For some event, the subscription by hooking the event directly object is failing but working when you use a local variable.
I haven't figured out why yet, who does?
I came across this mystery as I start working with CommandBarsEvents.OnUpdate, in order to detect interaction with a shape, what can comes with certain problems as described here.
There are other events with that problem?
to keep clear here comes an (incomplete) overview of events which are affected and which not
events what DO need a local variable
this.Application.CommandBars.OnUpdate
.
Their code has to be like this:
using Office = Microsoft.Office.Core;
namespace Project
{
public partial class AddIn
{
private Office.CommandBars commandBars; //declaration of local variable
private void ThisAddIn_Startup(object sender, System.EventArgs e)
{
commandBars = this.Application.CommandBars; //initialization of local variable
commandBars.OnUpdate += new Office._CommandBarsEvents_OnUpdateEventHandler(commandBars_OnUpdate); //"indirect" subscription to event`
}
}
}
events what NOT need a local variable
((InteropExcel.AppEvents_Event)Application).NewWorkbook
this.Application.WorkbookNewSheet
this.Application.WorkbookOpen
.
Their code can be like this:
using Office = Microsoft.Office.Core;
namespace Project
{
public partial class AddIn
{
private void ThisAddIn_Startup(object sender, System.EventArgs e)
{
((InteropExcel.AppEvents_Event)Application).NewWorkbook += new InteropExcel.AppEvents_NewWorkbookEventHandler(Excel_NewWorkbook_EventHandler); //"direct" subscription to event`
}
}
}
Related
I need to pass an object with some information to consume in my Background Task. I try to search in web but not found any solution. It is possible?
One workarround is save information what I need to pass in isolated storage in my MainProjet and in my BackgroundTask project consume information saved before. But this solution is not beautiful to use.
Someone help me?
Thanks in advance
You can use SendMessageToBackground method
var message = new ValueSet();
message.Add("key",value);
BackgroundMediaPlayer.SendMessageToBackground(message);
In background task listen to this method
public void Run(IBackgroundTaskInstance taskInstance)
{
BackgroundMediaPlayer.MessageReceivedFromForeground += BackgroundMediaPlayer_MessageReceivedFromForeground;
}
private void BackgroundMediaPlayer_MessageReceivedFromForeground(object sender, MediaPlayerDataReceivedEventArgs e)
{
foreach (string key in e.Data.Keys)
{
switch (key.ToLower())
{
}
}
}
In a cross platform Xamarin app built with the MvvmCross framework I'm using a ToggleButton Widget in an Android .axml layout. I've bound the Checked property to a View Model property using a converter using the following binding syntax:
Checked MarketBuySellViewModel.Direction, Converter=DirectionBool, ConverterParameter='Sell'
Everything works well. On the iOS side, it appears you can use UIButton as a ToggleButton by using the Selected property. This implies that the following binding should achieve what I want on iOS:
set.Bind (SellButton).For(b => b.Selected).To (vm => vm.MarketBuySellViewModel.Direction).WithConversion("DirectionBool", "Sell");
I don't get any binding errors in the application output but the binding itself doesn't seem to work. Clicking the button doesn't set the Direction property and setting the direction to a different value does not set the Selected property on the UIButton.
Do I need to create a Custom Binding or am I simply setting up the binding incorrectly?
I also tried using a UISegmentedControl to achieve the same effect. Is binding to this control supported at all in MvvmCross? I don't see any reference to it in the source code. Does this mean I need to create custom bindings for it too?
For the UIButton, I don't believe there's any included Selected binding built into MvvmCross. Because of this - and because Selected doesn't have a simple paired event SelectedChanged, then I believe Selected binding should work one-way (from ViewModel to View) but not two-way.
There is a binding for the On of a UISwitch control and that's the control I've seen used most in these situations.
If you wanted to add a custom 2-way binding for Selected then I guess you'd have to do this using the ValueChanged event (but would need to check that is correct).
To do so, you'd just build a target binding something like:
public class MvxUIButtonSelectedTargetBinding : MvxPropertyInfoTargetBinding<UIButton>
{
public MvxUIButtonSelectedTargetBinding(object target, PropertyInfo targetPropertyInfo)
: base(target, targetPropertyInfo)
{
var view = View;
view.ValueChanged += HandleValueChanged;
}
private void HandleValueChanged(object sender, System.EventArgs e)
{
var view = View;
if (view == null)
return;
FireValueChanged(view.Selected);
}
public override MvxBindingMode DefaultMode
{
get { return MvxBindingMode.TwoWay; }
}
protected override void Dispose(bool isDisposing)
{
base.Dispose(isDisposing);
if (isDisposing)
{
var view = View;
if (view != null)
{
view.ValueChanged -= HandleValueChanged;
}
}
}
}
and this could be registered in Setup in protected override void FillTargetFactories(IMvxTargetBindingFactoryRegistry registry) using something like:
registry.RegisterPropertyInfoBindingFactory(typeof(MvxUIButtonSelectedTargetBinding), typeof(UIButton),
"Selected");
Similarly, I don't believe anyone has added a two way UISegmentedControl binding yet - but would happily see one added.
Building a two way UISegmentedControl binding would be quite straight-forward - you'd just have to bind to the pair SelectedSegment and ValueChanged - with code similar to above.
