Questions on UI for WinForms Forum

4 answers

302 views

Obviously, changing

comboBox1.MultiColumnComboBoxElement.DropDownHeight

doesn't do the trick. I've tried various things but with no success?

How can I set exact height of dropdown? It'd be nice if I was able to set height of dropdown by specifying number of rows to display.

Regards,
Daniel

MultiColumn ComboBox

answered on 11 May 2009

3 answers

194 views

Acces to listbox in Panelbar

I am using the following code to build a PanelBar from a database table. For each "FileType" I add a panel and place a ListBox in the panel. This works just fine.

    
                        For Each itemFileTypes In collFileTypes 
        
                            If itemFileTypes.IsInUse Then 
        
                                Dim newGroupElement As New RadPanelBarGroupElement 
        
                                newGroupElement.EnableHostControlMode = True 
        
                                newGroupElement.Caption = itemFileTypes.Descr 
        
                                Dim lst As New RadListBox 
        
                                lst.Name = itemFileTypes.Descr 
        
                                lst.Dock = DockStyle.Fill 
        
                                lst.Text = itemFileTypes.Type 
        
                                newGroupElement.ContentPanel.Controls.Add(lst) 
        
                                radPanelBar.Items.Add(newGroupElement) 
        
                            End If 
        
                        Next 
        
                        radPanelBar.Dock = DockStyle.Left 
        
                        radPanelBar.ThemeName = "ControlDefault" 
        
                        ' Set focus to Log panel 
        
                        radPanelBar.Items("Log").Focus()  ' This throws exception

Later in my code I need to access the ListBox to assign its DataSource and load the appropriate data into each ListBox.

    
                    ' For each panel find the listbox and assign its DataSource etc 
        
                    ' add a listbox event handler for SelectedValueChanged. 
        
                    Try 
        
                        Dim pnl As RadPanelBarGroupElement 
        
                        For Each pnl In radPanelBar.Items 
        
                            Dim lst As RadListBox 
        
                            'newGroupElement.ContentPanel.Controls.Add(lst) 
        
            ' This is where I come unstuck! 
        
                            lst = pnl.Items(0)  or  pnl.ContentPanel.Controls(0) ???

                            With lst 
        
                                .ValueMember = "id" 
        
                                .DisplayMember = "FileDescription" 
        
                                .DataSource = GetFileNamesByType(CType(lst.Text, Integer)) 
        
                                '.EmptyRows = True 
        
                                AddHandler lst.SelectedValueChanged, AddressOf ListBoxSelectedValueChanged 
        
                            End With 
        
                        Next

See where I come unstuck above. What am I missing?

'newGroupElement.ContentPanel.Controls.Add(lst)

If I added a listbox to the controls collection of the ContentPanel of the GroupItemElement, why can I not access the ContentPanel of the GroupElement?

e.g.

lst = GroupElement.ContentPanel.Controls(0)

Declan

Panelbar (obsolete as of Q2 2010)

answered on 11 May 2009

5 answers

162 views

windows contextmenustrip on radtreenode

Good morning Telerik Team,

I'm wondering if it's possible to use a Windows ContextMenuStrip on RadTreeNode control. I see it's possible to use it on the Radtreeview control, but I need context menus on the RadTreeNodes too.

Thanks,

Teba.

Treeview

answered on 11 May 2009

1 answer

156 views

CSLA - RadGridView - NewRow and Grouping

Hello,
We are evaluating the WinForm controls and have downloaded the free trial. We are also using custom business objects based on Richard Lhotka's CSLA framework. We have run into some issues with regards to the RadGridView.

1. The RadGridview is bound to a BindingSource control which in turn is bound to our business object. With regards to adding new rows via the RadGridView, we had to override the AddNewCore method that elimiated one of the errors the Grid reported. Now the New Row is displayed but there is an issue with the behavior of adding records. If you set a value for one of the cells of the new row and press the Tab button to proceed to the next cell of the current record, this will create a new record instead of continuing editing the current record.

