[FlexChart] Invalid Cast Exception

Posted by: jak on 2 May 2024, 7:15 am EST

jak

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Posted 2 May 2024, 7:15 am EST

Hi,

For testing I have a simple form with a FlexChart. I receive the following unhandled exception.

System.InvalidCastException: Specified cast is not valid.
  at C1.Util.DX.HResult.ThrowException () [0x0000b] in <6c47f93b00ff472aa889e8dbffd89277>:0 
  at C1.Util.DX.HResult.CheckError () [0x00009] in <6c47f93b00ff472aa889e8dbffd89277>:0 
  at C1.Util.DX.DXGI.SwapChain.GetBuffer (System.Int32 buffer, System.Guid riid) [0x0002b] in <6c47f93b00ff472aa889e8dbffd89277>:0 
  at #5ln.#4ln.#Vbg (System.IntPtr #frd) [0x00191] in <f1fad3d92ac849f9b32d5b05d62b4269>:0 
  at #5ln.#4ln.#3ln (System.Object #ci, System.EventArgs #di) [0x00019] in <f1fad3d92ac849f9b32d5b05d62b4269>:0 
  at System.Windows.Forms.Control.OnHandleCreated (System.EventArgs e) [0x00277] in <f8ddac92d8e04f8abe177f57ba0387df>:0 
  at System.Windows.Forms.Control.WmCreate (System.Windows.Forms.Message& m) [0x0002c] in <f8ddac92d8e04f8abe177f57ba0387df>:0 
  at System.Windows.Forms.Control.WndProc (System.Windows.Forms.Message& m) [0x004ce] in <f8ddac92d8e04f8abe177f57ba0387df>:0 
  at System.Windows.Forms.Control+ControlNativeWindow.OnMessage (System.Windows.Forms.Message& m) [0x00001] in <f8ddac92d8e04f8abe177f57ba0387df>:0 
  at System.Windows.Forms.Control+ControlNativeWindow.WndProc (System.Windows.Forms.Message& m) [0x000b3] in <f8ddac92d8e04f8abe177f57ba0387df>:0 
  at System.Windows.Forms.NativeWindow.Callback (System.Windows.Forms.Message& m) [0x00025] in <f8ddac92d8e04f8abe177f57ba0387df>:0

I am guessing that the #5ln, #4ln and #Vbg are the parameters being passed to the C1.Util.DX.DXGI.SwapChain.GetBuffer() function. I am also guessing that the C1…GetBuffer() is then calling the windows .GetBuffer() function.

I think the windows .GetBuffer() is throwing up the exception.

What is flexChart trying to do when it causes the exception?

Is there a way to debug/show the value of the parameters?

Thank you,

kartik.dua
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Posted 2 May 2024, 7:37 pm EST

Hi,

We created a sample project using the latest version (4.8.20233.643) of FlexChart, and unfortunately, we could not reproduce the error on our end. The sample project is attached for your reference.

If you have a different implementation or specific data that is causing the issue, please share a stripped-down version of your project or update the attached project, so we can investigate further on this and assist you as best as possible.

Attachment: FlexChartDemo.zip

Thanks, and Kind Regards,

Kartik
jak
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Posted 21 May 2024, 9:56 am EST - Updated 22 May 2024, 3:41 am EST
Kartik,

I have been given the task to explore if the C1 controls will run in wine on Linux. My host computer is running Ubuntu 22.04 LTS (jammy-jelly), the latest stable version of wine (9.0) and wine-mono. All of the C1 controls that we use run except FlexChart.

I receive the following Unhandled Exception when running the provided FlexChartDemo example.

