Circular Referencing - Validated Three Lists
Oct 5, 2010
I'm working on creating my own sudoku solver to learn vb.net. I decided to have an element class which represents a single square in the puzzle. That element then has references to three lists which can be validated (no duplicate numbers). The three lists then would be its corresponding row/column/subGrid. Each list then holds a reference to 9 elements. Thus in my design an element has a reference to a list, which then holds a reference to that same element. Now vb.net will allow me to do this so I don't think it is the same issue that I saw when searching for solutions to circular referencing. However, I still wonder whether or not this is bad design.
View 2 Replies
ADVERTISEMENT
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
View 3 Replies
Feb 28, 2011
I need to load a form call formok after the user is validated by the Computername that is stored on a table. I have all the code for that just need the part to load the form call formok. I have the code running in a module called modUserName
Function fOSUserName() As String
' Returns the network login name
Dim stDocName As String
[code].....
View 3 Replies
Jul 28, 2009
Is there anyway to check if a Control has been validated yet?I have some code that I want to run when the Selected of a TabControl fires off.The thing is, that I have TabPages added to the TabControl at the beginning of runtime, which then triggers the Selected event before the control is completely existent, which means the Sub I have that also happens to reference the control during that event errors out because there is technically not an instance of the control completely finished building so it says I don't have a correct reference set to that object.So basically, I want to be able to check in the Sub if the control has been Validated, or maybe even created or whatever is going on.
View 9 Replies
Aug 8, 2010
I have a datagridview and the cell gets validated in the validating event;
[Code]...
View 3 Replies
Jun 24, 2009
(image removed)
After publishing and running the setup, i get the above msgbox.. how do i fix this validation, to where i can publish my app without having it validated?
View 6 Replies
Apr 11, 2011
I'm trying to use the events Validating and Validated on a ToolStripTextbox.
Private Sub txtMenuOwnIP_Validated(ByVal sender As Object, ByVal e As System.EventArgs) Handles txtMenuOwnIP.Validated
MyIP = txtMenuOwnIP.Text
StatusLabelIP.Text = MyIP
End Sub
[code].....
Neither code is firing.The CausesValidatition of the txtMenuOwnIP is set to true.I can enter stuff into that Textbox and leave it using the Mouse or simply piush Enter, but the posted code won't get fired (used a Breakpoint in both subs). There are no other event routines for this command used.
View 5 Replies
Oct 28, 2009
I have a custom text box component (inherits from system.windows.forms.textbox) that I created in vb.net (2005) that handles the input of numeric data. It works well.
I would like to suppress the validating and validated events from firing if the number hasn't changed. If a user is tabbing through the form and tabs from the text box, the validating/validated events are fired.
I was thinking that the text box could cache the value and compare it to what is listed in the text property. If they are different, then I would want the validating/validate events to fire. If they are the same, nothing is fired.
I can't seem to figure out how to suppress the event. I have tried overriding the OnValidating event. That didn't work.
Update:
Here is the custom text box class. The idea is that I want to cache the value of the text box on the validate event. Once the value is cached, the next time the user tabs through the box, the validating event will check to see if the _Cache is different from the .Text. If so that is when I would like to raise the validating event to the parent form (as well as the validated event). If the _cache is the same, then I don't want to raise the event to the form. Essentially the text box will work the same as a regular text box except that the validating and validated method are only raised to the form when the text has changed.
Public Class CustomTextBox
#Region "Class Level Variables"
Private _FirstClickCompleted As Boolean = False 'used to indicate that all of the text should be highlighted when the user box is clicked - only when the control has had focus shifted to it
[Code]....
View 2 Replies
May 19, 2011
I have a problem in that I have five text boxes pertaining to a customer/client, where there is a txtbox for each: Name; Address; City: State; Zipcode. Of course all the txtboxes are "" at initialization. I also have 2 combo boxes and a 2D array for prices which I have finally been able to understand the array logic. I have also been able to do my necessary calculations for.
