Questions on UI for WinForms Forum

3 answers

190 views

Hello

Is it possible to make winform application with telerik radcontrols running under Mono?

When I try this out there is some exception and application doesn’t start.

Unhandled Exception: System.NullReferenceException: Object reference not set to
an instance of an object
at Telerik.WinControls.UI.RadFormControlBase.get_Font () [0x00000] in <filenam
e unknown>:0
at System.Windows.Forms.Form..ctor () [0x0000d] in C:\cygwin\tmp\monobuild\bui
ld\BUILD\mono-2.6.7\mcs\class\Managed.Windows.Forms\System.Windows.Forms\Form.cs
:402
at Telerik.WinControls.UI.RadFormControlBase..ctor () [0x00000] in <filename u
nknown>:0
at Telerik.WinControls.UI.RadForm..ctor () [0x00000] in <filename unknown>:0
at TelerikGoesMono.MainForm..ctor () [0x00007] in TelerikGoesMono\MainForm.cs:
14
at (wrapper remoting-invoke-with-check) TelerikGoesMono.MainForm:.ctor ()
at TelerikGoesMono.Program.Main () [0x0000e] in TelerikGoesMono\Program.cs:18

Tryck ned valfri tangent för att fortsätta...

General Discussions

answered on 01 Jun 2012

2 answers

128 views

GridView performance of filtering

Hallo,

Version: 2012.1.301

I use the custom filtering functionality like in Telerik demo "Custom Filter Row" (see attachment 1.jpg)
For the custom filtering I used the source code from this demo: (see attachment 2.jpg)

In my GridView are 16 columns and 300 rows. The performance of filtering is very bad.

In our scenario it is possible, that the count of rows is greater than 50.000 - 60.000.

Telerik's answer:
"The Demo application uses string based comparison of data for the search functionality, and string based comparison is an expensive operation. This example just aims to demonstrate a possible solution regarding the custom filtering operation, and it does not intent to achieve the best possible performance. The solution there is up to the developer that is going to make the comparison. For example, in order to have good performance in this scenario, you may need to implement some kind of indexing functionality and cache the result in a memory data structure based on row and column indices. RadGridView in the case of custom filtering only gets the result and sets Visible property for every row.

Speaking in the context of the built-in supported filtering features, the current version of RadGridView control does not implement built-in indexing algorithm for full text search. More information about text search you can find in this stackoverflow discussion.

I hope this information is useful."

This answer is not sufficient.

Please help me, I need a high-performance solution!

best regards,

Daniel

GridView

answered on 01 Jun 2012

2 answers

145 views

which event after selecting in GridViewMultiColumnComboBox in GridView

I have a gridview and multicolumncombobox in that gridview. How do I detect the event when I select the value/item from the combobox.

GridView

answered on 01 Jun 2012

4 answers

773 views

SelectedPage Events question

I'm trying to add and remove handlers as a page is loaded and unloaded using the RAdPageVIew Control.
I am subscribing to both SelectedPageChanging and SelectedPageChanged events to monitor when appropriate pages load, however I cannot seem to retain the previous page in order to know which handlers to remove. I also can't seem to get the PageIndexChanged event to fire -at all.

I'm using VB.net with the latest build of WinForm controls.

Can I get a sort example to determine which page is closing and which one is opening.

I appreciate the help.

PageView

answered on 01 Jun 2012

2 answers

128 views

heirarchy grid

Hi
I used from Hierarchy grid.how can i resize width of child grid .
i can resize height of cells of child grid with this code

void radGridView1_ChildViewExpanded(object sender, ChildViewExpandedEventArgs e)
{
    e.ChildRow.Height = 300;
}

but cant change width of child grid.In normal width of child grid is same with parent grid

GridView

answered on 01 Jun 2012

3 answers

278 views

ToolTipTextNeeded event not being raised

I have a custom cell element within a RadGridView. The custom cell is a RadGridView as well. I would like to show tooltips on some of the cells in the inner RadGridView. I am able to do this successfully by setting the cell's tooltiptext property in the Cell_formatting event, however, I need the tooltip to show for longer and I also need to format it. So, I tried creating an event handler for the ToolTipTextNeeded event and displaying a Windows.Forms tooltip there, but the event is not being raised at all. Please see my code below. If anyone can point out what I'm doing wrong, I'd really appreciate it.

