.NET (Core and Framework) Discussion Boards

Please don't cross post.

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I'm having trouble with the Graphics class. I developed a class and gave it a method called Draw which takes a Graphics class as an input then draws itself to this. Fairly obvious stuff I thought.
In the parent forms onpaint call I loop through all the instances of my class calling the Draw method and passing it the eventArgs.Graphics object but for some reason it only displays the last class in the array. This is my current code. I even tried taking the contents of Draw(Graphics g) and putting it in the for loop but even this didnt help.What am I doing wrong? Any help would be greatly appreciated...

private void canvas_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{
int i;

e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
for(i=0;i<n;i++)
{
pArray[i].Draw(e.Graphics);
}

if(adding)
{
tempParticle.Draw(e.Graphics);
}
}

What kind of drawing are you doing in the class? Are you drawing the objects on top of each other?

Where do you set the value of the "n" variable?

Have you verified that you actually have all the objects in the array?

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Don't worry fixed it. It wasn't actually a problem with the Draw function, it was how I was assigning values to the array. I was using;

pArray[i] = tempParticle;

But with using;

pArray[i] = new Particle(...)

seems to work fine. Thanks anyway.

I see. So you populated the same object over and over, and ended up with an array full of references to the same object. Smile | :)

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Yep, pretty stupid I know D'Oh! | :doh:

, but then I have only been using C# for a few days.

Hi All,

Can anyone tell me how to replace the default "Property value is not valid" message that is displayed if an exception is thrown when changing a property on the PropertyGrid?

I am using the standard PropertyGrid in .NET 2.0 within my winforms app. The PropertyGrid is bound to my custom data objects. If an exception is thrown (eg, "This field must not be left empty"), the default "Property value is not valid" message box is displayed, with my exception message in the Details section.

It is a requirement of the app to display a more friendly message to the user. Is there any way I can replace the default dialog box?

Thanks

Nick

Hi,

I want to override the open button event in Word / Excel. I have created an addin. Now I need the index of Open button. Here is the code that i am using.

object oActiveExplorer oActiveExplorer=
applicationObject.GetType().InvokeMember("ActiveExplorer",BindingFlags.GetPr
operty,null,applicationObject,null);

CommandBars objCommandBars=
(CommandBars)oActiveExplorer.GetType().InvokeMember("CommandBars",BindingFla
gs.GetProperty,null,oActiveExplorer,null);

objToolBar = objCommandBars["File"];
CommandBarControl objCommandBarCtrl = objToolBar.Controls["FileOpen"];
CommandBarControl objCommandBarCtrl1 = objToolBar.Controls["Open"];

I have tried FileOpen and Open both but it is not correct. It is throwing an
exception.
Can anybody please help me.

Thanks
Anil Kumar Gupta

Anil Kumar Gupta

Hi dear friends.
I've ported a native (Unmanaged) C++ DLL to managed and used in .Net 2003.
Now I'm going to use this ported DLL it in .Net 2005. I change the compiler option /clr to /clr:oldSyntax and compile with no error.
But at run-time I get a exception when I want to use the DLL in a C# client.
The error message is:
MyDLL.dll is attempting managed execution inside OS loader lock. Do not attempt to run managed code inside a DLLMain...

Anyone can help me?

Not sure but this might help

http://www.pinvoke.net

If your DLL has any custom functions in DllMain then move them out ASAP. I ran into a lock problem on the DllMain of a COM object loaded under .NET; It's not quite the same problem but Microsoft told me to move all my code out of there.

Assert(this);

Hi,

I have a small doubt about Serialization in a scenaio.

When a WebPage is accessed, with its url (like http://xyz.aspx),
does any kind of serialization happen in the process of the accessing the webpage ?

I have read that objects will undergo serialization when accessed across boundaries. But not sure of this scenario. Confused | :confused:

Please clarify.

ThankYou,
Regards. Smile | :)

Please don't cross post.

No, you are requesting a web page, not an object.

Some serialization might occur in the process of creating the response, like putting values in ViewState, but the creating of the response itself is not based on serializing.

