Questions on UI for WinForms Forum

8 answers

703 views

[Solved] Problem in winforms radgridview

I populate a radgridview from a class with a method: xxx.DataSource = class.method(); This methos returns a datatable.
The first time it works fine.
When i insert a row into the radgridview and repopulate it with the classes method (xxx.DataSource = class.method();
) it works fine.
But when i update the radgridview and after thet try to repopulate the radgridview, it starts to fire these messageboxes with the error message:

Data Exception
Column 'xxx' does not belong to table Table

What am i missing?

GridView

answered on 08 Feb 2017

1 answer

144 views

Dropdown button menu items UI

When placing a dropdown button in a RadRibbonBar, the Visual Style Builder has a DropDownButtoninRibbon Control Structure element for editing the UI of the button. However, where does one edit the UI for the menu items appearing below the pressed dropdown button that is contained in the RadRibbonBar?

Themes and Visual Style Builder

answered on 08 Feb 2017

4 answers

194 views

[Solved] RadTimePicker Disabled State

Hello,

I'm using UI for WinForms R1 2017 and have observed a problem with the drawing of RadTimePicker when in a disabled state (Enabled = false).

Please see the attached picture. Notice how the RadDateTimePicker control (on the left) has the expected disabled appearance. However, the RadTimePicker control (on the right) does not. Specifically, part of the RadTimePicker editor background is still drawn in a light color when the control is disabled.

Please let me know if there's a workaround for this, and thanks.

Regards,

Mark R.

Calendar, DateTimePicker, TimePicker and Clock

answered on 07 Feb 2017

8 answers

986 views

[Solved] Moving away from ObjectListView

Now that we're including the Telerik UI in our project, we'd like to reduce our reliance on third party controls where possible. I'm looking at replacing ObjectListView and I presume the equivalient would be RadListView.

With ObjectListView the process is:

Define the custom MyClass
Define the columns at design time and associate each with a Property in MyClass
At run time, use SetObjects to set the list content to the run time defined List (of MyClass).

Is there a way to do this in RadListView without needing to maintain an external data source, or manually add each item as a new row in the ListView?

ListView

answered on 07 Feb 2017

1 answer

160 views

[Solved] Node Hittest only on Node direkt

Hallo,

is there any way to only get a direkt right click on a node? The GetElementAtPoint get's the node even if the cursor is outside of the (visible part) of the node but at the same hight (I think this is the same reason why the hottrack reacts outside of the visible part of the node)

I'd use the NodeMouseClick but the event args aren't derived from MouseEventArgs so there is no MousePosition/MouseButton (I think this should be changed)

private void radTreeView1_MouseDown(object sender, MouseEventArgs e)

{

if (e.Button == System.Windows.Forms.MouseButtons.Right)

{

TreeNodeElement el = radTreeView1.ElementTree.GetElementAtPoint(e.Location) as TreeNodeElement;

...

}

So I need to distinguish between a direkt right click on a node and a right click on the treeview (the white part)

Treeview

answered on 07 Feb 2017

1 answer

106 views

[Solved] CompleteDragging XY different than Shape XY

I am getting different XY coordinates on the CompleteDragging event than what the actual shape XY coordinates are (see image file). Any clue how to get the correct XY coordinates? It seems like I am getting the XY of the center of the shape. Below is the code I am using:

private void DragService_CompleteDragging(object sender, PositionChangedEventArgs e)

{

label13.Text = $"{e.NewPosition.X},{e.NewPosition.Y}";

foreach (var shape in radDiagram1.Shapes)

{

var myShape = shape as RadDiagramShape;

if (myShape.Text == _asset.AssetTag)

{

label14.Text = $"{myShape.X},{myShape.Y}";

break;

}

Diagram, DiagramRibbonBar, DiagramToolBox

answered on 07 Feb 2017

1 answer

348 views

Secondary Y axis

I am trying to find the best way to add a secondary Y axis for a line series. An example of this would be a Fahrenheit secondary Y axis for a Celsius primary Y axis. The best way I have figured out so far is to create a dummy series that is not visible and that shares the same X axis and color as the primary axis. The minimum and maximum values are then set based on the ActualRange of the primary axis. This is not ideal because the secondary axis ticks aren't being generated on round numbers.

Is there a better way to do this?

