Questions on UI for WinForms Forum

1 answer

55 views

SaveLayout error

Is this by design? If I perform a "SaveLayout" and the file already exists but it's HIDDEN flag is set, I get an access denied error.

Just curious.

GridView

answered on 21 Dec 2011

3 answers

129 views

SelectedItem is Nothing when Text = "" (bug?)

Hi,

When I set the Text property of one of the items to a Null string ("") and it's selected then the SelectedItem property of the DDL gives a Nothing value. If I set the Text property to f.e. 1 space (" ") then I don't have this problem.

DropDownList

answered on 21 Dec 2011

5 answers

314 views

Assembly Confusion in Telerik Winforms

Hi All

I have a problem where Visual Studio is trying to use a telerik assembly (which it calls a Component Assembly) that resides in different folder from the one mentioned in the referenced assemblies list(Designer Assembly). It displays 3 error messages one after the other.

1. Here is the full text of the error in the first message box:
===========================================
Visual Studio Error Detected

Visual Studio is attempting to load class instances from a different assembly than the original used to create your components. This will result in failure to load your designed component. More information that will help you to correct the problem.

Component Assembly:

C:\Documents and Settings\Yosief.Kesete\Local Settings\Application Data\Microsoft\VisualStudio\9.0\ProjectAssemblies\aoxm94wn01\Telerik.WinControls.GridView.dll

Designer Assembly:

C:\Program Files\Telerik\RadControls for WinForms Q1 2010\bin\Telerik.WinControls.UI.Design.dll

Please close Visual Studio, remove the errant assembly and try loading your designer again.

Ensure that you do not attempt to save any designer that opens with errors, as this can result in loss of work. Note that you may receive this message multiple times, once for each component instance in your designer.

===========================================

2. And this is what gets displayed in the second message box:
===========================================

Error

An exception occurred while trying to update the data smart tasks, they will be disabled.

Property accessor 'DataSource' on object 'Telerik.WinControls.UI.Design.RadGridViewDesigner' threw the following exception:'[A]Telerik.WinControls.UI.RadGridView cannot be cast to [B]Telerik.WinControls.UI.RadGridView. Type A originates from 'Telerik.WinControls.GridView, Version=2010.1.10.308, Culture=neutral, PublicKeyToken=5bb2a467cbec794e' in the context 'LoadNeither' at location 'C:\Documents and Settings\Yosief.Kesete\Local Settings\Application Data\Microsoft\VisualStudio\9.0\ProjectAssemblies\aoxm94wn01\Telerik.WinControls.GridView.dll'. Type B originates from 'Telerik.WinControls.GridView, Version=2010.1.10.308, Culture=neutral, PublicKeyToken=5bb2a467cbec794e' in the context 'LoadFrom' at location 'C:\Program Files\Telerik\RadControls for WinForms Q1 2010\bin\Telerik.WinControls.GridView.dll'.'

===========================================

3. The following gets displayed in the last message box:
===========================================

Microsoft Visual Studio

The control Telerik.WinControls.UI.RadGridView has thrown an unhandled exception in the designer and has been disabled.

Exception:

Object reference not set to an instance of an object.

Stack trace:

===========================================

Any idea why that happening? Please help ASAP as I have spent 15 hours trying to figure why.

Thank you in advance
Yosief Kesete

General Discussions

answered on 21 Dec 2011

8 answers

263 views

Hyperlinks

Is it possible to add hyperlinks to the RichTextBox and if so, is it possible to "catch" those links so that if a person for example clicks on a particular link you can programmatically call a procedure.

(I normally do this with the Microsoft Browser Control)

RichTextBox (obsolete as of Q3 2014 SP1)

answered on 21 Dec 2011

2 answers

107 views

RichRibbonBar

Wasnt sure if this should be here or the RibbonBar section..
i followed the directions http://www.telerik.com/help/winforms/richtextbox-features-ribbon-ui.html, but get an error on step 6. Error message in the attached file. Please help

RichTextBox (obsolete as of Q3 2014 SP1)

answered on 21 Dec 2011

2 answers

144 views

Strange ExplorerBar behaviour

Hi Telerik

I've been struggling over the weekend with a problem in our app. We currently use a pageview in stack mode to display a collection of items grouped into the pageview's pages. The pageview and its pages are generated programmatically and we use another control dock/filled into the pages to contain the items.

