// constructor
public InvoiceItem_ViewModel()
{
// worker
IIWkr = new lw_InvoiceItems_Worker();
_strMsg = "";
}
// constructor
public Win_LWInvoices()
{
InitializeComponent();
// clear the Invoice Item, and Inv Expense Item lists
clrIIMod_list = new List<lw_InvoiceItems_Model>();
clrIEIMod_list = new List<lw_InvoiceExpenseItems_Model>();
// worker
IIWkr = new lw_InvoiceItems_Worker();
IEIWkr = new lw_InvoiceExpenseItems_Worker();
// LISTENER: Selected data changed
// Handle on WorkOrder selection changed events
uc_InvListing.OnInvoice_SELECTED += (o, e) =>
{
var datagrid = (DataGrid)o;
var itm = datagrid.SelectedItem;
if ((itm is lw_Invoice_Model) == false) return;
lw_Invoice_Model selectedContent = (lw_Invoice_Model)itm;
// display Invoice detail
uc_AssociatedInvoiceData.uc_InvDetail.DataContext = selectedContent;
// display Invoice Items based on selected Invoice
List<lw_InvoiceItems_Model> iiMod_InvoiceID_List = IIWkr.Get_InvoiceItem_byInvoiceID_List(selectedContent.InvoiceID);
uc_AssociatedInvoiceData.uc_InvTabControls.uc_InvItemList.DataContext = iiMod_InvoiceID_List;
// display Invoice Expense Items based on selected Invoice
List<lw_InvoiceExpenseItems_Model> ieiMod_InvoiceID_List = IEIWkr.Get_InvExpensItems_byInvoiceID_List(selectedContent.InvoiceID);
uc_AssociatedInvoiceData.uc_InvTabControls.uc_InvExpItemList.DataContext = ieiMod_InvoiceID_List;
// set the Invoice UPDATE button configuration
uc_AssociatedInvoiceData.uc_InvDetail.Execute_UpdateButtonConfiguration();
labelStatus.Content = "Invoice ID: " + selectedContent.ID;
};
// LISTENER: Selected Date Change
// Handle on Invoice OnSelectedDate_SELECTED event
uc_InvListing.OnInvoiceDate_SELECTED += (o, e) =>
{
// turn on busy Indicator
busy_Indicator.IsBusy = true;
string strDate = o.ToString();
invVM.Get_InvoiceByDate_Async(strDate);
// on Date Selection, clear the Invoice
// Item data grid list
uc_AssociatedInvoiceData.uc_InvTabControls.uc_InvItemList.DataContext = clrIIMod_list;
uc_AssociatedInvoiceData.uc_InvTabControls.uc_InvExpItemList.DataContext = clrIEIMod_list;
labelStatus.Content = "Retrieving data...";
};
// LISTENER: ADD Enabled
uc_AssociatedInvoiceData.uc_InvDetail.OnInvoice_ADDEnabled += (o, e) =>
{
string strInvID = "";
if (txtInvIDSearch.Text != null) strInvID = txtInvIDSearch.Text.Trim();
// turn on busy Indicator
busy_Indicator.IsBusy = true;
// get list of invoices
invVM.Get_Invoice_Async();
// on Date Selection, clear the Invoice
// Item data grid list
uc_AssociatedInvoiceData.uc_InvTabControls.uc_InvItemList.DataContext = clrIIMod_list;
uc_AssociatedInvoiceData.uc_InvTabControls.uc_InvExpItemList.DataContext = clrIEIMod_list;
labelStatus.Content = "Retrieving data...";
};
// LISTENER: UPDATE
uc_AssociatedInvoiceData.uc_InvDetail.OnInvoice_UPDATE += (o, e) =>
{
labelStatus.Content = o.ToString();
// get strInvId
string strInvId = "";
if (txtInvIDSearch.Text != null) strInvId = txtInvIDSearch.Text.Trim();
if (strInvId.Trim() != "")
{
invVM.Get_Invoice_ByLIKEInvoiceID_Async(strInvId);
}
else
{
invVM.Get_Invoice_Async();
}
// on Date Selection, clear the Invoice
// Item data grid list
uc_AssociatedInvoiceData.uc_InvTabControls.uc_InvItemList.DataContext = clrIIMod_list;
uc_AssociatedInvoiceData.uc_InvTabControls.uc_InvExpItemList.DataContext = clrIEIMod_list;
labelStatus.Content = "Retrieving data...";
};
// LISTENER: CANCELED
uc_AssociatedInvoiceData.uc_InvDetail.OnInvoice_CANCELED += (o, e) =>
{
// display message
labelStatus.Content = "";
// turn ON busy Indicator
busy_Indicator.IsBusy = true;
// on Date Selection, clear the Invoice
// Item data grid list
uc_AssociatedInvoiceData.uc_InvTabControls.uc_InvItemList.DataContext = clrIIMod_list;
uc_AssociatedInvoiceData.uc_InvTabControls.uc_InvExpItemList.DataContext = clrIEIMod_list;
// redisplay data in grid
// Get Async Invoice List
invVM.Get_Invoice_Async();
txtInvIDSearch.Text = "";
};
// Listening for ViewModel Property Change
// --------------------------------
// Loading the data grid MVVM style
// --------------------------------
invVM.PropertyChanged += (o, e) =>
{
// the View Model is notifying us that a property was updated
// checking for a specific property returned by the View Model
if (e.PropertyName == "INVList")
{
uc_InvListing.DataContext = invVM.invvmMod_List;
labelStatus.Content = "Retrieved " + invVM.invvmMod_List.Count + " Invoices.";
// turn off busy Indicator
busy_Indicator.IsBusy = false;
// change key board focus
Keyboard.Focus(txtInvIDSearch);
}
};
// Telling the ViewModel to retieve data
invVM.Get_Invoice_Async();
labelStatus.Content = "Retrieving data...";
}
