Hello, I have some problem with my vb.net interface, I need to add dynamically in a window several controls with a label (textbox,combobox,datetimepicker), for an advanced search, controls could be more than 100, depends, the big problem is that everything is very slow, it take 5 seconds or more to create it, there is any way to speed up the process ?

I tried with double buffer but nothing change

Hello, I have some problem with my vb.net interface, I need to add dynamically in a window several controls with a label (textbox,combobox,datetimepicker), for an advanced search, controls could be more than 100, depends, the big problem is that everything is very slow, it take 5 seconds or more to create it, there is any way to speed up the process ?

I tried with double buffer but nothing change

multi thread? Have multiple threads invoking a method that adds controls?

at moment I use a new thread to populate the window with all the controls, this avoid to freeze the window, but does not help much in performance

I will try with pooling and with something custom control, I also see that the combobox are much slower than the textbox...

There is any way to build this control in some background thread during application start up and clone it every time i need it ?

my application have tabControl so I can open advanced search also in two o more tabs...

You could always put the control into a DLL and run NGEN on the assembly.

But, I think the real problem is that you could just simply have way too many controls ("over a 100"?), which will only create future problems.
If you need to display a lot of data couldn't something like a custom DataGridView be used?

But, I have seen applications where "custom rows" are defined as custom controls, and then stacked up to give the appearance of a DGV.

Rudedog =8^D

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Mark the best replies as answers. "Fooling computers since 1971."

I agree 100 controls is way too much. Even if it wasn't slow to create, do you expect the user to even find a filter easily with even 30 controls? I suggest you moving away from that design and and having something like a drop down for the user to select what they want to search by, control by control, and then add these controls after the user makes their choice, control by control, choice by choice.

As for loading it in the background, how about having a loading screen instead? Many applications use a splash/loading screen if it takes time to load.

Hi Beppe,

> for an advanced search, controls could be more than 100

Do you need to read any data from database while form is loading? I think that will affect the loading speed. Since your form is for search purpose. Why not group the functions and make some form for different search requirement?

Sincerely,
Kira Qian

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