Is It A Recursion Call
Oct 16, 2010The code is from a text book.[code]SetProgress is referenced within SetProgress, I don't understand it.Is it a recursion call?
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.net 3.5 - Recursion With XML Literals?
Jul 28, 2009I have a class called Profile that has some simple properties and then it can have a collection of ProfileItem that again has some simple properties and then it can have a collection of ProfileItem (RECURSION). Now I am trying to generated a very simple save function using XML Literals that come with VB.NET (3.5).
[Code]....
Recursion Error Down To One Subroutine
Jun 21, 2012I've tracked a recursion error down to one subroutine, So when my form loads, it populates some listboxes from a database; any one of these causes the error:
ListboxQuery("select sculptname, sculptid from sculptures;", CloseSculptList, "sculptname", "sculptid")
ListboxQuery("select distinct eventtype from events;", EventTypeList, "eventtype", "eventtype")
'etc, etc
And here's the subroutine (it's querying a MySQL database):
Public Sub ListboxQuery(ByVal queryText As String, ByVal resultObject As Object, ByVal resultDisplay As String, ByVal resultValue As String)
'queries the database for a 1- or 2-column list of values to display in a listbox
Dim myCommand As New MySqlCommand
Dim myAdapter As New MySqlDataAdapter
[Code] .....
The error is the standard recursion error:
An error occurred creating the form. See Exception.InnerException for details. The error is: The form referred to itself during construction from a default instance, which led to infinite recursion. Within the Form's constructor refer to the form using 'Me.'
This is weird for two reasons: One, as you can see, the subroutine doesn't refer to the form at all, so I don't see how it could cause a recursion error, and two, I wrote this subroutine almost a year ago and it only caused this error last week.
Asp.net - Implement Selection Sort In .net Using Recursion?
Oct 20, 2010I am trying to implement Selection Sort in vb.net using recursion. Problem is that I keep getting stackoverflow if the array I want to sort is 1000 elements. I can't find the problem. I don't know much about stack overflow or how to check it. From my research the problem could be infinite recursion but I check for that and exit the sub.Here is the main code:
Public Class SelectionSort
Inherits DefaultSort
Public Sub New(ByVal num As Integer)
[code]...
Everything should work as far as I know. It works on an array of 10 elements and an array of 100 elements.
Calculate The Factorial Of Given Number Using Recursion?
Mar 29, 2010calculate the factorial of given number using recursion.input the number in textbox and show the
result in another textboxrajeev ranjan, on 29 March 2010 - 12:38 PM, said:calculate the factorial of
given number using recursion.input the number in textbox and show the result in another textbox.
VS 2010 Converting Recursion To Iteration?
May 10, 2010Is it possible to make this function iterative or must it be recursive?
The Function traverses a grid of x length and y height. At each point in the grid, it checks all of it's neighbors to see if they are valid, meaning they exist in the grid and haven't been used yet.
The function works in it's current form but I was wondering if an iterative version would be more efficient.
PathManip is a Stringbuilder, stores the path currently being manipulated. PathQueue is a List(Of String), stores all paths yet to be traversed.
IsPathAlreadyUsed is a boolean function that checks whether or not a specified point has been used in the current path.
Sub FindNeighbors(ByVal coords As String)
Dim x As Integer = CInt(coords(coords.Length - 2).ToString)
Dim y As Integer = CInt(coords(coords.Length - 1).ToString)
[Code]....
File I/O And Registry :: Recursion In Datagridview Not Working
Aug 13, 2009In my application I am selecting a folder path and then asking the user if he/she wants to display full path or file names only.
My problem arises when I want to insert the results in a datagridview. The datagridview has 2 columns:
column1 ----> shows file name
column2 ----> shows file size in MB.
with the below code I get the file name and then the file size on the same column one after the other
I want to show as follows:
File Name Size (MB)
sample.txt 1.2
myspreadsheet.xls 0.6
Seanie.bmp 0.8
What do I need to modify in order to achieve this?
Code:
LINQ Recursion - Getting All Items For Specific System?
Dec 3, 2010I have a situation where I have a hierarchy. I'm trying to use LINQ to get all of the items throughout the hierarchy as opposed to For Each loops. I spent some time looking for examples, but most where C# using lambdas, and I'm not quite sure I understand it. I'd like to try to get all of the Items for a specific system, the levels of items could be n-levels deep.