Is there an event that I can use to update the secondary Y axis minimum and maximum when the ActualRange of the primary axis changes?

// Create data table with test data

DataTable dataTable = new DataTable();

dataTable.Columns.Add(new DataColumn("Date", typeof(DateTime) ));

dataTable.Columns.Add(new DataColumn("Temp", typeof(float) ));

dataTable.Rows.Add(new DateTime(2016, 2, 1), 245.0f);

dataTable.Rows.Add(new DateTime(2016, 3, 1), 248.0f);

dataTable.Rows.Add(new DateTime(2016, 4, 1), 238.0f);

// Create line series for test data

LineSeries lineSeries1 = new LineSeries();

lineSeries1.Name = "Temperature";

lineSeries1.Spline = false;

lineSeries1.ValueMember = "Temp";

lineSeries1.CategoryMember = "Date";

lineSeries1.DataSource = dataTable;

// dummy line series for secondary axis

LineSeries dummyLineSeries = new LineSeries();

dummyLineSeries.Name = "Dummy Temperature";

dummyLineSeries.Spline = false;

dummyLineSeries.IsVisible = false;

dummyLineSeries.BorderColor = lineSeries1.BorderColor;

// X Axis definition

DateTimeCategoricalAxis DTcategoricalAxis1 = new DateTimeCategoricalAxis();

DTcategoricalAxis1.PlotMode = AxisPlotMode.OnTicks;

DTcategoricalAxis1.LabelFormat = "{0:MMMyy}";

DTcategoricalAxis1.Title = "Month-Year";

DTcategoricalAxis1.AxisType = Telerik.Charting.AxisType.First;

// Primary Y Axis definition

LinearAxis linearAxis1 = new LinearAxis();

linearAxis1.Title = "Temperature (°C)";

linearAxis1.AxisType = Telerik.Charting.AxisType.Second;

// Secondary Y Axis definition

LinearAxis linearAxis2 = new LinearAxis();

linearAxis2.Title = "Temperature (°F)";

linearAxis2.AxisType = Telerik.Charting.AxisType.Second;

linearAxis2.HorizontalLocation = AxisHorizontalLocation.Right;

// Add Axes to the line series

lineSeries1.HorizontalAxis = DTcategoricalAxis1;

lineSeries1.VerticalAxis = linearAxis1;

dummyLineSeries.HorizontalAxis = DTcategoricalAxis1;

dummyLineSeries.VerticalAxis = linearAxis2;

// Add line series to chart

radChartView1.Series.AddRange( lineSeries1, dummyLineSeries);

// Force secondary axis range to match adjusted

linearAxis2.Minimum = linearAxis1.ActualRange.Minimum * 1.8 + 32.0;

linearAxis2.Maximum = linearAxis1.ActualRange.Maximum * 1.8 + 32.0;

ChartView

answered on 07 Feb 2017

1 answer

89 views

Possible Bug with PrintPreview

I have a need of hiding the richtexteditor, populating it, and then doing a PrintPreview. I have discovered that if the control's "Visible" property is false, it does not work. The document is empty. It also does not work if you dynamically create the control at run-time. Thoughts? Obviously, I can add a control to the form and hide it behind another control, but that's a hack.

Dim foo As New RadRichTextEditor

Dim provider As New HtmlFormatProvider()

foo.Document = provider.Import("<html><body>All Notes for Project Foo<br/><br/></body></html>")

foo.PrintPreview()

RichTextEditor

answered on 07 Feb 2017

5 answers

336 views

[Solved] Custom Editor With Multiline TextBox

Hi,

I've written a Custom Editor with a TextBox and two buttons (I simply made few changes at the code of your CustomEditor Demo), it seem to work fine except for the fact that if I set the Multiline propery of the TextBoxItem to true I cannot change the text anymore (I looks like it became ReadOnly), so I suppose it isn't so simple.

How can I write a custom editor that accept multiline text ?

GridView

answered on 06 Feb 2017

5 answers

199 views

Is there a way to determine if a Cell Value is being trimmed

Hi,

I would like to display a ToolTip for a GridView Cell only if the value of the cell is too large to fit within the column width? The ToolTip would be the complete cell value. Normally, the value shows an ellipse when it is trimmed but I can not find a property to indicate this.

Thanks,
Mike

GridView

answered on 06 Feb 2017