Make A Property "Write Once Read Many" In Program?
Jan 12, 2010
What is the best way to make a class property "Write Once, Read Many" such that you can only set the property once?
I know that I could pass all the properties in the constructor and make them ReadOnly, but in cases with a lot of properties I don't want a constructor that has 20+ arguments.
Also, I realize I can "roll my own" setters, but having to do that for every property seems like a bunch of redundant coding.
Is there a clean way to do this in VB 2008 .NET 3.5?
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Mar 23, 2011
Conceptually it seems like a derived class should be able to override a readonly property with a read write property. Why isn't this possible?
[code]...
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Apr 1, 2010
Can any one tell me how to read or write the control property values that has been saved as ocx state value in the XML? I have some controls. I am assigning a property values for that controls and it is saving as binary64 format. I need to automatically assign property values in the binary64 format in xml.
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Feb 25, 2009
I have a class which contains the object and a collection for that object. I want to make a property readonly to external calls, but allow access to that property from the collection class. I know I can use:[code]But, I want to the PreviousRow property to actually show as "ReadOnly" in the intelisense of the calling code of client app. The above does not. The only way that I see to make it show as "ReadOnly" in the called code is to mark the whole property as ReadOnly, but the problem with this is that my collection class code can no longer access this property:[code]I tried using the "Friend" declaration, but that seems to still allow Write access to the calling code.I only want write access from within the RowCollection class.
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Aug 10, 2011
I am currently making a GUI for Minecraft Coder Pack. MCP works off a system of batch files that launch python programs. I want to be able to read and write to these cmd windows throught vb.net. So that I can tell when a process has finished or to answer a yes, no question i nthe python program, with a gui from vb.net[code]\...
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Jun 6, 2009
I cannot find a way to make a program that I write make a shortcut in the start menu for all users.My final goal is to make an MSI and deploy it in group policy to all users on a computers OU. Is this possible?
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Feb 29, 2012
Reading and writing *.amc files using vb.net 2005. how to read and write *.amc files in vb.net 2005.
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Apr 9, 2010
$GPRMC,115432,A,2218.3118,N,11410.8105,E,0.0,204.9,050209,2.0,W,A*01
$GPRMB,A,,,,,,,,,,,,V,A*1C
$GPGGA,115432,2218.3118,N,11410.8105,E,1,12,2.0,18.4,M,-2.1,M,,*6B
$GPGSA,A,3,05,09,12,14,15,18,21,22,24,30,31,47,3.5,2.0,2.9*3D
[Code]...
give me a hand on read data from TXT format file, and how to read selected data only (RED) at $GPRMC
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May 5, 2012
I am trying to make a VB application that can read and write at excel or at SQlite db.With the excel my application works fine, but when i tried to share my application 1 of my friends can open it and all the others no.So i want to try with the SQlite but i dont know what i need for to support the sqlite at my VB project.I am using VB 2010 but i can also i can use C#?
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May 21, 2012
I want to read a text file and write the lines on different labels. Is it possible to generate labels?
I tried with four labels with label1, label2, label3, label4 names but I don't know how to create a loop to read every line of the file and write it in every different label. First line in first label, second line in second label etc.[code]...
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May 30, 2010
I've been scouring Google looking for a solution to my problem, but I can't seem to find anything so thought you guys might know a way of solving my problem.Im writing a little program which needs to change a few different memory address variables of a specific process.Does anyone know how first of all I can detect if the specific process is running on the user's machine, and then how I would read the value of the memory addresses, and write to them also.
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Apr 27, 2009
Is it possible to read, write to a text file in resources whilst the program is running. If this is possible then can someone show me how it's done.
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Apr 20, 2009
I got some set of base classes within one namespace and few sets of derived classes in other namespaces. Everything in one project.[code]...
OK, it can be done declaring .SubElements as Protected in BaseElement class. But in this case I cannot access this property from other classes in Base namespace that are not derived from it.
I tried adding Friend keyword, but it made this property visible when I'm instantiating derived classes too.
