I'm using tabControl with many tabs(>10), and each tab has UserContol. But tabs Initialize each control at starting my app. It's making my program too slow. I want to run my userControl only when I click on it. How can I do this?
You should improve your UserControls that they do not do the performance stuff until they get activated/visible. Give them a method Activate which the tabcontrol calls when the tabs becomes the selected tab.
Alternatively you could not add the UserControls to the TabPage content in the designer. Instead create your UserControl when the tab becomes active. But this will make them insivible in the Designer.
You could either have a marker such as IsLoaded and until a tab is selected, not load the controls. When the tab is then selected, if it hasn't already been loaded, you could load the controls and add them at runtime to the tabs Controls.
Or, you could have the controls added but not do anything with them until the tab is selected, and then each tab will do the calculations or whatever and update the correct controls.
It's all about your design.
Add a handler to your UserControl's Load event. Then kick off slow activity in the handler.
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For an error validation mechanism, I've to be able to "navigate" in my application to one specific pane.
Currently I've one "SelectedNode" and tries to focus the control that is bound to this property(basically, I've an AttachedProperty to set the IsFocus, based on the name).
My issue is that sometimes this page contains tabs. And it appears that the control cannot be focused if it's hidden(not in the active tab).
Is there a way from an UserControl to go up in its visual tree to "activate" all his parent?
I cannot just bind the "SelectedIndex" of my tabcontrol in the viewModel, for a lot of reasons:
The UserControl that has the tab has one sub user control for each tab, so the usercontrol doesn't know what is in which usercontrol
Putting such things in the ViewModel is wrong, the ViewModel should not have to know that it's displayed in tabs or all in the same pane
Thanks!
I am creating WPF application that utilizes a simple navigation menu. When one of the menu items is selected, I want a grid control with buttons to become visible.
I have 3 items on my navigation menu. For purposes of speed and better coding practice, is it better to have 3 seperate grids and they all are visible until the button is clicked and one becomes visible or is it better to have just one whose content gets changed depending on what button is clicked?
I'd prefer to use a container control (e.g. ListBox) instead of a grid. This way you can bind one of your three menus to this container control's DataContext, depending on the button clicked.
If your menu entries are static you could also use a content control and change the ContentTemplate. All three neccessary ContentTemplates can then be defined in XAML.
I want to load a new layout (just like we do in Android programming as layout1.loadLayout()) in C# when a button is pressed?
How can this action take place when a method is called?
If I am not clear in my question, I am looking to load a new set of controls and hiding the current controls temporarily on a window form when a button is clicked (while they should retain their current properties, so that if I go back they should be in the same way where I left them).
How can I jump between different layouts while not completely deleting and creating them again and again?
if this is for a desktop app, look into user controls.
info here
You could create panels to group controls and toggle it's visibility.
Look for panel control in components, then add controls to it, toogle it's visibility.
I have thought of this idea where you could have a tab control on a form, but instead of defining each tabs controls before runtime, inherit or use another form's controls.
Basically a tab control is in place on the main form that has no tabs on it before runtime. When runtime comes along I want to create tabs, but the controls that would be on each tab would be from seperate already created forms.
Each form would be a seperate tab that had been created prior to runtime.
Is this possible? Is so, how?
Thanks in advance
EDIT
I'm using 3.5
first create a User Control and design it as you would a regular form, then add it to your TabControl.TabPages
TabPage page = new TabPage("Title");
page.Controls.Add(new CustomUserControl()); //your user control
this.tabControl1.TabPages.Add(page);
If all you'll be doing is copying controls from a TabControl on one form to a TabControl on another form:
Instantiate the form you want to copy from
Find the TabControl on that form
Iterate through Controls on the TabPages inside that TabControl
Add each Control you find in that collection to the tab(s) in the control you want to copy to
Close and Dispose of the form you created in step 1
Yes, it is possible. You have to add the controls onto the TabPage, then add the TabPage to the TabControl.TabPages
I have a WPF tabcontrol with 3 tabs. On the top of the first page is a scrollviewer with a couple buttons which make up a menu of common tasks (save, load etc). I would like this scroll viewer to appear at the top of every tab. Is it possible to do this without simply copying and pasting the code to every tab?
You can make a custom control that contains the UI and logic for the buttons, and then include that control on each tab. The best way to do this is to create a subclass of ScrollViewer, and in the XAML define each of the buttons. On each of your tab pages you can create and create an instance of your new subclass.
This will result in a different instance of your class on each page, but the logic for the buttons will only exist in the code once.
You could implement the scroll viewer and buttons outside and on top of the tabcontrol.