Getting An Error While Implementing An AVL Tree
Feb 17, 2012
I am very new to VB.net and I am having a hard time figuring out this error. I am using Visual Studio 2010.
The error is like this[code]...
I am also attaching all the files need to run this program. Please help me because I have been scratching my head for more than a week without any success.
The inorder traversal is working fine, but when I implemented the Breadth First Search Traversal to show the output of a numbers by level, then I started getting this error because I implemented new queue class (clsQueue.vb)for this.
View 4 Replies
ADVERTISEMENT
Jun 12, 2011
I am not the original author of this software project and the code is poorly documented. I am mainly a Java/C++ developer.The program displays the tree structure and allows files and folder to be selected. The program is getting errors with FileSystemTreeView when trying to return nodes on a system with a reserved partition.Here is what is happening: tree.SelectedNode = tree.Nodes(0) 'returns error with system reserved partition.calling, GetDriveList() will properly return all the drive letters - and not throw an error. Only when trying to get a tree.Node() or tree.load() is the error occurring.
View 3 Replies
Aug 10, 2010
Is it possible to automatically insert a Code Snippet when an interface is implemented? If so, how do you do it? I am looking for something similar to when you implement IDispoable in VB.[code]This will be used by web forms when transfering parameters from one page to the next using Server.Transfer
View 1 Replies
Mar 9, 2011
I'm getting this error when trying to implement an interface in vb.net:
Public Interface IFoo
ReadOnly Property Foo() As String
End Interface
[Code].....
View 1 Replies
Oct 20, 2010
drag and drop nodes within the same tree (not between trees) when users drag and drop nodes within the tree, give them the option to move the original node to a new location within the tree OR to just copy the original node in a new location (seems complex but I have a month to figure this out). change the system default blue highlight for selected nodes to another color change the system default cursors for invalid and valid drops (instead of the circle with slash indicating invalid target, i want a red minus) and (instead of the little plus sign with little box indicating a valid target, i want just a big green plus sign) add a red insert line to indicate where the node would be dropped within a tree also drag and drop the text of a node from the tree to a textbox add a "folder" image next to parent nodes and a "document" image next to children nodes
I have looked through the internet but I am having difficulty sorting through all the information available (I see a lot of information for Visual Basic 5 and 6, and those codes don't work for me in visual studio 2008). I can email anyone my code I have so far.
Public Class Form1
Private MouseIsDown As Boolean = False
Public Sub TreeView_ItemDrag(ByVal sender As Object, ByVal e As ItemDragEventArgs)Handles TreeView1.ItemDrag
[Code]....
View 4 Replies
Feb 16, 2011
Public Class IndexableLinkedList(Of T) Inherits LinkedList(Of T) implement an index 'property'
View 1 Replies
Jun 24, 2011
i've been trying to make a simple web browser, but i've been trying to have it run on WebKit because IE sucks. The first form is where the user enters in a product key, and after they enter in the correct key, it's supposed to open up the next form containing the actual web browser, except this is where i'm getting errors.
[Code]...
View 4 Replies
Jun 20, 2011
On a Windows Form in .Net 3.5 I have created a menu object and populated it with ToolStripMenuItems. One of these items has a DropDown object attached. The DropDown should appear when the mouse hovers over the parent ToolStripMenuItem and disappear when the mouse leaves the ToolStripMenuItem unless it is "leaving" the parent by entering the parent's DropDown.Also, I don't want the DropDown to automatically close when the user makes a selection in it, so I have set its "AutoClose" property to False.
Getting the DropDown to appear was easy. I just set up a handler for a "MouseEnter" event on the parent ToolStripMenuItem. But I'm stuck trying to make the DropDown disappear at the right time. If I set up a handler to close the it when the mouse leaves the parent ToolStripMenuItem, it becomes impossible to use the DropDown, because moving the mouse into the DropDown means "leaving" the parent ToolStripMenuItem, and so the DropDown closes as soon as the user tries to hover over it!
I haven't been able to figure out how to detect if the mouse has really left the whole ToolStripMenuItem / DropDown assembly (in which case the DropDown should close) or has only "left" the ToolStripMenuItem by entering the DropDown (in which case the DropDown should not close).This seems like a common design - a drop down that appears / disappears when the mouse hovers over / leaves the parent element - so how is it normally done?
View 1 Replies
Jul 10, 2010
how to implement such a thing , i am currently programming a compact framework vb.net this is what i have done and am stuck,what ive learn is very basic and simple i am using a sqlce query to use it to search for any string matching entries in the database and then it will display it something like google search engine.And am using visual studio 2005, what ive done is that i will use the datareader to search for the rows in the database and then i will have to assign them to something that is similar to google search engine a dropdown list of similiar results but am not sure how. What im doing is for the user to search for a particular salesman name and then have a progressive search function to also help the user to complete typing rather than typing the full words
Public Class FinanceSalesManCom
Dim connection As New SqlCeConnection("Data Source = My Documentsfinance.sdf")
Private Sub txtSalesman_TextChanged(ByVal sender As System.Object, ByVal e As
[Code].....
