VS 2008 Removing Properties From A Control That Is Already Used?
Feb 19, 2009
I first noticed this problem using C#, but I thought at that time it was something that did not happen in VB, so I posted a similar question in the C# forums. I never saw it happen before, but it seems it does happen in VB too, so I decided to post the question again here in the hope that VB at least has something that helps me...
The problem is that I have many (around 30) instances of a custom control on a Form. The custom control is just a class inheriting from Panel with some new properties. I decided to create two BackgroundColor properties (1 and 2) to allow for gradient backgrounds. I'm not sure if this matters, but I simply left the second BackgroundColor property empty (never initialized it), because I was not using it yet.
After placing around 30 instances no my form, all in different levels of nesting in different FlowLayoutPanels (took me an hour at least to get everything right), I tested it out and decided it looked ok, and it didn't need a gradient background color after all.
So, I went in the custom control code and simply deleted the second BackgroundColor property.The result was 30 errors in the form's Designer.vb file. It seems each control was still trying to set the property (to Color.Empty), but obviously could not find it.I could no longer access the form's design view, except if I click the 'ignore' button and lose all the controls.
Is there no way I can 'safely' remove a property from a control that is already on a form, so that the designer file updates itself accordingly and no longer tries to set the removed property?It seems foolish that I have to remove the 30 errors (actually 120, because I still need to remove 3 more properties) manually from the designer file, when I know the editor is perfectly capable of finding all references to some name and for example renaming them (the context menu Rename function), so why not delete them?
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Sep 28, 2009
I first noticed this problem using C#, but I thought at that time it was something that did not happen in VB, so I posted a similar question in the C# forums. I never saw it happen before, but it seems it does happen in VB too, so I decided to post the question again here in the hope that VB at least has something that helps me..The problem is that I have many (around 30) instances of a custom control on a Form. The custom control is just a class inheriting from Panel with some new properties. I decided to create two BackgroundColor properties (1 and 2) to allow for gradient backgrounds. I'm not sure if this matters, but I simply left the second BackgroundColor property empty (never initialized it), because I was not using it yet.After placing around 30 instances no my form, all in different levels of nesting in different FlowLayoutPanels (took me an hour at least to get everything right), I tested it out and decided it looked ok, and it didn't need a gradient background color after all.So, I went in the custom control code and simply deleted the second BackgroundColor property.The result was 30 errors in the form's Designer.vb file. It seems each control was still trying to set the property (to Color.Empty), but obviously could not find it.I could no longer access the form's design view, except if I click the 'ignore' button and lose all the controls.
Is there no way I can 'safely' remove a property from a control that is already on a form, so that the designer file updates itself accordingly and no longer tries to set the removed property?It seems foolish that I have to remove the 30 errors (actually 120, because I still need to remove 3 more properties) manually from the designer file, when I know the editor is perfectly capable of finding all references to some name and for example renaming them (the context menu Rename function), so why not delete them?I am sure I'm simply missing something basic here that I somehow never learned and never needed before in 2 or 3 years of using VB.NET.If not, do I really have to remove 120 lines manually, each hidden deep in the designer code in different lines?!I know I could simply remove all controls and re-add them, that would get rid of the errors, but it will take me forever to set them up again correctly, including the events etc..
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Sep 25, 2009
How can I basically lock a default property so the user cannot edit it? For example, if I wanted to lock the BackColor property, how can I make it so the end user of the control can't edit it?
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Jan 29, 2010
How would I remove an item from the listbox.. I used the code below to populate using a class with description and value properties.
I cant use listbox.items.indexOf("listitem1") to get index
I cant use listbox.items.remove("listitem1")
If I use listitem.items.removeAt(1) it works of course. How can I get my index in this case?
'Users
Dim IAdapter2 As New ds_SecurityTableAdapters.Security_UsersTableAdapter
Dim usersDT As ds_Security.Security_UsersDataTable = Nothing
usersDT = IAdapter2.GetUsers()
Dim userItems As New List(Of myItem)
[Code] .....
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Apr 27, 2011
I'm making a control and I am trying to finalize my design time properties grid. I have several List(of Class) items as public properties and when I click on the design time menu (while testing the control) there is the word "Collection" and a button with an ellipsis (...) that brings up a neat pop up with the buttons Add/remove and all of the public properties of the collection's class on the right hand side. Basically for a non-collection instance of a class (with public properties) I'd like a similar button to show up. I know I could put all of the properties in the main control class and group them, but I like the pop up box feature. Anyway to duplicate this? (think font grid item etc.)
