In the first comment (by J.W.) to this question: Using ObjectDataSource and DataObjectTypeName, How Do You Handle Delete Methods With Just An Id Parameter?, it is said that using ObjectDataSource is a bad design. What is considered good design for well-architected ASP.NET applications?
View 1 RepliesI'm trying to get started with a simple audio application under .NET 3.5 (preferably in VB.NET, but will happily use C#). What I'd like to do is: Continuously record audio from (the default) Windows audio input device in 8-bits-per-sample PCM format For every N bytes captured, do some analysis on the raw audio (some RMS and/or SPL calculations -- basically what you'd need for a pretty VU bar graph thingy) If the audio fragment is found interesting after analysis, save it using a compressed file format (e.g. MP3)
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Which is the recommended approach for copying elements from one control to another? Currently I am using something like this:
For Each a As Control In control.Controls
Controls.Add(a)
Next
Should I stick to it, or should I change to use the ControlCollection.CopyTo method instead?
Just wondering what the recommended practice is for importing namespaces. Are you always better importing the namespace like the fisrt snippet of code, or are you better to type the full namespace inline with your code.
I like both methods; the first is tidier and takes less code, the second can identify exactly where your accessing some logic from which can provide some clarity when looking over the code. Just wondering if there are pros/cons for either or if this is just a personal preference, currently I use a combination but would like to keep consistant.
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I come from a C# background but am now working mostly with VB.Net. It seems to me that the above functions (and others - eg. UCase, LCase) etc. are carryovers from VB6 and before. Is the use of these functions frowned upon in VB.Net, or does it purely come down to personal preference?
View 4 RepliesMeanwhile waiting to further study I would like to imporve my programming skill in Visual Basic 2008, I would like to know if anybody knows where is the good link which is from Microsoft to learn and upgrade VB 2008. Mostly I am more interested in Application program specific in Engineering. anybody can show me the link, I am registered user of Microsoft Visual Studio 2008 and I am Microsoft Certified Professional.Website:
View 4 RepliesI was wondering if there is a recommended text for the creation of custom controls? I know a few years ago this book was out: Developing Microsoft .NET Controls with Microsoft Visual Basic .NET (Pro Developer)
It was published in 2003 I think. I have a great deal of experience in VB but not in actual control development, so I don't need a primer on classes and properties and the like. Wondering if this would still be worth it? I never dove into this part of VB and .NET before.
My program requires the reading and writing to a file that is shared among all users of a system. Currently I keep this file (an XML configuration file) in the directory that my application is installed to, which is C:Program FilesSomething by default. On Windows 7 (and probably XP too, but I haven't checked), regular users cannot write to this file. While I could probably set permissions as needed in my installation program, I'd rather find a more appropriate place for this file.All users need to read and write to it. Doing some Googling turns up C:ProgramData for Windows 7, but XP doesn't create this folder. Is there a common place on both platforms? Finally, is there an environment variable I can query for it?
View 2 RepliesThe basic setup is this: VB.NET application, using Windows.Forms, a parent form is shown and the user interacts with that. Now, I want to show a child form, modally, configure that form with data from the parent and have the user interact with that child form and then return information to the parent code.Here is one approach that I have used, but it is a bit awkward. Parent has this code:
Dim cf as Child_Form
Dim initdata(3) As Byte
' Set up initdata[code].....
I am working on a project that is used for key broadcasting. Don't worry nothing illegal, I'm making a multibox application for world of warcraft. However I am having trouble when it comes to launching and manipulating other applications from another.
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I was wondering does anyone know where i can find some good books and or articles covering the architecture and design of OOP applications. Also I need a book that explains how to structure an application as it relates to the data tier, business logic tier, and the front end.
View 6 RepliesTo write a effecient Active Directory library to ease the work of technicals who are responsible to create access models into the domain controller's Active Directory. This library must allow the following:Basic operations: Add, Modify, Delete, List entries;An entry may either be an organizational unit, group or user (no further need required as of now);I thought about having a class which would represent the domain with which we want to work with.
public class Domain {
public Domain(string root) {
Root = root;
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We have a small visual basic 6.0 application with an Access DB that we would like to migrate to modern code and architecture. I am not technical, but I am believe this would be something like a .net framework with a SQL Server DB.What I am wondering about, is there any way to covert this code to a modern language/architecture? If so, what is the easist modern language to migrate to?
