Silverlight: Hide Objects/user Controls Within Wrappanel?
Mar 5, 2012
I've got a WrapPanel which will contain several different custom UserControls. Depending on the scenario, I may need to filter down which UserControls are visible. My goal is that I can switch which controls are visible on the fly by showing/hiding the controls that need to be filtered - thus shifting the controls that are left showing, to the top-left of the panel.
Right now I am simply setting the Visibility property of the control to Visibility.Collapsed when I don't want them to appear. I thought that because I was using a WrapPanel, the rest of the controls would shift to the top-left of the panel.Instead, after hiding some of the UserControls, the controls that are still visible stay exactly where they were before, and I am left with gaps between the controls that are still showing. I've opened my app in Silverlight Spy, and it shows that the UserControls are still actually there (which makes sense) but are simply invisible.
So my question is: Is there a way that I can show/hide UserControls within a WrapPanel which allows the still-visible UserControls to slide to their new positions (all shifting towards the top left - similar to a StackPanel)?
I've debated removing the UserControls completely from the WrapPanel (I think this would work) and storing them in memory until they are needed. Then if I wanted to show/hide other controls, I would get them from my in-memory object. It seems like there should be a better way to do this though.
UPDATE:
XAML: (very simple)
<toolkit:WrapPanel x:Name="MyLayout" Height="300" HorizontalAlignment="Left" VerticalAlignment="Top" Width="400" />
Code-Behind: The UserControls are getting added dynamically:
MyLayout.Children.Add(oUserControl)
And they are getting set to collapsed dynamically as well:
oUserControl.Visibility = Visibility.Collapsed
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Aug 11, 2011
Silverlight project with tabcontrol hosting canvas objects. I want to wrap my entire tabcontrol with a scrollviewer so that on a short display you can scroll vertically to see the whole area on my canvas.When I run my project my scrollviewer vertical bar is always showing even when there's more room vertically than needed for a scrollbar.
All I am trying to accomplish here is a min resolution of 1280x768 to be scrollable and anything bigger than that have the scrollbars hide. My laptop is only 768 tall, but my canvases were developed with 1280x1024 in mind. So I would like a way to set this up so that everyone can scroll or just see the canvas all at once depending on their resolution.
Anyone have any ideas why it is always visible? I've tried setting canvas width and height. I tried setting stretch on alignments on the outer grid. Saw both those tips while searching other issues similar to mine.
Some code:
<Grid x:Name="LayoutRoot" MinHeight="768" MaxHeight="1024" MinWidth="1024" MaxWidth="1280" Background="#FF6A6868" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="0.775*"/>
[code]....
....lots of child canvas items in my "Main Floor" canvas. Child canvas objects contain lots of path objects. None which are taller or wider than the main floor canvas width/height.
<sdk:TabItem Margin="0" Header="Mezzanine">
<Canvas x:Name="Upstairs" HorizontalAlignment="Left" Height="1000" UseLayoutRounding="False" VerticalAlignment="Top" Width="1280">
..another tab. Same deal with child canvas objects.
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Feb 8, 2012
I have a couple of user controls, which I show in my main form.
So let's say here's what i want:
Sub Show_Control1()
UserControl1.Show
'CODE TO HIDE EVERY OTHER DISPLAYED USER CONTROL ON THE MAIN FORM
End sub
Right now I have to hide them one by one with hide, because I don't know what's the current displayed form.
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Oct 24, 2009
I'm developing a Silverlight application where I want to simulate a console. There are a lot of ways to represent this - StackPannels, grid of TextBoxes, etc - and I was wondering what the bets fit would be?
Display an 80x20 grid that scales based on parent size Be able to update an individual cell's character Be able to set a cell's forground and background color
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Jun 10, 2011
I may have mentioned it before but I can't find a thread in this forum where I may have previously mentioned this!!
[Code]...
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Jan 6, 2011
I want to let the user input objects to a richtextbox 1 object on each line, and somehow use Random.Next to select pseudorandomly a few objects, the number 'few' inputted in a textbox.
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Jan 9, 2012
I want to display data with level of detail, so i use a TreeView, but each detail is quite short, so i would like to use a WrapPanel (horizontal) to have many details per line.Something like :
This is an unexpanded item
This is The Header of an expanded item
Info 1 Info 2 Info 3 Info 4
[code]......
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Oct 24, 2010
Is it possible to hide all controls in a groupbox using code?
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Aug 2, 2010
I have a bunch of custom controls I've made - and these are by default added automatically to the Toolbox. A nice feature. However, I want to hide certain controls from the toolbox. Is there a way to do this?
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Aug 23, 2011
There is newer code in a follow up post. I suggest using the code in the later post rather than the code in this one. You can still read this post though. When designing a user interface, one should be conscious of how many individual controls are required to implement the functionality. In some cases an initial design may begin with many buttons or textboxes (for example) but then further review of
the actual required functionality allows for a reduction in the number of unique controls.
