.Generic.List<SomeType>();
//...
foreach (SomeType item in list) { /* ... */ }

This code can be shortened with type inference:

C#

var list = new System.Collections.Generic.List<SomeType>();
//...
foreach (var item in list) { /* ... */ }

—SA