Questions on UI for WPF Forum

1 answer

147 views

I need RadCartesianChart that can show historical data.

Hello. I ask you about real-time chart with viewing of histirical data in http://www.telerik.com/forums/how-to-create-real-time-chart-(radcartesianchart-with-spline-series)-scrolled-or-panned-in-time. You gave me information with example there but this example works poorly. I've tryed to improve the functioning of the chart in the example but to no avail. So I still need RadCartesianChart that can show historical data. Please give me an example of such RadCartesianChart with historical data viewing that works good, if this is possible ofcourse. I need such RadCartesianChart very much. I would be very grateful to you for your help.

ChartView

answered on 01 Mar 2017

1 answer

221 views

Clearing numberic with MVVM approach

Hi simple question, I know you can clear the numeric approach in behind code using something like this

<telerik:RadButton Content="Clear" Command="{Binding ElementName=RMTI,Path=ClearCommand}"/>

But I'm looking for an MVVM approach. Any ideas?

In my viewmodel I would set the NumericTextBox value to null but instead of clearing out, it would go to zero. NumericTextBox Value is of type double?

MaskedInput (Numeric, DateTime, Text, Currency)

answered on 28 Feb 2017

9 answers

674 views

[Solved] Setting ToolWindow size before it's displayed

Hello. I'm trying to use RadDocking in my project, but I am having trouble with floating panes. In my scenario, I want to float a docked pane and to set the floating window size to either specific value or fullscreen, depending on pane content. I need to do it from code-behind.
I've found this solution: http://www.telerik.com/forums/add-maximize-button-to-radpane-header
And the idea begind it works. But it also creates an unwanted side effect. I can see the window changing size twice: first, when it appers on the screen (at this point it has some initial size, like 200x300), and second time, when I change its size in PaneStateChange event handler. If pane contains some rendering-heavy content this double resizing is especially noticeable. So the question is: is there a way to set initial ToolWindow size, before it is actually displayed (and rendered) for the first time?

Docking

answered on 28 Feb 2017

4 answers

248 views

[Solved] Navigation in RadSpreadsheet

Hello,

I have a requirement where user should be able to traverse through the spreadsheet columns vertically using only Tab or Enter Key.
For ex: If I have entered some value in column1, cell 1, when I press Tab, focus should move on to the next cell in the same column1. and I should be able to keep doing this for, suppose, next 1000 rows. Then I would like to start on column2, cell1, and do the same traversal using Tab key or Enter key and so on.
So my question is how do I capture the tab key press event or enter key press event and move the focus on to the next cell below the current cell ( not the cell on the right side) for data entry ?

I would really appreciate the quick response.
Thank you.

Spreadsheet

answered on 27 Feb 2017

4 answers

230 views

Problem to export to excel

regards
I'm working with RadPivotGrid and RadPivotFieldList (WPF), the data comes from a cube olap. I'm trying to export to excel but when I do after a while the application crashes and I get the following exepcion:
ContextSwitchDeadlock was detected
Message: The CLR has been unable to transition from COM context 0x63ef2c8 to COM context 0x63ef438 for 60 seconds. The thread that owns the destination context/apartment is most likely either doing a non pumping wait or processing a very long running operation without pumping Windows messages. This situation generally has a negative performance impact and may even lead to the application becoming non responsive or memory usage accumulating continually over time. To avoid this problem, all single threaded apartment (STA) threads should use pumping wait primitives (such as CoWaitForMultipleHandles) and routinely pump messages during long running operations.

as I can fix, I would give an example please?

PivotGrid

answered on 27 Feb 2017

0 answers

77 views

close edit mode after change is propagated to viewmodel

Hi,

I have GridViewDataColumn with a edit template containing a com:

<telerik:RadButton

Command="{Binding DoSomethingCommand}"

Focusable="False"

</telerik:RadButton>

My button command calls a command hander "MyViewModel.OnDoSomething" method in ViewModel attached to RadGridView row, but I am unable to figure out how to close edit mode after my handler is called. I tried to call CommitEdit() from Click() handler attached to button above. After adding click handler my "MyViewModel.OnDoSomething" is not called anymore.

I could fire new event from MyViewModel.OnDoSomething and intercept this event in View and call CommitEdit from there, but maybe there is a simpler way?

Thanks,

Łukasz

GridView

asked on 27 Feb 2017

1 answer

270 views

load view in pane (mvvm)

Hi,

I want to load some view in content of pane. The pane is create dynamically to doubleclick on the item's panelbar.

My solution have 2 projects. One for view's and one for model views.

The code from doubleclick is:

private void MenuItemDoubleClick(object sender) {

UserMenuTab selectedItem = (sender as UserMenuTab);

string propValueTitlu = selectedItem.Titlu.ToString();

if (propValueTitlu != null) {

OuterDockPanes.Add(new RadPane {

Header = propValueTitlu,

Content = " ???? I want to put here the view ",

Tag = "DocumentHost"

});

}

}

I dont know how cand I upload the solution for better undestanding...

Thank you.

