Make Program Property Visible Only Within Specific Namespace?
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?
Now what I want to do is, when I Enter something on Textbox1 and click Button1, Label1 should be visible and blinking.
Label1.Visible = True
But, when I type something on Textbox1 again (before even hitting Button1), Label1 should not be visible anymore and continues this way.Another way is to make Label1 visible for a specific time, say 5 seconds (blinking) and goes invisible. I prefer the first one though I would love to learn both?
I have written a Visual Studio 2008 addin that adds controls to a Form. I want some of those controls' Visible property set to False so they're hidden during runtime, so I do this:[code..]
This doesn't work. Not only is the control invisible in the designer window itself, but the Visible = False code doesn't even make it into [FormName].designer.vb. I have tried forcing Serialization on the Visible property like so, to no avail:[code...]
I have written a VB2008 program in which I want to put graphics output in a PictureBox but keep the PictureBox hidden until a "Show Graphics" button is pressed at runtime. I have done this by setting the PictureBox's Visble property to False at design time and then adding a line in the Button Click code (before the main graphics code) to make .visible = true. Now when I press the button, the picture box becomes visible but stays blank. I have to press the Button a second time to get the graphics to show. It doesn't matter where in the Button code I place the PictureBox1.visible = true line, the result is the sdame. WHY ? Other VB Controls, eg RichTextBox will stand being made visible and then display output with only one click of the button, why is PictureBox different ?
I have placed several PictureBox Images of different colored dots(which represent lights) on an image of a Christmas Tree. I can make the lights randomly flash using a randomGenerator and a Select case statement. However, the code is very long. There are 67 lights on this tree and the code is 71 pages long. There has to be an easier way to do this. So far I have tried the following with two images of lights just to see if it would work and it does not work:
i'm trying to make a program that searches for a specific file in a specific file, so when the program loads it "writes" in checked list box the names of the drives installed to the computer, but what i want to do is: when the user checks the box, i want it to search for the file in that drive, but i don't know how to do it...
I'm using:
Imports System.IO Imports System.Collections.ObjectModel Public Class Form1
[Code].....
how to make it search in the other drives using the checked listbox?
I need to know how can I make a program for specific hard disk? I have heard it that programmers use hard disk`s unique number to protect their program. So that user cant use this program there in another pc(hard disk).
Is it possible with VB .NET to make the program use specific regional settings? More precisely , I want to make my application always use the English regional settings (those defined from Control panel > Regional settings) in order to always use (and calculate) the decimal numbers by using the dot symbol ( . ) as decimal separator , regardless the settings on the current PC (in order to avoid forcing the user to change his Regional settings) ?
I am fresher in vb.net but I want to develop a project in this case I want to use the system.Configuration namespace's specific calsses. But I am not clear which class i use and why it's function and it's use.
The visible property has gone missing from properties. It still appears when your clicked on a textbox or label etc, just not when u have the form selected. Also doing it by code is not working e.g. form1.visible = false. Does anyone know what may have happened and/or how to get it back.
I have a table in MsAccess with the fields CustId,ItemId,Description,Price,Amount.On a form in vb express..there is a combobox for ItemId which is already populated with the ItemIds of all the Description of Items. the program is running fine and it is saving data into table through a saveButton Click event.Since ItemId is not necessary to be visible to the User so i set the Visible property of Combobox as False. Now what happened that it gave error while saving data because the programme took as ItemId field is missing for the information to save in table.When i set the Visible property of Combobox as True the programme works fine.How i can hide Combobox ItemId without interrupting the programme to save data.
On a form in vb express.........there is a combobox for ItemId which is already populated with the ItemIds of all the Description of Items. the program is running fine and it is saving data into table through a saveButton Click event.Since ItemId is not necessary to be visible to the User so i set the Visible property of Combobox as False. Now what happened that it gave error while saving data because the programme took as ItemId field is missing for the information to save in table.When i set the Visible property of Combobox as True the programme works fine.
My problem is quite simple and I am probably just not using the correct syntax, I am trying to add an attribute in my class so that when I serailaize the object it will include the schemalocation attribute in my generated XML.In C# I would be looking at doing something like this:
[XmlAttributeAttribute("schemaLocation", Namespace = "xsi")] Public Property schemaLocation() As String Get Return "http://www.w3.org/2001/XMLSchema MyNewsItem.xsd"
[code]....
However in VB Im unable to find the translation for [XmlAttributeAttribute("schemaLocation", Namespace = "xsi")]
I want to use project B property in project A. Hence, I added project B to my solution. How can i use the property of B? Can someone guide me? i'm new to vb.net..To my knowledge, we need to use namespace and create a new instance. Could someone guide me on how to use namespace for this purpose?
I'm using Access 2010 and would like to know if there is a way to test whether a command button's visible property is True or False? If there is, am I right to suppose it would be the same for any control?
