.NET (Core and Framework)

14-Feb-13 4:38

hi@all!

i have a listview control in my winRT application and, when the user taps a tile, i´d like to save the previously selectedIndex.
i can´t find an appropriate eventhandler to achieve this;
i only found SelectionChanged-event, but, as one might guess, at this particular time the Event is already fired and i retrieve only the new selected index...
can anyone please Point me to the right direction... eh, to the right Event ?
and - if someone knows where to get an elaborated overview for the LifeCycle - as known form ASP.NET pages - that would be highly appreciated... Wink | ;)

thanks in advance, Kind regards,
clodetta

Marco Bertschi15-Feb-13 3:33

15-Feb-13 3:33

Hi Clodetta,

The MouseDown[^]-Event might be worth a try.

Clodetta del Mar15-Feb-13 3:36

15-Feb-13 3:36

hello, Marco.
thank you for your suggestion!!!
i´ll give that a try...
i´m developing for surface, so I thought that this event isn´t what I want...
i´ll report my findings... Smile | :)

until then,
clodetta

edit:
Frown | :-(

that is winforms-related, I guess...

Marco Bertschi15-Feb-13 4:35

15-Feb-13 4:35

Hmm... Can you just look for a similar event in the XAML-control?

Another solution could be that you have a second variable where your current index is stored... You would have to update this variable manually and it would end up kinda unclean but this could be the emergency-solution.

Clodetta del Mar18-Feb-13 22:28

18-Feb-13 22:28

Hi, Marco.
sorry for replying late....
first of all: thank you for your help. Smile | :)

I´ve found several events (ItemClick, Tapped etc) but none of them seem to suit. Cry | :((

your second suggestion leads me back to my initial question:
where to save the old index...?
I wonder what the softie´s intention was when they decided not to implement a SelectedIndex_Changing in addition to SelectedIndex_Changed.
that would solve the issue perfectly...
Sigh | :sigh:

Marco Bertschi18-Feb-13 23:18

18-Feb-13 23:18

Clodetta del Mar wrote:
where to save the old index...?

Create a new control which inherits from the listview control. In the code-behind you can add the logic to handle the case and are maybe able to fire your own, custom selected index changing event...

cheers,
Marco Bertschi

Clodetta del Mar19-Feb-13 0:40

19-Feb-13 0:40

That´s also a good idea, but I have already solved the problem, I think, I´ll leave it at that.
it now works the way it should, that´s sufficient for me!
Thank you again for your help!
kind regards!
clodetta Smile | :)

Marco Bertschi19-Feb-13 1:03

Re: winRT xaml/C# listview selected index [solved]

19-Feb-13 1:03

Clodetta del Mar wrote:
Thank you again for your help!

You are welcome...

cheers,
Marco Bertschi

Clodetta del Mar18-Feb-13 23:09

Replacing Compiled Code for Scheduled Tasks

18-Feb-13 23:09

ok, finally I got it...
it´s more like right through the chest into the eye, but now it works...
a healthy mixture of ListView.SelectedIndex_Change and Grid.GotFocus did the trick for me; now I can save the old AND the new index....

thanks to marco for his suggestions!

post scriptum:
I can´t find the checkbox for marking my thread as solved...
I guess i´m blind...

indian14313-Feb-13 10:57

indian143

13-Feb-13 10:57

Hi All,

I have two scheduled tasks running, I want to replace the compiled code for those scheduled tasks without deleting them. How can I do that step by step.

Any help, like link or suggestion over here helps. Thanks in advance.

Thanks & Regards,

Abdul Aleem Mohammad
St Louis MO - USA

Re: Replacing Compiled Code for Scheduled Tasks

Jibesh13-Feb-13 11:07

Jibesh

13-Feb-13 11:07

You mean replacing the files alone without affecting the schedule task in windows schedule task manager?