My problem. The customer information is first to be validated as all being strings and not empty. The combo boxes I was able to get to tie to my 2 dimentional array and get good output and calculations for a finished product. I am just having problems with the error messages. Also I don't want summary totals unless the data is valid. In other words, the user must enter a complete address and make decisions about the two combo boxes, both of which are needed to use the price array. I will change the comboBoxes to represent dress sizes,"S" "M" "L" and "XL" and the other combobox to describe colorRedSatin or colorBlackBroadcloth with a two dollar difference in price between them. 'That would be similar enough to the problem I need to solve.
Basically I do not want any numbers to appear for price of the dress or addons to the dress unless all validation is complete. I do understand how the radio objects work for discounts and check boxes for accumulating accessories. The program should not give any totals untill the user has input all customer information and made decisions about input from combo boxes and selected calculate from menu. Right now it calculates and puts zeros in when choices are not made from the combo boxes by the user. It will include correct amounts for radio buttons and checkboxes if anything is entered. I need error messages for customer inputs and combo box inputs (if not selected from list of option in drop down for choices) (basically if nothing was put in a text box, the text box is empty. Of course the problem is the user must enter something in all 5 textboxes and not get multiple error messages in rapid succession to fix. We can't always count on our users putting in good data.. When I tried a Do While False with ORs I was getting endless looping. I could not get it to work because it will never execute because the control never passes back to the user.
I don't want to list a series of If/Thens becauser the user will see about 7 messages, where he/she only needs to be fed one at the time. I hope someone can give me some direction. I just need guidance on how to validate the text boxes and combo boxes. The code is analyzed with a "Calculate" on the menustrip. I would like for the calculation not to calculate and put outputs into the summery text boxes unless all textboxes are filled and combo boxes are valid for all the customer information and combo box choices for my two combo boxes describing what is needed for the order to calculate. There are also the radiobuttons and checkboxes, DIMs, Const, Variables, but not having problems with that part I have my indexing problems on the combo boxes worked out also, so I am not concerned about those now except for getting the error messages when I should. I hope that I have described my issues fully. I am using visual studio 8 with Windows 7
View 4 Replies
Mar 22, 2012
I have an application has a data entry form, and currently I'm using the form validation and validated events to validate the data - along with an error provider. I've read that this logic should be placed in the Dataset rather than the form. To that end, i've started exploring how to do that.
[Code]...
View 1 Replies
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]...
View 14 Replies
Dec 24, 2009
I have to make a learning object program for a school project and i am doing it about circular motion and satellite orbits.how i can get a object to orbit around another object in visual basic, allowing the orbit radius to vary as the user inputs values?
View 2 Replies
Sep 1, 2011
Assuming an architecture as such.MODEL > BLL > DLL
Trying to implement lazy loading in my MODEL I have run into a circular dependency between my MODEL and BLL..Basically imagine a property in my model that I want to implement as follows
Public Readonly Property ProjectCategory As ProjectCategory
Get
If Me._ProjectCategory Is Nothing Then
Me._ProjectCategory = ProjectCategoryBLL.GetProjectCategoryByID(Me._ProjectCategoryID)
End If
[Code]...
I have my MODEL, BLL and DLL in separate projects and because of the fact that my BLL references my model I can not reference my BLL from my model as this would create a circular dependency.
View 3 Replies
Mar 22, 2011
How do I draw a circular gradient like this in vb.net?
View 1 Replies
Aug 24, 2009
my team is working on an application where we have to have one image which is acting as the base of all the elements on the screen.. and this same image has a transparency in the center. now this centre transparency is supposed to display a picture which will be captured from a web cam.currently everything working fine but the only problem which we are facing is that the picture is not proportionate to what is the actual resolution that it was shot at. it has been stretched from the top and bottom. the reason is that the imagebox which has been used to call this webcam display is a aquare.now it seems that the team is not being able to use the exact proportions of the image to call it in the picturebox for a reason that the final image needs to be cropped to fit in a circle.in simple words, i have a rectangular image and i want to draw a circle over this image. whatever is within the circle should be visible, whatever is outside the circle should be transparent. (a mask needs to be created...)but the only thing is that this circle will first display the image/video from the web camera and only once the picture is clicked, it should show the same picture within this circular area.
