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Dear
I have a question about how to use attribute or element. Recently when I desige the XML data map, I am confusing that when should I attribute , when
should I use element. For example, I have "Login" root element. Inside the Login, I want to put username and password. So, Should I make an child
element "username" and "password"? Or should I put attribute "username" and "password" under the root element "Login"??
Well, it seems not much different between two. But in many case, I always think about Should I use this field for attribute or for child element? Is
there any general rules can help me to choose between attribute and element?
such as if the data size is large, we should use........etc
How does it affect the application performance?
regards
Davis
Davis Leung
Analyst Programmer
Fedex
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Hi,
I've been trying to raise an event in my Web Control which can b trapped by my client app and a certain action performed based on it.
But every time i run the page an error message saying "System.ArgumentNullException: An exception of type System.ArgumentNullException was thrown"
I am unable to figure out the reason for this error.
Cud someone please help me out with it..
Thanq
Rgds
Jayant Menon
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I have made a Jave Applet that can draw vector graph. I use it in HTML page
at Internet. I know that another way is I can developed a OCX control to do
this task. But the later's size is larger than Java Applet. Here has .NET,
extra choice. I want know if I write the control by C#(It is a .NET control),
what advantage I can get and what I lost?
Thank you.
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I have a IIS/ASP/SQL/COM web project which I inherited at work that uses a lot of "questionable" coding practices. I want to find better tools, programming practices, debugging methods, project management, etc. when dealing with IIS/ASP/SQL/COM. So I figured I'd see what .NET has to offer. However, I don't know where to start.
Can anyone point me in the direction of some good tutorials on getting started from the ground up with IIS/ASP/SQL/COM the .NET way?
thx
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Hi everyone,
I've got the following situation:
Multiple modules (Web Controls in fact) reside on the same web page. Each has some input fields that need to be checked before submitting. I tried to use those nice input validator controls of ASP.net as they can handle it.
However:
As I only can have one form-tag (that runs server-side) on a page, and nested forms dont work either, it occurs that I cannot sumit (or call a module's member function) without having filled out the fields of *both* modules. This isn't the expected behaviour, as the the user should be able to use one module independently of the other.
How can I trick the validators into that?
-Chris
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Well I finally managed to get VS .NET Beta 2 installed (not everyone has a gig free of space!  ) and I eagerly loaded everything up only to discover the following error.
It appears when ever I attempt to view the Design tab in a project (i.e. Form1.vb [Design])
The error is:
An error occured while loading the document. Fix the error, and then try loading the document again. The error message follows:
File or assembly name EnvDTE, or one of its dependencies, was not found.
I searched MSDN and online for this error but could find very little reference to it.
Any help would be greatly appreciated, thank you.
regards,
Paul Watson
Cape Town, South Africa
e: paulmwatson@email.com
w: vergen.org
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Just for everyones info if you ever get that error I got above, do a fresh re-install. After I nuked my PC and then re-installed VS.Net Beta 2 things worked great. Just ensure you have plenty of free space, especially on your C: drive.
regards,
Paul Watson
Cape Town, South Africa
e: paulmwatson@email.com
w: vergen.org
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I am looking for users who would like you have there own website portal based on .net framework. The portal currently uses ASP.NET and SQL Server 2000. Email me and I will Setup A Portal or store for you for free. I am currently accepting as many as my bandwidth can handle.
Meltucker1@hotmail.com
Example portal can be found here…
http://www.ibuyspy.com/portal/DesktopDefault.aspx
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I am just starting to learn .net and ordered c# the the .net platfrom by Andrew Troelsen. This looks like a good book to learn about .net and c# sharp. I have read the 1st chapter which is an intro and part of the 2nd about c#. The book is based on beta 2 and is 970 pages. Check out
http://www.apress.com/catalog/toc/1893115593/ for more info. But here is the table of contents:
Chapter 1: The Philosophy of .NET
Chapter 2: C# language Fundamentals
Chapter 3: Object Oriented Programming
Chapter 4: Interfaces and Collections
Chapter 5: Advanced C# Class Construction Techniques
Chapter 6: Assemblies, Threads and AppDomains
Chapter 7: Reflection and Attributes
Chapter 8: Building a Better Window (intro to Windows Forms)
Chapter 9: A Better Painting Framework (GDI+)
Chapter 10: Programming with Windows Forms Controls
Chapter 11: Input, Output and Object Serialization
Chapter 12: Interacting with Existing Systems
Chapter 13: Data Access with ADO.NET
Chapter 14: Web Development and ASP.NET
Chapter 15: Building (and Understanding) Web Services
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I know I shouldn't have done this, but I did, and I wonder if it is a bug that anyone has heard about:
I created a new Web App. In the design view, I dragged an SqlAdapter and connection onto my aspx page, rather than creating a middle-tier component. VS added the appropriate member variables and added code to InitializeComponent() to set up the Sql objects. I got my app working fine.