View 1 Replies
Nov 14, 2011
I want to achieve this in .NET either in WPF or VB.NET
I have a passport size photograph. In that I want to implement a fade effect on image border. The fade parameter we pass would be the pixel width and we require to fade image border such that fade depth is decided by this parameter.
Note:- I am not using any controls to hold this image. Customer will upload the images in the applications and we will modify the above required and send them through email it is going to be console application. any WPF or VB Controls to implement this.
View 1 Replies
Jun 17, 2009
how can i dynamically generate the set and get properties in VB.NET
View 5 Replies
May 16, 2012
As I design my system using VB.NET with SQL Server/T-SQL I'm always struck by what seems to me an obvious gap, namely VB Class Properties. Say I have a table Employee with columns: [code]In VB I might have a class like:[code]So my property SpeaksAForeignLanguage depends on two fields currently. Perhaps someday this will change and more fields or conditions might come into play. THAT'S THE WHOLE REASON for using properties.Now if I need the equivalent of my property in SQL for whatever reason there's no way to do it other than to recode some SELECT statement using the two Knows... columns.
View 1 Replies
Jan 5, 2011
On Form1 I have two textboxes (Username, Password), two checkboxes (Remember me, Keep me logged in) and a 'Login' button. I am using a MySQL database. Here is my code (w/out my database info, of course):
MySQLConnection = New MySqlConnection
MySQLConnection.ConnectionString = "server=REMOVED;Port=3306; user id=REMOVED; password=REMOVED; database=REMOVED"
MySQLConnection.Open()
[Code]...
View 2 Replies
Oct 28, 2010
I am working on a plugin architecture and after some reading I have settled on one. The host class will be implemented in C# as well as some of the plugins for that host. The issue I am having is that some of my team uses VB.net. So the question, is it possible to implement a C# (plugin)interface in VB, such that when it is dynamically loaded into the host program it will have the methods required by the interface.
View 1 Replies
Jun 21, 2012
I used to do this by eg String(52,95). (Getting 52 repetitions of an underscore) Cannot make out how to do it in dot net. I realise that String is no longer right but Str is not working either.
View 3 Replies
May 3, 2011
' I will declare some variables and constants ' these will be declared globally
Dim dblCost As Double
Const dblHANDLING_STRESS As Double = 595
Const dblSTRESS_DAYS As Double = 3
Const dblTIME As Double = 695
[code].....
My program needs a loop for calculation of items added to the listbox.
View 4 Replies
Jun 27, 2011
im trying to implement a search function to my booking program, wich retrieves data from a SQL database. I have the screan all set up and all the variables at the ready, the only problem is, im not sure how to execute it in a sqlcommand line.
I've got all the fields that are required, such as date, time but i also have two optional options, Room Type and Room Capacity.
How would i write a sqlcommand to search for available rooms that meet the criteria for the room to be booked?
Heres the code i have so far;[code...]
View 3 Replies
May 9, 2009
Dim SPECIAL As Acronym = "Strength, Perception, Endurance, Charisma, Intelligence, Agility, and Luck." The game I'm working on is going to use this style of system.
What I need to do is:
1. All SPECIAL values have to be between 1 and 10. [DONE]
2. When adding and subtracting from any SPECIAL; update remaining points accordingly.
3. If remaining points = 0, then you cannot increase any SPECIAL.
4. If remaining points <> 0, then you cannot continue until all are spent.
I'm up to task 2, but having some difficulty.I managed to figure out how to do it for one. For example:
Sub Numeric_Up_Down_Strength_Value_Changed() Handles Numeric_Up_Down_Strength.ValueChanged
Label_Remaining_Value.Text = CStr(10 - Numeric_Up_Down_Strength.Value)
End Sub
But I'm having trouble figuring out how to make it work for all. I've had some ideas but upon trying to implement them I've been having data type conversion errors.
View 9 Replies
Oct 21, 2010
How can i merge a combo box in a datagridview row.
datagridview is connected to datasource by code not with cool tip.
View 2 Replies
Oct 29, 2009
I'm new to ASP.NET MVC and need abit of advice on how to implement the following.The site is a heavily used site with roughly 200 users internally (intranet). We use forms authentication hitting a SQL Server DB (not windows integrated).
Some actions are protected, some are viewable by anyone and some are viewable by both - so if theres a logged in user they see their stuff from the DB, otherwise they see a temporary profile - much like StackOverflow.
How would I go about implementing a security model for this scenario? Can I reuse the existing framework in ASP.NET MVC and use the authorization filters?
