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I've been playing with .NET quite a bit in my spare time just writing WinForm apps, playing with the new controls, classes and of course, learning C#. I started thinking about real world uses for .NET and my first instinct was how it might work at my company. Here's what I'm up against.
I have a ton of 16-bit C++ MFC code here. I was hired in to get this code moved over to 32-bit and begin enhancing on the 32-bit side. We also have a "webmaster" here who's using Java to take bits and pieces and "webify" it.
What I'm curious about is that the application we have is a fairly standard client/server application with an Informix database on the back end. We have a bunch of clients with special conditions that need to be accounted for as well.
I guess my question is, is it going to be possible for me to take a client/server (in the old sense of the word) and make it something where I can have a Win32 (WinForm) application and use the same DLLs or modules and also build a web interface? How do I go about doing something like this. I'm thinking about putting together a proof of concept application together for my boss.
Thanks.
http://www.ratebeer.com
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Hi,
Your DLLs will be able to be used in both Winforms and Webforms. The efficiency of the implementation depends on the how you use the DLLs. If you want to talk about it some more, I would need to know a little more about the application (client and server side) architecture.
Cheers!
Colin
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I think .NET will be great for IT departments, consulting firms, service providers, and the likes. From their press releases, I also think that MS develop .NET with these people in mind.
However, I haven't heard their views on .NET for commercial application development.
Personally, I don't think .NET haven't much to offer on this area except improve time-to-market. However, .NET runtime will surely penalize apps runtime performance.
Any views on this one?
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.net runtime is the child of Pcode. Pcode is semi-compiled thingy whatsit (dam sh*t I've forgotten the word for it). Any way this Pcode can in many cercumstances run faster or be smaller than its local machine specific counterpart.
I bet you want me to explain how don't you?
Darn it man, its been a million years since I read this in Program Now (do you remember that one, sigh, memories).
Its something to do with the way Pcode can share functions at a level very close but not quite at machine level. Oh bugrit I can't remember. It just is ok!?
We do it for the joy of seeing the users struggle.
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I know how to change a control's border style -- as in BorderStyle.FixedSingle or BorderStyle.Fixed3D, this is just a property of a control that can be set. How do I actually change the color of a BorderStyle.FixedSingle border though? The default black, but I want light gray borders like the caption and tool window borders in Visual Studio.NET
Thanks.
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I have an application that allows users to, using the mouse, click and hold a control and move it to another location on the form.
How do I draw that un-filled drag rectangle that shows the user that they are moving something around. I need to be able to draw this drag rectangle anywhere on the screen (on the app, over other controls, on the desktop) not just on the application itself.
Your help is appreciated.
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The class 'System.ControlPaint' has some methods with the name 'Reversible' in them that draw onto the screen. If you use FillReversibleRectangle then you could draw four of them to get the drag rectangle you are looking for. There is only one problem with this though, you have to give a Color and so it will be a solid border around your control and not the stipled effect you want.
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Write a program that inputs ONE 2-digit number (%d) ,
output the number by separating the number into its individual digits by a new line.
eg. input 76 output 7
6
eg. input 99 output 9
9
how to write ?
thx~~
RR
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int inputnr;
int ten;
int one;
ten = (int) inputnr / 10;
one = inputnr % 10;
cout << ten << "\n" << one;
think this should work... at least i hope so..
bernhard....
"Politicians and diapers have one thing in common. They should both be changed regularly and for the same reason."
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How to get disk label, the name of disk map, cd name.?
How to get name of My computer icon on desktop?
Thank
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I am building a mdi windows application. but when i create a child window, such as "New File" , i wants to dock the child window. but it do not work.
below is the related source:
private void File_NewDoc_Click(object sender, System.EventArgs e)
{
//TextView is a Form which contains a RichEditBox control.
this.frmTextView = new TextView ();
this.frmTextView .MdiParent = this;
this.frmTextView .Dock = System.Windows.Forms.DockStyle.Bottom;
this.frmTextView .Show ();
}
What's Matter?
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I suspect the problem is that a MDI child Form is not going to allow itself to be docked within an MDI parent. It just doesnt make much sense.
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If i set the Windows to Tool windows or dialog, do it work? i realy don't know which properaties of windows or dialogs are related to the dock action.
The Internet Give a Chance to Learn. I Do!
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Does anyone know what happened to UnmanagedType.LPVoid in beta 2. After spending many hours/frustration trying to figure it out I concluded its not in beta 2. Though it was in an earlier version, an example on CP even uses it. The only reference I found on MSDN was here
Hmmm, I wonder if it was replaced by something else or something...