Imports Telerik.WinControls.UI

Public Class ClaimAdjustmentsCellElement

Inherits GridDataCellElement

Public Sub New(ByVal column As GridViewColumn, ByVal row As GridRowElement)

MyBase.New(column, row)

End Sub

Private _radGridView As RadGridView

Private tip As ToolTip = New ToolTip With {.BackColor = Color.AliceBlue, .ToolTipIcon = ToolTipIcon.Info, .InitialDelay = 500, .ShowAlways = True}

Protected Overrides Sub CreateChildElements()

MyBase.CreateChildElements()

_radGridView = New RadGridView()

With _radGridView

.Dock = DockStyle.Fill

.ReadOnly = True

.ShowFilteringRow = False

.ShowGroupPanel = False

.ShowColumnHeaders = True

.ShowRowHeaderColumn = False

.ShowNoDataText = False

.AutoScroll = True

.AutoSizeRows = True

.SelectionMode = GridViewSelectionMode.CellSelect

.AutoGenerateColumns = False

.ShowItemToolTips = True

End With

Dim GroupCodeColumn As New GridViewTextBoxColumn("Group.Code") With {.HeaderText = "GC", .Width = 25}

Dim ReasonColumn As New GridViewTextBoxColumn("Reason.Code") With {.HeaderText = "RSN", .Width = 35}

Dim AmountColumn As New GridViewDecimalColumn("Amt") With {.HeaderText = "AMT", .FormatString = "{0:c}", .Width = 75}

Dim IsDenialColumn As New GridViewCheckBoxColumn("Reason.IsDenial") With {.HeaderText = "Denial", .Width = 65}

_radGridView.Columns.AddRange(GroupCodeColumn, ReasonColumn, DescrColumn, AmountColumn, IsDenialColumn)

AddHandler _radGridView.CellFormatting, AddressOf _radGridView_CellFormatting

AddHandler _radGridView.ToolTipTextNeeded, AddressOf _radGridView_TooltipTextNeeded

Me.Children.Add(_radGridView.GridViewElement)

End Sub

Protected Overrides Sub SetContentCore(value As Object)

If value IsNot Nothing AndAlso (Not value.Equals(DBNull.Value)) Then

_radGridView.DataSource = value

End If

End Sub

Private Sub _radGridView_CellFormatting(sender As Object, e As CellFormattingEventArgs)

'e.CellElement.ToolTipText = ""

e.CellElement.DrawFill = False

If e.CellElement.IsSelected Then

e.CellElement.DrawBorder = False

Else

e.CellElement.DrawBorder = True

End If

'Dim oClaimAdj As ClaimAdjustment = TryCast(e.Row.DataBoundItem, ClaimAdjustment)

'Select Case e.Column.Name

' Case "Group.Code"

' If oClaimAdj IsNot Nothing AndAlso oClaimAdj.Group IsNot Nothing Then

' e.CellElement.ToolTipText = oClaimAdj.Group.Description

' End If

' Case "Reason.Code"

' If oClaimAdj IsNot Nothing AndAlso oClaimAdj.Reason IsNot Nothing Then

' e.CellElement.ToolTipText = oClaimAdj.Reason.Description

' End If

'End Select

End Sub

Protected Overrides ReadOnly Property ThemeEffectiveType As System.Type

Get

Return GetType(GridDataCellElement)

End Get

End Property

Public Overrides Function IsCompatible(data As Telerik.WinControls.UI.GridViewColumn, context As Object) As Boolean

