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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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.)
View 3 RepliesI have a UserControl that contains other controls that I would like to be able to rearrange or resize at design time. So I have a custom designer for the UserControl that inherits from System.Windows.Forms.Design.ParentControlDesigner, and I call EnableDesignMode on the child controls from within the designer. That way, at design time, I can drag and drop the child controls to move them, or resize them. But I can also drag and drop the child controls somewhere else on the form that is outside of the original UserControl. Is there a way I can limit the child controls from being moved or resized outside the UserControl?
View 1 RepliesI have a document with VBA controls in it that I created in MS Word 2003. After migrating to MS Word 2007, I get the message that "Can't exit design mode because control 'lblEmaillist' can not be created".
After reading through the various forums here and on microsoft.com it seems to be a known problem. I looked at these articles but am still having a bit of trouble...
[URL] refers to the same problem in word 2000 but after following the directions I still am getting the problem.
The problem does not occur when I open the document in MS Word 2007 or MS Word 2003. The problem only occurs when I open click on the link from IE.
I've set up the location as a trusted location in Office 2007 settings so that should not be an issue.
The document in question is being saved in the word 97-2003 format due to the fact that some people here have not upgraded to office 2007. I tried saving it as a .docm for office 2007 but the error message still came up.
I have created a custom Combobox and added it to my toolbox, and it works well. Now I have added a custom ListBox to the same file as the combo box, but it does not show on my designer when I place it. I can however add it at runtime.
''ComboBox
<DefaultEvent("SelectedIndexChanged"), _
ToolboxBitmap(GetType(System.Windows.Forms.ComboBox))> _
Public Class ProjectsComboBox
Inherits ComboBox
''My Customization
[Code] .....
I have tried removing the "DefaultEvent..." and still no dice.
I'm looping through an array of controls and need to know which controls an end-user has the ability to (via JavaScript or directly) change the value that gets posted back. Where can I find such a list?
So far I have this:
Private Function IsEditableControl(ByVal control As Control) As Boolean
Return TypeOf control Is IEditableTextControl _
OrElse TypeOf control Is ICheckBoxControl _
OrElse GetType(ListControl).IsAssignableFrom(control.GetType()) _
OrElse GetType(HiddenField).IsAssignableFrom(control.GetType())
End Function
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..
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?
How can I force a program that is executed though VB into windowed mode?
View 1 RepliesIn my Form I have the Tree View in which I want to Add the Node during the Run time.
For that I used a Context Menu Strip and on the Click of the Pop menu I added the new Node.
but my problem is my newly added is not editable by default
but instead I need to select the newly added node and after selecting the node I again need to click the Record to Edit it.
So is there any way that newly added node will be added Editable?
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.
View 2 RepliesIn a user control I have the code shown below.
I now realize that it is incorrect because the container's InitializeComponent property initializations have not run yet and they must be run prior to Refresh being called.
How (where) can I run Refreash after the container has initialized this user control.[cod]e...
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]...
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.
View 3 RepliesI 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.
View 1 RepliesI have a base form class that is providing a new property that looks Like this
Public Class BaseForm
Private _HappyTime As Boolean
Public Property HappyTime() As Boolean
[Code]....
Now when I inherit the BaseForm on a new form, the HappyTime property displays in the properties window as false, and is uneditable.
I've recreated this BaseForm and Inheriting Form in an entirely new soloution and, the HappyTime property is editable and works as expected. For some reason in the existing project (where these changes need to be made) it's not behaving properly.
Environment Information: .Net Framework 3.5, Visual Studio 2010, Win7 x64
This is a related to my last post, but not enough to make sense as a tag on question.I have a collection(of myClass) that is exposed as a public property in a user control.When I add an item to the collection in code I would make the call collection.add(new myClass) and of course the constructor for myClass is called.When I add items to the collection via the design time menu the constructor for myClass is not called.... of it it is called, I can't see any evidence of it.
