Questions on UI for WinForms Forum

6 answers

391 views

OS WINXP
C# .Net 4.0
Telerik 2012.2.726.40

I am displaying/editing RadTreeView Nodes in a RadPropertyGrid.
I'm having a problem with the properties being rounded to two decimal places, where I want to support up to four decimal places.

So lets say I have a property named Length:

/**

*\brief Gets or sets the name variable.

*\

*/

[DefaultValue ("New User Home"),

DescriptionAttribute ("Name of this User Home Object."),

CategoryAttribute ("(General)")]

public Double Length

{

get { return Math.Round(_length, 4); }

set { _length = value; }

}

If I enter 23.4567 into the property grid it rounds it to 23.46.

From this msdn thread I found that you can wrap it into a string and handle the number of decimals from there.
The problems I have with this are:

I shouldn't have to use a cheap trick to determine the accuracy of a number.
When I save the node there are now two lines of XML just for one property, the property that is called in my code, and the wrapper.

What is the correct way to determine the rounding performed on all doubles/floats.

PropertyGrid

answered on 18 Oct 2019

6 answers

273 views

Copy grid

Hi.

I am using the "Copy" command from the right-click menu and it works OK in copying selected cells to the clipboard and then pasting into another program.

However, I want to copy the entire grid, including column and row headers.

The headers cannot be selected.

Is there a way to copy the entire grid to clipboard?

PivotGrid and PivotFieldList

answered on 17 Oct 2019

16 answers

3.3K+ views

[Solved] On every new project: Value cannot be null. Parameter name: instance

Trying the trial of the Telerik suite for WinForms in Visual Studi 2013, but any time I try to make new Telerik winforms projects I get the same error message when trying to open the form:

To prevent possible data loss before loading the designer, the following errors must be resolved: 1 Error Why am I seeing this page? Value cannot be null. Parameter name: instance Instances of this error (1) 1. Show Call Stack at System.ComponentModel.TypeDescriptor.AddAttributes(Object instance, Attribute[] attributes)at Microsoft.VisualStudio.Design.VSDesignSurface.CreateDesigner(IComponent component, Boolean rootDesigner)at System.ComponentModel.Design.DesignerHost.AddToContainerPostProcess(IComponent component, String name, IContainer containerToAddTo)at System.ComponentModel.Design.DesignerHost.PerformAdd(IComponent component, String name)at System.ComponentModel.Design.DesignerHost.System.ComponentModel.Design.IDesignerHost.CreateComponent(Type componentType, String name)at System.ComponentModel.Design.Serialization.DesignerSerializationManager.CreateInstance(Type type, ICollection arguments, String name, Boolean addToContainer)at System.ComponentModel.Design.Serialization.DesignerSerializationManager.System.ComponentModel.Design.Serialization.IDesignerSerializationManager.CreateInstance(Type type, ICollection arguments, String name, Boolean addToContainer)at System.ComponentModel.Design.Serialization.TypeCodeDomSerializer.Deserialize(IDesignerSerializationManager manager, CodeTypeDeclaration declaration)at System.ComponentModel.Design.Serialization.CodeDomDesignerLoader.PerformLoad(IDesignerSerializationManager manager)at Microsoft.VisualStudio.Design.Serialization.CodeDom.VSCodeDomDesignerLoader.PerformLoad(IDesignerSerializationManager serializationManager)at Microsoft.VisualStudio.Design.Serialization.CodeDom.VSCodeDomDesignerLoader.DeferredLoadHandler.Microsoft.VisualStudio.TextManager.Interop.IVsTextBufferDataEvents.OnLoadCompleted(Int32 fReload)

General Discussions

answered on 17 Oct 2019

1 answer

97 views

Sound disabled in other applications when webcam active

Sound becomes disabled in other applications (eg youtube, netflix) when webcam is active eg taking snapshot.

Ive observed this using a bluetooth headset and a bluetooth speaker but it doesn't happen if my (HDMI) monitor speaker is outputting sound.

WebCam

answered on 16 Oct 2019

9 answers

585 views

Focus on a specific filter on a grid

Hello,

I want to focus specific filter in a radgridview. I tried beginEdit event but i don't want to select text, just focus.

GridView.MasterGridViewInfo.TableFilteringRow.Cells[index].BeginEdit();

Focus() on the CellElement doesn't work.

