Questions on UI for WinForms Forum

10 answers

338 views

Does ExportToExcelML support exporting child templates?

If yes, then when I try to export, I get this error...

System.InvalidOperationException: {"Could not find neighbour element!"}

and the stack trace is at

Telerik.WinControls.UI.Export.ExportToExcelML.SearchForNeighbourElement(List`1 radElementList, Int32 index) at Telerik.WinControls.UI.Export.ExportToExcelML.CreateStyleElement(GridViewRowInfo gridViewRowInfo, Int32 cellIndex) at Telerik.WinControls.UI.Export.ExportToExcelML.CreateRowElement(WorkBookElement workbook, GridViewRowInfo gridViewRowInfo) at Telerik.WinControls.UI.Export.ExportToExcelML.AddWorkSheetWithHeaderRow(WorkBookElement workbook, FileStream fileStream, Int32& currentSheet, Int32& currentRow) at Telerik.WinControls.UI.Export.ExportToExcelML.RunExport(String fileName)

The code being used is

Dim cc As New ExportToExcelML(grid)

cc.ExportVisualSettings = True

cc.RunExport(saveFileDialog1.FileName)

GridView

answered on 15 Dec 2011

5 answers

275 views

Filtering Question

How can I keep the gridview from applying its filterdescriptor untill the user presses enter in the filtercell (or leaves the cell by tab or click ie: the cellEndEdit event has passed (with rowIndex == -1))?

eg:
i have a column and I enter the filter string "abc" by typing the 3 character. Normally the grid will first add the fitlerdescriptor A then AB then ABC. Now I would like the behaviour of my gridview to be abc + "LEAVES FILTERFIELD" and then apply only 1 filterdescriptor ABC..

I have tried using a boolean "holdFiltering" which i set to true when the cellBeginEdit is fired on RowIndex == -1 and then i set it back to false at cellEndEdit, but unfortunately the cellEndEdit is fired AFTER the FilterChanging event (where i used the holdFiltering to set the e.Cancel = true & return from the method), this resulted in no more filtering whatsoever ;-)

Can anyone point me to or show me a working code snippet?

thank you in advance!

GridView

answered on 15 Dec 2011

1 answer

109 views

FilterChanging question

The GridViewCollectionChangingEventArgs on the FilterChanging event does not appear to be updated correctly. After the first filter change event, subsequent filters do not update NewItems and OldItems correctly.

The NewItems(0) does not reflect the updated filtered text. However, the NewValue does show the updated text. The OldItems(0) always equals zero, but OldValue is correct.

In addition, if the filter operator changes, the same discrepancy occurs, however the NewValue and OldValue are changed to an number. I'm assuming it is the enumerator of the operator.

See the screenshot and code example. I've opened a support ticket in case it is an actual bug, but hoping it is not and I'm just using it incorrectly.

Imports System.ComponentModel

Public Class Form1

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

Dim foo As New BindingList(Of Person)

Dim i As Integer

Do Until i = 100

foo.Add(New Person("Name " & i.ToString))

i = i + 1

Loop

RadGridView1.DataSource = foo

End Sub

Public Class Person

Property Name As String

Public Sub New(ByVal Name As String)

_Name = Name

End Sub

End Class

Private Sub RadGridView1_FilterChanging(sender As Object, e As Telerik.WinControls.UI.GridViewCollectionChangingEventArgs) Handles RadGridView1.FilterChanging

TextBox1.Text = e.NewItems(0).ToString

TextBox2.Text = e.NewValue

If e.OldItems IsNot Nothing Then

TextBox3.Text = e.OldItems(0).ToString

TextBox4.Text = e.OldValue

End If

End Sub

End Class

GridView

answered on 15 Dec 2011

3 answers

108 views

DropDownButton Problem

Hi, I had version Q2 2011 WinForms VISUAL Style Builder, and change to the NEW VERSION OF Q3 2011, but there were some problems with DropDownButton because I can not change the properties of the button or save the changes. This problem only happens with this element (DropDownButton). How can I solve the problem?

Best Regards, Rui Silva

Buttons, RadioButton, CheckBox, etc

answered on 15 Dec 2011

1 answer

113 views

MaskedEditBox ValueChanged

Hi!

I've been having trouble with the maskededitbox valuechanged event. Please check the following example:

Private Sub RadMaskedEditBox1_ValueChanging(sender As Object, e As System.ComponentModel.CancelEventArgs) Handles RadMaskedEditBox1.ValueChanging

MessageBox.Show("Value=" & RadMaskedEditBox1.Value)

End Sub

It does not show the proper value.

Also, I'd like to know if there is a way to disable the increase/decrease value using the up/down arrows.

Thanks for your help.

MaskedEditBox

answered on 15 Dec 2011

3 answers

243 views

Link Button Type Column in Grid View

Hi,

I am looking at creating the columns dynamically and one of the column should be link column. How do we create link button type column in rad grid view? Please help.

GridView

answered on 15 Dec 2011

5 answers

81 views

Press Suppress in RadDateTimePicker

I am doing a schedule and found the next problem with the control RadDateTimePicker when i press the key suppress in the keyboard and then i go back to the control and try to choose the number 12, its doesn't work or i can't see the number 12 and of fact i checked the telerik Demo and found the same..

do you know if its is a problem with the control..or what i can do in this case?

Thanks for your Help.

Calendar, DateTimePicker, TimePicker and Clock

answered on 14 Dec 2011

2 answers

113 views

RadTabStrip to RadPageView

Has anyone here managed to upgrade a RadTabStrip to a RadPageView?

Tabstrip (obsolete as of Q2 2010)

answered on 13 Dec 2011

1 answer

405 views

Context Menu.show is VERY slow when there are a lot of items (> 100) in the menu

I know it's an unusual situation, but I have a case where I'm adding the items to the context menu's items collection in code... I build the context menu when the form loads. When I call the .show method, it works fine when there are not many items in the .items collection... maybe >20. In many cases, I have 100+ and it effectivly does not work.... minutes later, the context menu finally pops.

I replaced the control w/ the free one that ships from Microsoft and it works fine with no other changes to the code.

In the form's load event....

cm = new RadContextMenu();

foreach (string g in groups)

{

RadMenuItem mnu = new RadMenuItem();

mnu.Text = g;

mnu.Click += new EventHandler(cmclick);

cm.Items.Add(mnu);

}

showing the context menu...

cm.Show(radChart1, new Point(0, 0));

ContextMenu

answered on 13 Dec 2011

1 answer

119 views

Group Element Mouse Events

Hi

Is there a way to capture a mouse event on a tilegroupelement ? I have tried the obvious but it doesn't fire any events that I could see.

Thanks in advance for any help.

Regards

Paul.

Panorama

answered on 13 Dec 2011