I have designed a small component I need to derive. The problem is one property from base class doesn't make sense in derived class, but won't hurts too (just it's ugly in property editor)
Now there is a solution to make that property non-derivable or hidden in derived objects?
I am finding that this may not be possible, but am trying to see if anybody has a solution.
I have four classes, two are core classes and two are those core classes extended[code]...
This fails because es is of type, extSecurity and the base class expects a type of coreSecurity. I've not found anyway to cast this to allow for me to override this base class in C#. In VB it works just fine.
I want to make 5 attachment options in that 4 out of the 5 are hidden.but when he clicks "more attachment" link it will show the other 4.Im using ASP.NET with VB?
View 2 RepliesWe use a custom collection derived from CollectionBase to store our Business objects
[Code]...
I need to migrate from Excel 2003 VBA to Excel 2007 VBA. When Microsoft introduced Excel 2007 it removed many objects from the previous versions and added some new objects. Also it hid some properties of particular objects. These hidden properties can be viewed by going to the object browser, right clicking any object and selecting "Show Hidden Members". My problem is I need to access these hidden properties. Is there any way I can access these properties. I can successfully migrate from Excel 2003 VBa to Excel 2007 VBA with the same functionality?
View 5 RepliesThere's some code I have hidden via the Outline-Hide selection method, and the hidden code shows as a box with 3 dots. I saw that if you put some code in the #region - #end region area the hidden code box can be renamed, but region-end region cannot be used inside a property, so is there any other method to rename the hidden code in a property?
View 4 RepliesI have set the Visibility property of the main window to Hidden and added the following in Window_Loaded:
private void Window_Loaded(object sender, RoutedEventArgs e){
this.Visibility = System.Windows.Visibility.Visible;
}
But it doesn't show up the Window.
I do have a customized treeView which inherits from treeview and uses customized treenodes which inherit from treenode. It works, but each inherited method of the treeview using a treenode as a parameter forces me to do an explizit cast from treenode to my customized treenode to access the additional functionalitiy of my treenode class.
Is there a general way to avoid explizit casting all day long? E.g. telling my customized treeview that all it's properties, mehthods, etc. from now on are working with my customized treenodes instead the general treenode as default?
Turning off option strict is not an option because I want to keep this. Overriding each method, etc. is to cumbersome.
Supose a base class
Public Class airplane
Private var_num_seats As Integer
Private var_num_engines As Integer
[code]....
Obviously, I don't wish that the class Glider has the method "start_engines" neither the property "num_engines". Otherwise, other child classes may have. How can I supress these property and method in child class, not just ignoring (if I can)?
make objects from the ToolBox using code instead of changing existing objects invisible then visible later?
View 7 RepliesI'm using Windows Task Scheduler Wrapper to schedule the tasks (basically to launch an exe console every two minutes or so) in a .net desktop application.However, I don't want it to pop-up the console every 5 minutes or even once. How do I hide it? I understand if I was using vb.net to launch the exe, there are several things I could have done. However, I am using windows task scheduler to launch it.
View 1 RepliesIs it possible to make a folder that is password protected that is only viewable by your application? I want to make a program that can make such a folder and allow access to it only through the program.
View 6 RepliesHow can I copy file and make it hidden .... I want to make file when the user click on create I want to copy file and make it hidden ....
View 2 RepliesI am working on some USB (flash drive) software which i want to make portable and always accessible on USB i know .net is not good for this because much users don't have framework installed but users who use this software have it installed and i just love VB.net :)
So what i want to do is to create a hidden partition on this USB device where software will store some info and itself. The software and data it stores is 6MB so i would also like to know the suggestions from you what size of this hidden partition can and i should make.
But:
how do i read from hidden partition through .net?
(i did never confront with this till now...) how i make hidden partition through .net?
I want this because users i working this for usually format their drives and that way they delete the software too, so hidden folder and encrypting doesn't help me in this.
How do i make a folder that my program makes hidden. I am using (MkDir)
View 5 RepliesI want to make a program that makes hidden shortcuts in drive c the files I want to add shortcuts for is in C:/program files/common files/apple/apple application support I want shortcut for all files and folders in this directory
View 4 RepliesI am trying to create a property for objects, though I am not sure if that is what it is called. For example, PictureBox.Image instead of Image I want to use my own property.
View 3 RepliesHow would i create and make a folder hidden from user?
View 3 RepliesI'm making a program that search for files with the specified extension. It also shows hidden files. How can I make the hidden files get a different color in the Listview? And how do I do that with only the hidden files?
View 5 RepliesThought I had got this sorted earlier but unfortunately not. A property in a class is a collection of objects.
[Code]...
I am using Entity Framwork and have an Entity Customer with a property of[code]...
However I noticed that this code does not get executed when Customer.CustomerStatus Is Nothing.
I need some advice: I need to create an app involving draging images to a treeview. What should happen is once the image is dragged to the node it must take an instance of a property. For example
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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.
My FormLoad event contains a simple line which is Me.Hide. Then I make the tray icon visible so the application can be shown if the user needs it. However, the Me.Hide statement doesn't work during the form load procedure. It seems to work fine after the form has been loaded. So, my question is, how can I simply stop the form from becoming visible in the first place or hide it after it has loaded?
View 4 RepliesI need to iterate a collection of objects. Based on a property value of the object, I need to group objects together. I also need a total count of each discrete property value. I do not know how many groups there will be and there could be 1 to n objects in each group.How do I do this? Are there algortihms that could help me out with this? Psuedocode or references are fine.
View 2 RepliesI have a form with a series of basic objects,, a list box a few buttons, a few text boxes and a few labels..
Anchor property works just fine on all of them except one text box and one label. The property is clearly SET on both objects and I can't, for the love of me, figure out what is making these two act "disobediently".
I have class [code]...
But i get error in For Loop: Object reference not set to an instance of an object at the first line of for loop.
I want to loop through all objects that are loaded in my project ofType x and change a property in each of them... Is there any way to do this?
View 3 RepliesI 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.
I have a custom class (Class1) with a bunch of properties. One of the properties of this class is another custom class (Class2) with its own properties.I have a property grid with the selected object set to Class 1. I can see Class 2 as a property, but i would like to expand Class 2 to show its properties in the same property grid.
Im basically trying to do the exact same thing as the Font Class on a form. If you look at the properties of a form in the designer, you can see the font property. You can then expand that to show the properties of the font class.