After a while, my virtual memory usage creeps up and I'm swapping like a mad dog, so I save my app, exit VS, and restart the system. When I come back, the Sql objects no longer appear in design view, and the initialization code is gone from InitializeComponent(). However, the member variables are still there!
I fixed everthing, and got the app working. I save, exit and restart a number of times and everything is OK. Then, a day or so later, same problem!
Has anyone seen this?
Plus, when the Sql objects disappeared, another strange thing happened. Even thought I had code in my aspx.cs module for event handlers for my DataGrid, the event handlers weren't called. When I looked at the VS property sheet, my handlers weren't listed. Simply adding them into the property sheet fixed the problem, and they were called. Why is that? Shouldn't simply having them in the aspx.cs module make them work?
Thanks for any clues.
J. Reilly
VT EE '89
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Are they COM objects? Or something else?
Thankx.
PS The use of emoticons should be outlawed and punishable by death.
J. Reilly
VT EE '89
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Quick answer here but I believe that they are the same thing. Windows relies on COM (now COM+) and as one sage remarked "Microsofts ace is COM, everything else they do is just fluff for their COM empire".
Naturally the word Components gets bandied about a lot. From my experience when they refer to Components in the VS.NET help and articles they simply are talking about the custom controls and components that come with VS.NET. You can naturally create your own Components for VS.NET and in most cases they will be COM+.
> PS The use of emoticons should be outlawed and punishable by death.
              ![Rose | [Rose]](https://www.codeproject.com/script/Forums/Images/rose.gif)
simply showing my reactions to your statement on emoticons
regards,
Paul Watson
Bluegrass
Cape Town, South Africa
"We would accomplish many more things if we did not think of them as impossible."
- Chretien Malesherbes
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Is it possible to install VS .Net Beta 2 and VS6 on the same system.
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Theoretically that shouldn't be a problem. Although there is no garanty that installing VS.NET Beta 2 will not affect your other apps so dramatically that not only VS6 but also your OS stops working properly.
At the moment VS.NET Beta 2 is in a very unstable stage.
Cheers, Quique Halleridge
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I ran VS6 and VS.Net Beta 1 on my laptop with WIN2000 Prof for about three months without problems. I recently uninstalled the Beta 1, and installed Beta 2 Framework SDK, and have not noticed any problems with the rest of my applications.
You may need to be careful when you run the compilers to be sure you are pointing to the correct path, and that the correct CL is being invoked.
Gaul
Gaulles Technologies, Inc
http://www.gaulles.com
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Yes but don't compile any production code with VB6 as some of the components will be pulled from .Net and installed on the client machine.
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hi
i want to connect the database of foxpro to vb.net through ado.net connection . also i am new user of vb so i dont know the vb6. so plz anybody have the solution of my problem if yes then plz write it and i will be very greateful to u for this answer.
thank awaiting for the reply
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Does anyone know if and how to include DX8 in a C# program. I'm sure you can. Also know if .net apps will work with upcoming X-Box
Thanx
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I have two Dropdown listboxs and one grid
I select something from the first list and the second list will have new selections and after I select something from the second list the Data in the datagrid will change, all this without moveing from one page to another, it all has to happen in one page DYNAMIC!!
What is the simplest way on doing it?
DHTML,ASP.NET,ASP or ActiveX
I need a sample and some source code PLEASE!!
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Is there any Class available in .Net Framework which can list all the files,Dirctories,Drives of a local harddisk ?
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System.IO.Directories is the class you are looking for.
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System.IO.Directory rather
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