I am trying to use the Microsoft web browser control on a form, however if you navigate to a site that takes a long time to load; the whole form UI locks up until everything is loaded. To combat this I am trying to run the web browser control seperate to everything else. I have created a small sample app using this tutorial: http://msdn.microsoft.com/en-us/library/ms171728.aspx
I have an error on the below function:
void SetNavigate(String* text)
{
if(this->axWebBrowser1->InvokeRequired)
{
SetNavigateDelegate* d = __gc new SetNavigateDelegate(this, &Form1::SetNavigate);
this->Invoke(d, __gc new Object[] { text });
}
else
{
this->axWebBrowser1->Navigate(text);
}
}
The line specifically is:
this->Invoke(d, __gc new Object[] { text });
error C2958: the left parenthesis '(' found at '\testbrowser\form1.h(56)' was not matched correctly
I had to sub delegate for __delegate, __gc new for gcnew and ^ for * so I am guessing this is another 2003 .NET being behind the times problem, does any one know the correct syntax I am looking for to stop the error appearing?
In 2003, I don't think you could use the {} array initializers inline yet. Try assigning the __gc new Object[] { text } to a named variable.
... and do anything you can to get away from writing managed c++ in vs2003. It's completely awful, and C++/CLI introduced in 2005 is a big improvement.
Related
I have a windows form that contains a user control (each defined in separate assemblies). Both the form and the user control call an extension method on BindingList<>. The extension method is defined in a 3rd assembly. Everything compiles & runs fine.
However, if I try to open the form in Visual Studio 2017 designer, I get an error:
To prevent possible data loss before loading the designer, the following errors must be resolved:
Method not found: 'System.ComponentModel.BindingList1 KamaTrenda.Utilities.Lists.ListUtilities.AddReset(System.ComponentModel.BindingList1,
System.Collections.Generic.IEnumerable`1)'.
Call stack:
at System.ComponentModel.ReflectPropertyDescriptor.SetValue(Object
component, Object value) at
Microsoft.VisualStudio.Shell.Design.VsTargetFrameworkPropertyDescriptor.SetValue(Object
component, Object value) at
System.ComponentModel.Design.Serialization.CodeDomSerializerBase.DeserializePropertyAssignStatement(IDesignerSerializationManager
manager, CodeAssignStatement statement,
CodePropertyReferenceExpression propertyReferenceEx, Boolean
reportError) at
System.ComponentModel.Design.Serialization.CodeDomSerializerBase.DeserializeAssignStatement(IDesignerSerializationManager
manager, CodeAssignStatement statement) at
System.ComponentModel.Design.Serialization.CodeDomSerializerBase.DeserializeStatement(IDesignerSerializationManager
manager, CodeStatement statement)
Commenting out the content of the setter of this property allows for opening the form in the designer:
public IList<IPosition> PositionsToDisplay
{
get { return myPositionsToDisplay.Select(x => x.Position).ToList(); }
set { myPositionsToDisplay.AddReset(value.Select(x => new PositionAdapter(x))); }
}
myPositionsToDisplay:
private readonly BindingList<PositionAdapter> myPositionsToDisplay = new SortableBindingList<PositionAdapter>();
And AddReset:
public static class ListUtilities
{
public static BindingList<T> AddReset<T>(this BindingList<T> list, IEnumerable<T> toAdd)
{
list.RaiseListChangedEvents = false;
foreach (T item in toAdd)
list.Add(item);
list.RaiseListChangedEvents = true;
list.ResetBindings();
return list; // for chaining
}
}
I have tried adding
[Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
to the definition of PositionsToDisplay, and it made no difference.
I tried rebuilding, manually deleting the contents obj & bin directories for all 3 projects, as well as the contents of AppData\Local\Microsoft\VisualStudio\15.0_6d397e1a\ProjectAssemblies, closing all open documents in VS 2017, closing the solution, and restarting Visual Studio, and it made no difference.
The .resx file of neither the form, nor the control, refer to the property.
The Designer.cs for the form had some code that seemed to be causing the issue:
this.control.PositionsToDisplay = ((System.Collections.Generic.IList<IPosition>)(resources.GetObject("control.PositionsToDisplay")));
Deleting this (presumably after adding DesignerSerializationVisibility.Hidden, so that it does not get re-generated) seemed to solve the issue.
First of all I want to apologize for the English.
I'am develop windows 8.1 store app. On C++/CX language. My solution contains several projects. One of projects has the 'Windows Runtime Component' type, and perform geocoding and reverse geocoding.