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-- modified at 8:09 Sunday 5th March, 2006

Hi,

Have a doubt with the functionality of 'string' type.
As String types are immutable we should not use string types, when large string manipulations are involved. This is understood. Roll eyes | :rolleyes:

But I assume StringBuilder as a class will use either of two .NET types,
char or string to store the data. Then how is StringBuilder mutable? Confused | :confused:

Please clarify how StringBuilder works internally.

ThankYou,
Regards. Smile | :)

Please don't cross post.

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Check out this

http://weblogs.asp.net/kdente/archive/2003/08/27/25579.aspx[^]

Vasudevan Deepak Kumar
Personal Web: http://www.lavanyadeepak.tk/
I Blog At:
http://www.dotnetjunkies.com/weblog/deepak/
http://deepakvasudevan.blogspot.com/
http://deepak.blogdrive.com/

I am looking for some Windows XP style Icons, but i find it really hard... Can i use the windows icons from the dll files in the System32 folder? (My progra is for non-comercial use) I found some icons in System.Drawing.SystemIcons, but they were not many. Can I use icons from SharpDevelop? (it's a open source project, right?) I've searched the source folders for Sharp Develop, but i can omly find a few of the Icons used in that program...

Is there any easy way?

Viktor Nilsson

The fact that noone answered you yesterday, probably means that none of the regulars here've done so. You might get an answer from an infrequent poster in the next few days, but your best bet would be to try asking somewhere else. Repeatedly posting the same question to the same place will not help you in the least.

-- modified at 12:42 Friday 3rd March, 2006

PS I'd suggest looking for and buying a book on DirectX. Look on Amazon.

Hi Everyone,

I was wondering if any one has implemented a smart client with active X objects inside of it?

For Example a Winform Smart Client with VLC ActiveX or MediaPlayer ActiveX objects in the application to view streams.

If you have, any tips or pointers or code fragments would be much appreciated.

Is it even Possible? How would the code confirm that all the ActiveX components are installed on the Machine?

Thanks in Advance;)

Regards

Mark

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnce30/html/activex30.asp[^]

Vasudevan Deepak Kumar
Personal Web: http://www.lavanyadeepak.tk/
I Blog At:
http://www.dotnetjunkies.com/weblog/deepak/
http://deepakvasudevan.blogspot.com/
http://deepak.blogdrive.com/

I am trying to figure out how to auto update a windows service from within the service itself. I cannot figure out how to restart a service inside that same service. Does anyone have any ideas for how to pull this off?

Thanks,
mike

You can't. Stopping the service stops your service code, so there is no way to call it's own Start. On top of that, you can't replace an .EXE that's already running. You'd have to do this from a seperate application, possibly from another service.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

hi im having a problem with my application..
basically i want to store values of my textboxes when i click on the add button..at the moment
what i have is when i load the application the below code is generated.....

Private Function LoadProject(ByVal ProjectID As Integer) As Boolean
' Simulate having retrieved project data
' from a database. Here, we'll use our
' Project and Task data structures to
' hold the data.
With theProject
.strProjNo = 1
.dateProjStart = DateTime.Today.AddDays(-100)
.dateProjTime = DateTime.Today.AddDays(100)
End With

theTasks.Add(New Task(0, "Go To Computer Graphics Lecture", _
DateTime.Today.AddDays(-17), _
DateTime.Today.AddDays(22), _
"make sure i print off lecture slides before lecture starts"))
theTasks.Add(New Task(1, "Go to Lab ", _
DateTime.Today.AddDays(-11), _
DateTime.Today.AddDays(19), _
"complete lab six and get it signed"))
theTasks.Add(New Task(2, "see tutor ", _
DateTime.Today.AddDays(-11), _
DateTime.Today.AddDays(19), _
"complete lab six and get it signed"))

Return True
End Function

.....and when i add a new task the new values are stored but only temporarly..i need it to store forever..