But other times, there isn't a better way (which will still make sense to the user of the application) then to have a series of many repeated controls. So in the cases where one can be certain that the best UI implementation for an application will require the use of multiple copies of a given control, then it often becomes necessary to maintain some method of managing all of those controls at various points
throughout the application. Doing so typically requires that one build up some collection of controls which can then be accessed by index in order to work with any given control; but this can lead to a lot of clutter in the code file which handles these control's events. For instance there will be some kind of collection declaration, some recursive routine to find all of the controls of interest, and then any number of event handler methods with long lists of Handles clauses, or additional code loops to wire up the event handling for each control.
Purpose Since most of this functionality could be considered a requirement regardless of the type of control being managed, or its required functionality, it may make sense to wrap all of the control management functionality into a single class. And since our first requirement is a collection of controls, then a base collection class could be the perfect starting point for our control manager. There are a number of existing thread around this topic, with some recent (at the time of this writing) ones being:[URL]..In this, and related, threads I have posted examples of a simple TextBoxManager and ButtonManager control. But again, with so much similar functionality required regardless of the control being managed, it would be technically possible to create a generic ControlManager(Of T As Control) class which can manage any type of control.
[Code]...
So in summary, one can facilitate managing a large number of user interface controls by building a "control manager" class which both encapsulates the list of control instances, and deals with adding and removing defined event handlers for every control it manages. The generic control manager class itself can be inherited and extended into a more specific class on a per-application basis in order to provide more application-specific functionality. Reed Kimble - "When you do things right, people won't be sure you've done anything at all"
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Apr 8, 2010
Is there any examples with a treeview like this [URL] /scree...tinel-smod.png is it a case of having to draw each form how you would like to then hide/show the controls depending on what is selected in tree view????
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Mar 19, 2009
I have a LOB app written in VB.NET with a WinForms front-end and SQL back-end. After many months weighing up how to get onto the Web, I decided last month to use Silverlight 2. Now, Silverlight 3 Beta is out, but there is no end-user runtime.
Does anyone know when the runtime will be available for deployment of SL 3 apps onto client sites?
My dev timeline is about 3 months: should I persist with SL 2 and then u/g to SL3, or jump straight in to SL3?
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Sep 27, 2011
I have some custom user controls in my .net winforms program that do not display correctly when the user has selected larger text size. This setting:
My controls look like this:
Instead of like this:
The bill to area and ship to area are both custom controls. I don't know if this is contributing to the problem but I do have code in each to scale the phone/fax areas to stretch nicely, like this code from the bill to control,
Private Sub panFaxPhone_Resize(sender As Object, e As System.EventArgs) Handles panFaxPhone.Resize
panFax.Width = (panFaxPhone.Width / 2) - 1
panPhone.Width = (panFaxPhone.Width / 2) - 1
panFax.Left = panFaxPhone.Width - panFax.Width
End Sub
How can I get my controls to size correctly while still respecting the users choice for larger text (I don't want to just set the AutoScaleMode to None)? After playing with this for a long time it seems to be a problem with anchors in the child controls. See this below image, the inner black box is the control with its border turned on, the text boxes (like name) are anchored left and right and should stretch to fill the control, but don't.
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Jun 2, 2012
i have a windows from project and in that project i created a user control lets call itcustombutton1 now i can use that control quite easily either at design time or runtime by creating a new instance of it like
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Mar 8, 2011
I have created a desktop application in vb.net 2005. I have added some custom .dll(s) in my project. When i deployed the application on users computer i see that dlls are present in bin folder of the application. When i remove those dlls the project failed to run. Is there any way that i can hide these dlls from users directory.
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Apr 29, 2010
We have a ASP.NET web application written in VB.NET where we build content programmatically during the Init event.We make extensive use of user controls, building them on the fly, and I now want to start including SilverLight content.Is there an easy way of embedding a SilverLight application in a control, and then instantiating the whole thing in code, in the same way as you'd programmatically add ordinary ASP.NET controls to a page?The SilverLight component itself works fine when added to a page using the <object> tag but I really want to be able to reuse it elsewhere in code.Since I'm expecting use of SilverLight to increase in our application, and the asp:Silverlight control seems now to be deprecated, I'm looking for an alternative way of wrapping the content.
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Dec 2, 2009
How many controls can I have before I should start looking at user defind controls because of too many controls making my program go slow?
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Jan 29, 2012
I want too allow my users to be able to choose wether they SEE VISUALIZATIONS in the player in my app when listening to Audio through the Player. Also, how doo I let them choose different visualizatins for the player?
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Jun 6, 2012
I want to hide the user control in asp.net, and remove it's space .. how ?
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Nov 28, 2011
How do you hide a user control when a button is clicked? I know how to hide a form but not a control. If it is possible to actually remove the usercontrol from the panel that would be awesome to and then have it show again once I click the other Icon. [cod]e...
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Oct 6, 2011
I've spent three days trying to get a user control to do some obvious things -- show, hide, and focus among other things. Done in vBASIC in Visual Studio 2010 Pro. The calling program is a Windows Forms Application, while the user control is a WPF Custom Control Library with a single object, a textbox. The reason it's a user control is that this textbox is connected to an async serial device; the reason it's in a Custom Control Library is that I'd like to be able to drop this functioning serial-port-connected textbox into future projects.