For a geocoding I use 'Bing Maps SDK for Windows 8.1 Store apps'(link).
Here's my algorithm:
void addressByLocation(double latitude, double longitude)
{
ResourceLoader^ loader = ref new ResourceLoader();
String^ credentials = loader->GetString("BingMapCredentials");
Location^ location = ref new Location(latitude, longitude);
ReverseGeocodeRequestOptions^ requestOptions = ref new ReverseGeocodeRequestOptions(location);
Map^ map = ref new Map();
map->Credentials = credentials;
SearchManager^ searchManager = map->SearchManager;
task<LocationDataResponse^> reverseGeocodeTask(searchManager->ReverseGeocodeAsync(requestOptions));
reverseGeocodeTask.then([=](LocationDataResponse^ response)
{
if (!response->HasError)
{
//
}
});
}
I've got the problem in this line:
Map^ map = ref new Map();
It always generates an exception with text:
"Platform::DisconnectedException ^ at memory location 0x0396DF80.
HRESULT:0x80010108 The object invoked has disconnected from its clients.
WinRT information: The object invoked has disconnected from its clients."
But I noticed something weird. If add project to the solution which contains UI(xaml), my code in this project works perfectly fine, without any exceptions.
Can somebody specify an error to me? Or give the explanation for this strange behavior.
There is probably other methods to perform geocoding for windows 8.1 store apps, which I don't know yet.
Thanks.
Currently, I'm working on compiling old .cpp classes under C++ Builder XE. Apart from many troubles, there is one which I have completely no idea how to solve.
My code:
String txt = "<Not so long sql query>";
int licz = some_function(txt, dzeFDS); //1
//assigning licz to somewhere
txt = "<much longer query>";
licz = some_function(txt, budFDS); //2
Problem is that during second call of some_function program is stopped and i have this alert:
First chance exception at $75A1C42D. Exception class EDatabaseError with message 'budFDS: Type mismatch for field 'Function', expecting: String actual: WideString'. Process Call.exe (1896)
It's strange form be, bacause first call of some_function works fine, but this second one (with arguments with the same type) doesn't.
some_function code:
int __fastcall some_function(String txt, TIBDataSet *firDS)
{
firDS->Close();
firDS->SelectSQL->Text = txt;
firDS->Open(); //during debugging, exception occurs in this line
int count = 0;
while(!firDS->Eof)
{ count++;
firDS->Next();
}
return count;
}
Any ideas what why it happens?
Thanks in advance
There is much pain in your future.
Anyway, the problem you're having is with the database connection. There's a field in your database called "Function" that holds a string. This field came across as a String with the ancient database driver that this program originally used. Your shiny, new database driver is telling VCL to expect such things as Unicode, and VCL doesn't like to shove such things into plain Strings, so it expects you to have a WideString ready in which to shove it.
Fortunately, there are ways of beating VCL into submission. What you want to do, since you surely don't want to rewrite half the application by changing TIBDataSet, is to tell the connection not to bother with Unicode. In order to do this, you have to set up the TSQLConnection object with UseUnicode=false, which I hope (I have no way of testing VCL code anymore) should look something like this:
connection->Params->Add("UseUnicode=false");
Where connection is the TSQLConnection object. I think you have to do this before connecting to the database.
If that doesn't work, see if you can configure the database driver to not use Unicode.
Problem solved - this one field Function has other type in C++ Builder design view - it was TStringField, and rest fields has TIBStringField...
I'm trying to write an 'autoexp.dat'-based visualizer for a string type. I've scaled-back my ambitions to attempting to write a visualizer for a really simple test type that contains a null-terminated string field:
namespace thizz { namespace izz {
class MyType {
const char* _ptr;
public:
MyType(const char* ptr) : _ptr(ptr) {}
};
}
}
This is my stab at a visualiser, but it has no effect on how Visual Studio (2010) displays an instance of this type:
thizz::izz::MyType
{
preview ([$e._ptr,s])
}
(That's going at the top of the [Visualizers] section in C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\Packages\Debugger\autoexp.dat).
Watching an instance of this type:
thizz::izz::MyType t("testing testing");
Just displays
t | {_ptr=0x0f56a6fc "testing testing" } | thizz::izz::MyType
in the Watch window.
To get an even more versatile viewer try changing to use this:
thizz::izz::MyType {
preview ( #( [$e._ptr,s] ) )
stringview ( #( [$e._ptr,sb] ) )
}
this will also give the magnifying glass icon which will open a larger text view window in the case that you have a longer string. It'll also give you the option of rendering as HTML or XML.
