Questions on UI for WPF Forum

2 answers

122 views

How do i know connection contains point?

Hello,

I'm sorry to leave so many questions.

Here's the question.

I'd like to find out if the point above the diagram is within the connection.

Other DiagramItems, such as Shape, could calculate to Shape.Bounds.Contains(point).

However, the connection is a line, so if you calculate it as Bounds, there is a problem that i can't measure properly.

I want to get a bool value for the point above the connection or, if possible, within an interval between 1 and 5 around the connection line.

Connection.Geometry has a different position value and connection.Geometry doesn't have been activated by fillcontains or stalkcontains.

Diagram

answered on 26 Feb 2020

8 answers

167 views

OpenStreetMap and the Layer property

Hello,

When setting the Layer property by code, it works as expected. But, when a layer is selected by the user, the Layer property doesn't change!

Map

answered on 25 Feb 2020

7 answers

583 views

RichTextBox crashes on character input with IME input mode switching

Hello,

Typing characters with switching IME input mode will crash your RichTextBox sample application.
In 2017.2.614 the process is killed and in 2020.1.115 an exception is thrown.

Could you tell us a solution to this problem?
Also, do you plan to fix your components for this problem?

Reproduction steps:
1. Start editing rich text
2. Switch IME input mode to Hiragana
3. Switch IME input mode to AlphanumericHalfWidth
4. Enter "," (comma) by key operation
5. Switch IME input mode to Hiragana
6. Enter any characters by key operation
⇒ The application crashes

Exception information:
Value cannot be null.
Parameter name: insertIMETextCommandContext

Best regards,

RichTextBox

answered on 25 Feb 2020

2 answers

468 views

UI becomes very slow to show tooltips when loading massive amount of data

Hello Admin,

I am now using RadCartesianChart's LineSeries to show tooltip. But when loading massive amount of data about 18866 record, UI becomes very slow to show tooltips and finally becomes freeze. Could you please help me how to solve this issue? Thanks.

ChartView

answered on 24 Feb 2020

3 answers

331 views

GridViewDataColumn set implicit style

Hi,

I have troubles to set a implicit style to GridViewDataColumn.

For all grid view columns i want to set the style to without

- TextTrimming="CharacterEllipsis"

- TextWrapping="WrapWithOverflow"

I tried with <Style TargetType="telerik:GridViewDataColumn" BasedOn="{StaticResource GridViewDataColumnStyle}">

Any suggestions?

Thank you in advance

GridView

answered on 24 Feb 2020

2 answers

2.0K+ views

Main window doesn't get focus

Hello,

When I use a RadSplashScreen at the launch of my application, the application's main window doesn't receive focus and appears behind other windows. I've seen a reference to this type of behavior on another thread regarding RadWindow (https://www.telerik.com/forums/mainwindow-losts-focus-after-child-radwindow-is-closed), but the solution there doesn't seem applicable to this control.

I created a sample application (https://github.com/3milio/RadSplashScreenHidingMainWindow) with VS 2017 following your getting started guide. Mind trying it out and seeing if I'm missing a step? For me, when I hit F5 in the debugger to run it the splash screen appears on top of it but then when the main window gets instantiated it hides behind other programs.

Also, when I first cloned the repo and ran it in the debugger it didn't demonstrate this behavior. But any time after that, it did. That includes running it with the Release configuration, as well as simply running the .exe from Windows Explorer.

Thanks,

Emilio

SplashScreen

answered on 22 Feb 2020

1 answer

182 views

How to access row details while exporting?

Dear Developers,

Here's a code which exports a RadGridView:

```
private void grid1_ElementExported(object sender, GridViewElementExportedEventArgs e)
{
if (e.Element == ExportElement.Row)
{
GetData_Result obj = e.Context as GetData_Result;
if (obj != null)
{
e.Writer.Write(String.Format(@"<tr><td colspan=""{0}"">", grid1.Columns.Count));
// Here's row details for row being exported
e.Writer.Write("</td></tr>");
}
}
}

private void bExport_Click(object sender, RoutedEventArgs e)
{
SaveFileDialog dialog = new SaveFileDialog()
{
DefaultExt = extension,
Filter = String.Format("{1} files (*.{0})|*.{0}|All files (*.*)|*.*", "xls", "Excel"),
FilterIndex = 1
};
if (dialog.ShowDialog() == true)
{
using (Stream stream = dialog.OpenFile())
{
grid1.Export(stream,
new GridViewExportOptions()
{
Format = ExportFormat.Html, // Is it possible to use another format in this situation?
ShowColumnHeaders = true,
ShowColumnFooters = true,
ShowGroupFooters = false
});
}

Process.Start(new ProcessStartInfo(dialog.FileName));
}
}
```

RowDetails is a DataTemplate which is filled by a method below when "+" button is clicked.

```

private void grid1_RowDetailsVisibilityChanged(object sender, Telerik.Windows.Controls.GridView.GridViewRowDetailsEventArgs e)
{
if (e.Visibility != Visibility.Visible)
return;

GetDataD_Result data = e.Row.Item as GetDataD_Result;

dvm = new DetailsViewModel(data.Id);
e.DetailsElement.DataContext = dvm;
}

```

So, is possible to get an access to this DataTemplate of RwoDetails while exporting for each row?

