protected void Page_PreRender(object sender, EventArgs e)
{
if (ddlClass.SelectedItem == null || ddlMedium.SelectedItem == null)
{
ddlClass.DataBind();
ddlMedium.DataBind();
CheckBoxListSubjects.DataBind();
}
var subjectTables =
PageDataService.GetAllSubjectTableRecordsForClassAndMediumAdoNet(Convert.ToInt32(ddlClass.SelectedItem.Value),
Convert.ToInt32(ddlMedium.SelectedItem.Value));
foreach (ListItem listItem in CheckBoxListSubjects.Items)
{
listItem.Selected = false;
}
var listItems = (from ListItem listItem in CheckBoxListSubjects.Items
join subjectTable in subjectTables on listItem.Value equals Convert.ToString(subjectTable.SubjectId)
select listItem);
foreach (var listItem in listItems)
{
listItem.Selected = true;
}
}
