Get Data Using Web Services and JavaScript

This code snippet for Get Data Using Web Services and JavaScript.

using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Web.Script.Serialization;


[WebMethod(EnableSession = true)]
public List<string> GetData(string VALUE1, string VALUE2)
{
    SQLHelper objHelper = new SQLHelper();
    IDataReader reader = null;
    List<string> result = new List<string>();

    try
    {
        string strQuery = "Select * from TABLE where VALUE='"
            + VALUE1 + "' and VALUE='" + VALUE2 + "' ";

        reader = objHelper.getReaderFromQuery(strQuery);

        while (reader.Read())
        {
            for (int i = 0; i < reader.FieldCount; i++)
                result.Add(Convert.ToString(reader[i]));
        }
    }
    catch (Exception ex)
    {
    }
    finally
    {
        if (reader != null)
            reader.Close();
    }

    return result;
}

<script type="text/javascript" language="javascript">

    function getWebData(value1, value2)
    {

        myService.GetData(value1, value2, bindData, null, null);
    }

    function bindData(result)
    {
        var Data="";

    if(result=='')
    {
        document.getElementById('divDetails').innerHTML='No Record Found!';
    }
    else
    {
                for(var i=0;i<result.length;i=i+4)
                {
                        if((i/3)%3==0)
                            Data=Data+'<tr class="Purple"><td align="center">'+result[i]+'</td><td>'
                +result[i+1]+'</td><td align="right">'+result[i+2]+'</td><td align="Center">'
                +result[i+3]+'</td></tr>';
                        else if((i/3)%3==1)
                            Data=Data+'<tr class="Blue"><td align="center">'+result[i]+'</td><td>'
                +result[i+1]+'</td><td align="right">'+result[i+2]+'</td><td align="Center">'
                +result[i+3]+'</td></tr>';
                        else if((i/3)%3==2)
                            Data=Data+'<tr class="Green"><td align="center">'+result[i]+'</td><td>'
                +result[i+1]+'</td><td align="right">'+result[i+2]+'</td><td align="Center">'
                +result[i+3]+'</td></tr>';
                        else
                            Data=Data+'<tr class="Gray"><td align="center">'+result[i]+'</td><td>'
                +result[i+1]+'</td><td align="right">'+result[i+2]+'</td><td align="Center">'
                +result[i+3]+'</td></tr>';
                }
                document.getElementById('divDetails').innerHTML = Data;
    }
     }

</script>