Alternatively, you could switch to using a custom MySegmentedControl which had a nicer Value`ValueChanged` pair which would automatically work without a custom binding - e.g.:
public class MySegmentedControl : UISegmentedControl
{
// add more constructors if required
public int Value
{
get { return base.SelectedSegment; }
set { base.SelectedSegment = value; }
}
}
If any or all of these custom bindings are needed, then the Mvx project is happy to get these bindings added as issues or pull requests along with test/demo UIs in the https://github.com/slodge/MvvmCross-Tutorials/blob/master/ApiExamples/ApiExamples.Touch/Views/FirstView.cs project
Could be helpful to someone else, so i'm sharing my experience. I needed a two way binding for UISegmentedControl.SelectedSegment property to a ViewModel. The one way biding (ViewModel => View) works by default. I couldn't able to properly utilize the solution proposed by Stuart - to subclass the UISegmentedControl. I tried to ensure that the linker does not rip off the new custom control code, but this didn't help me a bit. So a perfectly viable solution is the one with MvxPropertyInfoTargetBinding. Here is the code working ok for me:
public class MvxUISegmentedControlSelectedSegmentTargetBinding : MvxPropertyInfoTargetBinding<UISegmentedControl>
{
public MvxUISegmentedControlSelectedSegmentTargetBinding(object target, PropertyInfo targetPropertyInfo)
: base(target, targetPropertyInfo)
{
this.View.ValueChanged += HandleValueChanged;
}
private void HandleValueChanged(object sender, System.EventArgs e)
{
var view = this.View;
if (view == null)
{
return;
}
FireValueChanged(view.SelectedSegment);
}
public override MvxBindingMode DefaultMode
{
get { return MvxBindingMode.TwoWay; }
}
protected override void Dispose(bool isDisposing)
{
base.Dispose(isDisposing);
if (isDisposing)
{
var view = this.View;
if (view != null)
{
view.ValueChanged -= HandleValueChanged;
}
}
}
}
public class Setup : MvxTouchSetup
{
...
protected override void FillTargetFactories(IMvxTargetBindingFactoryRegistry registry)
{
registry.RegisterPropertyInfoBindingFactory(typeof(MvxUISegmentedControlSelectedSegmentTargetBinding), typeof(UISegmentedControl), "SelectedSegment");
}
}
This is a test program. I just created a simple Windows application form with one button, and if the button is clicked, I need it to do something. So, I wrote my code as:
IWebDriver driver;
public Form1()
{
InitializeComponent();
}
public void SetupTest()
{
driver = new FirefoxDriver();
}
private void button1_Click(object sender, EventArgs e)
{
driver.Navigate().GoToUrl("webaddress");
driver.FindElement(By.TagName("Atlast")).Click();
Thread.Sleep(5000);
}
I have included all of the dependencies (both code and references), but I am getting the following error when I click the button:
Object reference not set to an instance of an object. in driver.navigate part of my code..
What mistake did I make here? Can anyone please help me out with this?
private void button1_Click(object sender, EventArgs e)
{
SetupTest()
driver.Navigate().GoToUrl("webaddress");
driver.FindElement(By.TagName("Atlast")).Click();
Thread.Sleep(5000);
}
You need to be calling SetupTest in your button click code. Why? This is where you are creating your new instance of the IWebDriver, therefore it needs to be called otherwise any references to driver will simply refer to null (by default).
I have a ServiceStack Service with a service call like so:
public class MyService : Service
{
public object Get(MyServiceRequest request)
{
using (Profiler.Current.Step("Getting Data"))
{
// code that gets data
using (Profiler.Current.Step("Doing work with data"))
{
// code that does work
}
}
return response;
}
}
and a global.asax.cs like so:
public class Global : System.Web.HttpApplication
{
protected void Application_Start(object sender, EventArgs e)
{
new AppHost().Init();
}
protected void Application_BeginRequest(object sender, EventArgs e)
{
if (Request.IsLocal)
Profiler.Start();
}
protected void Application_EndRequest(object sender, EventArgs e)
{
Profiler.Stop();
}
}
My problem is that when I test the service call through the browser I only see profile information for the overall request. "show time with children" and "show trivial" don't provider any more granular information. I've also placed breakpoints within each using statement to get a look at Profiler.Current and noticed in each case its Children property is null. Am I doing it wrong? Are they any other things I can do to troubleshoot this?
For some reason setting the level argument to Profile.Info in the Step method resolves my issue. That's weird because Profile.Info is the default if no argument is provided. Oh well. Moving on.
I am beginner to C# .net. I have simple app in wpf which access a listbox from user thread. in winforms i can use invokerequired, a equivalent for wpf using dispatcher did not help. My system also hangs for the buttons so debugging is though. Please provide solution for the below code. thanks in advance
private void Monitor_mtd()
{
while (AppStatus != 0)
{
if (flag2 == 1)
{
listBox1.Dispatcher.BeginInvoke(DispatcherPriority.Normal,
new list1MtdDelegate(list1Mtd), "Best practice");
}
}
}
private delegate void list1MtdDelegate(string ls1);
private void list1Mtd(string ls1)
{
listBox1.Items.Add(ls1);
}
private void button1_Click_1(object sender, RoutedEventArgs e)
{
Monitor = new Thread(new ThreadStart(Monitor_mtd));
Monitor.Start();
flag1 = 1;
}
private void button2_Click(object sender, RoutedEventArgs e)
{
flag2 = 1;
}
There are a couple of issues that arise in your approach. Firstly, the way that you bind your data to the ListBox and secondly trying to update the ListBox from a user thread.
You can solve the binding of the ListBox by using an ObservableCollection so that the UI is updated with the necessary values (have a look at this post for more information on this). However, this also raises another problem and that is that the ObservableCollection cannot be called from another thread other than the one it is dispatching (see more on this here also). This means that you need another implementation for the ObservableCollection. Thomas Levesque made an AsyncObservableCollection that can be modified from any thread and still notify the UI when its modified.
I made a sample implementation that you can download here showing the full solution.