Questions on UI for WinForms Forum

2 answers

835 views

[Solved] Copy a Cell throws an exception

Hi Guys

I can't work out why , but every cell in every grid in my application ( different forms and Grids) all throw an exception when you try to copy a cell.

This happens for both the right click, select copy , or with Ctrl C

System.Runtime.InteropServices.COMException occurred
Message: Exception thrown: 'System.Runtime.InteropServices.COMException' in System.Windows.Forms.dll
Additional information: Invalid FORMATETC structure (Exception from HRESULT: 0x80040064 (DV_E_FORMATETC))

Been googling like mad , found the info about copy events for the grid. These seem to fire (3 times each for each format) and then the exception happens. Even calling cancel in the event or trying to format the value returned still causes the exception.

I am using version v4.0.30319 , but I don't see any fixes in later versions for this.

Some trouble shooting ideas would be greatly appreciated

Regards

Rob

GridView

answered on 28 Oct 2020

3 answers

504 views

Themes for WinForms

Hello,

I'm using RadWinForms Controls version 2018.1.220.40, windows 10 64 bit, Visual Studio 2017 c#. When I create a new project the default form it creates the theme will never apply to. I have tried deleting this form and adding a new one but with the same result. I have deleted it several times added new forms and still the same result. It appears that what ever form it calls first the theme will not apply to it. I have attempted to add the theme to the form in code also same result.

Thanks in advance.

Themes and Visual Style Builder

answered on 27 Oct 2020

1 answer

295 views

Theme changing events?

Hello,

Ive built a Winforms RadForms application with VB.Net. The application contains several forms that contains several rad controls. The form contains several buttons when clicked changes the theme. But it takes around 3-4 seconds for the theme to change. Now what I want to achieve is the application must show a message box with the message- "Theme Changed" when the theme has changed. I was wondering if there are any events that can be fired during a theme change and found one event named "ThemeNameChanged". I set it up like this:

Private Sub (source as Object, args As ThemeNameCahngedEventArgs) Handles Me.ThemeNameChanged

Msgbox("Theme Changed")

EnsSub

Then I switch the theme with the click of a button:

Private sub Button1_Click(...) Handles Button1.Click

ThemeResolutionService.ApplicationThemeName = "TelerikMetroBlue"

End Sub

But when click Button1 the theme changes but the message is not displayed once the theme has changed. So How Do I dsiplay a message when the theme has changed?

General Discussions

answered on 26 Oct 2020

3 answers

687 views

Positioning LabelText on Donut Chart

Hi,

I want to set my Label Text next to LabelLine on Donut Chart.

i use this code to create my chart, but somehow the label text placed on top of label line, not next to it (see attachment for my desired result)

Thank you in advance

private void CreateRadChartDonut(ref string p_strFileName)

{

RadChartView chartDonut = new RadChartView();

//chartDonut = radChartView1;

chartDonut.Size = radChartView1.Size;

chartDonut.Dock = DockStyle.Fill;

chartDonut.LabelFormatting += radChartView_LabelFormatting;

chartDonut.View.Margin = new Padding(65); //set pie padding

chartDonut.AreaType = ChartAreaType.Pie; //set to pie chart type

chartDonut.Series.Clear();

#region Config New Chart Series

Telerik.WinControls.UI.DonutSeries smartPie = new Telerik.WinControls.UI.DonutSeries();

smartPie.Name = "Series";

smartPie.InnerRadiusFactor = 0.35f; //setting inner radious doughnut so it can change as Doughnut Chart

smartPie.LabelMode = PieLabelModes.Horizontal;

smartPie.ShowLabels = true; //show label text

smartPie.DrawLinesToLabels = true; //show label line connector

smartPie.LinesToLabelsColor = Color.FromArgb(197, 158, 115); //set label line connector color

smartPie.SyncLinesToLabelsColor = false; //set true if we want to set label line color the same as series color

//set angle range starting position

AngleRange range = smartPie.Range;

range.StartAngle = 250;

smartPie.Range = range;

smartPie.LabelsOffsetFromCenter = 1.56f;

#endregion

#region Generate Data

List<DataChart> lData = new List<DataChart>();

lData.Add(new DataChart("Savings", 50));

lData.Add(new DataChart("Deposit", 25));

lData.Add(new DataChart("BancaAssurance", 12.5));

lData.Add(new DataChart("MutualFund", 12.5));