The items display fine in stack mode but the number of items to be displayed now requires a mechanism of display which allows scrolling. I thought I woud use explorerbar for this but when I change the mode of the pageview to explorerbar the controls containing the items no longer show up in the pages. The pageview and its pages do show up.

I have not been able to reproduce the problem in a simple project (the explorerbar idea works fine in the simple project). More strangely I only need to change

RadPageView temp = new RadPageView() { Dock = DockStyle.Fill };

temp.ViewMode = PageViewMode.ExplorerBar;

to

RadPageView temp = new RadPageView() { Dock = DockStyle.Fill };

temp.ViewMode = PageViewMode.Stack;

and the rest of the code in the app creates the correct pages, controls and items and displays them.

Are there any properties I need to set specific to the explorerbar mode which will allow the content of my pages to show when in explorerbar mode?

Have you come across this problem before?

Regards
Ian Carson

PageView

answered on 21 Dec 2011

3 answers

224 views

Refilling a RadGridView using Entitiy Framework instead of Dataset

Hello,

I'm looking for the Entity Framework equivalent of dataset's tableAdapter.Fill/tableAdapter.FillByBy.

Because they were reusable to refill a GridView (Windforms), possibly using a different 'where clause'.

The only way I know to fill/refill the GridView from DB now using EF with different parameters:

this.myBindingSource.DataSource =  myNewSelectQueryObject;

the 'first fill' with this works fine, but the second one will cause the DataSource et the GirdView to be impossible to edit. (Although the BindingSource the GridView are NOT 'readonly'.) a,d EF.Refresh() doesn't seem to update records that could be in the DB but are not present in the 'EF'.

Thank you for your help.

GridView

answered on 21 Dec 2011

2 answers

213 views

radlistview transparent

Hi ,
i am using latest telerik version
in order to make radlistview transparent to form background i had set the color of radlistview to transparent but it always show a white background on runtime.
if there is any code or method to make radlistview transparent to parent form i will appreciate help.
Best regards, jack

ListView

answered on 21 Dec 2011

5 answers

261 views

DateTimeOffset

We continue to have problems with using a GridViewDateTimeColumn with DateTimeOffset. I *thought* we had this working months ago, but revisited a feature that we have not used for many months and we cannot get it to work. Don't know if it is due to the version of the controls we are using? Or something we have done.

We continue to either get "Converter can't convert" or other types of formatting errors. To help demonstrate this problem, we did a very simple sample. Just try to drop down one of the calendar drop downs and the error occurs.

Here is the code:

Imports System.ComponentModel

Imports Telerik.WinControls.UI

Public Class Form1

Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load

TimeCardGrid.MasterTemplate.AutoSizeColumnsMode = Telerik.WinControls.UI.GridViewAutoSizeColumnsMode.Fill

TimeCardBindingSource.DataSource = TimeCards.Retrieve()

End Sub

End Class

Public Class TimeCard

Public Property StartTime As DateTimeOffset?

Public Property endTime As DateTimeOffset?

End Class

Public Class TimeCards

Inherits BindingList(Of TimeCard)

Public Shared Function Retrieve() As TimeCards

Dim timeCardList As New TimeCards From

{New TimeCard With {.StartTime = New DateTimeOffset(2011, 12, 8, 9, 45, 30, New TimeSpan(-8, 0, 0)),

.endTime = New DateTimeOffset(2011, 12, 9, 11, 45, 30, New TimeSpan(-8, 0, 0))},

New TimeCard With {.StartTime = New DateTimeOffset(2011, 12, 11, 9, 45, 30, New TimeSpan(-8, 0, 0)),

.endTime = New DateTimeOffset(2011, 12, 12, 11, 45, 30, New TimeSpan(-8, 0, 0))}}

Return timeCardList

End Function

End Class

<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _

Partial Class Form1

Inherits System.Windows.Forms.Form

'Form overrides dispose to clean up the component list.

<System.Diagnostics.DebuggerNonUserCode()> _

Protected Overrides Sub Dispose(ByVal disposing As Boolean)

Try

If disposing AndAlso components IsNot Nothing Then

components.Dispose()

End If

Finally

MyBase.Dispose(disposing)

End Try

End Sub

'Required by the Windows Form Designer

Private components As System.ComponentModel.IContainer

'NOTE: The following procedure is required by the Windows Form Designer

'It can be modified using the Windows Form Designer.

