I have a checkbox column that when checked / unchecked, causes the propertychanged event on the datasource to only fire once. If I submit the changes, then the event will fire again, but only once.
Am I missing something or shouldn't the event fire everytime a checkbox is checked/unchecked in the grid? Below is the event handler that I set up on the datasource's propertychanged event as well as the event declaration.
public MainPage(){ InitializeComponent(); context.PropertyChanged += new System.ComponentModel.PropertyChangedEventHandler(context_PropertyChanged);}
void context_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e){ if (!context.IsLoading && !context.IsSubmitting && e.PropertyName.Equals("HasChanges")) { Row r = gridForecastSchedule.Rows[0]; if (r != null) { HeaderCellControl hcc = (HeaderCellControl)((RowsManager)r.Manager).HeaderRow.Cells["Suppress"].Control; if (hcc != null) { CheckBox headerCB = hcc.Content as CheckBox; if (headerCB != null) { headerCB.Checked -= All_Checked; headerCB.Unchecked -= All_Checked; headerCB.IsChecked = (context.ForecastScheduleWorkModels.Count() > 0 && context.ForecastScheduleWorkModels.Where(a => a.Suppress.Equals(false)).Count() == 0); headerCB.Checked += new RoutedEventHandler(All_Checked); headerCB.Unchecked += new RoutedEventHandler(All_Checked); } } } }
if (context.HasChanges && (!context.IsLoading && !context.IsSubmitting)) btnSave.IsEnabled = true; else btnSave.IsEnabled = false;
if (context.IsSubmitting) { busyDialog.IsBusy = true; }}
Hi,
I’m not sure I understand your application design.
I gather that you are asking if the “context” propertyChanged event would fire when the checkbox is checked and unchecked. But I am not clear about what is the “context”. Is that your grid’s datasource? Is the checkbox bound to your datasource?
Please attach a small sample that duplicates this behavior using Northwind so that I can investigate your implementation.
"context" is the grid's datasource. It is a wcf ria service and I declared it like:
Foreasting.ForecastContext context = new Foreasting.ForecastContext();
The following code is the query that is ran and bound to the gird.
EntityQuery<Foreasting.ForecastScheduleModel> query = context.GetForecastScheduleModelQuery(iForecastID); context.Load(query, (ab) => { gridForecastSchedule.ItemsSource = ab.Entities; EditableColumn suppressCol = gridForecastSchedule.Columns["Suppress"] as EditableColumn; suppressCol.IsReadOnly = true; suppressCol.Visibility = System.Windows.Visibility.Collapsed; btnSave.Visibility = System.Windows.Visibility.Collapsed; busyDialog.IsBusy = false; busyDialog.BusyContent = "Please wait while data is saved..."; }, null);
Editing and saving of the data works fine. The propertyChanged event will only fire the first time a change has been made after data has been loaded or saved. So, if I check a checkbox, the event will fire. If I check a second checkbox, the event does not fire. If I save my changes and then click a checkbox, the event will fire again, but only once until I reload the data or save the data.
So I'm wondering if that's the default behavior or if it should fire every time a checkbox is checked / unchecked?
I am still unable to reconstruct a sample based on the details that you’ve provided so far. I’ve created a simple sample that uses RIA services against the Northwind database. I hoping that you can add the details of how or where you application is implementing the PropertyChanged event in my sample.
Please modify it as needed, adding the PropertyChanged event as you are using it and any other features that are necessary to replicate the behavior you are seeing.
Please zip up the modified sample and reattach it to your forum thread.
I hadn’t heard back from you. I was wondering if you had any questions or if I could help further.
If so, please feel free to contact me.