2. When Grouping by a column is there an event that we can tie into or override a method? Currently we recieve an InvalidCastException when the Grid tries to cast the field to a type of System.IComparable.

Best Regards

GridView

answered on 11 May 2009

3 answers

237 views

Gridview Update

I have an unbound gridview and the data behind is update constantly. What is considered to be the best method to update data in the gridview? Which will have least impact on performance?

GridView

answered on 11 May 2009

4 answers

292 views

Clicking a row triggers the Cellformatting event to fire.

I'm not sure if im using the correct event but let me explain whats happening.

i have a gridview control which display data/images. When a image is changed it fires the cellformating event to play a audio sound, but when i click on the row or cell on the grid it fire the cellformatting event again. Why is this happening?is this by design. I only want to play the audio when the image value changes.

Thanks in advance!

GridView

answered on 11 May 2009

5 answers

211 views

RadDataGridView

Hi.
I'm new with this product and I have some problem with RadDataGridView
1. When I define more than 21 columns, I can not choose the columns 21 and more to set their property.
2. Some time (not always) I can not add more than one column to the Grid (when I open "Open Property Builder"). I have to click OK and open it to add another column.

GridView

answered on 11 May 2009

2 answers

283 views

[Solved] Loading multiple themes for similar controls

Hi,

Ive got a complex MDI application which Im trying to theme. Ive tried a few different ways to create multiple themes that the user can chose between and the only way I can get it to work is if I create a ControlDefault theme for most controls, and any controls that need to be different, like panels that need to show different colours I create a separate theme file and set the ThemeName property on the panels to match up the the correct theme. Then to swap between themes I have a different set of files with the same ThemeNames.

This works great, but I cant figure out how to unload a theme, also if I have 2 themes, light and dark and the form loads with the light theme, then I set it to dark, if I try to set it back to light it wont apply. How can I unload the theme, or properly switch between themes?

To load the themes Im using ThemeResolutionService.RegisterThemeFromStorage(...);

Also

Ive built a control which inherits from RadPanel, and when I try and theme it, the theme will not apply. I had a look at the resulting xml from the Visual Style Builder, and it was setting the ControlType attribute in the RadStylesheetRelation node to RadPanel instead of my class. I manually set this to my class and it worked fine. While this works, it is a pain, and if the client wants to create new themes later they will need to manually change the xml.

Any help would be appreciated

Thanks

Themes and Visual Style Builder

answered on 11 May 2009

1 answer

138 views

AutoSizeRow

Hi

I've got a little problem when I'm using the AutoSizeRow functionnality of the Telerik GridView.
Each time I set this property to true, the loading become very long and oftenly it just stops working.
More over, when I schrool verticaly the datagrid, the rows size dont follow the order of the datagrid.

When AutoSizeRow are false, everything is perfect.

Could you please help solving this issue

Thanks

GridView

answered on 08 May 2009

1 answer

128 views

Wrong entries in forms designer for localized vb app

Hello again,
I am using Visual Studio 2008 for a Visual Basic project together with RadControls for WinForms Q1 2009.
My app is localisable and I have two resource files called "UiSettings.en-GB.resx" and "UiSettings.resx".
When adding a rad control to my form, lets say a RadGroupBox (but the problem occurs also with a TabStrip) the following entries are added to the forms designer:
"Me.radgrb_ConnAcrobat.FooterImageKey = Global.COACH.UiSettings_en_GB."
"Me.radgrb_ConnAcrobat.HeaderImageKey = Global.COACH.UiSettings_en_GB."

including the points at the end, where COACH is the namespace of my app.
The error message is "UiSettings_en_GB is no member of COACH"

I can manually delete the entries but they appear again after compiling.
Can't work with all these error messages.
Could you please help?
Thanks in advance
Roberto Wenzel

General Discussions

answered on 08 May 2009