No matter what syntax I attempt, the user control (neither the control nor the text box inside it) will Hide(). I've tried every variation I can think of with control.Visible = false, exposing public subs to do the work, etc. When the form appears and characters are typed in the field, the KeyPress routine is functioning -- it will only accept numeric digits.
Here's the vastly reduced code to illustrate the problem:
Calling Windows Forms Application
Imports DTRFormsControlLibrary2
Public Class Form1
[Code]...
In spite of the call to sbControl.Hide(), the form opens with a very visible and enabled user control text box. The ability to control visibility, focus, and enable/disable seems fundamental to any control.
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Dec 9, 2009
I've spent three days trying to get a user control to do some obvious things -- show, hide, and focus among other things. Done in vBASIC in Visual Studio 2010 Pro. The calling program is a Windows Forms Application, while the user control is a WPF Custom Control Library with a single object, a textbox. The reason it's a user control is that this textbox is connected to an async serial device; the reason it's in a Custom Control Library is that I'd like to be able to drop this functioning serial-port-connected textbox into future projects
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Dec 25, 2011
I am trying to show or hide tabpages as per user choice. If user selects gender male then form for male in a tabpage "male" should be displayed and if user selects female then similar next form should be displayed in next tab "female" I tried using
tabControl1.TabPages.Remove(...) and
tabControl1.TabPages.Add(...)
It adds and removes the tabpages but doing so will loose my controls on tabpages too... i can't see them back.
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Jan 24, 2011
Does vs2010 have this under a windows form?I have a text field that i want to show/hide depending if the user wants to view it. Like vista does "show more information"
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Apr 18, 2012
I have a simple web for that has a dropdown list and a button on the form.The dropdown list is bound to a table in my database and holds three values with idents between 1 and 3 (Weekly,Monthly, Please Select).I have set my datasource to pull back item 3 (Please Select) as the first item in the dropdown list to prompt the user to select an option. Items 1 & 2 have data assigned to them and this pulls back the relevent data for these options.
Here is my problem. I need to hide my button when the page loads until the user selects item 1 or 2 and would like the button to be hidden of option 3 is selected. I have tried to complete this in my page load event and the code for the dropdown list but i cannot seem to get this to work.
If IsNumeric(DropDownList1.SelectedValue) = 3 Then
btnAddAgendaTemplate.Visible = False
End If
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Aug 16, 2010
I'm redesigning an old VB6 application into VB.net and there is one thing I'm not sure on the best way to do. In the VB6 application whenever we created a new instance of a component, we would pass in the user details (user name and the like) so we new who was performing the tasks. However, no that I'm redesigning I've created some nice class designs, but I'm having to add in user details into every class and it just looks wrong.
Is there a VB.net way of doing this so my classes can just have class specific details? Some way so that if my classes need to know who is performing a task, they can get the information themselves, rather than having it passed in whenever the objects are created?
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Jan 4, 2010
I've got a website and we just had a huge jump in traffic. Now all of the sudden we're getting sql parameter errors left and right. We switched to a new sql server a few weeks ago and everything has been fine but the added traffic seems to be breaking us.I have a data access class that is called when each user trys to logon. It runs through several tasks before finally updating the users last login date and forwarding them to the administration section.
What I'm seeing from the trace logs suggests that when I'm logging in the first several tasks are using my data (lets say user=birk pass=word). But at some point the accessor class starts sending over the data from someone else who's trying to login (lets say user=abcxyz).Every connection we make to the server is closed when we're finished with it. I'm nulling out all of the accessor objects when I'm finished with them. But somehow different user data from different sessions are making their way into other peoples instances of the object.
I'm not using session/application/cache/viewstate to store the objects so I'm not really seeing how they could edit eachother... Its just really weird and I'm not sure how to even go about researching the problem.This is roughly the accessor class... I trimmed out some of the parts that weren't reliant to the issue
Imports Microsoft.VisualBasic
Imports System.Data
Imports System.Data.SqlClient[code]......
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Oct 16, 2011
I'm trying to bind a WinForms TreeView control to some user-defined objects. In particular, I'd like to bind aTreeNode.Text property to myObject.Name. My strategy is to create xTreeNode, a subclass of TreeNode, add a DataBindings collection, and expose its Text property. This would allow me to write some code like this:
Dim oBinding as Binding
Dim bs as New BindingSource
bs.DataSource = myObj
[code]....
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May 5, 2012
I'm curious if it is possible to hide a group of text boxes from view in a form until a particular condition is met, and to have a custom set of text boxes for that condition. To give an example; I want radio buttons offering choices for a manner of searching records, the user selects one and then a specific set of text boxes are displayed for the user to utilize, if a different option is chosen a different set of text boxes will be shown. Is this something that can be done?
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Feb 13, 2010
When I add my user control to a flowlayoutpanel its going left to right even though the flowdirection is set to TopDown
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