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Aug 12, 2010
I have a custom control and have created some properties for it.When I click on that control, its properties are then shown in the PropertyGrid.The problem, is that I only want to show some of the predefined properties as well as my custom properties.Does anyone know how I can filter out the properties I want shown?
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Jul 16, 2009
I've written my code to implement a new property and to set the content to this default text and grey the text whenever the textbox is empty, and to hide it when the user starts typing. This all works fine at runtime.[code]My question is this : If I place an instance of the control on a form, and set the DefaultText via the properties grid, why doesn't my Property Set code run?I'd expect the control on the form to show my new DefaultText in the control, but instead it remains blank. When I run the form it does display correctly, but just not at design time. I place a breakpoint in the DefaultText set property code and it simply doesn't run.
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Apr 5, 2010
How do I set a User control (or a class with a few properties) to appear in the tan bar at the bottom of the Designer? I have tried googleing it but, I don't know what that bar is called (Kinda Hard to Google without know what to Google)
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Nov 6, 2008
I have my own class of graphic objects, and now I'd like to allow a user to right-click on one of those within the application and see a properties window. Is there a pre-built dialog or control for displaying properties at runtime? I'd like to have something just like the IDE properties window button for my application.
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Nov 25, 2009
What I've done is create a User Control Library (Project) and I've added a single User Control to that project. The control contains a single FlowLayoutPanel, and I created a Property on the control itself to pass the FlowDirection from the Control to its FlowLayoutPanel child.
Build, reference, component appears in the Toolbox and everything works fine, but the property on the control does not appear in the Properties window when I go to edit it at design time.
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Dec 1, 2010
is there a way to remove all the tabs on a page so that i can just bring back the one i want? this is for VB 2008 by the way.
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Dec 11, 2009
I would like to be able to set Control visual properties such as color, boarder, flat style, etc. on the base class of the control so that as I add new instances of the control, each instance inherits the visual properties of the base. I have tried using Application Settings but it appears as though I need to reference an application setting manually each time I add the control to a form. This is a Windows Form question.
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Feb 28, 2011
I tried it and get an error but maybe I'm tring the wrong way. Can a usercontrol inherate an application defined class ie.. could you inheritance a classic rect class into a user control to add the hight and width properties to the control without having to do all the coding all over again? Currently I just declair a private instance of the class within the control and then encapsalate. It would be nice if I could just inherit all the functionality of my classes into controls designed to implament the classes.
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May 25, 2010
Is there a possiblity by any chance that a blank row in datagrid will be remove? Let's say the datagrid has this kind of info :
Column 1 | Column 2 | Column 3
User 1 NY 290-5542
Null Null Null
User 2 CA 350-5555
Lets assume that row 2 has a data and I inputed the data in row 3, however I change my mind I deleted the data in row 2 and that will leave row 2 blank. Is there a method where I can remove the row 2. The first thing come up on my mind was use a timer wherein it runs all the time.
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Nov 6, 2011
I'm self-taught in VB.net, having been a VB6 developer for years. I'm now out of the field but I'm making a forms app that I need for my new business. I am using VB2008 Express, and I'll upgrade to later versions when necessary. Because I am self-taught I mostly work from examples and there's a lot about .NET I don't understand.
SITUATION:I've built a Usercontrol. (A custom datetimepicker which I call "datebox"). Then in my application project, I add it to the toolox, then plunk it on a form. It works great so I use it many times in my project, each time with a various properties. No problem so far.
[Code]...
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Nov 19, 2009
I have a application with a tabcontrol. I dynamically open new tabs on which there is a custom control which is made of a graph and a datagridview with data. I fill this from a csv file. when I open few tabs like this my application memory goes over 120 MB. When I remove the tab I call the dispose on the custom control and a dispose for the tab. But the memory stays where it was (120+MB). It goes down only if I minimize the program. And when I show it again its around 10MB.
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Mar 16, 2012
I have added controls to the form using a control array.. However, when I re-run it they stay and more appear. How do I get rid of the first set?
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Jun 23, 2010
Is there anyway that I can access all the properties of a control during runtime and
get their values. I dont want to specify the property name. I should get the all the
property names and their values. It is something like reflection namespace in VB.NEt
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Dec 30, 2008
I have a problem: I want to code a program which can get properties of controls in orther program or other project (VB.Net project). I don't know where to begin?