Thank you!

Best regards

General Discussions

answered on 20 Feb 2020

1 answer

279 views

Styling GridViewSelectColumn in RadGridViews

Greetings,

I am trying to set the GridView style.

Need to set the Grid view Row and GridViewSelectColumn disabled as per the binding value. And at the same time need red background color for disabled row.

I am trying to achieve by applying style but it is now showing the expected result.

<telerik:RadGridView.RowStyle>
<Style TargetType="telerik:GridViewRow">
<Setter Property="IsEnabled" Value="{Binding IsCheckboxEnabled }"></Setter>
<Setter Property="Background" Value="{Binding IsCheckboxEnabled, Converter={StaticResource BoolConverter}}"></Setter>
</Style>
</telerik:RadGridView.RowStyle>

where IsCheckboxEnabled is conditional value true/false with the help of which i want row to be disabled. And Background should be red.

Converter={StaticResource BoolConverter} is used to return new SolidColorBrush(Colors.Red);

But, it is not working as expected. Showing disabled rows only for alternate rows in the grid even if IsCheckboxEnabled is property assigned as false.

Not getting proper way to disable check box and disable row with red background.

Could you please advise here.

Thank you.

GridView

answered on 20 Feb 2020

14 answers

762 views

Unhandled Exception Causing Application Crash

Hello,

I am currently using version 2011.3.1220.40 of the GridView control, and I have been receiving this exception at one of our client sites. Unfortunately, this is something I have not been able to reproduce myself, nor am I getting adequate information about what the user is doing when it occurs. I'm hoping this is something that someone has possibly seen before, or can identify from the stack trace. I'm guessing it is something that is corrupt in their environment, and I have only seen this happen on two out of the ten machines they have in use, I'm hoping to be able to get more details about these specific machines soon.

Any help would be greatly appreciated.

=> System.Windows.Markup.XamlParseException: The invocation of the constructor on type 'Telerik.Windows.Controls.GridView.FrozenColumnsSplitter' that matches the specified binding constraints threw an exception. ---> System.IO.IOException: The file exists.

at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)

at System.IO.__Error.WinIOError()

at System.IO.Path.GetTempFileName()

at System.Windows.Input.Cursor.LoadFromStream(Stream cursorStream)

at System.Windows.Input.Cursor..ctor(Stream cursorStream)

at Telerik.Windows.Controls.GridView.GridViewCursors.get_RefreezeCursor()

at Telerik.Windows.Controls.GridView.FrozenColumnsSplitter..ctor()

at System.Xaml.Schema.XamlTypeInvoker.DefaultCtorXamlActivator.InvokeDelegate(Action`1 action, Object argument)

at System.Xaml.Schema.XamlTypeInvoker.DefaultCtorXamlActivator.CallCtorDelegate(XamlTypeInvoker type)

at System.Xaml.Schema.XamlTypeInvoker.DefaultCtorXamlActivator.CreateInstance(XamlTypeInvoker type)

at System.Xaml.Schema.XamlTypeInvoker.CreateInstance(Object[] arguments)

at MS.Internal.Xaml.Runtime.ClrObjectRuntime.CreateInstanceWithCtor(XamlType xamlType, Object[] args)

at MS.Internal.Xaml.Runtime.ClrObjectRuntime.CreateInstance(XamlType xamlType, Object[] args)

--- End of inner exception stack trace ---

at System.Windows.Markup.XamlReader.RewrapException(Exception e, Uri baseUri)

at System.Windows.FrameworkTemplate.LoadTemplateXaml(XamlReader templateReader, XamlObjectWriter currentWriter)

at System.Windows.FrameworkTemplate.LoadTemplateXaml(XamlObjectWriter objectWriter)

at System.Windows.FrameworkTemplate.LoadOptimizedTemplateContent(DependencyObject container, IComponentConnector componentConnector, IStyleConnector styleConnector, List`1 affectedChildren, UncommonField`1 templatedNonFeChildrenField)

at System.Windows.FrameworkTemplate.LoadContent(DependencyObject container, List`1 affectedChildren)

at System.Windows.StyleHelper.ApplyTemplateContent(UncommonField`1 dataField, DependencyObject container, FrameworkElementFactory templateRoot, Int32 lastChildIndex, HybridDictionary childIndexFromChildID, FrameworkTemplate frameworkTemplate)

at System.Windows.FrameworkTemplate.ApplyTemplateContent(UncommonField`1 templateDataField, FrameworkElement container)

at System.Windows.FrameworkElement.ApplyTemplate()