Code:
System
SubSystem1
Item1
Item99
Item100
Item2
Item121
Item3
SubSystem2
Itemx
Itemy
Itemz
Rewrite This Recursive Function To Remove The Recursion?
Dec 29, 2009I got that little function(I changed the name of variables)
Private Function everythingLinked(ByRef myClass As cls, ByVal found As Boolean) As Boolean
If Not found AndAlso myClass.checked = False Then
myClass.checked = True
[code]....
I want to rewrite it so it would only be loop and no recursion and I'm currently lost?I'm passing a class to this function(with a starting value for found as false) to know if it is linked to the middle of the tree. The class got an array with a maximum of 4 link to other class and it can be circular(this is why I have a checked_link boolean).It does the recursion until there is no more link(return false) to check or until it find the middle link(return true).
edit?for an example, this
in pos 0 got link with 1
in pos 0 got link with 6
in pos 1 got link with 0
[code]....
middlepoint would be pos 15 the code above can prove that every position can be linked with the middlepoint so initial arg would be
everythingLinked(random pos, false)
and in this case it would be always true
VS 2010 - Form Constructor Recursion Exception
Aug 15, 2010I developed an app, tested on few computers and all seemed fine. But now, some people suddenly get an error, which I can't repeat on my computers. Part of the exception:
** Exception Text **
System.TypeInitializationException: The type initializer for 'NumoABC.functionsBurtuSummas' threw an exception. ---> System.InvalidOperationException:
The form referred to itself during construction from a default instance, which led to infinite recursion. Within the Form's constructor refer to the form using 'Me.'
at NumoABC.My.MyProject.MyForms.Create__Instance__[T](T Instance) in 17d14f5c-a337-4978-8281-53493378c1071.vb:line 180
at NumoABC.My.MyProject.MyForms.get_MainForm()
[Code] .....
The If Me.Created = False Then is because while the form is loading, some events fire the updatePersonDataHandlers() sub, but I don't want it to happen until form is fully loaded. In the module functionsBurtuSummas line 2
Module functionsBurtuSummas
Private f As MainForm = MainForm
I have many modules who work with the MainForms' controls, so I use a private variable f to refer to the MainForm.
VS 2010 - Recursion Error With Checked Menu Items
Feb 13, 2012I've got a menu with checkable items that appears on two different forms, and I'm making sure the two forms always have the same check states, so Form1 would have something like this:
Private Sub mnuWarnings_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuWarnings.CheckedChanged
'when one of these is checked, the other should also be
[code].....
But that yields this error:
An error occurred creating the form. See Exception.InnerException for details. The error is: An error occurred creating the form. See Exception.InnerException for details. The error is: The form referred to itself during construction from a default instance, which led to infinite recursion. Within the Form's constructor refer to the form using 'Me.'
There definitely aren't any references to Form1 within Form1.It only occurs when I use CheckedChanged--if I use mnuWarnings.Click, it works fine. And it only occurs in Form1 (the main form); CheckedChanged works fine on Form2.
VS 2008 Recursion Failing With Command/DataReader Objects Already Open
Jun 26, 2009I'm trying to put together a quick example for another thread about treeviews, and I'm getting a problem when I have a recursive routine, getting the message.
Quote:
There is already an open DataReader associated with this Command which must be closed first.
I'm a tad confused as I am explicitly creating a new command every time through the loop, so I'm not sure (unless its something ADO is doing behind the scenes) how the datareaders higher up the tree are interfering.
Here's my code :
Private Sub SetupChildren(ByVal ParentID As Integer, ByRef ParentNode As TreeNode)
Dim MyCommand As New SqlCommand("SELECT * FROM Groups WHERE ParentGroup=@ParentGroup", m_myConnection)
[Code]...
Obviously I could close the data reader down before calling the next level of recursion but it would prevent the code continuing the loop at the current level when it had finished processing children.
Error - The Form Referred To Itself During Construction From A Default Instance, Which Led To Infinite Recursion
Apr 14, 2010I have two forms. A main form and then another form that you can change settings in. Now when I click on the menu item to get to the settings form I get this error. "An error occurred creating the form. See Exception.InnerException for details. The error is: The form referred to itself during construction from a default instance, which led to infinite recursion. Within the Form's constructor refer to the form using 'Me.'"I've tried these codes.
frmSettings.Show()
Application.Run(frmSettings)
those didn't work so i tried these
dim settings as new form = frmSettings
settings.show()
dim settings as form
[code]....
and those didn't work. I'm using visual studio 2010 Pro.
