Questions on UI for WinForms Forum

1 answer

268 views

How to create Custom Node Element in TreeView?

Hello,
I want to show large image in tree node and create border for node.
So I think, I need to create treeview custom node, am I right?
Please give me advice how to do, create custom node and do other things?

Please help me,
Thank you so much.
Myat Su

Treeview

answered on 22 Nov 2011

8 answers

863 views

RadGridView extremely slow

Hi,

I do a little tests with RadGridView and I have to say that the RadGridView ist extremely slow, especially the scrolling. I first added a DataTable object as data source with 130 rows and 20 columns. The application was running full screen with 1920x1200 screen resolution. Scrolling is nearly impossible, the grid takes 2 or more seconds to update the position of the rows. After that I added a List<T> with 500 DateTime objects to see if the problem lies elsewhere, but without success.

My computer is a Pentium Quad Code @ 2.8Ghz, 8GB ram, NVidia Quadro NVS. I know that the graphic adapter isn't the fastes in the world, but for scrolling a table it should be enough.

What can I do to improve the performance!? The problem is that our customers have way slower computers. So the RadGridView is not useable for me.

Thanks in advance

Martin Horst

GridView

answered on 22 Nov 2011

3 answers

268 views

How to set GrdViewComboBoxColumn by DisplayMember sorting?

Hi :

How to set GrdViewComboBoxColumn by DisplayMember sorting?

Now,I find the GridViewComboBoxColumn by ValueMember sorting.

Greetings!
Look forward to you!
Ajing

GridView

answered on 22 Nov 2011

3 answers

204 views

Numeric datatypes

I have noticed both in the demo and my own test code that if a property is any numeric type, the max value is 100. How do I control this?

Also, I noticed that on the validating, the data types of the OldValue and NewValue are not the same, e.g. OldValue is Integer but NewValue is Decimal.

PropertyGrid

answered on 22 Nov 2011

2 answers

129 views

[Solved] RadProgressBar passed as Byref fails

Hi,
I have a radProgressBar that I'm using in a sync component. I pass the RadProgressBar with a byref into the sync class expecting that when I update the Value1 parameter it will change the bar position.

If I set the Value1 field just before the sync command from within the form it works fine but if I try the same thing once in the sync component it doesn't update the field.

Now I thought that using byRef would work - it certainly used to.

Any pointers (pun intended)?

Regards,

Jon

ProgressBar

answered on 22 Nov 2011

5 answers

271 views

Q3 2011 upgrade problems

Hi,

I just installed the Q3 2011 and I'm having a lot of problems. My installation process was like this:
1. Uninstall prevous release (Q2 2011)
2. Install Q3 2011
3. Start VS - 2010
4. When I try to use the "Telerik|Radcontrols for WinForms|Upgrade Wizard" menu option I'm receive the following error message:
---------------------------
Microsoft Visual Studio
---------------------------
Object reference not set to an instance of an object.
---------------------------
OK
---------------------------

Any suggestions?

Francisco

General Discussions

answered on 22 Nov 2011

1 answer

112 views

Navigate through Radchart using Binding navigator

Hello,
I'm unsing the RadChart and it's very interesting. but sometimes my Rachart datasource has many datas and the XAxis can not display them all (of course, because sometimes more than a thousand chartitems are returned to the radChart).
So I want to use a bindingnavigator to navigate through them. is it possible? how?
Else, can you explain me another solution to navigate through my radchart when there is a lot of datas returned?

Thank you.

Chart (obsolete as of Q1 2013)

answered on 22 Nov 2011

3 answers

316 views

[Solved] How to capture Escape key before/after the RadTreeView exits the edit mode?

Hello,

Is there a way to capture the Escape key just before the RadTreeView controls exists the edit mode? We have a workflow in which a node can be added and the control is set to the edit mode, so the user is foced to update the node text. But if the user cancels editing by pressing Escape we want to remove the node and keep it if the user pressed Enter. Which we could do in the standard TreeView control by using the KeyPress event. But the RadTreeView does not fire the KeyPress event when it enters the edit mode. Is there a work around this issue or i will need to submit a feature request?

Thanks,

Grigoriy

Treeview

answered on 22 Nov 2011

1 answer

129 views

Different cell type in the same Column

Hi,

in the same column, I can have 2 different types of cells?

i have this need:

Col1 Col 2 Col 3
text text text
text text text
text text Image
text text Image

Thank

GridView

answered on 21 Nov 2011

3 answers

327 views

RadPageView Minimum Height Question

I have my RadPageView control setup as ViewMode "Outlook" in my winforms C# application. In my requirement, I have a limited space to display the control (about 600px of height). When the control has more than 5 pages added, the view panel (the open area above the page selectors) is made smaller and cuts off the content. I would like to know if there is a way to enforce a minimum height on this area so that the control will automatically collapse page selectors it cannot fit in this confined space. I need about 300px of height for each page.

I have already tried setting the MinimumSize property on each RadPageViewPage. However, when I do this, the page view page "bleeds" over the top of the page selectors. I was expecting the grip to automatically resize to allow for this minimum height requirement.

Please see the screen shots from my sample application attached.

Edit:
I am using the RadPageView control from Q2 2011 SP1

Update:
I was able to achieve what I was looking for using the following code snippet and calling it from the "Initialized" and "Resized" events. I would still like to know if the control already supports this without having to write this snippet.

private void adjustPageViewGrip()

{

RadPageViewOutlookElement viewElement = (RadPageViewOutlookElement)radPageView.ViewElement;

int minHeight = 310;

int itemHeight = radPageView.SelectedPage.Item.Size.Height;

int selectedPageHeight = radPageView.SelectedPage.Height;

if (selectedPageHeight < minHeight)

{

int hide = (int)Math.Ceiling((double)(minHeight - selectedPageHeight) / (double)itemHeight);

if (hide > 0)

{

viewElement.HideItems(hide);