Questions on UI for WinForms Forum

1 answer

103 views

SelectedValue?

I bind the tree to a DataTable. Is there an equivalent of SelectedIndex / SelectedValue / SelectedItem in the TreeView? I found SelectedNode but it doesn't seems to have any property that give me the underlying DataRow represented by the node.

Treeview

answered on 04 Mar 2008

3 answers

206 views

decent samples

Hi,

I'm using win Q4 2007 and I'm looking for a decent sample that shows the classic use of toolbars with menus in winforms. E.g. implementing basic operations such as clipboard commands from tool buttons, displaying opened MDI windows in the Window menu. How to merge MDI toolbars

Also what the best practice for implemeting tool button commands - I see references to command bindings, and they look like a good way to implement commands (I don't want to handle individual toolbar click events).

I have to say that doc and samples are dissapointing.

regards,

Avner

Toolstrip (obsolete as of Q3 2010)

answered on 04 Mar 2008

3 answers

158 views

Crash with Tooltips and floating DockPanels

Hi,

I've curently have an application that crashes when a tooltip of a control is first displayed while it's parent dockpanel is floating, and then after it is docked and the tooltip is to display again, it crashes.

You can easily duplicate the crash by creating a form with a DockingManager and one DockPanel in the Designer. Add a label to the dockpanel and add a ToolTipTextNeeded EventHandler.

1. Float the dockpanel by either dragging it or using the drop down menu.
2. Hover the mouse pointer over the label to see tooltip.
3. Re-dock the panel.
4. Hover the mouse point over the label and crash

I noticed similar behavior when using a auto-hidden dockpanel in the floating dockpanel.

I'm not sure if this occured before the ServicePack that attempts to fix the DockPanel Leaking issue or not.

Thanks,

John

Dock

answered on 04 Mar 2008

1 answer

172 views

StackOverflowException

I have a MaskedEditor control, with the mask set as "0.9 Hours".

When I try to enter text into the textbox, it works fine for the first 2 digits. If I try to enter a third digit, then I will get this exception thrown with no stack trace:

An unhandled exception of type 'System.StackOverflowException' occurred in Telerik.WinControls.UI.dll

MaskedEditBox

answered on 04 Mar 2008

1 answer

939 views

multiline label

I feel stupid for asking but anyone know how to make a RadLabel multiline?

when I set MaximumSize.Width on an ordinary microsoft label my text wraps and all is well. on the RadLabel not such joy.

regards
ewart.

Label

answered on 04 Mar 2008

6 answers

273 views

Filtering On an Invisible Column

Just wondering if this is possible. I haven't been able to get it to work so far.

Also is it possible to hide the Filter row while still leaving filtering enabled, as i want to do all filtering programmatically.

Thank You

GridView

answered on 04 Mar 2008

1 answer

119 views

Automatic key-tips

In case there are no explicit key tips specified, ribbon bar assigns numbers to commands/chunks. It works well if number of elements to be accessed by key tips is less than 10 at each hierarchical level. However, when there is more than 10, ribbon bar assigns those above 9 key tips 10, 11 and so on. But these are not accessible by user, as pressing "1" will trigger element with key tip 1.

Maybe making those key tips over 9 be "01", "02", "001" etc., as "0" doesn't trigger any element and pressing 0, then 1/2/... would clearly distinguish the command.

RibbonBar

answered on 04 Mar 2008

8 answers

269 views

Updating numeric values fails

I got the gridview datasource set to my collection of objects. One of the values is a decmal field. It show just fine (using the datavalueformat functions). But when I try to change the value and it updates against the object I get this error:

Header: RadGridView Default Error Dialog
Text: The follosing error has occured in the RadGridView: System.ArgumentException: Object of type 'System.String' connot be converted to type 'System.Decimal'. etc etc

GridView

answered on 04 Mar 2008

1 answer

103 views

Rows not de-selecting

I'm using the following code to select rows in a control that I've derived from the RadGridView control that has already been populated with data:

    
            public void SelectRows(DataTable tbl)  
        
            {  
        
               foreach (DataRow row in tbl.Rows)  
        
                  this.Rows[_KeyMappings[Convert.ToInt32(row[_KeyMember])]].IsSelected = true;  
        
               if (tbl.Rows.Count > 0)  
        
                  this.CurrentRow = this.SelectedRows[0];  
        
               this.Update();  
        
            }

_KeyMappings is a Dictionary<int, int> that maps primary key values to row indecies, and _KeyMember defines what the primary key is. This works great, until the user tries to click on a row. I'd LIKE the selected rows to clear out (since the user just picked a new one), as the code above is simply for setting the start up state of the control from data, but they don't. When the user clicks a new row, any previously selected rows should become unselected.

GridView

answered on 03 Mar 2008

1 answer

179 views

Set Default Column Filter in Code

I'm binding a grid to a collection and adding only the columns I wish the user to see from that collection in code. I want to set the default filter for these columns to "Starts With". I see that there is a Filter.Function property if I bring up the the column collection through the gridview control properties but how do I get at it to set in code?

I would have assumed that I could have said something like:

MyGridView.Columns("EmployeeName").Filter...

but Filter isn't available there.

Sorry if the answer to this is obvious but I've only just begun learning to use the Telerik controls.

Thanks!

GridView

answered on 03 Mar 2008