Questions on UI for WinForms Forum

5 answers

797 views

Change color or border a one header column

I'm trying to highlight just one column header.
I would also like the whole column to have a different border to the others.
But I have not managed to modify any element of the header either.
This is the code I am using:

Private Sub RadGridView1_CellFormatting(sender As Object, e As UI.CellFormattingEventArgs) Handles RadGridView1.CellFormatting

If TypeOf e.CellElement Is GridHeaderCellElement Then

e.CellElement.Font = myCustomFont

e.CellElement.BorderBoxStyle = BorderBoxStyle.OuterInnerBorders

End If

End Sub

Thanks!

GridView

answered on 26 Jul 2018

5 answers

279 views

Get click over annotation label

How can I get a click event over an annotation label?

And change mouse pointer like this?

ChartView

answered on 26 Jul 2018

7 answers

172 views

Custom RowPaint does not work in Print event

I'm using RowPaint event to "merge" cells. But when Printing it is not using the RowPaint event.

I tried to use PrintCellPaint event. But Row of event args are different. One is GridDataRowElement and other is GridViewDataRowInfo.

How can I use the same code to both events?

private void radGridView2_RowPaint(object sender, GridViewRowPaintEventArgs e)

{

var dataRow = e.Row as GridDataRowElement;

if (dataRow == null)

return;

var value = Convert.ToInt32(dataRow.RowInfo.Cells["Group"].Value);

if (value == -1)

return;

var startCell = e.Row.VisualCells[2];

var leftPos = startCell.PointToControl(startCell.Bounds.Location).X + (startCell.TableElement.CellSpacing * startCell.ColumnIndex);

var msgLocation = new Rectangle(leftPos + 1, 1, e.Row.Bounds.Width - leftPos - 2, e.Row.Bounds.Height - 2);

e.Graphics.FillRectangle(new SolidBrush(Color.White), msgLocation);

e.Graphics.DrawString(EventLogs[value], e.Row.Font, new SolidBrush(Color.Black), msgLocation);

var textSize = e.Graphics.MeasureString(EventLogs[value], e.Row.Font, msgLocation.Width);

//if (textSize.Height > dataRow.Size.Height)

startCell.RowInfo.Height = (int)textSize.Height;

}

GridView

answered on 26 Jul 2018

5 answers

115 views

RadPageViewContentAreaElement

Hi,

I'm working with a RadGridView to show dynamically some event come on my app. The RadGridView use a GridViewTemplate to show some children events and the relation is made with a GridViewRelation.
I do some tests to try to customize the display on the event ViewCellFormatting but I still have problem on the RadPageViewStripElement where like on the sample because I cannot remove the Yellow line (define on the RadPageViewContentAreaElement).

I would like know if it's possible to remove this yellow line?

private void GridView_ViewCellFormatting(object sender, CellFormattingEventArgs e)

{

GridDetailViewCellElement childCell = e.CellElement as GridDetailViewCellElement;

GridGroupExpanderCellElement expanderCell = e.CellElement as GridGroupExpanderCellElement;

if (childCell != null)

{

childCell.Padding = Padding.Empty;

RadPageViewStripElement stripElement = childCell.PageViewElement as RadPageViewStripElement;

if (stripElement != null)

{

stripElement.DrawBorder = false;

stripElement.Padding = Padding.Empty;

RadPageViewContentAreaElement contentArea = stripElement.ContentArea as RadPageViewContentAreaElement;

contentArea.DrawBorder = false;

contentArea.BackColor = Color.Yellow;

contentArea.Padding = Padding.Empty;

foreach (RadPageViewItem item in stripElement.Items)

{

item.Size = new Size(0, 1);

item.Visibility = ElementVisibility.Hidden;

item.DrawBorder = false;

}

else if ((expanderCell != null) && (expanderCell.RowElement is GridDataRowElement))

{

expanderCell.Expander.Visibility = ElementVisibility.Hidden;

}

GridView

answered on 26 Jul 2018

1 answer

405 views

Failed to compare two elements in the array

Hello, I am getting the below exception and I was wondering if there is any way to intercept the GridViewRowInfoComparer.CompareRows method to check for null values instead of throwing exception.

