Questions on UI for WinForms Forum

4 answers

251 views

can i drag and drop the rows from in the grid ?

Can I drag and drop the row to reorder the rows in radgridview ?

Thanks in Advance
Ragupathi

GridView

answered on 19 Feb 2010

3 answers

497 views

NullReferenceException in Telerik.WinControls.GridView.dll

Hello,

I've got a bit of a problem with Q2 2009 GridView. I use a child GridViewTemplate, but whenever I try to expand its row (with row.IsExpanded = true) I get a NullReferenceException at Telerik.WinControls.UI.DataGroup.get_RowCount()
at Telerik.WinControls.UI.GridViewInfo.SetViewInfoToRows(DataGroup rootGroup)
at Telerik.WinControls.UI.GridViewInfo.InitializeChildViewInfo()
at Telerik.WinControls.UI.GridViewTemplate.CreateGridViewInfo(DataGroup rootGroup, GridViewDataRowInfo parentRow)
at Telerik.WinControls.UI.GridViewDataRowInfo.SetExpanded(Boolean value)
at Telerik.WinControls.UI.GridViewRowInfo.set_IsExpanded(Boolean value).

After looking closely at what's going on I noticed that DataGroup.owner is null, and DataGroup.IsDisposed == true. I think the group gets disposed in DataAccessComponent.InitDataGrid() when I set DataMember of my ChildGridViewTemplate to null and its DataSource to a DataTable that was earlier filled with data.

After that the DataGroups never get recreated, so when I try to expand my ChildGridViewTemplate, DataGroups are still disposed (with owner set to null) and I get the exception. I also noticed that if I add new data rows to the DataTable after assigning it as DataSource than the new rows expand just fine, only the old ones throw exceptions.

So my question is, is there any way I can force the DataGrid to recreate disposed DataGroup for already existing rows ?

Regards,

Piotr Kochanowski

GridView

answered on 19 Feb 2010

3 answers

88 views

Vista / Windows 7 address bar

I thing every Vista / Windows 7 users know what I talking about.

This could be a fantastic way to navigate though a tree of items.

Right now I did my home-made one with a panel and a series of RadDropDownButton

New Product Suggestions

answered on 19 Feb 2010

3 answers

533 views

[Solved] Multiple font setups for radLabel

In my application I would like to set font for all labels via themes, which work great.
Most labels sit next to controls which are set to bold.

But as I was adding more labels I noticed that some labels that I have been adding should not be bold, should be using the same font type that the rest of the labels do, but should not be set to bold.

I have tried several things, but any change to font in code is overwritten by the theme.
I have tried looking at setting conditions in the theme, but radlabelelement has nothing useful i can bank on.

Thank you,

Themes and Visual Style Builder

answered on 19 Feb 2010

3 answers

167 views

New Visual Style Builder

Is the new style builder not in the beta release? I uninstalled the prev release, installed the beta, opened my project, went to the smarttag on a textbox, and the old editor opened...

Did I do something wrong, do we get to the new editor in a different way?

Themes and Visual Style Builder

answered on 19 Feb 2010

1 answer

140 views

How to trap Auto-Hide event

Is there a way to get notified (via an event) when a DockWindow (with DockState=Autohide) slides out or in? I'm trying to set the focus on a textbox located in the autohide window when it is shown by mousing over the tab.

Thanks

Alain

Dock

answered on 19 Feb 2010

6 answers

203 views

CommandBindings are reset after Build

Hi,
I have a RADMenuItem for Refresh with a command binding for Action command set for CTRL + F5 using the designer. When I build the application, the command binding gets reset to default which is nothing...
What should I be doing?

Thanks
Deepak

Menu

answered on 19 Feb 2010

8 answers

656 views

ComboBox and SelectedIndex

Please, can you help me with this question:

I have a grid with combobox column. All of these comboboxes have different DataSorce property (assigned thouth intercepting CellEditorInitialized event):

    
                Private Sub gridSort_CellEditorInitialized(ByVal sender As Object, ByVal e As Telerik.WinControls.UI.GridViewCellEventArgs) Handles gridSort.CellEditorInitialized
 
                    Dim i As Integer
 
                    If gridSort.CurrentColumn.HeaderText = "Order" Then
 
                        Dim editor As Telerik.WinControls.UI.RadComboBoxEditor = gridSort.ActiveEditor
 
                        Dim editorElement As Telerik.WinControls.UI.RadComboBoxEditorElement = editor.EditorElement
 
                        If gridSort.Rows.IndexOf(gridSort.CurrentRow) = 1 Then
 
                            i = editorElement.SelectedIndex
 
                            editorElement.DataSource = New String() {"Minimized", "Maximized"}
 
                            editorElement.SelectedIndex = i
 
                            If i < 0 Then
 
                                Dim ii As Integer = 0
 
                                For Each ss As String In editorElement.DataSource
 
                                    If ss = gridSort.CurrentRow.Cells.Item(1).Value Then
 
                                        editorElement.SelectedIndex = ii
 
                                        Exit For
 
                                    End If
 
                                    ii += 1
 
                                Next
 
                            End If
 
                        Else
 
                            i = editorElement.SelectedIndex
 
                            editorElement.DataSource = New String() {"Ascending", "Descending"}
 
                            editorElement.SelectedIndex = i
 
                        End If
 
                    End If
 
                End Sub

1. Every time editorElement.SelectedIndex have value -1 (and I must set value by searching throuh DataSource list and comparing with cell Value). For values Minimized/Maximized it's done and work fine, but for values Ascending/Descending it's not and when I click on combobox field - it's filled by empty sring.