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Try using IntPtr instead.
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I tried using IntPtr using several tricks none of which works. What I am trying to do is call a win32 api, using C#. I did what I wanted easily in managed C++ with the features I wanted, though I thought it would be better if I can get it in the same project and hence use C# rather than using an external dll.
Lets take an example NetServerEnum, which I adapted from here to use beta2:
--------------
[DllImport("netapi32.dll")]
unsafe private static extern uint NetServerEnum(
[MarshalAs(UnmanagedType.LPWStr)] string ServerName,
uint level,
//In my test I try to change this next line
//with something appropriate, though no LPVoid
//I tried some of the other types with no
//success
[MarshalAs(UnmanagedType.LPVoid)]uint* bufptr, uint prefmaxlen,
ref uint entriesread,
ref uint totalentries,
uint servertype,
[MarshalAs(UnmanagedType.LPWStr)] string domain,
uint resume_handle);
--------------
At the end of the day I get one of two results depending how I approach it.
A.It compiles, but the function returns error 87 which stands for 'The parameter is incorrect.'
B.An exception
--------------
Unhandled Exception: System.Runtime.InteropServices.MarshalDirectiveException: C
annot marshal parameter #3: Invalid managed/unmanaged type combination pointers must be paired with LPVoid).
--------------
I made a managed C++ component to do what I want(didn't take more than a couple of minutes), but was trying to compact things by not using managed C++ if I don't have. And since something similar was done in beta1 I was thinking it should be easily done in beta2, though I am not sure what I am overlooking here.
Thanks.
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I think you'd want to define the bufptr parameter as:
ref IntPtr bufptr
With your current code, you're just passing a pointer, rather than a reference to a pointer. Once you get the IntPtr out, it's fairly easy to cast it to whatever pointer type you want.
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Thanks.
Thats the way I tried it, though something you said made me think about the size and hence error 87. I tried a couple of pointer tricks and it worked! Again thanks for the tip on the change from LPVoid to IntPtr(If it was indeed a change  )
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how do i make it so if im making like an output box, like the old Debug window, where i can print stuff like, "Opening File...", "Transfering Data..." and stuff like that, how do i enter to a new line...like hitting the 'ENTER' key...i know in VB6.0 it is vbclrf or wuteva but wut is it in c#?
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ooh ooh i know i know!!, oh wait, im answering my own question
you declare to chars with hexadecimal code:
char charreturn = '\u000D' //0 = Zero
char linefeed = '\u000A' //0 = Zero
textBox1.Text = textBox1.Text + charreturn + linefeed + "Your statement!"
hehe, sometimes i make myself laugh, other time i hit myself cause im stupid!;P
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In my application, it needs a dialog of folder selection. Are there a predefined dialog in Windows 2000?
Sorry, I am a beginner of Windows Application Programmer.
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opendialog opnfile=new opendialog();
opnfile.filte=....
opnfile.text=....(sorry,I don't remember,please youself look for it in MSDN)
if (opnfile.0k=...)
{
string filename=opnfile.filename;
}
hope this helps!
regards
Iverson
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In C#, i used a BrowseforPath() function in Shell32.dll.
The Internet Give a Chance to Learn. I Do!
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I’m trying to mimic the functionality of the Visual Studio.NET Start Page. I’d like to be able to create hyperlinks to recently used projects and create buttons that will invoke an OpenFileDialog or other dialogs. Right now, I have an Internet Explorer ActiveX control in a Windows Form. Somehow, I need to call member functions of the parent form from within an HTML document (or at least it seems to me that that’s what I need to do).
I was looking in MSDN and I found the IDocHostUIHandler interface that has a GetExternal function. GetExternal returns an IDispatch pointer which I think (hope) will allow an HTML document to interface to the parent form via IDispatch’s Invoke method.
It looks like this may provide the functionality I’m looking for, but I can only find how to implement it in C++. Does anybody know how to do this in C# (or any .NET language)?
Or, if you’ve done something like this in C++, let me know if I’m on the right track here.
Thanks.
Stephen
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Hi people !,
help please !! how can you facilitate Web Service to Windows Forms communication ? (or at the least, what's it called ?)
what i mean is, suppose you invoke a Web Service function that should update a TextBox on separate Windows Forms application . they are both on the same machine.
thanks ! any help would be greatly appreciated !!!!
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