Guidelines for posting questions in the forum

Jibesh V P

Re: Replacing Compiled Code for Scheduled Tasks

Dave Kreskowiak13-Feb-13 16:50

Dave Kreskowiak

13-Feb-13 16:50

Just replace the .EXE file the task is going to use?? Just keep in mind the filename cannot change.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak

Entity Framework mapping issue

alex.barylski13-Feb-13 6:32

alex.barylski

13-Feb-13 6:32

Greetings all - I haven't posted here in ages Smile | :)

I am entirely new to .Net having been working in it for a week at most so please go easy and be detailed as possible Smile | :)

I have the following PONO:

Public Class WorkOrderEntity

    Private intTrackingNumber As Integer
    Private intDateReceived As Integer
    Private strManufacturer As String

    Public Property TrackingNumber() As Integer
        Get
            Return intTrackingNumber
        End Get

        Set(value As Integer)
            intTrackingNumber = value
        End Set
    End Property

    Public Property DateReceived() As String
        Get
            ' TODO: Convert timestamp to formatted date
            Return intDateReceived
        End Get

        Set(value As String)
            ' TODO: Convert formatted date to timestamp
            intDateReceived = value
        End Set
    End Property

End Class

The issue I am faced with is how to store date/time as a timestamp (integer) but provide public properties which format/convert accordingly.

I suppose I could provide a an additional getter()/setter() but ideally I wonder if EF has a way of circumventing this "convention"?

Additionally - I am also curious as to whether it's possible to map properties to columns which are not labeled correctly?

Basically if I were working in a existing database (EF automatically builds my PONO with properties named after table fields) I wish to name the fields something more meaningful; some fields for example might be awkward abbreviations but in the object model I want something more English friendly?

I seem to recall being able to do this with Hibernate in java (actually it's PHP port) but never the less does EF support such a feature? Seems obvious that this would be useful in day to day development???

Any ideas?

Regards,
Alex

Richard Deeming13-Feb-13 8:23

Richard Deeming

13-Feb-13 8:23

When you say "timestamp", what do you mean? If it's the SQL timestamp type[^], this has nothing to do with dates:

MSDN:[^]
a data type that exposes automatically generated, unique binary numbers within a database.
The timestamp data type is just an incrementing number and does not preserve a date or a time.

You can map a property to a column with a different name using either the Column attribute[^] or the fluent API[^].

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

alex.barylski13-Feb-13 8:45

alex.barylski

13-Feb-13 8:45

I just found some articles that explain how to change the mapping for tables so I imagine columns are just around the corner. Smile | :)

When I say timestamp I mean a unix timestamp which can easily be converted to date AND/OR time - not sure what MSDN is getting at?!?

In the database I wish to store the date "10/10/2013" as 1381381200 but convert to a human friendly date within the PONO.

My entity objects are high level abstractions but I still prefer to store the time in a numeric format - how does EF solve/address this type mis-match? This is/was the impetus behind OR/M frameworks ain't it? Smile | :)

Regards,
Alex

Richard Deeming13-Feb-13 9:05

Richard Deeming

13-Feb-13 9:05

Ah, OK - "timestamp" in SQL is something totally different.

I don't think there's any built-in way to perform this sort of conversion in the mapping layer. The simplest approach is probably to add a calculated property for the date, decorated with the NotMapped attribute:

VB.NET

Public Class WorkOrderEntity
   Private Shared ReadOnly Epoch As New DateTimeOffset(1970, 1, 1, 0, 0, 0, TimeSpan.Zero)

   <Column("DateReceived")> _
   Public Property DateReceivedTimestamp() As Integer

   <NotMapped> _
   Public Property DateReceived() As DateTimeOffset
      Get
         Return Epoch.AddSeconds(DateReceivedTimestamp)
      End Get
      Set
         DateReceivedTimestamp = CInt(Math.Floor((value - Epoch).TotalSeconds))
      End Set
   End Property
End Class

I'd be inclined to use DateTimeOffset for the property rather than a string; formatting the date should be a UI concern.

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer