Access entity column after click on child button of datalist (after rendered)

See more:

ASP.NET4

As per topic, if any possible to access entity column field values(already been assign from query to DataList and done in rendered)?
I've tried to used the pattern method as same utilised in runtime itemdatabound event and It only gave with result "null".

Markup View:

<ItemTemplate>
<div class="JobProgressListHandle">
<h1 id="JobNumberHeader" runat="server"></h1>
<asp:DataList ID="JobProgressList" CssClass="JobProgressListStyle" DataKeyField="SectionGroup_Id" runat="server" OnItemDataBound="JobProgressList_ItemDataBound">
<ItemTemplate>
<h1 id="SectionHeader" runat="server" style="color:blue;margin-left:16px"></h1>
<div id="JobProgressSectionHandle">
<div id="JobProgressInSection" runat="server">
</div>
</div>
<table>
<tr>
<td>
<asp:Button ID="PrintsectionButton" runat="server" Text="Print" Width="85px" Height="40px" ClientIDMode="Static" OnClick="PrintsectionButton_Click" />
</td>
</tr>
</table>
<br />
</ItemTemplate>
</asp:DataList>
</div>
</ItemTemplate>

Query Assign to DataList "JobList" before JobProgressList

protected void JobList_ItemDataBound(object sender, DataListItemEventArgs e)
{
	if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
        {

 		var querysectionlist = (from query in timesheet.MPTimeSheets
                    where query.PTWON == JobNumberHolder & query.PTCCC == MachineProdId
                 & query.PTCDATE >= StartDateHolder & query.PTCDATE <= EndDateHolder
                    	  select new { 
                           		query.PTWON,
                           		query.SectionGroup_Id,
                           		query.PTITEM,
                    	           }).Distinct().ToList();

		DataList JobProgressList = (DataList)e.Item.FindControl("JobProgressList");
                if (JobProgressList != null)
                 {
                        JobProgressList.DataSource = querysectionlist;
                        JobProgressList.DataBind();
                 }
	}
}

Code Behind (When Press on 'PrintsectionButton' button (Child button on DataList JobProgressList):

protected void PrintsectionButton_Click(object sender, EventArgs e)
{
      try
      {

                Button PrintButton = sender as Button;
                DataListItem ListItem = PrintButton.NamingContainer as DataListItem;
                DataList JobProgressList = (DataList)this.JobList.Controls[1].FindControl("JobProgressList");
                var MachineIdHolder = Convert.ToInt32(this.CostCentreDropDown.SelectedValue);
                DateTime StartDateHolder = DateTime.ParseExact(this.StartPrintDate.Text, "dd/MM/yyyy", System.Globalization.CultureInfo.InvariantCulture);
                DateTime EndDateHolder = DateTime.ParseExact(this.EndPrintDate.Text, "dd/MM/yyyy", System.Globalization.CultureInfo.InvariantCulture);
                var StartDateDay = (StartDateHolder.Day < 10) ? "0" + StartDateHolder.Day.ToString() : StartDateHolder.Day.ToString();
                var StartDateMonth = (StartDateHolder.Month < 10) ? "0" + StartDateHolder.Month.ToString() : StartDateHolder.Month.ToString();
                var StartDateValue = Convert.ToInt32(StartDateHolder.Year.ToString() + StartDateMonth + StartDateDay);
                var EndDateDay = (EndDateHolder.Day < 10) ? "0" + EndDateHolder.Day.ToString() : EndDateHolder.Day.ToString();
                var EndDateMonth = (EndDateHolder.Month < 10) ? "0" + EndDateHolder.Month.ToString() : EndDateHolder.Month.ToString();
                var EndDateValue = Convert.ToInt32(EndDateHolder.Year.ToString() + EndDateMonth + EndDateDay);

                DataListItem JobListItem = ListItem.Parent.NamingContainer as DataListItem;

                if (JobListItem.ItemType == ListItemType.Item || JobListItem.ItemType == ListItemType.AlternatingItem)
                {
                        dynamic SectionGroup = (Object)JobListItem.DataItem;
                        var SectionId = (String)SectionGroup.SectionGroup_Id;
                        File.WriteAllText(@"C:\checkprint.txt", "");
                        File.AppendAllText(@"C:\checkprint.txt", "Check :" + SectionId);
                        
                }
      }
      catch(Exception ex)
      {
               
      }
}

My Question here shoud it be possible to access entity column after runtime (rendered finished)?

What I have tried:

From Point as "dynamic SectionGroup = (Object)JobListItem.DataItem;" where it return nothing.