.net - Reference Elements In Multiple Lists Together?
Apr 14, 2012
For my first post I've got a tricky question. I'm past walking through tutorials but not far enough to join the Open Source Community.this Question I'm trying to create a program that tracks combinations used in Alchemy Games (Generally on a mobile phone etc)I've got the following classes
Class Game contains properties for Elements and Combinations
Class Elements Inherits List(Of Element)
Class Combinations Inherits List(Of Combination)
Class Element
Class Combination
Combination contains Element 1 and Element 2 and List(Of Element) for the results My Question: Using Game.Elements how can I add a readonly property for combinations of that element.
[Code]...
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Dec 20, 2009
I have two lists of strings. One is a list of all students in a class and the other is a list of students in the class that completed an assignment. The two lists are part:whole. So we have two loops for copying elements and displaying them in a list box for only the students who did submit.
Dim f As Integer
f = 0
Dim h As Integer
h = 0
While (usersinclass.Count > f)
h = 0
While (usersidthatsubmittedassingments.Count > h)
[Code] .....
What I need is the remaining portion of the "usersinclass" list. (i.e. The students who did not submit). I tried an Else statement BUT with nested loops, every element is guaranteed not to match at least once, so I was getting elements that shouldn't be there. So, is there anyway to run the given lists against each other again to pull out the remaining students? (preferably with no repeats).
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Dec 27, 2009
I wish to read a web page that had various frames and div elements.To start with I would like to create a routine that justs lists all of those elements values and then display each element name and its value so I know what I have and how to reference it later on.I have been using the WebBrowser control and have managed to do a few basic things so far like go to a website and auto login.
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Sep 19, 2011
I want to create a website where it is possible to add dynamically "X" dropdown-lists (or other elements)These dropdown-lists should be shown on the website and furthermore there should be an other element be shown, that depends on the dropdown-list (for example: if the user chooses option "A" there is a checkbox, if the user chooses "B" there is a input field)
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Aug 15, 2011
what is the best way to load dropdown lists from reference/lookup tables for a desktop application? the application is layed out into 3 tiers. I've built up my entities.the front end has a form with 6 tabs. and one big save (another discussion :)Should I load them all when the form is initially loaded? Are there any caching mechanisms I could use?
it is vb.net app on a network drive that is accessed by several users.it's also worth noting that some reference tables may be updated. Via another form.
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Aug 16, 2011
One of my clients wants a set up multiple dropdown lists as a set of outbound links (yes, I cringed too, but he does have his reasons. there are 3 dropdowns, each one pertaining to its own group of links. When each dropdown has its SelectedIndexChanged, it then redirects based on the choice made. However, lets say I make a choice in the second dropdown. It goes to the proper link. If I then choose a link in the first dropdown, it goes to the proper link. Then if I select a link in the third dropdown, it will go to the link specified in the choice I made in the FIRST dropdown.
How can I code it so that it will always select the most recent selection?
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May 19, 2009
I have a small HR app.First step for user is to select the employee.I wanted a single combobox (autocomplete , drop-down), where the user can start typing either firstname lastname or nickname (these are 3 different fields in an SQL DB).At first, I would have the user check a checkbox near the combobox to select what they would be searching by (first, last, nick name), but then I thought - someone could probably help me with an example of not having to select which name type they are searching for, but just start typing and the combobox would autocomplete based on whichever name ?
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Jun 30, 2011
Say I have three lists containing multiple objects. Lets also assume they each contain the same number of items. [code]...
Now say I have a dataGridView that I have defined as having three columns. Is there a way to assign the contents of each of the lists to each of the three columns (e.g. column 1 = myList1, column 2 = myList2, etc.) without iterating through each of the lists? I know I could define a dataTable, create the columns, and iterate through each of the lists...then associate the dataTable to the dataGridView's dataSource. However, I don't want to iterate through the lists since in my real application, these lists are large and the iteration would take too long. I'm just wondering how to assign these lists to a column in a dataTable in bulk.
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Apr 6, 2012
I am working on a project for software engineering where we are trying to create a warehouse inventory system. I have created an inventory page where I can add/delete/search for an item as well as access invoices and reorder items... i am struggling on the delete item part. I have my design set up where there are four different lists on my page. One for name, one for serial number, one for RFID number and one for amount in stock. I want to be able to select an item by name and its information in serial number, rfid, and amount also select and have no idea how to go about this..I wanted to use four different lists because I need to be able to delete an item from the list and it remove just one from that stock and not the entire item unless there is only one of that item left in stock.
for my inventory page
Public Class InventoryDepartment
Private Sub InventoryDepartment_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code]....