Private Sub btnAddTask_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAddTask.Click
' Unbind the Tasks array list from
' the dropdown ComboBox.
cboxTasks.DataSource = Nothing

' Add the task to the Tasks array list.
theTasks.Add(New Task(txtTaskNo.Text, txtTaskName.Text, _
txtTaskStart.Text, txtTimeStart.Text, _
txtTaskActual.Text))
With cboxTasks
.Items.Add( _
CType( _
theTasks(theTasks.Count - 1), Task).strTaskName)
.SelectedIndex = theTasks.Count - 1
End With
' Cleanup the form and re-select the old task.
AfterNewTaskCleanup(ixTaskPrev)
End Sub

.....i want to use xml as my datastorage but dnt no how to implement this..would be grateful if any 1 could help
p.s. i am using vb.net 2003 - smart device application for pocket pc

thanks

Environment:
----------------
Win XP SP2
VS 2005 Prof. Release and VS 2003 Prof. Release
Winword 2003

Topic:
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Managed assembly compiled with VS 2005 and prepared for COM Interop (registered for COM-Interop and visible to COM-Applications, e.g. Winword) could not be instantiated in Winword through VBA-Macro.

Statement in VBA is something like this:
Set comp = CreateObject(“OMNIplan.TestCOMInterop2”)

Or using a Reference (Component is visible in VBA-Object-Browser):

Dim comp as OMNIplan.TestCOMInterop2
Set comp = new OMNIplan.TestCOMInterop2

An Error is thrown in VBA:
Number -2147024894
Description: File- or Assemblyname ‘TestCOMInterop2’ or a Dependency not found.

After compiling the same project with VS 2003 Prof. the Component instanciates und runs without problem.

The assembly is a local resource and not copied to a network directory.
In my opinion it is therefore trusted and no code access security is in play.

I have checked the registry entry for Net-Version 1.1 and 2.0, they are identical accept the Runtime-, Assembly-Version and codebase.
First I had thought it could be a registration error. Therefore I have tried regasm …, the same result.

A deployment with a setup-project yields the same error.

I suppose the error is triggered by Net 2.0. Net 2.0 seems to operate with COM Interop in another way than Net 1.1. (In my opinion it is a loader-problem, the contructor is never reached under Net 2.0)

Perhaps it is bug or it is by design. But what has changed, if it is by design ?
I am baffled, can someone help.

Thanks a lot
gill

The code:
-------------
using System;
using System.Runtime.InteropServices;
using System.Text;
using System.Windows.Forms;
//

namespace OMNIplan
{
[Guid("17693BE6-BC93-45fd-BE80-A079C957B001")]
public interface _ITestCOMInterop2
{
[DispId(1)]
bool OpenDocument (object wordApp, object wordDoc,
object wizard, object settings,
object kindDoc);
}
//--- Events-Interface
[Guid("17693BE6-BC93-45fd-BE80-A079C957B002")]
[InterfaceType(ComInterfaceType.InterfaceIsIDispatch)]
public interface _ITestCOMInterop2Events
{
}
//
[Guid("17693BE6-BC93-45fd-BE80-A079C957B003")]
[ClassInterface(ClassInterfaceType.None)]
[ComSourceInterfaces(typeof(_ITestCOMInterop2Events))]
[ProgId("OMNIplan.TestCOMInterop2")]
public class TestCOMInterop2 : _ITestCOMInterop2
{
private string csCRLF = System.Environment.NewLine;
public TestCOMInterop2()
{
MessageBox.Show("TestCOMInterop2: Constructor");
}

public bool OpenDocument(object wordApp, object wordDoc,
object wizard, object settings,
object kindDoc)
{
try
{
if ((null != wordApp) && (null != wordDoc))
{
MessageBox.Show("TestCOMInterop2.OpenDocument OK");
return true;
}
MessageBox.Show("TestCOMInterop2.OpenDocument Failed");
}
catch (Exception ex)
{
MessageBox.Show("StartUp-Fehler: " + ex.Message);
throw ex;
}
return false;
}
}
}

You may have to tell Word to use the proper 1.1 framework by creating a manifest file for word. In your C:\Program Files\Microsoft Office\Office11 directory create the file: winword.exe.manifest with the following contents:

<configuration>
    <startup>
        <requiredRuntime imageVersion="v1.1.4322" version="v1.1.4322" />
        <supportedRuntime version="v1.1.4322" />
    </startup>
</configuration>

:..::. Douglas H. Troy ::..

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