Return TypeOf (data) Is ClaimAdjustmentColumn AndAlso TypeOf (context) Is GridDataRowElement

End Function

Private Sub _radGridView_TooltipTextNeeded(sender As Object, e As Telerik.WinControls.ToolTipTextNeededEventArgs)

Try

Dim cell As GridDataCellElement = TryCast(sender, GridDataCellElement)

If cell IsNot Nothing And tip IsNot Nothing Then

Dim oClaimAdj As ClaimAdjustment = TryCast(cell.RowElement.Data.DataBoundItem, ClaimAdjustment)

Dim tipText As String = ""

Select Case cell.ColumnInfo.FieldName

Case "Group.Code"

If oClaimAdj IsNot Nothing AndAlso oClaimAdj.Group IsNot Nothing Then

tipText = oClaimAdj.Group.Description

End If

Case "Reason.Code"

If oClaimAdj IsNot Nothing AndAlso oClaimAdj.Reason IsNot Nothing Then

tipText = oClaimAdj.Reason.Description

End If

End Select

If Not String.IsNullOrEmpty(tipText) Then

With tip

.Active = False

.AutoPopDelay = 30000

.SetToolTip(_radGridView, tipText)

.Active = True

End With

End If

Catch ex As Exception

throw

End Try

End Sub

End Class

GridView

answered on 01 Jun 2012

5 answers

239 views

CellFormatting doesn't allow BackColor to be set?

I posted this before but the post seems to have vanished

    
            void TelerikRadGridViewEnhanced_CellFormatting(object sender, Telerik.WinControls.UI.CellFormattingEventArgs e)  
        
                    {            
        
                        if(!(e.CellElement.RowElement is Telerik.WinControls.UI.GridTableHeaderRowElement) && TextColorOverrideFunction != null)  
        
                        {  
        
                            e.CellElement.ForeColor  = TextColorOverrideFunction((e.CellElement.RowInfo.DataBoundItem as DataRowView).Row);  
        
                        }  
        
                  }

This works fine and sets the foreground (text) color. However despite there being 4 BackColor properties, I can't change the back color, it is overridden by the theme. Is there a way to set the BackColor? Thanks

GridView

answered on 01 Jun 2012

2 answers

188 views

How i can set SelectedValue allow both uppercase or lowercase value

Hi, Telerik team.
I'm working with Telerik Winform controls Q1 2012.
I want when i set SelectedValue = "admin" or SelectedValue = "ADMIN" ,anyway RadMultiColumCombobox will return just one Value in Datasource .Can i set which Properties?
Thanks .

MultiColumn ComboBox

answered on 01 Jun 2012

0 answers

43 views

Bug or Feature?

Hello,

some minutes ago I discovered a behavior on GridView which let me struggled for some time. The background is, I fill the rows with data and set the Tag property of row to my data object. After calling GridView.Relations.AddSelfReference the type of rows changed from GridViewDataRowInfo to GridViewHierachyRowInfo. Cell data is copied, but Tag value is missed. As I saw in the Constructor of GridViewHierachyRowInfo the data cache is only copied. In my mind also the Tag data schould be copied?

My workaround is to build a separate Dictionary with the key on my data object, also used in the hierachy. So I can access the data, which should be stored in Tag property, now from Dictionary using the value of ny ID column in GridView.

Same behavior can also be discovered on Tag property of the Cells.

Regards from Leipzig

Holger

GridView

asked on 31 May 2012

1 answer

143 views

About Color Property

Hi..
Im using RadPropertyGrid to my own class..
that class contain Color Property..
when I test that my computer.

result was test2.jpg

but some person's computer show test1.jpg..

I couldn find why that result is diffrence.
I checked .net framework version. but both version is same.. plz help me..

and when i click color pickerbutton that popup window size didn show me full size.
also i cant change size..
this example is test3.jpg

plz answer this request..

Thanks.

PropertyGrid

answered on 31 May 2012