View 7 Replieswhat is a disconnected architecture in dot net?Why are the dataSets a disconnected architectures in dot net?
View 15 RepliesWhen trying to determine the Architecture of an OS, I ran across IntPtr.From reading the documentation, I saw this: Quote:The IntPtr type is designed to be an integer whose size is platform-specific. That is, an instance of this type is expected to be 32-bits on 32-bit hardware and operating systems, and 64-bits on 64-bit hardware and operating systems.
Since the size of IntPtr is intended to be the size of the architecture, would it be feasible to test the size and determine the OS by that? Or is there a better way?
I was thinking there might also be a way via WMI, but I don't want to use that for compatibility reason.
Is there a way to programatically determine if the OS Architecture is 32-bit or 64 -bit?
View 5 RepliesI need to write an app that that will iterate over our database, and perform various anaylsis on each record. In order to do this (partially for the learning exercise in creating plugin support) I want to use a Plugin model.
Currently, I have a simple Interface in my main app, which plugins can Implement. My app then loads all DLL's in a folder looking for ones implementing the Interface.
As you can see in the pseudo-code below, I have to keep performing a loop through all loaded plugins calling the process methods.
Sub ProcessData()
For Each Record In MyDataSet
For Each Plugin In MyPluginCollection
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I am beginner in programming and developed an application of mine. Although, I am finished with the coding part, but I have to present my software architecture diagram. I am not a software engineer and so familiar with basics of software engineering, layering etc.I have used 1) .NET GDI Graphics in my application, 2) Text to Speech, 3) RichTextBox which retireives pictures etc. How do I proceed with the architecture diagram now?
View 1 RepliesI am working on a new domain model for an application that will have order processing for items built in (well, too keep it simple for this question anyway). I have a class "VendorItem" that represents items that can be ordered. Originally the "Order" class was going to have a list of VendorItems associated with it, but I have come across problems with it so far.
Let's say that the system has been creating orders for some time just fine. One day a user comes along and decides that a vendoritem has changed price or some other detail like packaging size. I wouldn't want the previous orders to be affected by such change. At first wash I was going to make a "OrderLine" class that is basically a copy of the "VendorItem" class, but that just feels (smells?) wrong in the OO sense. Is there a better way to refactor this so I don't have copies of classes and information in the domain model?
I have a large application that has always existed all in a single .NET project up until recently (200,000+ LOC). I'm finally getting to the point where I can fix this. I just started using the Entity Framework (4.1 using code first) and I believe this is a good time to start seperating my logic.
What I did is I separated my application into three subprojects:UI - Windows forms project Business - The POCO classes Data - Legacy data access code AND the DBContext class to connect my POCO classes to the database. I also have a Windows service project and will soon have a WCF project, but those concern me less.
The problem is that in this plan, the data layer depends on the business layer and vice versa causing a circular reference error. There is no way around this.So, my idea is to move my POCO classes into the data layer removing all business logic first (just keeping the database fields, basically). Then, I will inherit from those classes in the business layer adding back all the business rules. Then my data access layer will not rely on any other project, the business layer will rely just on the data access layer, and the interface layer will rely on both for now but eventually only on the business layer.
Does anyone see any problems with this, or a better way of doing things given my current circumstances?
Explain Singleton architecture of Remoting.
View 1 RepliesI need help in understanding this architecture. The person who wrote it is long gone and I'm stuck to figure it out. We are creating an object in some code from some random workflow in the web application (unimportant for my question). The object is being instantiated from a class found in a Designer.vb file. I couldn't initially see the file until I clicked the "show all files" in Solution Explorer in Visual Studio. There are 3 files linked together.. a *.xsd file, a *.Designer.vb file and a *.xsx file. The *.Designer.vb file looks to be auto-generated.
Goal:Get dbo.note.text from the dbo.note table column and place it in the dbo.exportnote.text column. I just don't understand how it's connecting to the database and getting the data from the dbo.note.text field. I want to make the query more specific (possibly put a where clause on it). But really I just want to understand how it's communicating with the database. Most of the code uses stored procedures. So I'm confused on the architecture. What would be really cool is if you can explain how this code was autogenerated. It appears that the *.xsd file is an XML file when I "View in Browser" from the Solution Explorer.Code to instantiate object of designer class:
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Using VB.NET 2008 I want to know what is 3 Tier Architecture for windows application? How to make a code for Inserting, Deleting, Updating in a database using 3 tier architecture.