View 3 Replies
Jun 8, 2011
GOCR is a common Optical Character Recognition software that can be implemented into almost any programming language. You must convert the image you wish to convert into a PNM file and then proceed to call the executable OCR file. I cannot find any conversion methods for Visual Basic, nor am I quite sure how to send the file to the program and retrieve the text. Has anyone ever worked with GOCR or happen to know anything above?
View 5 Replies
Apr 7, 2011
As many of you know, GOCR is a common Optical Character Recognition software that can be implemented into almost any programming language.You must convert the image you wish to convert into a PNM file and then proceed to call the executable OCR fileI cannot find any conversion methods for Visual Basic, nor am I quite sure how to send the file to the program and retrieve the text. Has anyone ever worked with GOCR or happen to know anything above?
View 3 Replies
Nov 11, 2009
IM Looking at Implementing MVVM in Silverlight.Kind of new to Silverlight and I'm Definately new to MVVM Pattern.I get it all But I want A set of small Prism VB.Net MVVM exmaples if that makes sense.
View 1 Replies
Dec 29, 2009
I am exploring ways of implementing access control permissions in a VB 2008 Windows Application.This is an application for a non-profit where users would log in and depending on their group membership (ie. warehouse, accounting, etc.) some forms would be available while others are not. (eg Warehouse cannot view donor info) Additionally some groups can view information but not alter (add, delete, edit) information.groups who are denied permissions would not be able to open certain windows forms. The question is what is an efficient method of creating this permission structure and how would it be implemented in the application?
View 4 Replies
Jul 28, 2010
I'm fairly new to VB and am having trouble implementing the Round function. I know that the syntax for what I'm trying to do is:document.write(Round("KwH",2))But my problem is that I can't get it working with the following line:.Kwh = items.Attribute("KwH").Value _So I want the output of whatever 'KwH' spits out to have only 2 decimals, despite the actual figure having 8
View 11 Replies
Mar 13, 2011
Is is possible to implement a type specifier with 2 interfaces in .net? Something like:
Public Sub New(obj as ICollection and INotifyCollectionChanged)
''Initialize Code
End Sub
View 2 Replies
Nov 21, 2011
I have a question thats been bugging me for quite some time now.Recently, I've created a ButtonRow control which is meant to host several buttons on its surface. These buttons are added through a collection property using the property grid of the VS IDE. The property is tagged with the DesignerSerializationVisibility(DesignerSerializationVisibility.Content attribute.The objects in this collection are serialized to the designer code of the form or usercontrol on which the ButtonRow is placed. Now it all works fine and everything except that I cannot implement a Name property. I'll explain what I mean by this.
If you've ever used the DataGridView control, you'd notice that the columns work in the same way that buttons work for my control ie a serialized collection. However, the DataGridViewColumn has a Name property which can is used as the variable name when the column is serialized into designer code.
Example: If you place a DataGridView on a form and add a column and change its Name to lets say "AGreatColumn" then the designer would serialize the column as such:-
[Code]...
I went as far as using .Net reflector to decompile MS source code to see how they may have achieved this but I could not find the secret. Also notice that the designer serializes my objects using a Dim statement but the DataGridViewColumn uses a Friend Withevents declaration at the bottom of the designer code file(I didnt it included above)
View 1 Replies
Feb 5, 2011
I have decided to use a flood fill algorithm for my application, using this pseudo-code from Wikipedia:Flood-fill (node, target-color, replacement-color):
1. Set Q to the empty queue.
2. If the color of node is not equal to target-color, return.
3. Add node to Q.
4. For each element n of Q:
5. If the color of n is equal to target-color:
6. Set w and e equal to n.
7. Move w to the west until the color of the node to the west of w no longer matches target-color.
8. Move e to the east until the color of the node to the east of e no longer matches target-color.
9. Set the color of nodes between w and e to replacement-color.
10. For each node n between w and e:
11. If the color of the node to the north of n is target-color, add that node to Q.If the color of the node to the south of n is target-color, add that node to Q.
12. Continue looping until Q is exhausted.
13. Return.
I was doing alright, until I hit the "continue looping until Q is exhausted".I don't quite get that.
View 2 Replies
Oct 25, 2009
I'm using VS2008.Is the following OK to do the following VB.NET with a very simple class (see below)?
for each CurrentObject as MyObject in MyArray
'access current object
next
The "simple class":
Class MyObject
public I as integer
end class
I seem to remember that something about needing iEnumerable, but my compiler isn't complaining.
View 2 Replies
Nov 16, 2011
I have a MVC application, which creates a Chart in the business logic like this:
StatisticsModel.Chart.Width = 150
StatisticsModel.Chart.Height = 300
StatisticsModel.Chart.Attributes.Add("align", "left")
StatisticsModel.Chart.Titles.Add("Statistics for: " + StatisticsModel.ProductNumbers)
StatisticsModel.Chart.ChartAreas.Add(New ChartArea)
[Code]...
View 1 Replies