Docking

answered on 27 Feb 2017

4 answers

160 views

[Solved] Demos ClickOnce failed to install

Installing the Demos failed

Please see att. image

General Discussions

answered on 24 Feb 2017

7 answers

410 views

RadRibbonWindow Maximized Window has Margin / wrong position

Hello,

we are using the RadRibbonWindow in our WPF Application. Unfortunately, in the current version (2015.1) of the WPF controls, the RadRibbonWindow has a strange Margin on the right Border when Maximized. Also it seems like, that the content on the left is cut. It feels like the position of the Window is not correct. You can see through to the desktop, even when the Window is maximized.

I tried to override the Template but I couldn't find the Margin causing the problem.

I've also tried to use the new Internal Builds, but it wasn't fixed so far. In the 2014 version of the controls, everything worked fine.

The attached screenshot shows an empty appliction where the bug occures. I've changed my background color to black, so you can see it easily.

Best regards

RibbonView and RibbonWindow

answered on 24 Feb 2017

2 answers

81 views

Why does checkable RadMenuItem not react correctly on DialogResult value if System.Windows.Forms.FolderBrowserDialog is used in WPF MVVM application?

Hello. Just on DialogResult, I'm not wrong! I use System.Windows.Forms.FolderBrowserDialog instance in my WPF MVVM application. Please see the following code from the View Model:

. . . . . . . .

using System.Windows.Forms;

. . . . . . . .

FolderBrowserDialog dialog = new FolderBrowserDialog();

DialogResult res = dialog.ShowDialog();

if (res == DialogResult.OK)

{

this.PathToExcelExportRepository = string.Copy(dialog.SelectedPath);

this.IsTurnOffExportToExcelSelected = false;

this.IsTurnOnExportToExcelSelected = true;

. . . . . . . . .

}

Where IsTurnOffExportToExcelSelected is:

public bool IsTurnOffExportToExcelSelected

{

get { return this._isTurnOffExportToExcelSelected; }

set { this.SetProperty(ref this._isTurnOffExportToExcelSelected, value); }

}

and IsTurnOnExportToExcelSelected is:

public bool IsTurnOnExportToExcelSelected

{

get { return this._isTurnOnExportToExcelSelected; }

set { this.SetProperty(ref this._isTurnOnExportToExcelSelected, value); }

}

Each one of these properties is binding source fore menu item in the View:

<telerik:RadContextMenu.ContextMenu>

<telerik:RadContextMenu>

<telerik:RadMenuItem Header="Turn on export to MS Excel" IsCheckable="True" IsChecked="{Binding IsTurnOnExportToExcelSelected, Mode=TwoWay}"

Command="{Binding TurnOnExportToExcelCommand}"/>

<telerik:RadMenuItem Header="Turn off export to MS Excel" IsCheckable="True" IsChecked="{Binding IsTurnOffExportToExcelSelected, Mode=TwoWay}"

Command="{Binding TurnOffExportToExcelCommand}"/>

</telerik:RadContextMenu>

</telerik:RadContextMenu.ContextMenu>

here the source code of TurnOnExportToExcelCommand. It turns on export to CSV-file of the values of real-time chart data-points:

// This line is in the View Model constructor.

this.TurnOnExportToExcelCommand = new DelegateCommand(this.turnOnExportToExcel);

// This is the command definition in the View Model.

public DelegateCommand TurnOnExportToExcelCommand { get; private set; }

private void turnOnExportToExcel()

{

FolderBrowserDialog dialog = new FolderBrowserDialog();

DialogResult res = dialog.ShowDialog();

if (res == DialogResult.OK)

{

this.PathToExcelExportRepository = string.Copy(dialog.SelectedPath);

this.IsTurnOffExportToExcelSelected = false;

this.IsTurnOnExportToExcelSelected = true;

// Define for which chart (absolute or relative) export to CSV-file is turned on.

if (this.IsAbsoluteSplineChartSelected || this.IsAbsoluteBarChartSelected)

{

// Export of absolute chart data-point to CSV-file:

Interlocked.CompareExchange(ref this._isAbsoluteChartDataBeingExported, 1, 0);

Task.Factory.StartNew(this.peekAbsoluteDataForExportToCsv, TaskCreationOptions.LongRunning);

Task.Factory.StartNew(this.exportToCsvAbsoluteChartPoints, TaskCreationOptions.LongRunning);

// Export absolute chart data-point values is turned on.

GlobalStaticMembers.ChartsExportToExcelStatus[0] = true;

}

else if (this.IsComparativeSplineChartSelected || this.IsComparativeBarChartSelected)

{

// Export of relative chart data-point to CSV-file:

Interlocked.CompareExchange(ref this._isComparativeChartDataBeingExported, 1, 0);

Task.Factory.StartNew(this.peekComparativeDataForExportToCsv, TaskCreationOptions.LongRunning);

Task.Factory.StartNew(this.exportToCsvComparativeChartPoints, TaskCreationOptions.LongRunning);

// Export relative chart data-point values is turned on.

GlobalStaticMembers.ChartsExportToExcelStatus[1] = true;

}

The condition of if-statement above is satisfied if DialogResult is DialogResult.OK. I verify it to set breakpoint in debugger. But if I click 'Cancel' button in the dialog then the debugger doesn't not show next steps but IsChecked property of IsTurnOnExportToExcelSelected menu item is set to true (the status of IsChecked property of TurnOffExportToMSExcel menu item is not changed). Why is TurnOnExportToMSExcel boolean property set to true if DialogResult is Cancel?

Menu

answered on 24 Feb 2017