Questions on UI for WPF Forum

0 answers

86 views

MVVM Modell for RadGrid-view

Hi,

is there any example for a dynamic mvvm Model based on a sql-database?

thanks
regards
ww

General Discussions

asked on 17 Feb 2012

3 answers

202 views

Performance problems

Hi,

How I can improve the radChart performance when I do a (Window) resizing or zooming ?

I need to show several lineseries with several thousand of points. I'm okay of loading the data to series (it takes around 2-3sec) but after that if I wan't to do windows resizing or zooming, it's lock the UI and takes more than 10sec (if I have 5 series or more loaded to screen) to refresh the screen !!??

I really need to show the actual data so I cannot use the SamplingThreshold - feature

Can I disable redraw or something during the zooming/resizing?

Here's the full code of my demo project.

public partial class MainWindow : Window

{

private DataTable dt = null;

public MainWindow()

{

InitializeComponent();

radChart1.DefaultView.ChartArea.EnableAnimations = false;

radChart1.DefaultView.ChartLegend.Visibility = System.Windows.Visibility.Collapsed;

//radChart1.SamplingSettings.SamplingFunction = ChartSamplingFunction.Average;

radChart1.SamplingSettings.SamplingThreshold = 0;

radChart1.DefaultView.ChartArea.AxisX.DefaultLabelFormat = "HH:mm:ss";

radChart1.DefaultView.ChartArea.ZoomScrollSettingsX.ScrollMode = ScrollMode.ScrollAndZoom;

radChart1.DefaultView.ChartArea.AxisX.AutoRange = false;

radChart1.DefaultView.ChartArea.AxisX.IsDateTime = true;

radChart1.DefaultView.ChartArea.AxisX.MinValue = DateTime.Now.ToOADate();

radChart1.DefaultView.ChartArea.AxisX.MaxValue = DateTime.Now.AddMinutes(5000).ToOADate();

}

private void button2_Click(object sender, RoutedEventArgs e)

{

dt = CreateDataTable("SERIES_" + radChart1.SeriesMappings.Count.ToString());

MessageBox.Show("Data generated for series: " + "SERIES_" + radChart1.SeriesMappings.Count.ToString());

AddNewSeries("SERIES_" + radChart1.SeriesMappings.Count.ToString());

}

private void AddNewSeries(String tag)

{

AxisY axisY = new AxisY();

axisY.AxisName = tag;

axisY.Title = tag;

axisY.DefaultLabelFormat = "#VAL{#,##0.00}";

axisY.AutoRange = false;

axisY.MinValue = 0;

axisY.MaxValue = 200;

axisY.Step = 10;

Style customAxisYStyle = this.Resources["CustomAxis"] as Style;

axisY.AxisStyles.AxisLineStyle = customAxisYStyle;

axisY.AxisStyles.TickLineStyle = this.Resources["AxisYTickStyle"] as Style;

axisY.AxisStyles.MinorTickLineStyle = this.Resources["AxisYMinorTickStyle"] as Style;

axisY.AxisStyles.ItemLabelStyle = this.Resources["ItemLabelStyle"] as Style;

axisY.AxisStyles.TitleStyle = this.Resources["AxisTitleStyle"] as Style;

if (radChart1.DefaultView.ChartArea.AxisY.AxisName == "")

{

radChart1.DefaultView.ChartArea.AxisY = axisY;

}

else

{

radChart1.DefaultView.ChartArea.AdditionalYAxes.Add(axisY);

axisY.Visibility = System.Windows.Visibility.Collapsed;

}

LineSeriesDefinition seriesDef = new LineSeriesDefinition();

seriesDef.ShowItemLabels = false;

seriesDef.ShowPointMarks = false;

seriesDef.ShowItemToolTips = false;

seriesDef.SeriesName = tag;

SeriesMapping m1 = new SeriesMapping();

m1.ItemMappings.Add(new ItemMapping() { DataPointMember = DataPointMember.YValue, FieldName = tag, FieldType = typeof(double) });

m1.ItemMappings.Add(new ItemMapping() { DataPointMember = DataPointMember.XValue, FieldName = tag + "_TS", FieldType = typeof(DateTime) });

m1.SeriesDefinition = seriesDef;

m1.LegendLabel = tag;

m1.SeriesDefinition.AxisName = axisY.AxisName;

m1.ItemsSource = dt;

radChart1.SeriesMappings.Add(m1);