'Do not modify it using the code editor.

<System.Diagnostics.DebuggerStepThrough()> _

Private Sub InitializeComponent()

Me.components = New System.ComponentModel.Container()

Dim GridViewDateTimeColumn1 As Telerik.WinControls.UI.GridViewDateTimeColumn = New Telerik.WinControls.UI.GridViewDateTimeColumn()

Dim GridViewDateTimeColumn2 As Telerik.WinControls.UI.GridViewDateTimeColumn = New Telerik.WinControls.UI.GridViewDateTimeColumn()

Me.TimeCardBindingSource = New System.Windows.Forms.BindingSource(Me.components)

Me.TimeCardGrid = New Telerik.WinControls.UI.RadGridView()

CType(Me.TimeCardBindingSource, System.ComponentModel.ISupportInitialize).BeginInit()

CType(Me.TimeCardGrid, System.ComponentModel.ISupportInitialize).BeginInit()

Me.SuspendLayout()

'

'TimeCardBindingSource

'

Me.TimeCardBindingSource.DataSource = GetType(WindowsApplication9.TimeCard)

'

'TimeCardGrid

'

Me.TimeCardGrid.Location = New System.Drawing.Point(12, 12)

'

'TimeCardGrid

'

Me.TimeCardGrid.MasterTemplate.AllowAddNewRow = False

Me.TimeCardGrid.MasterTemplate.AllowColumnChooser = False

Me.TimeCardGrid.MasterTemplate.AllowColumnReorder = False

Me.TimeCardGrid.MasterTemplate.AllowDeleteRow = False

Me.TimeCardGrid.MasterTemplate.AllowDragToGroup = False

Me.TimeCardGrid.MasterTemplate.AutoGenerateColumns = False

GridViewDateTimeColumn1.DataType = GetType(System.Nullable(Of System.DateTimeOffset))

GridViewDateTimeColumn1.FieldName = "StartTime"

GridViewDateTimeColumn1.Format = System.Windows.Forms.DateTimePickerFormat.[Short]

GridViewDateTimeColumn1.FormatString = "{0:d}"

GridViewDateTimeColumn1.HeaderText = "StartTime"

GridViewDateTimeColumn1.Name = "StartTime"

GridViewDateTimeColumn2.DataType = GetType(System.Nullable(Of System.DateTimeOffset))

GridViewDateTimeColumn2.FieldName = "EndTime"

GridViewDateTimeColumn2.Format = System.Windows.Forms.DateTimePickerFormat.[Short]

GridViewDateTimeColumn2.FormatString = "{0:d}"

GridViewDateTimeColumn2.HeaderText = "EndTime"

GridViewDateTimeColumn2.Name = "EndTime"

Me.TimeCardGrid.MasterTemplate.Columns.AddRange(New Telerik.WinControls.UI.GridViewDataColumn() {GridViewDateTimeColumn1, GridViewDateTimeColumn2})

Me.TimeCardGrid.MasterTemplate.DataSource = Me.TimeCardBindingSource

Me.TimeCardGrid.MasterTemplate.ShowFilteringRow = False

Me.TimeCardGrid.MasterTemplate.ShowRowHeaderColumn = False

Me.TimeCardGrid.Name = "TimeCardGrid"

Me.TimeCardGrid.ShowGroupPanel = False

Me.TimeCardGrid.Size = New System.Drawing.Size(315, 235)

Me.TimeCardGrid.TabIndex = 2

Me.TimeCardGrid.Text = "RadGridView1"

'

'Form1

'

Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)

Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font

Me.ClientSize = New System.Drawing.Size(347, 263)

Me.Controls.Add(Me.TimeCardGrid)

Me.Name = "Form1"

Me.Text = "Form1"

CType(Me.TimeCardBindingSource, System.ComponentModel.ISupportInitialize).EndInit()

CType(Me.TimeCardGrid, System.ComponentModel.ISupportInitialize).EndInit()

Me.ResumeLayout(False)

End Sub

Friend WithEvents TimeCardBindingSource As System.Windows.Forms.BindingSource

Friend WithEvents TimeCardGrid As Telerik.WinControls.UI.RadGridView

End Class

Please let us know what we need to do to get this to work.

THANKS!

GridView

answered on 21 Dec 2011

1 answer

99 views

listview

is there a method to make listview transparent

ListView

answered on 21 Dec 2011