View 5 RepliesI am in process of designing an architecture for an application. Following is the high level requirement.
1. The basic requirement is to convert a flat file into XML
2. The input flat file can have various formats, the delimiters, the data positions may vary.
3. The output XML format is predefined. There is a specification defined in a word format, which I think I need to define it as an XSL or XSD.
I am planning to follow some design pattern. Not decided yet. The architecture should be flexible to extend the input file formats and accommodate any changes in output specification.
Building a large application using 3 tier architecture in vb.net. Question: I am a vb.net developer. I have developed small and medium size application with 2 tier architecture. Now I am going to develop a large application. I have decided to develop that application using 3 tier architecture. So I studied about 3 tier. Now I know how what is 3 tier and how to develop a simple application. And also I studied about .Net Remoting and Web services. In my project, 7 modules are available. Each module has 3 layers. How can I manage in a Single Solution?
View 1 Replieshow to create a stable plugin architecture. Stable because I plan on opening up plugin creation to the public but I dont want a sloppy coded plugin to take down my whole application.
So I thought of using an AppDomain per plugin and I did a little seaching. But it seems that even using a temp AppDomain to load plugins and then unloading it once all assemblies have been inspected raises complexity allot and I was planing on using an AppDomain per plugin.
I feel the gained stability (if there is any at all) may be raising the complexity so much the app will never be done..
Is there another way to both create a stable application and at the same time making it extensible?
I cases where the host calls a defined function via say IPluginInterface I guess I can pack a whole lot of try catch blocks around that call but what if a plugin insisted of a timed routine that would run continously without being invoked from the host other that a starting call to StartPluginService or something like that?
If I include a plugin like that in the default AppDomain and it blows up I sure will blow my own foot off right?
I'm creating a rather large and complex application and was wondering if any of you had any recommendations for good books on application and project architecture. Multi-user - database - heavy interaction with windows api for shell extensions.Not the standard maintenance or reporting app I usually write!
View 2 RepliesHere's my current set-up:
Public Interface IDatabase
Function CreateParameter(name as String, dbType as <dbTypeEnumeration>)
End Interface
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The problem here is what exactly is dbTypeEnumeration. In the example above, it's simply a placeholder to what my problem is. Since we use both Oracle and SQL Server databases, the DbTypes are different depending on the database being used. For Oracle, the OracleClient object has its own OracleDbType enumeration with types. SQL Server also has its own enumeration.
My question is: is it possible to show those database-specific enumerations depending on which repository is injected into the DatabaseService constructor? If not, what's the best way to go about this? I want to separate the two databases, share logic, and allow for future development, ala the interface as a code contract for that development.
I do have some classes that implement their own serialization/deserialization but I'm doing all of these without implementing system.runtime.serialization.ISerializable. so my question is what exactly is the benefit of using system.runtime.serialization.ISerializable ? in what example situation will we need to implement system.runtime.serialization.ISerializable?
View 2 Replieswhat's a Class, and Object, a Method, a property and thins like that, but I have this doubt:Let's supppose I have a class "Laundry" this class has (just for this example) 3 propierties:
1.- laundryID
2.- Name
3.- Washers
Id and Name are "primitive" types or simple types (integer and string), but Washers, represent a list of object of type "Washer", that has 3 properties:
1.- washerID
2.- laundryID
3.- capacity
4.- brand
All of them (for this example) simple/primitives types (integer,string,string).So this my dilemma, it is correct to have a constructor like this (VB .net)
public sub new(ByVal laundryID as integer)
'' Here I'll query for the data of the Laundry on DB
'' After that I will query for every washer that belongs to this laundry
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And inside of that constructor query for all the washers that belongs to the laundry with id=laundryID parameter, and create objects of type "Washer" and add them to the list of Laundry ?I'm not sure If I explain myself, any comment I'll be really grateful, in less words, what's the correct approach (or good practices) to work with class/objects that has properties which are complex (other class/objects).I usually work with ADO.net probably ADO/LINQ/Entity solve this thins in an transparent way, but if they do it I don't really know it.
Note: I'm familiar with VB.net, C#, PHP, so if you prefer explain/help me using examples with its syntax, it's ok