System.InvalidOperationException: Failed to compare two elements in the array. ---> System.NullReferenceException: Object reference not set to an instance of an object.
at Telerik.WinControls.UI.GridViewRowInfoComparer.CompareRows(GridViewRowInfo x, GridViewRowInfo y, SortDescriptorCollection context)
at Telerik.WinControls.UI.GridViewRowInfoComparer.Compare(GridViewRowInfo x, GridViewRowInfo y)
at System.Collections.Generic.ArraySortHelper`1.InternalBinarySearch(T[] array, Int32 index, Int32 length, T value, IComparer`1 comparer)
at System.Collections.Generic.ArraySortHelper`1.BinarySearch(T[] array, Int32 index, Int32 length, T value, IComparer`1 comparer)
--- End of inner exception stack trace ---
at System.Collections.Generic.ArraySortHelper`1.BinarySearch(T[] array, Int32 index, Int32 length, T value, IComparer`1 comparer)
at System.Array.BinarySearch[T](T[] array, Int32 index, Int32 length, T value, IComparer`1 comparer)
at System.Collections.Generic.List`1.BinarySearch(Int32 index, Int32 count, T item, IComparer`1 comparer)
at System.Collections.Generic.List`1.BinarySearch(T item, IComparer`1 comparer)
at Telerik.Collections.Generic.HybridIndex`1.PerformWithQuickSort()
at Telerik.Collections.Generic.HybridIndex`1.Perform()
at Telerik.Collections.Generic.HybridIndex`1.get_Items()
at Telerik.WinControls.Data.RadDataView`1.get_Items()
at Telerik.WinControls.Data.RadCollectionView`1.GetEnumerator()
at Telerik.WinControls.UI.GridViewInfo.Refresh()
at Telerik.WinControls.UI.GridViewInfo.get_ChildRows()
at Telerik.WinControls.UI.GridViewTemplate.get_ChildRows()
at Telerik.WinControls.UI.BaseGridNavigator.ProcessViewChangedEvent(GridViewEvent eventData)
at Telerik.WinControls.UI.BaseGridNavigator.ProcessEventCore(GridViewEvent eventData)
at Telerik.WinControls.UI.BaseGridNavigator.Telerik.WinControls.UI.IGridViewEventListener.ProcessEvent(GridViewEvent eventData)
at Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessCollection(GridViewEvent gridEvent, PriorityWeakReferenceList list, GridEventProcessMode processMode)
at Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessEvent(GridViewEvent gridEvent)
at Telerik.WinControls.UI.GridViewSynchronizationService.NotifyListeners(GridViewEvent gridEvent)
at Telerik.WinControls.UI.GridViewSynchronizationService.FlushEvents()
at Telerik.WinControls.UI.GridViewSynchronizationService.DispatchEvent(GridViewEvent gridEvent)
at Telerik.WinControls.UI.GridViewSynchronizationService.DispatchEvent(GridViewTemplate template, GridViewEvent eventData, Boolean postUI)
at Telerik.WinControls.UI.GridViewTemplate.DispatchEvent(GridViewEvent gridEvent, Boolean postUI)
at Telerik.WinControls.UI.GridViewTemplate.DispatchDataViewChangedEvent(Object sender, DataViewChangedEventArgs args)
at Telerik.WinControls.UI.GridViewTemplate.OnViewChanged(Object sender, DataViewChangedEventArgs e)
at Telerik.WinControls.UI.MasterGridViewTemplate.OnViewChanged(Object sender, DataViewChangedEventArgs e)
at Telerik.WinControls.UI.GridViewTemplate.CollectionView_CollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)
at Telerik.WinControls.Data.RadCollectionView`1.OnCollectionChanged(NotifyCollectionChangedEventArgs args)
at Telerik.WinControls.Data.RadDataView`1.RebuildData(Boolean notify)
at Telerik.WinControls.Data.RadDataView`1.RefreshOverride()
at Telerik.WinControls.Data.RadDataView`1.OnNotifyPropertyChanged(PropertyChangedEventArgs e)
at Telerik.WinControls.Data.RadCollectionView`1.OnNotifyPropertyChanged(String propertyName)
at Telerik.WinControls.Data.RadCollectionView`1.set_FilterExpression(String value)
at Telerik.WinControls.UI.GridViewFilterDescriptorCollection.ApplyFilter()
at Telerik.WinControls.UI.GridViewFilterDescriptorCollection.OnCollectionChanged(NotifyCollectionChangedEventArgs args)
at Telerik.Collections.Generic.NotifyCollection`1.ClearItems()
at Telerik.WinControls.UI.GridViewFilterDescriptorCollection.ClearItems()
at System.Collections.ObjectModel.Collection`1.Clear()
at Telerik.WinControls.UI.GridViewTemplate.RefreshFilterDescriptors(GridViewTemplate template)
at Telerik.WinControls.UI.GridViewTemplate.RefreshHierarchyProvider(GridViewTemplate template)
at Telerik.WinControls.UI.GridViewTemplate.set_DataSource(Object value)
at Telerik.WinControls.UI.RadGridView.set_DataSource(Object value)

Many thanks.

GridView

answered on 24 Jul 2018

4 answers

466 views

Select first row when grouping

I have a grid with grouped rows, I call ExpandAllGroups, then I'd like the first row of the first group to be selected. (currently the grid scrolls to display the first row of the datasource, I think).
How could I do that?

GridView

answered on 23 Jul 2018

2 answers

157 views

Get default row Height

I'm changing the Row Height at event RowPaint() according to my needing.

But I need to know the "normal" or "default" row height to apply according to the used theme.

GridView

answered on 23 Jul 2018

1 answer

599 views

Disabled RadButton

I am new to Telerik controls.

I have a radbutton with image, currently when I set the button with ENABLE = FALSE, the image is the same, it is hard to recognize it is Enable or Disable.

When I use regular microsoft button control, the Disabled button is easy to see.

Please advise how to archive it.

Regards,

Patrick

Buttons, RadioButton, CheckBox, etc

answered on 23 Jul 2018

3 answers

131 views

Custom Grouping and Searching

Hi

I followed the following link to implement custom grouping sorting in my app, however after using the search on the property grid the names of the groups revert to the unformatted names (see the attached Image)

https://www.telerik.com/forums/custom-grouping-in-propertygrid

Any Help would be appreciated

PropertyGrid

answered on 23 Jul 2018

4 answers

518 views

Hide Row Indicator in RadGridView for WinForms

HI,
I need to hide the row indicator in my RadGridView.
i am using them in Window Forms.

I need this because the left most column of the grid is transparent and when i do the horizontal scroll, the text appears to go back behind the indicator and hinders the visibility.

I actually wanted to make the opacity of his column, maximum so that it should not allow the user to see whats scrolling behind the indicator.

I am currently using Vista Theme for these controls.

Thanks.

GridView

answered on 23 Jul 2018