************** Exception Text ************** System.InvalidCastException: Specified cast is not valid. at C1.Util.DX.HResult.a () [0x0000b] in <d961e0fb3f28459999877003373f0ebb>:0 at C1.Util.DX.HResult.CheckError () [0x00009] in <d961e0fb3f28459999877003373f0ebb>:0 at C1.Util.DX.DXGI.SwapChain.GetBuffer (System.Int32 buffer, System.Guid riid) [0x0002b] in <d961e0fb3f28459999877003373f0ebb>:0 at bpa.a (System.IntPtr A_0) [0x0017c] in <5299db0be2504182b1e081f851d40fca>:0 at bpa.a (System.Object A_0, System.EventArgs A_1) [0x00019] in <5299db0be2504182b1e081f851d40fca>:0 at System.Windows.Forms.Control.OnHandleCreated (System.EventArgs e) [0x00277] in <ef3dd1b1af11490e89408e0d9c28d1f0>:0

I have narrowed the problem down to something inside the C1.FlexChart.4.8.dll

Here are the steps to reproduce the exception.

start with fresh install of Ubuntu 22.04 LTS

installing wine

reference: https://wiki.winehq.org/Ubuntu

prepare the host

sudo dpkg --add-architecture i386

add repository

sudo mkdir -pm755 /etc/apt/keyrings sudo wget -O /etc/apt/keyrings/winehq-archive.key https://dl.winehq.org/wine-builds/winehq.key sudo wget -NP /etc/apt/sources.list.d/ https://dl.winehq.org/wine-builds/ubuntu/dists/jammy/winehq-jammy.sources

install wine - stable branch - at the time of this message, the latest wine stable version was 9.0

sudo apt-get update sudo apt install --install-recommends winehq-stable

create a 32-bit wine prefix script

mkdir ~/bin cat > ~/bin/wine32_prefix << "EOF" # this creates a 32-bit wine prefix export WINEPREFIX=~/.wine32 export WINEARCH=win32 EOF chmod +x ~/bin/wine32_prefix

run the script to setup the wine environment

source ~/bin/wine32_prefix

run your first wine program

# winecfg is installed as part of --install-recommends winecfg

Wine Mono Installer dialog will be displayed

click [Install]

wine Configuration dialog will be displayed

choose Windows Version: Windows 7

click OK to exit winecfg

you have created a new hidden directory ‘~/.wine32’ located in your home directory. To list the hidden directory type ‘ls -a’

cd ls -a

you are done with installing and setting up wine

run the FlexChartDemo.exe

create a flextemp folder on the Ubuntu computer

mkdir ~/flextemp

build the demo on your windows computer and copy to the flextemp directory -OR- unzip the attached FlexChart.zip into the flextemp folder

set the wine prefix environment - this is required once each time you open a new terminal window

source ~/bin/wine32_prefix

run the FlexChartDemo.exe in wine

cd ~/flextemp wine FlexChartDemo.exe

The exception dialog is displayed - click on [Details] to see the exception text.

Note: if you click on [continue] then the FlexChart is displayed and the chart acts normal.

I attached the executable I built from the provided code.

Please advise if you can duplicate the problem.

Sincerly,

MesciusFlexChartDemoBuilt.zip
kartik.dua
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Posted 21 May 2024, 9:14 pm EST

Hi,

Thanks a lot for sharing all the details. We are setting up an environment similar to yours for testing the behavior you mentioned, and will get back to you with the updates as soon as possible.

We appreciate your patience.

Best Regards,

Kartik

jak

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Posted 22 May 2024, 5:39 am EST

Kartik,

First thank you so much making an attempt to setup the environment to see my problem.

I have edited the above post’s syntax to make the instructions easier to follow. Let me know if you have trouble with any of the steps and I will try to give more detail about what the step is doing.

When you are ready, wine-mono has some optional command lines to help with debugging

# these command lines may provide you with more clues
WINE_MONO_TRACE=E:System.InvalidCastException wine FlexChartDemo.exe
WINE_MONO_TRACE=M:C1.Util.DX.DXGI.SwapChain:GetBuffer wine FlexChartDemo.exe
WINE_MONO_TRACE=M:C1.Util.DX.HResult:CheckError wine FlexChartDemo.exe
WINE_MONO_TRACE=M:C1.Util.DX.HResult:a wine FlexChartDemo.exe
# you can combine them
WINE_MONO_TRACE=M:C1.Util.DX.DXGI.SwapChain:GetBuffer,M:C1.Util.DX.HResult:CheckError,M:C1.Util.DX.HResult:a wine FlexChartDemo.exe

Thank you,

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