Event Vs Recursion - Program That Has A Large Set Of Classes In It - Each Class Will Need To Add One Or More Strings To One Of Two Lists
Mar 14, 2010I have a program that has a large set of classes in it. A certain incident (I won't call it an event, yet, as that has a specific meaning that will cause trouble later) needs to a relatively small subset of these classes a question. The subset of classes will need to respond to the question, but for it to be able to do so, the classes may first need to ask a similar question of the same subset, which may prompt yet a further question, though this recursion will never go more than three or four levels down. Since only a small subset of these classes will participate in the questions, while the majority will never participate, and since all of these classes are virtually identical, and I can know at design time whether any given class is part of the subset or not, an event is appropriate. The main class can raise an event, and those classes in the subset can handle the event, while those classes that are not in the subset won't handle the event. Furthermore, any of these classes can raise the event again with different parameters, as needed. Thus far, an event appears to be ideal.
The problem is this: As a result of the event, each class will need to add one or more strings to one of two lists. Event handlers can't return anything, so I can't be using the return values from functions to populate these lists.
Two options appear possible:
1) Include the two lists in the event arguments.
2) Have the two lists be accessible to all classes, and don't pass anything around.
The second part of the problem is that the event is effectively a question being asked of each class, and no action can be taken until each class has responded. If I simply raise an event and let each class respond, can I be certain that all classes that should respond have? An alternative solution would be to have each class expose a method, and call these methods for each class in turn. By doing this, I could get return values, but I would have to call the methods for ALL the classes, not just the subset that actually cares (the classes are all different types, but they all implement a common interface, and are added to a List (of ) that interface, so I can iterate through them all without much difficulty). So, the event seems more efficient, but adding a function to the common interface for the classes is the approach most certain of being a solution.
.net - Cannot Call Stored Procedure From Code Which Works On Direct Call To Database
May 17, 2011I connected to the Informix server using RazorSQL, created a stored procedure and tested it, getting the expected answer, so the procedure exists in the database in some form.
I then run the following code:
If ConnectToInformix() Then
Dim cmd As New IfxCommand("dc_routeHasOutstandingQuantity", conn)
cmd.CommandType = CommandType.StoredProcedure
[Code]....
This error does not occur when calling the stored procedure from a live SQL connection.
Call A Dynamic Compiled Func(of ) Function Via Expression.Call?
Mar 22, 2012I want to create an ExpressionTree where a Func(of Vector, Vector, Vector, Vector, Double, Double, Vektor) should be called. So I use
Expression.Call(Forces(0).Function.Method, {Vec1, Vec2, Vec3, Vec4, Double1, Double2})(Vec1-4, Double1-2 are declared as ParameterExpression and Forces(0).Function as Func(of Vector, Vector, Vector, Vector, Double, Double, Vector). But I get an AgrumentException, because Forces(0).Function.Method has seven Arguments. (System.Runtime.CompilerServices.Closure as seventh argument at Index 0).
VS 2010 : Convert A DLL Function Call Which Has The Callback Function Routine Called Within The DLL Function Call?
May 25, 2012I am trying to convert a DLL function call which has the Callback function routine called within the DLL function call.The DLL function call signature is like this:
typedef void *HANDLE;
typedef HANDLE HACQDESC;
DECLARE_HANDLE (HWND);
[code]....
how to convert this DLL call to VB.NET and also how to create the callback function and send it as parameter to this function
call.
Call C# Form - Call The Form Called 'main'
Sep 22, 2010I have a VB .NET 2010 application. I added a C# project to my solution. I tried to call the form called 'main'. However, I could not figure out a way to do that. What is the best way to do that? I Goggled, and did not find anything. Actually I noticed that my Developer converted everything to VB .NET.
View 5 RepliesCall A .net Dll From .net?
Nov 23, 2010DLLs in .net are treated differently than in C++ and other programming languages.When you create a class library project in VS (for either VB or C#) you are creating a DLL. In order to call/use that DLL in another project you have to add a reference to your new program.Go to Project > Add Reference..., or right-click on the project that needs to use your DLL, and click "Add Reference...".
