protected void Page_Load(object sender, EventArgs e)
{
// initialize database helper
objDB = new DBAccess();
objDB.ErrorLabel = lblError;
btnOk.OnClientClick = string.Format("javascript: {0}.style.visibility = 'hidden'; return false; ", pnlMessage.ClientID);
pnlMessage.Visible = false;
if (!Page.IsPostBack)
{
// do the initial retrieval of the list of CADs
DataTable objCADTable = objDB.GetCADs();
ddlCADId.DataSource = objCADTable;
ddlCADId.DataTextField = "CAD";
ddlCADId.DataValueField = "CAD";
ddlCADId.DataBind();
}
else
{
// retrieve table to be edited from the Session
objDT = (DataTable)Session[ CACHED_TABLE ];
if (objDT != null)
fvEditor.DataSource = objDT;
// retrieve the item template containing the tabs and the columns to use in the formview
DynamicItemTemplate objTemplate = (DynamicItemTemplate)Session[ CACHED_TEMPLATE ];
if (objTemplate != null)
{
fvEditor.EditItemTemplate = objTemplate;
try
{
fvEditor.DataBind();
}
catch (Exception)
{
}
}
// retrieve the table that stores the changed columns and reasons
if (objChangedColumns == null)
{
objChangedColumns = (DataTable)Session[ CACHED_CHANGEDCOLS ];
// if it is not Sessiond, create and Session it
if (objChangedColumns == null)
{
// if table does not exist, create it and Session the structure
objChangedColumns = new DataTable("ChangedColumns");
...
Session[ CACHED_CHANGEDCOLS ] = objChangedColumns;
}
}
// retrieve the index of the currently selected change in the list box of changes
iPreviousIndex = Convert.ToInt32( Session[PREVIOUS_INDEX] );
}
}