View 3 Replies
Jun 8, 2012
I have been asked to improve the memory efficiency of an application that is used for high speed data acquisition. After running the VS memory profiler several times and scanning the projects for obvious issues I came to the following conclusion: despite using a fixed size circular buffer for storing acquired sample points, the RAM usage increases relative to the polling period. For example: polling data for one signal at 2 microseconds can use 5 times more memory (private bytes) than when running at 50 microseconds ... even though the buffer size is the same.
The circular buffer is an array of SamplePoint objects. Each of these objects contains an array of Shorts (16 bit) for corresponding data per signal and one date object (8 bytes) for the time stamp. For efficiency, the circular buffer is Redimmed only once every time it begins polling and filled with empty sample points which are then "assigned".
Also, it seems that when we stop and run the application it hogs even more memory each time as though the Redim is not releasing the previous array. My questions boil down to the following: What is most memory efficient way of implementing a circular buffer containing managed objects which have arrays?Also, how and why is memory usage increasing with a fixed size array with different polling speeds? Does the garbage collector not have time? Do local variables get disposed of IMMEDIATELY when a sub or function exits?These are some of the doubts and concerns that I would like to rule out before proceeding.
[Code]...
View 1 Replies
Jun 10, 2009
I have created a TextBox array where certain cells are assigned a number which I do not want the operator to change either intentionally or inadvertantly.The relevant TextBox cells are identified by their BackColor, (in this case LightBlue)If the cell is changed the original content is immediately assigned to the cell and a relevant message is displayed.My problem is that by changing the value back to its original value I create another TextChanged event and the consequence is that the MsgBox is displayed twice, one after the other.I have avoided the problem by not displaying a message box. The outward appearance is that the TextBox is not changed at all, which of course is my aim.However I would prefer to display a message box.An example of the scenario is shown below.
Another bewildering fact, (to me), is that in the example below, if the check is not made of the BackColor but instead the value of the TextBox the problem doesn't occur
Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
If TextBox1.BackColor = Color.LightBlue Then[code]...
In the example above, if in the Text_Changed event handler the 'Remark' is changed from one 'If' statement to the other the differences in the result can be seen.
View 3 Replies
Feb 24, 2010
How can I create a circular buffer on the heap in VB.NET ? This would be used for audio playback via P/Invoke to winmm.dll waveoutopen and waveoutwrite to support development of a software synth. I currently use the marshall class to build a regular array of bytes in the heap.
View 1 Replies
Jan 31, 2010
Is it possible to create a circular visual basic form. I see plenty of tutorials on how to do this for VB6 but none on Visual Basic Express.
View 7 Replies
May 24, 2010
I have a button which opens FormTest. When FormTest opens, it creates an instance of ClassTest and that class instance takes the form instance that called it (FormTest) so that it can perform operations on FormTest from the ClassTest class instance. So i have a form which owns an instance of a class which has a reference to the form.
[Code]...
View 1 Replies
Feb 7, 2012
There is a question that I have from YEARS after working with DotNetBar Components that How do you set the Marquee style of a normal progress bar on the circular one? The circular progress bar from DotNetBar, i want to be clear.There is no "Style" Property and now I really need to know it for a project I'm doing now
View 3 Replies
Sep 1, 2010
I've got a requirement where I need to calculate a value, however also refer to this value when calculating it. So I've got for example[code]...
I can see how this can be achieved in excel using Circular Reference, however I'm not sure how I go about it when using VB.Net. Is there a similar method to create a Circular Reference as in excel or any other way I can possibly work out the TotalValue?
View 5 Replies
Apr 26, 2011
If I were to draw a rectangle with e.Graphics.FillRectangle(), how would I make a circular portion of the rectangle transparent?
View 1 Replies
Feb 8, 2012
I use the following code (with Imports Microsoft.DirectX.DirectSound and Microsoft.DirectX) to play sound using an 8 second static buffer:
Dim SD As Device = New Device
SD.SetCooperativeLevel(Me.Handle, CooperativeLevel.Priority)
Dim MS As New IO.MemoryStream(Gbuffer) ' Gbuffer is byte array with properly formatted WAV data
Dim waveFormat As New WaveFormat
waveFormat.SamplesPerSecond = 44100
[Code] .....