#endregion

//add slice area

foreach (DataChart d in lData)

{

PieDataPoint point = new PieDataPoint(Convert.ToDouble(d.Value), d.Name);

point.Label = d.Name.ToUpper();

point.Label = string.Format("{0} | {1}%{2}{3} {4}", d.Name.ToUpper(), d.Value, Environment.NewLine, "IDR", Convert.ToDouble(d.ValueRp).ToString("N0"));

smartPie.DataPoints.Add(point);

}

chartDonut.Series.Add(smartPie);

#region Setting Series Slice Color

chartDonut.Series[0].Children[0].BackColor = Color.FromArgb(193, 152, 105);

chartDonut.Series[0].Children[1].BackColor = Color.FromArgb(207, 175, 140);

chartDonut.Series[0].Children[2].BackColor = Color.FromArgb(221, 198, 173);

chartDonut.Series[0].Children[3].BackColor = Color.FromArgb(235, 221, 206);

chartDonut.Series[0].IsVisible = true;

#endregion

ExportChart(ref p_strFileName, chartDonut, new Size(690, 360));

}

ChartView

answered on 26 Oct 2020

7 answers

454 views

Adding ButtonElement to the StripButtons

Hi,

I have already managed to add a Help Button to my BaseForm (see attached image).
I would love to have the same little help icon with the Click handler added just before the Scroll Buttons on the RadPageView Strip Element.
Here is the code for the Help Button:

RadButtonElement _btnHelp = new RadButtonElement();
_btnHelp.ShowBorder = false;
_btnHelp.Image = global::labs.STAR.App.Properties.Resources.helpicon;
_btnHelp.ClickMode = ClickMode.Press;
_btnHelp.Click += _btnHelp_Click;
this.FormElement.TitleBar.SystemButtons.Children.Insert(0, _btnHelp);

thx in advance,
Darko

PageView

answered on 25 Oct 2020

13 answers

752 views

[Solved] ListView change cell forecolor

I have a list view that has numbers in the cells. If the number is negative I would like the text to turn red.

Is the list view capable of this?

I can change the row text color, but not a single cell.

I am also using a ListViewDataItem variable as well.

ListView

answered on 24 Oct 2020

5 answers

601 views

Multiple stacked bar series

Is it possible to create a chart like the attached image?

The chart i am trying to create currently has a stacked bar for enquiries and orders for each month of a year, i want to add another year to this chart to compare so would need another stacked bar for each month in the new year.

Thanks

ChartView

answered on 23 Oct 2020

2 answers

686 views

Changing background/unfilled bar color

Hello,

The gray background of the progress bar seems to be theme specific, is it possible to change it to white/transparent without a custom theme?

Attaching a screen shot to indicate the background fill in question.

ProgressBar

answered on 23 Oct 2020

1 answer

138 views

[Solved] Multiple currency in Summary row

Hi,

I have multiple rows. Each row has a different currency. How to find sum in Indian currency using summary row.

please find attached.

waiting for your favorable response.

Thanks.

GridView

answered on 23 Oct 2020

1 answer

154 views

Add button to Image editor side bar?

Hello Telerik Support Team,

I'm trying to add a custom button for the RadImageEditor for my application. When I try to do so using

RadMenuItem cst = new RadMenuItem("Item");

radImageEditor1.ImageEditorElement.CommandsElement.CommandsStackEleemnt.Children.Add(cst);

This does get me the button I need, but I am unable to extend add an event handler to this button.

However If I were to create a button and add it to the element by extending RadMenuItem to override the onclick event within a custom class like so:

CustomMenuItem custom = new CustomMenuItem("CustomMenuItem");

radImageEditor1.ImageEditorEleemnt.CommandsElement.CommandsStackElement.Children.Add(custom);

This will get me a flat generic box the form in which I am unable to modify the style of the button to fit with the rest of the form, however this approach will allow me to define my event handler.

How can I go about it to create a proper button within the image editor side bar (to clarify the side bar below the command elements, and be able to setup the onclick to run the function needed as intended?

Thanks,

ImageEditor

answered on 22 Oct 2020