So... any way to hide some properties when using derived classes while being able to use them using base class?
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Sep 1, 2009
Is it possible to make a program intercept and stop certain write requests? I need it to stop viruses from tampering with an antivirus database. If you can, how do you do it? If not, is there another way to stop viruses from changing the database?
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Mar 30, 2011
im trying to make a program that can read a sms received through gsm modem.im using serial port to connect to the modem and use this code...
[code]...
in the first IF statement im trying to get the index of the msg then send an AT command to read the smg in the second IF, im trying to get all the data of the msg. in the index of 1 of the array i can get the number of the sender..my problem is that i cant get the entire msg of the sms.
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Mar 31, 2011
I am trying to make a program that is able to read out information about my iPod. Now I ran into this little snag, it says "The method or operation is not implemented"
This is my
Imports IpodServiceLib
Public Class Form1
[CODE]..........................
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Apr 18, 2010
I have a few questions.
1. What is the best when user doesn't have to see a website: WebBrowser Control, WebClient or something third?
2. How to get element by id in WebClient Class.
3. I am trying to make a program that will read stats of a website from Alexa. How can I make a code that will read Alexa Traffic Rank if code looks like this:
<div class="data up">
<img src="/images/icons/globe-sm.jpg" alt="Global" style="margin-bottom: -2px;">1,126</div>
4. Can someone show me an example of Google parser?
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Oct 18, 2011
The code below does not alter the value of the TextOut Property in the sc object (an instance of SomeClass).But none-the-less the Set routine for TextOut is invoked.There's no other way that the TextChanged flag could become True.But that's what happens when I run the code under VB2010 Express (the only place I have tried it).
Does anyone think that this is not a bug in the compiler?
I know that the problem is related to, maybe caused by, the fact that the first argument to LookAtTextOut ("whatever") is passed ByRef.But I do not see how passing an argument ByRef should result in calling a Property's Set routine when there is no code in the subroutine which changes the argument.[code]....
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Jun 1, 2012
I have a very simple class that holds a few public properties - ID, Text, Colour, etc. and a Boolean called 'SelectedItem'. Just like the Checked property on RadioButtons, only one item can have its SelectedItem property set to True within a particular group. Note: there will be several separate groups (lists), each allowed to have only one item with SelectedItem = True.
My first thought was that I would probably just have to handle everything outside of the class, setting SelectedItem to False for every other item in a particular list when another item was selected. But that seems rather inelegant to me. So I've been trying to think of how this might be done within the class. For example: could I perhaps have a private string property called say "GroupName" - set in the New sub when adding a new instance of the class - and then use a private shared method to set every item's SelectedItem property to False, provided the item has the same GroupName as the newly selected item? I would have a go at doing this but I have no idea how to enumerate every instance of a class from within that class, or whether that's even possible. Is it? Or is there another (better) way to achieve my goal? Here is a cut-down version of what I've got so far:
Public Class ResourceItem
Public ID As Integer
Public Text As String[code]....
As can be seen: instead of instantiating a new ResourceItem and passing that as an argument to the manager's Add procedure, I'm simply passing the details of the new item and the procedure is creating the item from those. I don't know whether this is a good or bad idea - please advise - but I've done it because I couldn't figure out how to make the SelectedItem property only writeable by the manager, so I wanted to avoid having directly accessible objects that could have their SelectedItem property set to True without it deselecting all the other items in the same group. Of course that still leaves the possibility of setting a variable to one of the manager's list items and setting it from there, so I would still like to know how I could prevent that, if possible.
UPDATE: I didn't use the code above in the end, deciding instead to go with Cyborgx37's solution - which seems to work perfectly well for me despite the warnings about best practice. I also realised I would need to use the same class in another scenario where multiple items could be selected, so it was easy to add a Boolean property to the manager to enable that.
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Feb 21, 2011
I have the following property in a property grid in VB.Net 2010.
<Description("Rapid Entry Post Car Wash Settings CarWashOptionPushButtons"), _
Category("Post Car Wash")> _
Public Property CarWashOptionPushButtons() As String
[code]....