How i can do that ?

GridView

answered on 16 Oct 2019

1 answer

401 views

Form Border

Hello Admins,

I'm using one of my form's BorderStyle prperty to none.

When this form is shown no border is displayed.

I want to show only border,

Is it possible to hide only titlebar of the form

or

How to Show the Border/Edges of the form Like in Fluent Theme

Form

answered on 16 Oct 2019

4 answers

296 views

[Solved] Custom fonts vs Teleric First Look demo

I noticed that it was possible to embed custom fonts whilst looking at the webcam firstlook demo source code. I'm rewriting a poorly working web cam module, replacing the old code with your new webcam control.

So I found https://docs.telerik.com/devtools/winforms/telerik-presentation-framework/custom-fonts and generated the following code

/// <summary>

/// Add all fonts to [root]\Properties as embedded resources

/// </summary>

public static class FontFactory

{

private static FontFamily ReadFontFromManifest(string fontFileName, string fontName)

{

#region Code

try

{

var names = Assembly.GetExecutingAssembly().GetManifestResourceNames();

var root = Assembly.GetExecutingAssembly().GetName().Name;

var fontStream = Assembly.GetExecutingAssembly().GetManifestResourceStream($@"{root}.Properties.{fontFileName}");

if (fontStream == null) return null;

ThemeResolutionService.LoadFont(fontStream);

return ThemeResolutionService.GetCustomFont(fontName);

}

catch (Exception err)

{

Log4Net.Log.Error(err);

throw;

}

#endregion

}// function

public static FontFamily Font_Awesome_5_Free_Solid

=> ReadFontFromManifest("Font-Awesome-5-Free-Solid-900.otf", Font_Awsome_5_Free_Solid_FontName);

public static string Font_Awsome_5_Free_Solid_FontName

=> "Font Awesome 5 Free Solid";

}

I tested the code and it does seem to return a font family. But I want to ask a question about your first look please.

I was trying to find in the firstlook solution any code that matched the suggestion for embedding fonts shown in your documentation, but couldn't. The only mention of the awsome font above was in your form1.cs file for the webcam demo. So is it already part of your component source? When I removed the call to my font factory the closebutton.textelement.customfont still showed what appeared to be "Font Awesome 5 Free Solid";

Thanks. Just trying to understand what to expect :)

General Discussions

answered on 16 Oct 2019

17 answers

505 views

[Solved] Theme List Like Demo Application

Hello Admins.

Currently I'm using radMenu for displaying and changing the theme at Run time.

Its working fine, but I want to Display the List like in Demo Forms.(Theme Name + its Color Bar).

How can i achieve this UI behavior .

I have check the demo application but unable to find any help.

Thank you

General Discussions

answered on 15 Oct 2019

3 answers

323 views

Remove SummaryRow in Grouping

Hi support,

I use grouping in my RadGrid with summary rows.

Is it possible to keep the summary row only at the bottom of the grid and not in the grouping?
I only want the total of the data and I don't want to see the subtotal.

Regards,
Nadia

GridView

answered on 15 Oct 2019

5 answers

463 views

[Solved] ChangeParagraphLineSpacing breaks wordwrap

Hi,

I am reading an RTF string from a database and displaying it in a radRichTextEditor. Many of these are multi-line instructions, including many bullet point lists. In order to format this more nicely I wrote the following snippet

private void ConfigureDocumentEditor(RadRichTextEditor editor)

{

var docEditor = new Telerik.WinForms.Documents.Model.RadDocumentEditor(editor.Document);

editor.Document.Selection.SelectAll();

docEditor.ChangeFontSize(8);

docEditor.ChangeParagraphLineSpacing(0.25);

editor.Document.Selection.Clear();

editor.IsReadOnly = true;

}

I also set the LayoutMode to "Flow". The problem that I'm running into is that in some instances the data in the DB is just one long string. When I set ChangeParagraphLineSpacing to a value >= 1.0 the word wrap works nicely. When ChangeParagraphLineSpacing < 1.0 it looks like the attached image. Is there any way to change the spacing so that it applies to paragraph breaks and lists but not the line spacing caused by word wrapping?

Thanks

RichTextEditor

answered on 15 Oct 2019