Performance of a user control of many UI elements

Question

Hi,

I have  a WPF user control with few tabs and the tabs contains number of text boxes and comboboxes. I'm using MVVM and the business behind is optimized and fast.

Somehow it takes some time to load the control and the delay is within the Initializing. Is there a way to optimize this ?

Any advice is appreciated.

Thanks

Vipster

Answer 1

Hi,

I have  a WPF user control with few tabs and the tabs contains number of text boxes and comboboxes. I'm using MVVM and the business behind is optimized and fast.

Somehow it takes some time to load the control and the delay is within the Initializing. Is there a way to optimize this ?

Any advice is appreciated.

Thanks

Vipster

Hi,

Is there a way to virtualize as similar to virtualizing collection data , for UI controls or a technique like lazy loading ?

Thanks

Vipster

Answer 2

Hi Vipster,

You can dynamically add controls into tabs when TabItem selected as below method: 

In the TabItem’s PreviewMouseDown event (not MouseDown event, since MouseDown has its
default implementation), you can add something like:

StackPanel sp = new StackPanel();

//Add controls to the StackPane.

…

tabItem1.Content = sp;

If you
don’t want to load the content every time the user clicks it, you can cache it.
Simply change the StackPanel to a class field.<o:p></o:p>

private StackPanel sp;

This will
create a null StackPanel, so it won’t use memory if the user hasn’t clicked it.
Now in the event handle:

if (sp == null)

{

sp = new StackPanel();

…

tabItem1.Content = sp;

}

Hope it helps.

If you have any additional questions, please feel free to let me know.

Have a nice day.

---

Annabella Luo[MSFT]
MSDN Community Support | Feedback to us

Answer 3

Hi,

Thanks Annabella. Let me try this out and update you with the findings.

Thanks

Vipster

Answer 4

Hi Vipstercular,

Haven't heard from your for a week, so we are temporarily marking this as "Answer", if you have any concerns or new findings; please feel free to let me know.
Best regards.

---

Annabella Luo[MSFT]
MSDN Community Support | Feedback to us