After a short wait you should see an Add Reference dialog box.There are several tabs across the top but each of the components that is listed in a tab represents a DLL. If you expand the "Path" column in the .Net tab you will see the DLL location.If your two projects are in the same solution, you should probably go to the Projects tab and add the project that you need.If your dll project is NOT in the same solution as your project that needs to use the dll, then go to the Browse tab and find your compiled DLL from your DLL project. This will add the DLL as a reference to your solution.
Call And How To Add Them?
Aug 13, 2010Okay, this is my first newbie question so I'm sorry for this newbie question.I've look at Toolbox and I just can't find whatever this called.I don't even know what the name of it too so if anyone know what this called,
View 3 RepliesHow To Add / Call A Dll
Aug 19, 2010OK, I'm still trying to read EXIF information, and have found a DLL I want to try to do this - [URL] I've added the DLL to my project, but how do I actually include it and then us it. The example code I assume is C or something?
[Code]...
How To Call A Dll
Oct 12, 2008How to call a dll in vb.net?
View 3 RepliesHow To Call A Sub From Another Sub
Mar 25, 2011How can i call a sub from another sub? I tried Call MyButton_Click but it didn't work.
View 1 RepliesAsp.net - How To Call Value From Web Form
Aug 19, 2009I creat one WEB project, this project contain tow WEB FORM, In the first Web Form Design i have tow TextBox for Entring the date(All dataTable between this tow dates) and one Button, I want that when i press to to this Button it will load the second WEB FORM and show all the Data Table in DataGrid In this WEB FORM, So i need To call this tow TextBox value from the first WEB FORM to the second WEB FORM In Load_Page i will use this tow value in select statment. So i want to know how to call this to value from the first WEB FORM. I'am using VB.NET WEB APPLICATION.i have allrady DB in SQL .
View 4 RepliesC# - .net Call Php Function?
Oct 31, 2011I am trying to call a php function from .net. I tried to a webrequest method but I am not sure how to specify the function to call in the url. A link below shows the method I am trying to call.[URL]..
View 2 RepliesC# - Call From .cs (or .vb) Into .aspx?
Feb 2, 2011I have a Visual Studio solution, containing .cs and .vb projects, as well as .aspx files. As usual, the .aspx files implement an ASP.NET site and make calls to the .cs and .vb projects.
Is it possible to do the reverse... i.e. make a call from a .cs or .vb file to a method in a .aspx file? (Assume for the purpose of this question that there is a good reason for doing this)
C# - Way To Call Remote Dll?
Feb 23, 2010Which is the best way to call remote dll? Where can i find examples for this?
View 1 RepliesCall / Use A VB6 Dll In Application?
Apr 11, 2009How do I call/use a VB6 dll in VB.NET application? Welcome to the All-In-One Code Framework! If you have any feedback
View 1 RepliesCall A DLL Function?
Nov 28, 2010I have created a new Class Library in visual basic and called it 'TestDLL'. I have a TestDLL.vb file where I put in this code
Class TestDLL
Function ReturnHello() As String
Return "Hello"
End Function
End Class
Then I clicked on the build tab and built the solution. I then copied the DLL 'TestDLL.dll' to C:TestDLL.dll
I am trying to use that DLL in a console application. I have tried this code but I get an error: System.EntryPointNotFoundException was unhandled Message=Unable to find an entry point named 'ReturnHello' in DLL 'C:TestDLL.dll'.
Declare Function ReturnHello Lib "C:TestDLL.dll" () As String I have added TestDLL.dll to the references for the console application and got that to work, however my goal is to load and unload different .dll files without restarting the application. I have a lot more code besides this, but I'm just trying to find out what commands I could use for just calling functions from DLL files.
There was something I was reading about assemblies, but all I get that to do is list the classes in my dll file. I will already know all the names and locations of the .dll files, and also the class and functions that they contain, because I will be building all of them. how I can get a simple function return in my console application.
Call A Web Service?
Dec 17, 2011I actually have a menstrip with sub-menu ... File > Service >>> Products
My aim is to add a uri to products so that when on click on product the particular web service will be invoked.
My question is only How Can I add a URI with Products on click ?