VS 2008 Will Not Need To Update Each Component Variable Of Products List When Components List Changes

Sep 21, 2010

I think (?) this is about object design, and perhaps about structural and/or creational patterns. But a bit hard to say when I only know a couple of patterns yet.[code]But... what if we INSTEAD want each Product instance only to (in some way) refer to one instance of a specific list of Components. So we wan't to save the products list to one file, and the components list to another file. Then would I build the objects the same way, or different? So let's then say we have now Class B as below. [code]

1. Will not need to update each component variable of the products list when the components list changes.

2. If the Product object shall be shown in a DataGridView, for editing properties, it seems easier to implement the selection of the component property.

Is this wrong approach? Is it suitable in some cases, and if so, when? Are there other solutions I perhaps am not aware of that would be appropriate? Is this about structural design patterns? and if so, can the alternatives above be catagorized to some pattern type? I don't really know exactly what I'm looking for.. But I think probably I'm looking to understand whether the object design will be determined by the way the objects are saved.. And if i shall save the objects by serializing to file, vs saving to a database, would I create the business objects differently?

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Jun 30, 2009

I'm basically brand new to LINQ. I've seen some examples that allow me to strong type objects using LINQ but I don't really understand them because they're in C#, which I guess lets you do different things with LINQ(I think?). [Code] I just want to get a list of all the products from the XML doc and put them into a Generics list.

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Jun 19, 2011

I'm trying to make the following snippet work in VB6 but it's one error after the other. can anyone make heads or tails of this?

Basically i'm after a little proggy which will store the names of a couple of products, calculate product code (first three and last three characters of product name) produce a list of products stcked with their initial stock levels, allow info on products be search for, allow the products to be purchased.

[code]...

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Jul 31, 2008

I've got 2 seperated programs.

One is a program where you can select a product and select how many of them you want. Then the total price wil be displayedin a label. And the list of selected products will be saved in a .txt file.

The second program is an Edit program. The user can edit his selected products. Here he can change the total of a product.So if he had selected 1, he can change it to three or something. When the user clicks the button Save. The changes will besaved in the same .txt file and the total price will also be changed and displayed in program one.

Program one is compleet.Program two has problems and here i need your help:- the user can't make a change in the numbers, seems that the textbox is read-only or something. How to solve?- Then when i click save, the changed must be saved in the .txt ( i can't test this yet because no changes can't be made)- the total new price must be showed in program 1 (i think i programmed this well, but can you take a look)

Here is a part of my code of program 1:

CODE:

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Dim x = GetType(List(Of )) 'valid statement
Dim list As New List(Of String)

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VS 2008 Student List Views - List Boxes And Data Fro Access DB Tables

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This is what I'm sure will be the first of many noob-ish questions from yours truly... I'm studying as a mature student for a Computing Degree (encompassing web design, hardware, programming and systems analysis). The programming seems to be my weak spot this year. I enjoyed C++ last year, doing basic console applications, but progamming visually with VB in Visual Studio 2008 I'm struggling!

[Code].....

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VS 2008 - Fetch List Of Directoies From 1 Special Ftp Server Wich Does Not Support LIST Command

Jan 27, 2011

I have a small problem i'm trying to fetch list of directoies from 1 special ftp server wich does not support LIST command i was try this code and it works for all ftp server i have try exept this special one :

'' Get the object used to communicate with the server.
'Dim request As FtpWebRequest = DirectCast(WebRequest.Create("ftp://" & txtFTPhost.Text), FtpWebRequest)

[code]...

I'm getting error 502 which means command is not supported and app crashed. I would just simple said leave it but i have try normal ftp clients like FlashFXp and it works just fine (i can see error in the log but it just pass it and show direcoties)

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VS 2008 Declare A List(of T) (or List(of <anonymous Type>))?

Jan 7, 2010

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May 5, 2010

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how to upload an email list to the listbox component by using browse button?

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Public Class Form1
Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

[code].....

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[code]....

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[code]...

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Public Sub EventUpdate(ByVal EventMsg As String)
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[code].....

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Such as:

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I have this

Public strDBData As New List(Of SearchDatabases)
Public Structure SearchDatabases
Public strName as String

[code].....

If you need to know what i'm doing this it it:I'm parsing a webpage that lists information such as; Name, Site URL, How many members etc.And thats fine, but i want to put the names in a listbox, and then when the user clicks a name in the listbox it displays the other data about that name such as the site URL and how many members they have.This is easy to do but i have made my listbox sorted so the names display alphabetically, so then my strDBData index's don't line up correctly, to fix this i need to sort the

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I'm working on a project for a client (he wanted it in VB.NET so I dont have a choice) and have hit a wall. I have a Product class, and a List(Of Product) that I'm using to store products in while a new order is being built. The problem I'm running into is updating the Quantity value of a product if it's found in the list (instead of adding the product again).

[Code]...

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I'm working with Windows Forms - VB.NET.Here's what I have:

A ListView with checkboxes set to True
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A database table with similar fields as the ListView

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C# - Design Question - DataSet Or List - Update Changes

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How do I track changes only in the second GridView. There could be 1000's of zipcode in the second GridView. Do I just remove and re-insert the list for that location evertime the user click save? I was thinking of using a DataSet, add DataRows and then update, however I am not using a DataAdapter to load my dataset, so there is no way for me to use DataAdapter.Update(ds). I am using the SQLHelper.ExecuteDataset(parms)

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SQL Server - Update Rows Based On A List

Jun 8, 2011

I'm working with Windows Forms - VB.NET.

Here's what I have:

A ListView with checkboxes set to True A Button (triggers the update) A database table with similar fields as the ListView

What I want to happen:

when the user clicks the Button, all items on the ListView with checkbox checked will be updated.

My progress: I've already collected the ID of the checked items and stored them in an array. I'll be using this to update the database table.

The problem: I don't know how to put them in the SqlCommand.Parameters Also, I don't know the update command for such scenario (where in/exist (@parameters))

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