Hi, yesterday I tried all day to update my article, I always get the same error. Can someone help me with this?

My article has been edited and now it contains a smaller mistake in the title. When I try to edit it the site says: Article Submission Wizard An error occurred while loading the article. Please refresh the page to retry. The article is this: Martix-style rain in C# with WPF[^] Where the title should say "Matrix" instead of "Martix" :)

On a first try using

writeableBitmap.Lock();
unsafe {
Marshal.Copy(my_arrb_8bit
, 0
, writeableBitmap.BackBuffer
, img_w * img_h);
}

// Specify the area of the bitmap that changed.
writeableBitmap.AddDirtyRect(new Int32Rect(0, 0, img_w, img_h));

// Release the back buffer and make it available for display.
writeableBitmap.Unlock();

seems to start working not yet at 30fps but almost there...thank you very much :)

Hello, i'm moving my actual winform based application to WPF. My application acquire 1500x1500 8bit depth images at 30 frame per second. In winform i was used to BitBlt my images to a panel handle and that work fine. In wpf i tried two ways:

// on every frame:
int stride = img_w * ((PixelFormats.Gray8.BitsPerPixel + 7) / 8);
bmpSource = BitmapSource.Create(img_w, img_h, 96, 96, PixelFormats.Gray8, null, my_arrb_8bit, stride);

this.Image1.Source = bmpSource;

but this is too slow...then i try

// on every frame:
int max = PixelFormats.Rgb24.BitsPerPixel;
uint count = (uint)(img_w * img_h * PixelFormats.Rgb24.BitsPerPixel / 8);
IntPtr section = CreateFileMapping(new IntPtr(-1), IntPtr.Zero, FileMapProtection.PageReadWrite, 0, count, null);
IntPtr map = MapViewOfFile(section, FileMapAccess.FileMapAllAccess, 0, 0, (UIntPtr)count);

System.Runtime.InteropServices.Marshal.Copy(my_arrb_24bit, 0, map, (int)count);
my_ibs = System.Windows.Interop.Imaging.CreateBitmapSourceFromMemorySection(
section,
(int)img_w,
(int)img_h,
PixelFormats.Rgb24,
(int)(img_w * PixelFormats.Rgb24.BitsPerPixel / 8), 0) as System.Windows.Interop.InteropBitmap;
this.Image1.Source = my_ibs;

this is faster than the first solution, but still i can't manage to reach 30fps....am i doing something wrong? any suggestion?

Hello, i'm moving my actual winform based application to WPF. My application acquire 1500x1500 8bit depth images at 30 frame per second. In winform i was used to BitBlt my images to a panel handle and that work fine. In wpf i tried two ways:

// on every frame:
int stride = img_w * ((PixelFormats.Gray8.BitsPerPixel + 7) / 8);
bmpSource = BitmapSource.Create(img_w, img_h, 96, 96, PixelFormats.Gray8, null, my_arrb_8bit, stride);

this.Image1.Source = bmpSource;

but this is too slow...then i try

// on every frame:
int max = PixelFormats.Rgb24.BitsPerPixel;
uint count = (uint)(img_w * img_h * PixelFormats.Rgb24.BitsPerPixel / 8);
IntPtr section = CreateFileMapping(new IntPtr(-1), IntPtr.Zero, FileMapProtection.PageReadWrite, 0, count, null);
IntPtr map = MapViewOfFile(section, FileMapAccess.FileMapAllAccess, 0, 0, (UIntPtr)count);

System.Runtime.InteropServices.Marshal.Copy(my_arrb_24bit, 0, map, (int)count);
my_ibs = System.Windows.Interop.Imaging.CreateBitmapSourceFromMemorySection(
section,
(int)img_w,
(int)img_h,
PixelFormats.Rgb24,
(int)(img_w * PixelFormats.Rgb24.BitsPerPixel / 8), 0) as System.Windows.Interop.InteropBitmap;
this.Image1.Source = my_ibs;

this is faster than the first solution, but still i can't manage to reach 30fps....am i doing something wrong? any suggestion?