What I would like to do next is to change to a "circular" or "streaming" buffer so that I can write new data "on the fly". I've done a lot of Googling but can't quite see how to adapt my present code to use a circular buffer. I can get the current write and play positions using Msb.GetCurrentPosition(iPlayPos, iWritePos) but how do I actually insert new data into the buffer? I have tried "manually" writing new data into my Gbuffer byte array but that doesn't work - I guess once a sound has been played through once, the data is cached somewhere and the contents of Gbuffer are not used again.
View 7 Replies
Jun 19, 2012
I have a class that is in an assembly due to being required for other projects that I'm currently working on. One class lets call it Class Factory, creates a group of controls which require click event handlers to be attached, I have algorithms which determine polymorphic behavior based on certain features but that is relatively irrelevant.
Due to the event handler having to open up a specific form that isn't part of my assembly, and that form requiring this "Factory" class. Without creating circular reference is there any way I can essentially "delegate" the handler event for the form to define? As a simple work around I have had to maintain two separate classes, one in the project with the form and one in the assembly.
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Me.Width = 1500
Dim panel As New Panel
panel.Location = New Point(0, 0)
panel.Size = New Size(1000, 200)
[Code] .....
View 2 Replies
Aug 3, 2010
I'm implementing some custom serialization (to byte array), and have run into a problem handling circular references.Example:
Class A
public MyBs as new List(of B)
End class
Class B
public MyParent as A
public MiscInt1 as integer[code]....
If I know that an instance of B will only ever be serialized through the serialization of an instance of A, then I can handle the setup of the MyParent reference from the instance of A and not even record that information inside the byte buffer for the instance of B.This doesn't feel quite right, but it might be the best solution.
View 1 Replies
Nov 30, 2009
I'm a newbie in visual basic. We have a project in our school in implementing queue using circular array.
View 5 Replies
Jul 3, 2010
So in Visual Studio, you can't have two projects X and Y such that X references Y and Y references X.In general, I can totally understand how having a circular dependency can be problematic, for a variety of reasons.But is it really not possible to compile two projects that are interdependent in this way? It seems to me that it must be possible, since (in my mind -- maybe I'm completely off-base about this) having two mutually dependent assemblies is really not so different from having two mutually dependent classes -- a case which is legal and can be compiled.
It would make sense to me if you said, "two assemblies cannot depend on each other because the compiler could not compile one before the other"; except that it seems you could make the same argument for two classes within the same assembly, and clearly the compiler can deal with this scenario just fine.
Basically the reason I'm asking is not that I have some desperate desire to do this thing that I know is generally ill-advised anyway. Specifically I'm wondering because it would be nice if I could have two projects -- say, MyProjectCS and MyProjectVB -- that existed basically as two mutually dependent parts of a single unit, and were only separate because certain parts were written in C# and other parts were written in VB.NET.
Is it possible to enable this behavior (in Visual Studio, or elsewhere, for that matter)? If it's not possible within any IDE, it it at least theoretically possible, or could mutually dependent assemblies not possibly exist? If it's not even theoretically possible, why not? In other words, how are mutually dependent assemblies different from mutually dependent code within a single assembly?
View 5 Replies
Oct 16, 2011
I have 2 projects
UI
Functionality
UI references Functionality to call specific functions. Functionality needs to call certain functions that operate UI. This is what I mean by Duplex communication. Is there any way to do this without causing circular dependency?Should there be 1 main project which simply does all the calling acting as a "wrapper" between UI and Functionality?
View 2 Replies
Jan 9, 2012
I have 2 classess. Role and User like this
Role
Public Class Role
Public Property RoleID As Integer
Public Property CreatedBy As User
[code]....
The situation is like when we create roles, we will save who created this role. So i have a CreatedBy Property of type User. Similarly when we create a User, we will mention what role the new user belongs to .So i have a property called "Role" of type "Role". This circular reference giving me StackOverflow exception as its recursive when i create an object of User class.How do i handle this ? should i restucture my entties ? how ?
View 1 Replies