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Jul 16, 2010
I have multiple combox boxes,
A B C
Combobox B has items Fruit, Veg, Dairy
Combobox C needs to contain 3 list and depending on what value is selected in Combo Box B.
For example,
If I select Veg in Combo Box B, I would like to have a drop down list containing "tomatoes, lettuce, onion,..........."
If I select Dairy in Combo Box B, I would like to have a drop down list containing "Milk, Cheese...................."
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Oct 16, 2011
I am struggling with the following - I try to add a value to a list, where the list is defined in a structure.
[Code]...
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Apr 28, 2010
I want to combine multiple lists of items into a single list, retaining the overall order requirements. i.e.:
1: A C E
2: D E
3: B A D
result: B A C D E
above, starting with list 1, we have ACE, we then know that D must come before E, and from list 3, we know that B must come before A, and D must come after B and A.If there are conflicting orderings, the first ordering should be used. i.e.
1: A C E
2: B D E
3: F D B
result: A C F B D E 3 conflicts with 2 (B D vs D B), therefore requirements for 2 will be used.
If ordering requirements mean an item must come before or after another, it doesn't matter if it comes immediately before or after, or at the start or end of the list, as long as overall ordering is maintained.
This is being developed using VB.Net, so a LINQy solution (or any .Net solution) would be nice - otherwise pointers for an approach would be good.
Edit: Edited to make example 2 make sense (a last minute change had made it invalid)
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Aug 25, 2010
I managed encrypting an xml document by encrypting an element and then replacing the element with the encrypted data. A shown in the sample code below. Public Shared Sub Encrypt(ByVal textReader As TextReader, ByVal textWriter As TextWriter, ByVal certificateName As String)
[Code]...
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Feb 11, 2011
i have set selection mode to multiExtended in vb.netSo i am able to select multiple elements but how to access those selected values/indices using SelectedItems property?
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Nov 16, 2011
I have the following tables
Public Class Tag
<Key()> _
Public Property TagID As Integer
[Code].....
I implemented the repository pattern.
Now i have a list of Tags which contain the right TagReferences, but the tags may not be deleted, it's the TagReferences.
Variabels = ReferenceValue,ReferenceID
IEnumerable(Of Tag) = TagRepository.GetMany(Function(el) el.Reference = ReferenceValue And el.TagReferences.Any(Function(bl) bl.ReferencedID.Equals(ReferenceID)))
How can i remove all the TagReferences which contain the ReferenceID in one line?
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Jun 10, 2009
I have this problem on reading multiple root elements from xml file to vb.net. how can i code it in order for my code to display all the root elements? here is my xml code
[Code]....
And also how do i do it in a way that I can select the firstname from second root element?
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Apr 24, 2011
I have imported a number of web elements that are called "reference values" from a website. These are added to the end of a website to navigate to a corresponding page. I am going to go to said website individually for each "reference value" and scrape code for use in a scheduling programming. How should i navigate to each of these websites when the url cannot be edited. The "reference values" are currently stored in an array but this does not seem like the correct method.
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Apr 1, 2011
I have two lists. One list is a list of names, the other list is a list of how many times each name is found in the first list noted in the database
so...
Nick
John
Jim
Jack
is the firs tlist
10
13
13
2
is the second list. Nick had 10, john 13 and so on.I want to sort the second list from large to small, but have the index for the first list still linked to the correct amount of calls.i do it this way so I can
for x = 0 to num_of_names
string = lst_name(x) & "-" & lst_count(x)
next x
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Feb 19, 2011
I have a gridview which can be filtered from one or more values in a querystring. That all works great: e.g. "?subject=Maths&authorName=Bond_James&type=Magazine" The values passed to the query string come from 3 drop down lists: Subject, Author, Type.What I'd like is when the user presses "Filter" it will take the selected values from the drop down lists and pass them to the querystring - it could be 1 value, 2, or all 3 (like above).
The drop down lists have an item called "All Subjects" / "All Author" / "All Type" each with a value of -1. The idea being that if the user leaves these items selected then the Filter button just ignores them.
Here is my code so far:
Protected Sub buttonFilterGo_Click(ByVal sender As Object, ByVal e As EventArgs) Handles buttonFilterGo.Click
Dim queryString As String
Dim selectedAuthorString As String = "author=" & dropAuthorList.SelectedItem.Value
[code]....
Also, one more thing. How do I get the drop down lists to have the filters selected when the page re loads?
EDIT: I changed the default values of the drop down lists to "" - this leaves the URL looking messy though ?author=&subject=&type= This works, is it the best way?
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Sep 17, 2010
I created a method and pass the element type, id, and any inner text that instantiates a new html element. The last statement: Me.Controls.Add(element) adds it to the end of the page, but I would like it to be inserted in a specific position (between 2 divs within a form). What I am describing is very similar to this post on SO here, although it was for javascript.
