asked on

Custom Page Class

A solution was given here:
https://www.experts-exchange.com/questions/23482039/iframe-and-parent-page-refresh.html
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Ok in that case you could create a custom page class derived from System.Web.UI.Page and write the above code in that file . In those 10 pages where you need this functionality , dervie them from this custom page class . How ever note that we are refering to elements from the client side as parent.document.getElementById('DropDownList1'). etc . So the expectation is that you have a drop down named 'DropDownList1' in all those 10 pages .
>>>>>>>>>

Can anyone show me how to do this?

ASKER CERTIFIED SOLUTION

codeclay

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codeclay

Which ever page needs that script , just inherit it from that custom page class like in the below snippet .

public partial class ClientSideOptionAdd :QPage

The code below is the codebehind of the aspx page where the client side add happens .

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
 
public partial class ClientSideOptionAdd :QPage 
{
    protected override void OnInit(EventArgs e)
    {
        base.OnInit(e);
    }
    protected void Page_Load(object sender, EventArgs e)
    {
        if (IsPostBack)
        {
            string strClientAddedValues = HiddenField1.Value;
            if (strClientAddedValues.Trim() != String.Empty)
            {
                string[] str = strClientAddedValues.Split(new char[] { ',' });
                DropDownList1.Items.Add(new ListItem(str[0], str[1]));
                HiddenField1.Value = String.Empty;
            }
        }
    }
}

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digitalZo

ASKER

Thanks for your help but unfortunately that didn't work.

#1 On page load itself, it submits and gives the error "state" is null or void.

#2 it's giving the same problem as in the previous thread. that is when the value adds in the dropdown but when i do an autopostback from a different dropdown, the value disappears and i've to click refresh.

digitalZo

ASKER

sorry gives the error: state" is null or not an object.