Comparing with Value of cell is not fine because here can be some duplicated values (sic!) and I can not determine what value was in this cell before. Is here some method of determine SelectedIndex after changing of value?

2. I want to collect data choosen by user. But ComboBox cell in grid have not SelectedIndex (or I can not find it?) and I must to obtain it from Value property. Problem is similiar with previous question - how can I find a real position of value in DataSource list?

GridView

answered on 19 Feb 2010

1 answer

128 views

GridView and pinned rows

Hello,

I have reported a problem with the pinned rows (in the radGrid) for the Q3 2009, this problem do not seem to be resolved in the Q1 2010 Beta.

Initial post : http://www.telerik.com/community/forums/winforms/gridview/gridview-and-pinned-rows.aspx

Regards.

Court Philippe.

GridView

answered on 19 Feb 2010

3 answers

184 views

[Solved] Incorrectly self-resizing RadMenuItem

I'm using 2009 Q3 Winforms. In order to create a multi-select dropdown combobox, I used a few other forum posts' responses as a guide. I created a GridMenuItem class that inherited from RadMenuItemBase and implemented INotifyPropertyChanged. That GridMenuItem contains a RadGridView and adds that GridView as a RadHostItem to its children.

Anyway, what happens is that the dropdown grid will resize itself each time you drop it down. It appears to be decreasing the height while increasing the width, by a small amount (I think around 6 both ways). Eventually you get to an ever-increasing line. I cannot seem to figure out what is wrong.

Below is the code to show what is happening.

Thoughts?

(Create a new Forms project with Form1, add a dropdown button)

    
            Imports Telerik.WinControls  
        
            Imports Telerik.WinControls.UI  
        
            Imports System.Text  
        
            Imports System.Data.Common  
        
            Imports System.ComponentModel  
        
            Public Class Form1  
        
                Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load  
        
                    Dim Item As GridMenuItem = New GridMenuItem  
        
                    Dim Grid As RadGridView = Item.Grid  
        
                    Grid.Columns.Add(New GridViewDataColumn("A"))  
        
                    Grid.Columns.Add(New GridViewDataColumn("b"))  
        
                    Grid.Columns.Add(New GridViewDataColumn("c"))  
        
                    Grid.Rows.Add("Hello", "World", "!")  
        
                    Grid.Rows.Add("Hello", "World", "!")  
        
                    Grid.Rows.Add("Hello", "World", "!")  
        
                    Grid.ReadOnly = False 
        
                    Grid.Columns(0).Width = 5 
        
                    Grid.Columns(1).ReadOnly = True 
        
                    Grid.Columns(2).IsVisible = False 
        
                    RadDropDownButton1.Items.Clear()  
        
                    RadDropDownButton1.Items.Add(Item)  
        
                End Sub  
        
            End Class

Here's the item:

    
            Imports Telerik.WinControls.UI  
        
            Imports Telerik.WinControls  
        
            Imports System.ComponentModel  
        
            Public Class GridMenuItem  
        
                Inherits RadMenuItemBase  
        
                Implements INotifyPropertyChanged  
        
                Dim _Grid As RadGridView  
        
                Dim _HostItem As RadHostItem  
        
                Public ReadOnly Property Grid() As RadGridView  
        
                    Get  
        
                        Return Me._Grid  
        
                    End Get  
        
                End Property  
        
                Protected Overrides Sub CreateChildElements()  
        
                    _Grid = New RadGridView()  
        
                    _Grid.BeginInit()  
        
                    _Grid.BindingContext = New BindingContext()  
        
                    _Grid.MultiSelect = True 
        
                    _Grid.AutoSize = False 
        
                    _Grid.HideColumnChooser()  
        
                    _Grid.ReadOnly = False 
        
                    _Grid.ShowGroupPanel = False 
        
                    _Grid.ShowNoDataText = False 
        
                    Dim Template As GridViewTemplate = _Grid.MasterGridViewTemplate  
        
                    Template.AllowCellContextMenu = False 
        
                    Template.AllowColumnChooser = False 
        
                    Template.AllowColumnHeaderContextMenu = False 
        
                    Template.AllowColumnReorder = False 
        
                    Template.AllowAddNewRow = False 
        
                    Template.AutoSizeColumnsMode = Telerik.WinControls.UI.GridViewAutoSizeColumnsMode.Fill  
        
                    Template.EnableGrouping = False 
        
                    Template.ShowFilteringRow = False 
        
                    Template.ShowRowHeaderColumn = False 
        
                    Template.ShowColumnHeaders = False 
        
                    _Grid.EndInit()  
        
                    _HostItem = New RadHostItem(_Grid)  
        
                    Me.Children.Add(_HostItem)  
        
                End Sub  
        
                Protected Overrides Function MeasureOverride(ByVal availableSize As System.Drawing.SizeF) As System.Drawing.SizeF  
        
                    Dim size As System.Drawing.SizeF = MyBase.MeasureOverride(availableSize)  
        
                    Return _Grid.Size  
        
                End Function  
        
            End Class

Buttons, RadioButton, CheckBox, etc

answered on 19 Feb 2010