}

DataTable CreateDataTable(String tagName)

{

DataTable dt = new DataTable();

dt.Columns.Add(new DataColumn(tagName, typeof(Double)));

dt.Columns.Add(new DataColumn(tagName + "_TS", typeof(DateTime)));

Random r = new Random(Environment.TickCount);

for (int i = 0; i < 5000; i++)

{

DataRow dr = dt.NewRow();

if (radChart1.DefaultView.ChartArea.HasItems)

dr[tagName] = r.Next(1, 100);

else

dr[tagName] = r.Next(1, 100);

dr[tagName + "_TS"] = DateTime.Now.AddMinutes(i);

dt.Rows.Add(dr);

}

return dt;

}

Chart

answered on 17 Feb 2012

2 answers

74 views

Content of pane not shown when settings IsHidden to false

Hi!

To show / hide a pane, I set the IsHidden property to either true or false, this has always worked.

But with the latest release, I get some strange behaviour. If the pane is starting out as hidden (IsHidden = true) when I start the application and the user later changes this through a command (IsHidden = false), the pane is expanded, but without any content (ie the grid inside is not shown).

Am I doing something wrong?

Docking

answered on 17 Feb 2012

2 answers

114 views

Exit new row without saving

Hi,

new empty row is shown after I click on "Click here to add new item" on my RadGridView. When I press Escape twice, exception is thrown:

RowNotInTableException was unhandled by user code:
This row has been removed from a table and does not have any data. BeginEdit() will allow creation of new data in this row.

My RadGridView is filling by DataContext from DataSet and contains my definitions for EventHandlers: BeginningEdit, CellValidating, RowValidating, RowEditEnded and Deleting.

How can I exit and close this new row without saving and validating all cells?

Thanks,
Maros

GridView

answered on 17 Feb 2012

2 answers

313 views

Standard Contains Filter instead of IsEqualTo

Is it possible to set the Filter to COntains standard instead of IsEqualTo.

I tried the following

<telerikData:FilterDescriptor Member="Country"
Operator="Contains" />

But when I then open the filter menu it is back in IsEqualTo

GridView

answered on 17 Feb 2012

6 answers

419 views

Custom labels on markers

Hello all,

Can someone point me out to the correct direction of putting a custom label on to a Marker ? For example, I have three locations on the map and I want to associate each of these locations (marker) with some custom information.

Thanks

Map

answered on 17 Feb 2012

1 answer

84 views

Cue text in Drag/Drop RowReorder

I'm looking at the GridView RowReorder demo, and I noticed something.

When I drag a row, I see a two-line tooltip-like box. The first line provides info about the item being dragged and the second line info about the item it would be inserted before or after, if it was dropped at that moment.

I've figured out how to configure what is displayed in the second line of the tooltip, using the DragCueActionContentTemplate and DragCueTooltipContentTemplate properties of the RowReorderBehavior class.

But I've not been able to figure out how to configure what is displayed in the first line of the tooltip, the info about the item being dragged. It seems to be the result of Item.ToString(), which is usually not appropriate.

Is there a way of providing a template for the dragged item?

GridView

answered on 17 Feb 2012

1 answer

322 views

RadRichTextBox as Xps File Viewer

Before I do a bunch of work, I thought I'd verify a statement I've heard in other (older) posts.

I need to be able to open and print Xps files from a WPF application. Does the RTB fully support this? Also, these are the only functions we want available. So, is there a way to hide the RTB tool bar except these functions?

RichTextBox

answered on 17 Feb 2012

3 answers

93 views

Linear scale : Apply to right and left sides of Linear Bar

Hi All,

I am trying to apply linear scale to the left and right side of the Linear Bar.. In my linear gauge I want scale to appear like this:

Scale LinearBar Scale But when I am taking two scales it is not showing any error as well as no output.. :(

Can anyone help?? Its urgent.. Please guys try this one..

Regards,
Swati

General Discussions