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Nov 24, 2009
I have a program that allows the user to add steps to a process (tabpages in a control). All tabpages are generated on the fly by duplicating a "template" tabpage and consequently have the same control names such as textboxStepDesc. Here is the hierarchy of the controls to get to textboxStepDesc.[code]...
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Jan 10, 2011
I have a block of code which is used to save some information to a text file. I need to use this a few different times in my app.I could just copy and paste it each time but that seems messy and is adding unnecessary code. I'm sure I can just save the code once and reference it when I need to. I think it's done in either a module or a class or something
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Apr 22, 2011
I am using KeyPressEventArgs to restrict several text boxes to numeric entries only. Rather than repeat the code, I thought I would make a "RestrictToNumeric" subroutine and call it from each "KeyPress" event. Like So:
Private Sub txt1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txt1.KeyPress
RestrictToNumeric()
End Sub
[code].....
The problem I am encountering is that the variable 'e' is used before it has been assigned a value, causing a null reference at runtime.
So I tried to add Dim e As System.Windows.Forms.KeyPressEventArgs As?to the RestrictToNumeric sub.I cannot figure out what I need to "Dim" it as...
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Jun 5, 2011
I have a one-dimensional array that has one number per element. I also have a variable number, var. I need to take the number of elements from the first array that equals the var and put it into a second array with commas between the numbers. I would also like to have a title element in the second array. [Code]
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May 20, 2010
I know how to check whether an item exists in a list using (MyList.Contains), But I do not know how to check the whole list. For example (use one button and one richtextbox):
[Code]...
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Aug 19, 2009
We have several VB.NET websites running internal applications. These sites are often modified with minor changes, and are maintained on the server as uncompiled code. I'm looking for the best way to maintain classes so that we can reference them from multiple websites.
Specifically, we're looking to put some common functions (error logging, common database calls, etc.) into a centralized location where they can be maintained separately from the sites and called as needed. And we'd prefer to have this on the server as uncompiled code, so it can be uploaded without precompiling. I feel like I'm missing something obvious, but what is the best way to set this up?
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Mar 13, 2009
I've got a bunch of DLL projects that I'm pulling into my application, each contains their own Settings.settings/app.config. When I compile the app and run for debugging, everything works just fine, but come deployment time I can't get my DLLs to read their own settings files.I've been doing some reading and it has become apparent that there's a couple of methods to getting each dll to read its own configuration - one is to dedicate a .dll.config to the library and the other is to embed the dll's configuration in the process.exe.config.I'm having significant issues trying to implement either and I wondered if anyone has any good docs on this - there appears to be a shortage on the Net.
I'd like a separate .dll.config for each of the libraries if possible, but in a pinch, getting each of my libraries to read their own section of the process.exe.config will he right direction because I'm so close to rolling this application out but this stumbling block is causing me a significant headache.Edit: When I merge the configuration files, I start getting TypeInitializer exceptions when I initialize objects withing my libraries. This is likely just me being retarded, but does someone have a working example of a merged config file and some basic demonstrative code for reading it from multiple assemblies?
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Jul 16, 2009
I have a button 'start quiz' which uses the dataset to fill the quiz form - ready for the user to start answering the questions.However, I am getting a 'null reference' at the point where the 'navigate records' on the quiz form is called. Have looked up that it means I have a variable that is null. But I have declared all the variables etc. Not sure what I'm doing wrong. I am very new to programming and I have spent quite a bit of time on this already.This is the code for the student user login:
Private Sub btnLoginStudent_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLoginStudent.Click
FrmQuiz.Show()
[code].....
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May 1, 2011
Is there a way to write a single function that will control validating the input to any textbox? How to pass control of it.
E.g.: My second try was to:
Dim CurrentTextBox As TextBox << Declare a global
Write a function that uses the global textbox and takes in 2 parameters, one determining the length it has to validate and the second telling it what to do once the input is verified
Public Sub ConfirmInput(length As Integer, which As Integer)
If (CurrentTextBox.TextLength < length) Then
CurrentTextBox.BackColor = vbRed
GoTo DONE
ElseIf (CurrentTextBox.TextLength > length) Then
CurrentTextBox.BackColor = vbRed
[Code] .....
My first try was to pass a textBox parameter to the ConfirmInput function but I believe that's the same problem as above.
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Apr 29, 2011
I am in vb.net and have a function that will be accessed by multiple threads. Everything inside the function uses local variables. However, each thread will pass in its own dataset by reference. From what I have read the local variables should be no problem, but I think the dataset coming in is a concern. How should I control access / execution of this function to make sure that it is thread safe?
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