I need to make this property a list box that gets the values from a database table and populates the list box with the values from the table. I have tried numerous things to no avail.
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Feb 27, 2012
Reading a .txt file in VB.net. My file path is C:UsersMyLilMulePepeDocumentsVisual Studio 2008Projectscurtain_calls.txt.
This is my line of Dim LoanOptionsFile As String = "C:UsersMyLilMulePepeDocumentsVisual Studio 2008Projectscurtain_calls.txt"
I can read the file when I run the program, but how do I write the file path so that someone else can download my program and file and read the file on their system?
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Oct 10, 2011
I am making trying to make a program that can read the file information directly from a specified file, but I am having a lot of difficulty reading things like file comments.An example of this can be found in windows XP when you alternate / right click on any file and click on properties. You'll get a lot of extra information.Now I have a few questions about this.
1.Can this information even be read in VB.NET
2.If so how
3.If not do I need to create some kind of data file to store the file information
Here is what I did so far
[Code]...
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Jan 7, 2010
I am just curious about this, but in all my years writing code, I have never once ever come across a time to use a write only property. Of course readonly is pretty common in class development, and while I may have had classes where I don't specifically need to expose a property for reading, generally you end up with a method like SetValue or something like that, which is more or less the same idea as a writeonly property.
I don't recall ever seeing a writeonly property in a .NET framework class. So can anyone provide an example where it actually made good sense to use a writeonly property over either a read/write property, or a method?
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Nov 8, 2011
What my program does is load a file (password list), then progressively reads each line of text in the file whilst writing each line to a new file. After X amount of lines have been written, it should start writing the lines of text to a new document until the initial password list has been split into X amount of password lists. The problem I have is that after hours of tweaking, all I can get it to do is write either blank ocuments, or write all of the lines to only one file. I really need it to be able to split into multiple files, preferably at runtime rather than loading a whole text document into the program in a textbox or array then writing it to new files.Below is the source:
Imports System
Imports System.Windows.Forms
Imports System.IO
[code].....
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Jul 29, 2009
I want to write a simple propety for textbox.
I know a structure of property statement but i cant do exactly.
example :
I want create a property name selectedlength1. And i have two textboxs in my form and i want to assign :
Textbox1.Selectedlength1 = 2
Textbox1.Selectedlength1 = 3
Then the length of string in textbox1 is selected is : 2 and 3 for textbox2.
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Mar 29, 2010
[code].....
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Sep 14, 2010
I want to write a program to write in an xml file in this format:
<?xml version="1.0" encoding="utf-8" ?>
- <Orders>
<Item id="1" SKU="998123" Description="Super Widget" Quantity="100" />
[Code]....
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Apr 1, 2012
i would like to be able to double click on a label for a text box and write a value into the .tag property and then change the color surrounding the label.for example.. if the user double click the default label..(which looks like the stardard label) then I would write a "1" to the tag property for that label, and at the same time, change the line color surrounding the label to red(maybe even changing the thinkness of the line).
when the user would double click the label again.. I was see that it was already selected and change the setting back to the default.
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May 7, 2012
I have a folder called movies. In this folder is a collection of different movies each in their own folder with their own xml file called movie.xml.I would like to extract lets say the localtitle and aspectratio from each movie xml and send to Excel. What code would I need to achieve this?So far I have the attached code which reads only one file and it is directly from the xml outside of a folder.
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Jun 13, 2009
Is there anybody out here in the VB, C# 2008 world that can direct me in the right direction? I do not want anything that has todo with c/C++or Direct Draw. When converting, there is no equal for SizeOf, and a few other things. I am using Lame 3.98.2.exe in my app along with LameShell that works fine for resampling, but , not for decoding an mp3 to wav or encoding a wav to mp3. You can find the LameShell project at [URL] . LameShell is a wrapper for the Lame.exe file. Here is the complete LameShell class file along with my app button clicks for the following,
[Code]...
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