Comments by AghaKhan (Top 31 by date)

Thank you kind email. In my solution I am using MVVM design pattern where all the ModelView are in DLL, but I am supplying data to DataContext (ModelViw) from main application. ModelView is creating a timer thread which updates the UI, which try to update the UI and get exception. Now how or where I have to call the CoreDispatcher.RunAsync function. Before your answer I looked http://mikaelkoskinen.net/fixing-coredispatcher-invoke-how-to-invoke-method-in-ui-thread-in-windows-8-release-preview/ and tried to supply ModelView to DLL object with RunAsync function which failed. DLL doesn't know anything about main application and how can (I can't) we update UI thread from DLL? It is a small application and if you want I can send you the application to look at it. Thanks for email.

Best regards
Agha Khan

Where you have created vals. Why are you doing that. This can be done with list<int>. Even your for loop is wrong.
It should be
for (int i = size - 1; i <= 1; I--)
{
vals[i - 1] = vals[i];
}

Got it. Thanks for help. I didn't add in CPP file. :-(

It is linker error. I am calling this class to my C++ Window Store Application

This is strange. I just included simple scrollbar in this application and it is behaving the same.

ScrollViewer.VerticalScrollBarVisibility="Visible" Now I see it design time correctly but Run time same 2 arrows.

My control is ListView
<ListView Name="ListViewSegments" ItemsSource="{Binding SelectedList}" Margin="400,49,18,0" Height="159" VerticalAlignment="Top" ScrollViewer.VerticalScrollBarVisibility="Auto" >
It does not work. Still top right two arrows. The height of the controls is about 150.

Thank you

I created a phone app and it works for me.

It is 5 AM and I just saw your reply. Today I will write a solution for you. Having said that it is very easy to fix. When text box Textchanged its value (One char) (override TextChanged something like this) put focus to next(Lisbox.SelectedIndex)item. Now your next char will be on next TextBox. I hope it will help. Try that if it does not work just let me know. Thank you for asking.

Because it is sample and does not deal the real problem. In fact I want to write something on the image which (The way MSDN explained) will not help. I was not aware MSDN provided that solution but I told in my question that it works in a Task function as MSDN explained. The real solution is what I have provided.

I NOT have to wait because ContinueWith means the Task is compleated. I posted the solution. It works now.

I can write a solution with no problem, but have to understand the question. It is not clear I click "A" letter for the first Textbox and then I want to go to int next TextBox.

It looks like you have listbox and every listboxitem has a TextBox. How many ListboxItem do you have? Is each textBox take only one char as a input? I am not sure what is your question. Please make it clear and I will post the solution! Thanks for asking.

Update:
It looks like I can't add anything to my canvas.

I added this code in callback function as well as in my main function.
Rectangle r2 = new Rectangle();
r2.Height = 100;
r2.Width = 100;
r2.Fill = new SolidColorBrush(Colors.Red);

MyCanvas.Children.Add(r2);

I am unable to add any object to my canvas in my callback funtion. :-(

Who told you that Textboxes are created automatically. That is a wrong information. You don't see it because there is none.

I got it.
WriteableBitmapEx is extension to WriteableBitmap. So just use as WriteableBitmap image.
It works fine.
void MainPage_Loaded(object sender, RoutedEventArgs e)
{
WriteableBitmap writeableBmp = new WriteableBitmap(512, 512);
writeableBmp.Clear(Colors.White);
writeableBmp.DrawLine(1, 2, 30, 40, Colors.Green);
ImageName.Source = writeableBmp;
}

Dear Sergey Alexandrovich Kryukov:
unable to find any sample where it shows how to use this lib. Do you have idea?
Best regards
Agha Khan

Update: Reply from CodePlex.
This is not an issue with the lib. See the samples you can download here in the Source Code repository how to include the lib in your project correctly. Also note that most WBX code is in the Windows.UI.Xaml.Media.Imaging namepsace.