Note that as well as the format of the file being sensitive to whitespace, I've also found that you can't use a colon in the string otherwise it generates parse errors.
The debugger visualisers are incredibly powerful, though the syntax can be quite bewildering. As general advice I would suggest creating some entries first in the [AutoExpand] section to summarise the data types that you are most interested in, and then if you have custom containers then copy and adapt the examples for vector, list, etc, which will give you the largest return for the investment in your time.
I can't give a categorical reason why my original 'code' in autoexp.dat was not working, but I found that the same code worked when all the whitespace was removed.
I then tried re-adding whitespace and found that keeping the initial open brace on the first line was necessary to keep the definition working.
I'm looking for a simple example code for C++\IronPython integration, i.e. embedding python code inside a C++, or better yet, Visual C++ program.
The example code should include: how to share objects between the languages, how to call functions\methods back and forth etc...
Also, an explicit setup procedure would help too. (How to include the Python runtime dll in Visual Studio etc...)
I've found a nice example for C#\IronPython here, but couldn't find C++\IronPython example code.
UPDATE - I've written a more generic example (plus a link to a zip file containing the entire VS2008 project) as entry on my blog here.
Sorry, I am so late to the game, but here is how I have integrated IronPython into a C++/cli app in Visual Studio 2008 - .net 3.5. (actually mixed mode app with C/C++)
I write add-ons for a map making applicaiton written in Assembly. The API is exposed so that C/C++ add-ons can be written. I mix C/C++ with C++/cli. Some of the elements from this example are from the API (such as XPCALL and CmdEnd() - please just ignore them)
///////////////////////////////////////////////////////////////////////
void XPCALL PythonCmd2(int Result, int Result1, int Result2)
{
if(Result==X_OK)
{
try
{
String^ filename = gcnew String(txtFileName);
String^ path = Assembly::GetExecutingAssembly()->Location;
ScriptEngine^ engine = Python::CreateEngine();
ScriptScope^ scope = engine->CreateScope();
ScriptSource^ source = engine->CreateScriptSourceFromFile(String::Concat(Path::GetDirectoryName(path), "\\scripts\\", filename + ".py"));
scope->SetVariable("DrawingList", DynamicHelpers::GetPythonTypeFromType(AddIn::DrawingList::typeid));
scope->SetVariable("DrawingElement", DynamicHelpers::GetPythonTypeFromType(AddIn::DrawingElement::typeid));
scope->SetVariable("DrawingPath", DynamicHelpers::GetPythonTypeFromType(AddIn::DrawingPath::typeid));
scope->SetVariable("Node", DynamicHelpers::GetPythonTypeFromType(AddIn::Node::typeid));
source->Execute(scope);
}
catch(Exception ^e)
{
Console::WriteLine(e->ToString());
CmdEnd();
}
}
else
{
CmdEnd();
}
}
///////////////////////////////////////////////////////////////////////////////
As you can see, I expose to IronPython some objects (DrawingList, DrawingElement, DrawingPath & Node). These objects are C++/cli objects that I created to expose "things" to IronPython.
When the C++/cli source->Execute(scope) line is called, the only python line
to run is the DrawingList.RequestData.
RequestData takes a delegate and a data type.
When the C++/cli code is done, it calls the delegate pointing to the
function "diamond"
In the function diamond it retrieves the requested data with the call to
DrawingList.RequestedValue() The call to DrawingList.AddElement(dp) adds the
new element to the Applications visual Database.
And lastly the call to DrawingList.EndCommand() tells the FastCAD engine to
clean up and end the running of the plugin.
import clr
def diamond(Result1, Result2, Result3):
if(Result1 == 0):
dp = DrawingPath()
dp.drawingStuff.EntityColor = 2
dp.drawingStuff.SecondEntityColor = 2
n = DrawingList.RequestedValue()
dp.Nodes.Add(Node(n.X-50,n.Y+25))
dp.Nodes.Add(Node(n.X-25,n.Y+50))
dp.Nodes.Add(Node(n.X+25,n.Y+50))
dp.Nodes.Add(Node(n.X+50,n.Y+25))
dp.Nodes.Add(Node(n.X,n.Y-40))
DrawingList.AddElement(dp)
DrawingList.EndCommand()
DrawingList.RequestData(diamond, DrawingList.RequestType.PointType)
I hope this is what you were looking for.
If you don't need .NET functionality, you could rely on embedding Python instead of IronPython. See Python's documentation on Embedding Python in Another Application for more info and an example. If you don't mind being dependent on BOOST, you could try out its Python integration library.