I have 2 group oxes of equal size on top of each other. I would like to click a button and show 1 and hide the rest. but even when i just use ''grpBxSalads.Visible = True, for the second button, it fails to show the group box. [Code]
I have a UserControl that retrieves a bunch of data from a database. It uses the current date as one parameter to determine which data to show.
The database however is a little old and has no data available after April 2009, so while debugging I cannot get any data and hence I can't test the control.
As a solution I simply used a date in the past instead of the current date, just so I could see some data. Obviously, this has to be changed in the release version of the application, but I'm worried it will be forgotten, leaving the control completely broken, and worst of all, it's very hard to tell that it is returning the wrong data, so the users won't see the problem at all.
Now, I'm looking for a way to change the date used during run-time. A property in the UserControl would be the best solution for me. I could have a property UseTestDate or something, and if that was True, the test date was used. It would be set to False by default, so that the regular date is used by default.
The application has a Property Grid which is used to change the properties of the UserControl, so that's how the (test!) user can change this property. He can choose to show the current date (but there probably won't be any data preset), or he can set the UseTestDate property to True and get some old data.
The problem, obviously, is that the end user in the final application will also see this property in the grid! I don't want that obviously, there is no need for them to use a test date.
So I am looking for a way to make this property visible only when the application is run in DEBUG mode (via the VS IDE). I can make a property invisible simply by setting the Browsable attribute to False. I simply don't know when to set this. The attributes only allow a constant, so I cannot use a variable that is True when the application is in debug mode or something.
I tried simply putting the whole property between a conditional compile statement:
#If DEBUG Then Private _UseTestDate As Boolean Public Property UseTestDate() As Boolean
[code]...
I am able to Run the application in debug mode, even though there is the error that UseTestDate cannot be found. It seems that the property can be found when I run it (which makes sense of course, as it's only compiled when in debug mode). However, using that code I am unable to Build the application so I can run the executable; the error does not 'vanish' then...
So, how can I build an application that uses a property that is only compiled when the application is run in debug mode?
I'm experimenting with xml literals in vb.net and there's something I don't get. Here's a small sample that illustrates the problem. I'm adding two PropertyGroup nodes to an empty Visual Studio project. The first one is added as xml literal, the second as new XElement:
Imports <xmlns="[URL]"> Module MyModule Sub Main() Dim vbproj = <?xml version="1.0" encoding="utf-8"?> <Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="[URL]"> [Code] .....
This code writes the following output: <Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="[URL]"> <PropertyGroup xmlns="[URL]"></PropertyGroup> <PropertyGroup /> </Project> As you can see, the first PropertyGroup node contains a redundant xmlns declaration. Why is that, and can it be avoided?
WinForms. VB.NET VS 2010 Professional. So I am building a form that has 3 radio buttons on one side of it.Then on the left side I have 2 group boxes named Group1 and Group2 for this question that I have placed in the designer so that the one covers the other one and have set both of the groupboxes visible property to false.. When a user click on the second radio box group1.visible changes to true and group2.Visible changes to false.. When a user clicks on the third radio group1.visible changes to false and group2.visible changes to true. If the user clicks the first radio button both group1 and group2 visible changes to false.Only one of the group boxes shows.If I open the designer and ONLY change which one is on the bottom then it will show and not the other.[code]
I am stumped on this one. I have a panel (pnlKeyPad) that won't change the visible property when I try to set it to True. But when I try to set the Dock Property to DockStyle.Fill it succeeds. I have tried them in different orders, setting the parent property to the splitpanel and nothing seems to fix it. The panel is on a splitpanel that is visible. The panel is set to visible = false by default.
Any ideas of why this panel won't switch to visible when I specifically set it to visible?[code]...
I know how to turn a control's visible property to true or false, the only thing I don't know is: If I have, for instance, 40 group boxes in which only one is visible, when I click on a button, the first group box visible = false and the second group box visible = true, and when I click on it again, the second group box visible = false and the third group box visible = true, and so on I don't want to write the codes for every controls, since it will be quite time consuming, I want to use fewer codes to achieve this objective,
Having an issue with my data gridview. I've set the visible property of the ID column to false, and in the designer the column is hidden, yet it still shows up when i run it. Now if i set it to True it shows the column twice.
I want to alter the .visible property of a label based on if a variable is positive or negative (Hiding it for negative values) But I want to do this for lots of labels so If Statements are too bulky.
I tried this:
Label1.visible = CBool(IntVariable1)
But it turns out CBool returns True for ANY value and False for Zero.I'd assumed it would be True for positive values and False for negatives.How can I do it without if statements?I considered Modulo or SquareRoots to somehow convert a negative number into zero, but didn't want to complicate things with imaginary numbers.
I was just wondering if it is possible to apply an attribute to a property within a business object (MyBusinessObject) such that after the DataSource of a grid is set to a List(Of MyBusinessObject), the visible property of the column will automatically be false. For example:
myGrid.DataSource = New List(Of MyBusinessObject) Public Class MyBusinessObject