I have to check again. How to add the lib!

Update. Now I included WriteablebitmapEx.WinRT project in my solution. Even then I am unable to use it. It has the same problem I can see inside my object browser but I will not able to use it. Very strange

I tried to build it from source code. It has same problem. There are 3 samples and I tried to run all 3 of them one at a time. Unfortunately none of them worked.

I have sent you cut/paste from my application. I just looked in my Object Browser and copy this path. Assembly WriteableBitmapEx.WinRT
C:\Apps\App2\packages\WriteableBitmapEx.1.0.7.0\lib\NetCore45\WriteableBitmapEx.WinRT.dll

This text is from my output window.
Added file 'WriteableBitmapEx.1.0.7.0.nupkg' to folder 'WriteableBitmapEx.1.0.7.0'.
Successfully installed 'WriteableBitmapEx 1.0.7.0'.
Added reference 'WriteableBitmapEx.WinRT' to project 'App2'
Added file 'packages.config'.
Added file 'packages.config' to project 'App2'
Successfully added 'WriteableBitmapEx 1.0.7.0' to App2.

I don't have any missunderstanding that my namespace is WriteableBitmapEx.WinRT. But I tried all combinations like WriteableBitmapEx wb = new WriteableBitmapEx() and
WriteableBitmapEx.WinRT wbr = new WriteableBitmapEx.WinRT(), but with no luck.
When I send you that is all cut/paste Not my code. Only the above line is my code.
Have you tried to add this lib any of your test application?
Thank you very much for prompt reply.

Best regards
Agha Khan

My MainPage.xaml.cs start looks like this
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;
Next I would like to add Using “using WriteableBitmapEx.WinRT;”
I am using Microsoft visual studio 12. When you start typing Microsoft visual studio 12 will pop up a list where you could find appropriate list of word, but I could not find it and wrote it in anyway. When I compile I get the message
Error 1 The type or namespace name 'WriteableBitmapEx' could not be found (are you missing a using directive or an assembly reference?) C:\Apps\ImageTest\ImageTest\MainPage.xaml.cs 14 7 ImageTest
Because I have written (To test it) there or four application you can produce on your machine. I don't think you have any problem what so ever not to reproduce it.
Thank you prompt reply
Best regards

I created a new blank store application.
Clicked on Manage NuGet packages…
Search for WriteableBitmapEx and found and pressed install button.
Installed on my app and now I see the green check button.
Successfully installed 'WriteableBitmapEx 1.0.7.0'.
Added reference 'WriteableBitmapEx.WinRT' to project 'App2'
Added file 'packages.config'.
Added file 'packages.config' to project 'App2'
Successfully added 'WriteableBitmapEx 1.0.7.0' to App2.
Looked in my references and I see in my Object Browser it is there. I can see the path as well.
Assembly WriteableBitmapEx.WinRT
C:\Apps\App2\packages\WriteableBitmapEx.1.0.7.0\lib\NetCore45\WriteableBitmapEx.WinRT.dll

Goto to MainPage.xaml.cs and try to add using WriteableBitmapEx name space which VS 2012 unable to find it.
I am not sure how I can write code when I don’t have any reference to the library.

Thank you for prompt reply.

It will not let me add

My code look something like this

using Windows.UI.Xaml.Controls;
using System.Collections.ObjectModel;
using GameTools;
using Windows.UI.Xaml.Media.Imaging;
using System.Threading.Tasks;
using Windows.Storage.Streams;
using System.IO;
using System.Reflection;
using Windows.Storage;
using WriteableBitmapEx.WinRT;

There is RED line under using WriteableBitmapEx.WinRT;

I am unable to make any reference to that WriteableBitmapEx.
For example I want to create an image of such type I will not able to do so.
You may create a dummy project and try to add it. You will be able to see that in your reference but you will NOT able to use it.

Thank you very much for replying back.

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