ok i get it if you wanna know

value class IconInfo
{
public:
bool fIcon;
Int32 xHotspot;
Int32 yHotspot;
IntPtr hbmMask;
IntPtr hbmColor;
};

hello i'm trying to convert this piece of code from vb

Private Structure IconInfo
Public fIcon As Boolean
Public xHotspot As Int32
Public yHotspot As Int32
Public hbmMask As IntPtr
Public hbmColor As IntPtr
End Structure

<DllImport("user32.dll", EntryPoint:="CreateIconIndirect")> \_
Private Shared Function CreateIconIndirect(ByVal iconInfo As IntPtr) As IntPtr
End Function

<DllImport("user32.dll", CharSet:=CharSet.Auto)> \_
Public Shared Function DestroyIcon(ByVal handle As IntPtr) As Boolean
End Function

<DllImport("gdi32.dll")> \_
Public Shared Function DeleteObject(ByVal hObject As IntPtr) As Boolean
End Function

Public Function CreateCursor(ByVal bmp As Bitmap) As Cursor

    'Setup the Cursors IconInfo
    Dim tmp As New IconInfo
    tmp.xHotspot = \_gHotSpotPt.X
    tmp.yHotspot = \_gHotSpotPt.Y
    tmp.fIcon = False
    If \_gBlackBitBack Then
        tmp.hbmMask = bmp.GetHbitmap(Color.FromArgb(0, 0, 0, 0))
        tmp.hbmColor = bmp.GetHbitmap(Color.FromArgb(0, 0, 0, 0))
    Else
        tmp.hbmMask = bmp.GetHbitmap()
        tmp.hbmColor = bmp.GetHbitmap()
    End If

    'Create the Pointer for the Cursor Icon
    Dim pnt As IntPtr = Marshal.AllocHGlobal(Marshal.SizeOf(tmp))
    Marshal.StructureToPtr(tmp, pnt, True)
    Dim curPtr As IntPtr = CreateIconIndirect(pnt)

    'Save the image of the cursor with the \_gBlackBitBack effect
    'Not really needed for normal use.
    'I use it to create a screen shot with the gCursor included
    \_gCursorImage = Icon.FromHandle(curPtr).ToBitmap

    'Clean Up
    DestroyIcon(pnt)
    DeleteObject(tmp.hbmMask)
    DeleteObject(tmp.hbmColor)

    Return New Cursor(curPtr)
End Function

By now i traslate the all thing into:

public struct IconInfo
{
bool fIcon;
int xHotspot;
int yHotspot;
System::IntPtr hbmMask;
System::IntPtr hbmColor;
};

\[System::Runtime::InteropServices::DllImport("user32.dll, EntryPoint:=CreateIconIndirect")\]
System::IntPtr CreateIconIndirect(System::IntPtr iconInfo);

\[System::Runtime::InteropServices::DllImport("user32.dll, CharSet:=CharSet.Auto")\]
bool  DestroyIcon(System::IntPtr handle);

\[System::Runtime::InteropServices::DllImport("gdi32.dll")\]
bool DeleteObject(System::IntPtr handl);

System::Windows::Forms::Cursor ^CreateCurs

Explanation:

//wrong code
for(int j =0;j<this->s_dataGridView->Rows->Count;j++)
{
    this->s_dataGridView->Rows->RemoveAt(j);
}

//right code
// the rows goes from 0 to count-1
for(int j =0;j<this->s_dataGridView->Rows->Count-1;j++)
{
    this->s_dataGridView->Rows->RemoveAt(j);
}

and again

//wrong code
int j = this->s_dataGridView->RowCount;
while(j<=0)
{
   this->s_dataGridView->Rows->RemoveAt(j);
   rowCount --;
}
// right code
int j = this->s_dataGridView->RowCount-1;
while(j>=0)
{
   this->s_dataGridView->Rows->RemoveAt(j);
   j--;
}

some line of code of what you have done till now would help

modified on Friday, June 25, 2010 7:48 AM

the problem come from this -> "Login form -> open form1 form , and form1.h has the others #include files just like "test1.h" and ect." the include file must be correct utilized cause they can lead to your problem. in an ideal world you should include the .h files like in a tree:

