.net - Implement A List(Of) With A Maximum Number Of Items?
Nov 14, 2011
I'm trying to figure out a good way of implementing a List(Of) that holds a maximum number of records.
I have a List(Of Int32) - it's being populated every 2 seconds with a new Int32 item.
I want to store only the most current 2000 items.How can I make the list hold a maximum of 2000 items, then when the 2001'th item is attempted to be added, the List drops the 2000'th item (resulting in the current total being 1999).
Thing is, I need to make sure I'm dropping only the oldest item and adding a new item into the List.
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May 13, 2009
I recently upgraded a project from 2003 to 2005, and there were errors in them, but I am unable to view any in the error list. Only one error displays in the list
[Code]...
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May 19, 2011
Does anyone know how to add a limit to the number of items in a list box? For example, you can't add more than 10 items in ListBox1.
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Jul 6, 2010
I want the program to check the number of items in a list box, then send use that number to form a FOR loop and send each to the serial port individually. It actually sends everything, but the program always crashes after the last one saying that the sdprintcount variable is an invalid number for the index. I don't get it as this happens no matter how many items are in the list, and it always crashes on the last one. It sends it, but then it says the index number is invalid.
*********************************
Dim sdmods As Integer
Dim sdmodsp As String
sdmods = sandwichmodlist.Items.Count
[code]....
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Apr 4, 2011
how can i get the maximum number in visual basic
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Jan 23, 2006
I'm using VS 2005, after VB6 to VB.NET conversion we have fixed all the errors but still have unidentified number of warnings. Is there any way to increase this limit of 101 warning you can see after compiling? I want to actually see the total number of warnings to get an idea how much work is there.
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Feb 9, 2011
Im trying to complete code for a program I am running regarding the Collatz Conjecture. Im using Visual Basics 2010.This is the code I have thus far :
Dim a, count As Integer
a = TextBox1.Text
count = 0
ListBox1.Items.Clear()
[code]....
This code allows me to type in a number and see the length of the hailstone sequence and the hailstone sequence itself. What im not quite sure on how to do is this following: I would like to add the maximum sequence number reached in my program, but I am unsure on what to do.
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Jan 13, 2009
how many variables and controls (i.e. text box, listview, buttons, etc) can a VB program has without slowing down its performance?
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Jan 18, 2011
I am moving from VB 6 to VB.net. Are there any practical or hard limits on the number of controls per form? If so, what are the limits?
Are control arrays still supported in VB.net?
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May 14, 2011
My issue is that some websites only allow say 15 characters maximum to be used to create a user name where other sites do not. Currently I have one text box on the screen and a button, and a web browser that navigates to two sites.Site #1 has a cap of 15 characters max to create a user nameSite #2 doesn't have any maximum amount of characters to use.I am wanting to know how I can enter lets say a 20 character username into the text box and have the code set a max of 15 characters for site one and nothing for site 2. I was thinking that this could be done when passing the information from the text box to the text box on the screen with something like
Textbox1.Text.value.length= maximum 15
Site #2:
Textbox1.Text
[code].....
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Aug 13, 2009
What is the maximum number of executions in a while loop in VB.net that it will allow? Meaning, it is checking for a variable to equal some value, but that value never comes? How many times will it execute the code before it quits? Is there some way to set the maximum number of executions without terminating it programmatically?
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Oct 27, 2010
one of our programmers is having an issue with a asp.net app. i had him rebuild and recompile the app to the network share on the staging server and received the same. i even deleted the files in this folder(C:WINDOWSMicrosoft.NETFrameworkv2.0.50727Temporary ASP.NET Files). to make sure that the server was not the issue i installed it on another server and received the same error.i found a article on msdn that states that its a source code issue.
Compiler Error Message: BC30041: Maximum number of errors has been exceeded.
Source Error:
[No relevant source lines]
Source File: vbc : Line: 0
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May 5, 2011
I have been looking all around Bing and Google trying to find this, does anyone have an answer? How many line continuations will the compiler tolerate in VB.NET 2010 (.NET 4)?
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Apr 21, 2010
i am trying to put a maximum row number of lines in a multiline textbox. What i want is to achieve something like a console, with a maximum number of rows, with the top rows to dissappear and to keep always the last i.e. 500 rows. a note: for the textbox text i use the following algorithm
dim text
textbox.text = textbox.text & vbcrlf & text
the problem is that after a certain number of rows the program starts to get a little slow. So i guess if i put a limit to the rows i will fix this.
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Mar 9, 2012
I developed a client-server application using soket technology. At this moment the number of clients that connect at the same time is 40. Question: What is the maximum number of clients that can connect simultaneousl
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Apr 5, 2011
1) Is it possible to set the maximum number of characters that a string can hold?
Just like the following example from VB6:
Dim my_var As String * 10
2) I noticed that Option Base 1 does not exist. I created a table my_table(2) and tried to msgbox the following[code]...