View 3 RepliesI'm trying to make a simple User control that houses one collection of a class that I've made. After building the control All works as planned and then randomly when I try to go to the design time interface for the form I placed the control on I get an error page with the following:
To Prevent Possible data loss before loading the designer, the following errors must be resolved:(ignore and continue: which about half the time works and the control shows up and the other part of the time all of the controls on the page are missing)
The one error is the following:Object of type'System.Collections.Generic.List'1[StaticGraphPlot.clsStaticCurveData]' cannot be converted to type System.Collections.Generic.List'1[StaticGraphPlot.clsStaticCurveData]'.
[Code]...
I've created a user control that is basically a Panel that contains 1 label,3 TextBoxes and a few properties that set/get some short integer values.During a form load event I display a number of these Panels.I then access the Panels name (and other panel properties) via a user-created handler for the panel's click eventHowever I would really like to access the values from the user-control's properties.
Public Sub load_Panels()
Dim pnlName As String
Dim x As Short = 69
[code].....
In the form design I set up a TableLayoutPanel, 20x20 cells and in cell (1,1) a PictureBox (called Target) containing the image of a small target. The properties box for Target shows some very promising properties, Column and Row - and if you overwrite the values in the properties box, the PictureBox obligingly shifts to the corresponding cell position in th design. However in VB it is not possible to refer to Me.Target.Row or .Column - neither appears during coding in the menu of properties, and deliberately coding either of them produces an error like
Error 1 'row' is not a member of 'System.Windows.Forms.PictureBox'.
1. Why does the properties box show properties that cannot be altered programmatically?
2. How can my program move Target around in the TableLayoutPanel?
I have created a user control that mimics what a label does. I realize I could have inherited the label control, but I am working on understanding the process. I wish to add items to the control. normally (in the code of my project) would do:
Form1.Label1.Controls.Add(mylabel)
After creating mylabel in the code of course.
[code]....
I have a UserControl class in a Windows Application project. One of the properties of it is a collection of another class that I have defined. I can't seem to find a good example of how to get the standard collection editor working for it at design time.I got it working using some example code I found to a degree, but the data in my collection doesn't get saved. When I exit the form and open it back up in design time the data isn't there any more.Here is my class:
Public Class Gauge
Inherits Control
Private WithEvents _Captions As New CaptionCollection
[code].....
I am creating a user control that contains a panel as well as 4 string and integer properties. I would like to display the text of the properties in the user control during design time.
View 3 RepliesI am creating a User Control where I have a property called Items. Items is of type LibraryPanelBarItem Collection (custom class) which contains a collection of LibraryPanelBarItem objects. I would like to be able to add these at design time by using the Collection editor that VS uses for adding things such as treenodes/listviewitems. Ideally I would also be able to declaratively add them to the html syntax. I can get the Items property to show up but I get no intellisense to add the items between the opening and closing tags. [Code]
View 1 RepliesI have a usercontrol which overrides the property Text. But this property is not shown at design time.If I rename it to caption or value it is shown in properties at design time but Text is not shown.
public Class SomeControl
Inherits System.Windows.Forms.UserControl
Public Overrides Property Text() As String
[code].....
Checking User control's properties?
View 4 RepliesI'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.
I am opening a form with a user control with some code like this:
Dim Frm = Form1
Frm.UserControl1.Property2 = Value
Frm.Show
[Code]....
In my asp.net 4.0 application I have a standard set of tabs controls across the application that has one tab for Search, one for View and one for Reporting.I am in the process of updating those tabs and I was hoping to be able to wrap their functionality up into a single user control since they all function in pretty much similar ways. The issue I am having is how to create a property called SeacrhTab/ViewTab/ReportTab that allows me to assign a different user control to it depending on the area of the application (e.g. CompanySearchControl, ContactSearchControl, etc.) Anyone ever tried to accomplish something similar?
View 2 RepliesI've got a VB.Net form application that dynamically loads user controls based on which navigation link the user clicks on. I'd like to make it easier to use at Design time by putting a link of some sort to open the User Control at design time. The link would go onto the form in the space where the User Control will be going. This just saves a little time from having to browse through the files to open the correct file.
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