          super\_main.h
           /         \\
      main1.h       main2.h
     /      \\

submain1_1.h submain1_2.h

where each .h have one .cpp with the operational code -- or -- there are some workaround like #ifndef #define ....code.... #endif to make life easier when implementing .h :)

it was just the name i used...so no reason for that

so....here we are: in form 1 substitute:private: System::Void testbutton_click(System::Object^ sender, System::EventArgs^ e) { testlabel->Text = "new form open"; Form2^ popup = gcnew Form2(); popup->ShowDialog(); } private: void raised_event (System::Object^ sender, System::EventArgs^ e) { /* Get the text from the textbox on the other form */ Form2^ popup = gcnew Form2(); testlabel->Text = popup->textbox->Text; } }; // susbstitute with..... private: Form2^ popup; void testbutton_click(System::Object^ sender, System::EventArgs^ e) { testlabel->Text = "new form open"; popup = gcnew Form2(); popup->button_send->Click += gcnew EventHandler(this, &Form1::raised_event); popup->ShowDialog(); } void raised_event (System::Object^ sender, System::EventArgs^ e) { testlabel->Text = popup->textbox->Text; }
i'm pretty sure you'll understand my changes. Maybe it would be better to use delegates....i'll write you some code for that // form 1///////////////////////////////////////////////////////// #pragma once #include "Form2.h" namespace delete1 { using namespace System; using namespace System::ComponentModel; using namespace System::Collections; using namespace System::Windows::Forms; using namespace System::Data; using namespace System::Drawing; public ref class Form1 : public System::Windows::Forms::Form { public: Form1(void) { InitializeComponent(); } protected: ~Form1() { if (components) { delete components; } } private: void testbutton_click(System::Object^ sender, System::EventArgs^ e) { testlabel->Text = "new form open"; Form2^ popup = gcnew Form2(); popup->myPersonalDelegateCl += gcnew Form2::myPersonalDelegate(this,&Form1::raised_from_delegate); popup->ShowDialog(); } void raised_from_delegate (String ^txt) { this->testlabel->Text=txt; } System::Windows::Forms::Button^ testbutton; System::Windows::Forms::Label^ testlabel; System::ComponentModel::Container ^components; #pragma region Windows Form Designer generated code void InitializeComponent(void) { this->testbutton = (gcnew System::Windows::Forms::Button()); this->testlabel = (gcnew System::Windows::Forms::Label()); this->SuspendLayout(); /* Testbutton */ this->te

the code you write is actually....working....so...if you write here or post as attachment the full code i will check what's wrong :)

this is msdn link[^] what are you looknig for, you can also google for "visual studio resource resx" ...if you are using "visual c++" or "visual c#" this is made so easy by using the designer

what the "ListView_DeleteColumn" function do? it's not a .net function...so write the code here if you want an answer :doh:

the structure (SCS3Over ) in c# dll is public? if it's public you can directly use it in visual c++ without having to redeclare it...so your visual c code:

//struct SCS3OverVwPg 
//{ 
// __int32 iOvrPgNo;       
// char sOvrPgTitle[30]; //OverView Page Title 
//}; 
  
void CToolTab::SendOverview() 
   {  
     //SCS3OverVwPg *pOverVw = 0; 
     //pOverVw = new SCS3OverVwPg;     
     Globals1::SCS3Over tmp; //use the correct namespace to go to SCS3Over
     tmp.iOvrPgNo=1;
     tmp.sOvrPgTitle="ciao";
     Globals1::gwtoolbar->SetTree(tmp); 
   }

google for this....and you'll find the solution [DllImport("user32.dll")] extern IntPtr FindWindow(String^ lpClassName, String^ lpWindowName); once you have the pointer to the data's form, you have several way to get the data

is there some reletion between the first form and the second form.... do the first form generate the second form or the second form generate the first?

try with the following: System::Convert::ToInt32 System::Convert::ToDouble System::Convert::To......

loaak at http://msdn.microsoft.com/en-us/library/system.windows.forms.sendkeys.aspx[^] also...you black boxes give you the possibilities only to use the "control+c" key or they provide also some public function to do the operations? if they give also public function you can always try to static_cast or dynamic_cast the Control pointer...if this is your case this is far better than trigger the ctr+c command