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Sep 2, 2010
Im wanting to use a textbox for the entry of Decimal figures (currency). Is there any way I can have it so if a user does not put a decimal figure (ie 15 instead of 15.00) it will put it on.
I tried a masked textbox, but that means i have to set the maximum number of digits before the decimal too which is no good.
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Jun 26, 2009
I have this app to copy files with a progressbar... What I'm trying to do is to set the progressbar1.maximum to the number of files in the folder. But I'm getting a cross-thread error. This is the error I'm getting: Cross-thread operation not valid: Control 'ProgressBar1' accessed from another thread than the thread it was created on. This is where I'm trying to set the ProgressBar1.Maximum: [code]
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Feb 7, 2011
how can i code a simple program to generate the maximum number i enter/type within 3 or more numbers using math.max. for example, if i enter 25, 60, 45 how can i use math.max to calculate the largest value out of the 3 numbers?
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Jan 23, 2012
I feel there must be a single line, more elegant way to find the highest page number in my list of report pages. The code below works fine but seems verbose. Is there a better way?
Dim numofpages As Integer = 0
For Each reportrow In reportlist
If reportrow.reportpage > numofpages Then numofpages = reportrow.reportpage
[code].....
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Aug 3, 2009
Is there a limit to the maximum amount a List(Of T) can hold? I need to know because I have a program that could potentially wind up in a really large loop that would add over 200 or so items to a list at one time.
MSDN search didn't really tell me much, but I'm in a rush at the moment, and was just wondering.
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Mar 8, 2011
i have a list of value contains null values and digit value
i want find max value from list but I do not know what with null value
I do not want to use null values in compare
how to how to computes the maximum value in a list contains null values and digit value in vb.net?
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Jun 25, 2011
Using Irrlicht (with Irrlicht Lime wrapper) and am looking for examples of how to implement items with VB.NET (vs2010).The only thing i've been able to find is C.net examples and a single VB.NET example of the most basic mesh loading (project #1-hello world)
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Aug 16, 2009
how to implement some items in context menu? for example i mean how to implement a "Open in new window" when i want right-click on a link in the page?
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Dec 14, 2011
I've got some old code of mine that I'm going back to and updating a little bit. On one part of it I need to check if there are any items in the recycle bin or not.
This is the code I was using to accomplish this:
vbcode
Private Declare Function SHQueryRecycleBin Lib "shell32.dll" Alias "SHQueryRecycleBinA" (ByVal pszRootPath As String, ByRef pSHQueryRBInfo As SHQUERYRBINFO) As Long
Private Structure ULARGE_INTEGER
[Code]....
The msgbox and end is just in there for debugging purposes. This always returns all 0s, even when I know that there is something in the recycle bin.
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Mar 12, 2008
I get some very generik trouble need to implement List View with Image in SubItem. All can be very fine ....But I need to use Virtual Mode. Whatever I search I haven't still found working solution's. I have found some C# code that seem's do that. But I can't convert it in VB.Net. let's explain detaly.
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Oct 1, 2009
I'm looping all the properties in an object via reflection:
For Each p As PropertyInfo In values.[GetType]().GetProperties()
If p.CanRead Then
'Do stuff
End If
Next
how to determine whether the property in question is a generic List(Of T)? If it is I need to loop the list itself.
I've experimented with GetType and TypeOf but have not managed to get anything working.
To clarify, I want to keep this generic. I do not want to specify the type of T, I need to loop the list items and call the ToString method on each item. T could be one of a number of different types (application specific reference types). Is it possible to do this without specifying types?
(VB.NET 2005 with .Net 2.0)
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Mar 16, 2011
This program is supposed to allow the user to check items in a checked list box. If the item is checked, it goes into the Completed List Box on the right. The program then adds the unchecked items to the Pending list box on the left. I keep getting placement values (e.g. O,1,2) instead of the strings (e.g. "Key Returned") in the list box results (see photo attached)
Public Class frmCheckOut
Dim i As Integer
Dim cleaning As String = "Cleaning Inspection"
Dim damage As String = "Damage Repaired"
[code].....
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May 16, 2011
Another program I am working on for fun, I am basically shuffling a list inside a listbox, what I want to do is delete the rest but not sure how to go through with that. At the moment I have this: [code] Just contains the code, declarations outside weren't included.So anyway, once clicked, it will call on the function to basically shuffle in a for loop, I was wondering if I should (or how should) create another function and call it in the click button or have just a loop in the click button so it deletes half the list. What I am doing is I have 20 list of items, I want the program to shuffle the items and then deleting the lower 10, meaning, if I had 10 items and wanted 5 top, I'd want: 0, 1, 2, 3, 4 and deleting 5, 6, 7, 8, 9.
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Jul 20, 2011
I am attempting to read the results from a SQL query into a List(Of) and I can see the List.count while adding items to the List increments, however in another part of my code when I am attempting to read the List the List.Count returns 0. My List is as follows:
[Code]...
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