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Apr 6, 2009
i had designed a form with various controls added some days ago. Accordingly i had coded the controls. And today i didnt like the look and feel of the form, so i copied the controls for a while and then re-pasted it over a new control (panel). Now when i double click to see the underlying code of the control generates a new event. I mean i had a button as Button1 and its underlying code was under the Button1_Click event. But now its is like Button1_Click_1 which i dont understand. Is it due to formation of control array or what? I want the button to be remapped to Button1_Click event.
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Jan 12, 2012
I am able to bind my datasource to the textblock for the display text. However I would like to set the Fontweight to bold if the value of the checkbox foo is checked. I'm trying to use IMultiValueConverter to accomplish this, but have had no luck so far.
<CheckBox Name="foo"/>
<TextBlock Name="bar" Text="{Binding Path=Name}">
<TextBlock.FontWeight>
[Code]....
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Apr 16, 2009
In our IDE, for example, Visual Studio, if we display the properties of a System.Windows.Forms.Button control, we see some properties that expose anoter set of properties. For example: FlatAppearance, Font, Location, Margin, etcetera.I would like to do something similar in a custom control.I know the code behind is wrong, but here is an example of what I´m trying to do:
Public Class StateOfMyCustomControl
Public Enum EnumVisibility
Visible
[code]....
In my IDE, in the properties window of my custom control, I would like to see my property State, with the possibility of display it to set the properties Visibility and EventManagement.
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Jun 7, 2011
I have a blank winform. A textbox control with name textbox1 being added to the winform. During the form load event, I retrieve 2 string values from database and store these values into TextboxName and TextboxValue variables of string type.
I use TextboxName variable to store that textbox control name (i.e. currently TextboxName = "textbox1") and TextboxValue variable to store that textbox's text (i.e. currently TextboxValue = "Hello world"). My question is how to set the textbox1.text property without have to resort to following code:
If TextboxName = "textbox1" Then
textbox1.Text = TextboxValue
End If
how to set the textbox1.Text property without have to use IF...Then construct?
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Oct 27, 2011
I have several controls on a page that contain the word "DATE" in the ID. These are specific text boxes for dates only.
Here is an example of what I need to do for each text box control with "DATE" in the ID:
Birth_Date.Text = fnLib.formatDate(Birth_Date.Text, 1)
Anniversary_Date.Text = fnLib.formatDate(Anniversary_Date.Text, 1)
Rather than do this for every single control, is there a way I could do this in some kind of For Each Loop?
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Oct 21, 2009
adding the properties of a control to its parent? Without having to rewrite all the properties... For example, if I have an user control with a button inside, and I want to have the "text align" property of the button, in the list of properties of the usercontrol. If not, is there a way of making the child control of an usercontrol editable?
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Sep 3, 2009
Checking User control's properties?
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Sep 20, 2011
I've built a custom user control in VS2010, incorporating two datagridviews, and asplitpanel - The idea is that there is a "Main" datagridview control, and the second is an internally controlled grid that (when shown) displays the Columns which are set as invisible. This allows the user to drag the columns onto the main grid, in order to display the columns.This all works fairly well. I've set the modifiers property on the Main DataGridView to public, so that by and large, the developers can make use of the control just like a normal DGV (albeit with an extra level to the code).
I've also created dummy events for each of the events that the DGV normally raises, and pass them through the usercontrol, so that the developers can attach to the DGV events as normal. Again, this appears to work fine.Unfortunately, I've run into a problem. I'm trying to set the RowSizeMode to DisplayedCells (or indeed any value). If I try it in the designer, it appears to retain the change until I run the application, after which the property reverts back to normal.
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Sep 15, 2011
I'm wanting to dynamically create some controls relative to controls already placed on the forum at design stage, how do I find the locations of the controls that are already placed?For example, I have a label called lblDateTime, its location is (13, 167) and its size is (65, 13).In my code, I want to place a new label below this label.I've tried to set the location and size properties of the new label using the location and size properties of lblDateTime.Size works, no problem, but the location of lblDateTime always returns as 0,0.[code]I want to set lblMessage DateTime. Location to (13, 180), but I'm actually setting it to (0, 13)What confuses me most is that Me.lblDateTime.Size is returning the correct values, so it's not like my code isn't finding the control.
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Feb 16, 2010
i been trying to figure out how to get the control name and other properties of a dynamically created control. I have actually dynamically created a label andnamed it. how do i retrieve its name and other properties.?
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Apr 10, 2012
I want to do a class that have properties like font, which will have other properties, such as name, size, unit,bold.
<TypeConverter(GetType(ExpandableObjectConverter))> _
Class TestingClass
'Some property here
End Class
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