Questions on UI for WPF Forum

2 answers

242 views

Hello,

I want to display a TimeSpan within a RadGauge. My thoughts were that I should use a NumericScale. However, I cannot seem to get it to work. I want to make a TimeSpan look like a digital clock in the form of hh:mm:ss.

Is there a way to do this with the RadGauge? If so, is there some sample code that demonstrates this?

Basically, I am looking to create something that looks like the clock in the Time Monitoring Tool found in the demos here: http://demos.telerik.com/wpf/

Gauges

answered on 10 Dec 2008

1 answer

161 views

[Solved] Displaying the foreign key value in grid (ComboBoxEditor)

I'd like to display the foreign key value rather than the ID in the combobox editors. I found this example (http://www.telerik.com/community/forums/wpf/gridview/how-to-display-the-foreign-key-value-in-grid.aspx), however with the new Q3 release this approach no longer works.

Is there an new approach for handling this now?

Thanks,
Christopher

GridView

answered on 05 Dec 2008

3 answers

151 views

Increase performance of grouping

Hi All.

I have about a 1500 items of CallItem class in List collection.

This is description of CallItem:

    
            public class CallItem  
        
                {  
        
                    private DateTime callDateTime;  
        
                    public DateTime CallDateTime  
        
                    {  
        
                        get { return callDateTime; }  
        
                        set { callDateTime = value; }  
        
                    }  
        
                    private String calledNumber;  
        
                    public String CalledNumber  
        
                    {  
        
                        get { return calledNumber; }  
        
                        set { calledNumber = value; }  
        
                    }  
        
                    private String logicCall;  
        
                    public String LogicCall  
        
                    {  
        
                        get { return logicCall; }  
        
                        set { logicCall = value; }  
        
                    }  
        
                    private Int64 callDuration;  
        
                    public Int64 CallDuration  
        
                    {  
        
                        get { return callDuration; }  
        
                        set { callDuration = value; }  
        
                    }  
        
                    private Double costWithTaxes;  
        
                    public Double CostWithTaxes  
        
                    {  
        
                        get { return costWithTaxes; }  
        
                        set { costWithTaxes = value; }  
        
                    }  
        
                    private Double costWithDiscount;  
        
                    public Double CostWithDiscount  
        
                    {  
        
                        get { return costWithDiscount; }  
        
                        set { costWithDiscount = value; }  
        
                    }  
        
                    private String abonentNumber;  
        
                    public String AbonentNumber  
        
                    {  
        
                        get { return abonentNumber; }  
        
                        set { abonentNumber = value; }  
        
                    }  
        
                    public CallItem(String abonentNumber, DateTime callDateTime, Int64 callDuration, String calledNumber, Double costWithDiscount, Double costWithTaxes, String logicCall)  
        
                    {  
        
                        this.abonentNumber = abonentNumber;  
        
                        this.callDateTime = callDateTime;  
        
                        this.callDuration = callDuration;  
        
                        this.calledNumber = calledNumber;  
        
                        this.costWithDiscount = costWithDiscount;  
        
                        this.costWithTaxes = costWithTaxes;  
        
                        this.logicCall = logicCall;  
        
                    }  
        
                }

I geting all records and bindind they to GridView like this:

    
            List<CallItem> items = GetAllItems();  
        
            dataGridView.ItemsSource = items;  
        
            dataGridView.CreateFilterDescriptions();

And when I (or user) drag and dropping column (for example AbonentNumber) on grouping panel I need to waiting about 35 seconds.

if I heed to waiting about 35 seconds when I need grouping 1500 records then how long I need to waiting if I must grouping about 15000 records or 150000 records?

How i can increase performance of grouping in GridView? Or may be for my task I dont need to use GridView and grouping?

GridView

answered on 05 Dec 2008

3 answers

431 views

[Solved] When binding, I sometimes get "Exception has been thrown by the target of an invocation"

This has happened on a couple of my WPF pages that use the GridView. I select an item on my list which populates some textboxes. I update those textboxes, click "Update" and then reload the GridView. Reloading the GridView consists of re-retrieving the data and setting the ItemsSource. On this particular page I have, it binds properly the first time, but all subsequent re-binds I get this. Any ideas what might be happening?

GridView

answered on 05 Dec 2008

3 answers

331 views

[Solved] Vertically Stretch GridView

Hello

I have a WPF GridView with Parent / Child data and would like the GridView to fill the space with as much as possible.

In my test scenario, I have 2 parents. The first parent has approx 1200 records, the second parent has about 4 records.

I have about 50% of the page as white space, though the horizontal scrollbar is at the very bottom of the page as it should be.

I have triad a VerticalAlignment="Stretch" and VerticalContentAlignment="Stretch" with no change.

Any ideas for the resolution is appreciated.

Thank you for great products.

GridView

answered on 04 Dec 2008

5 answers

612 views

Turning animation off

What is the best way to completely turn animation off? I tried setting all of the properties to TimeSpan of zero, as well as setting AnimationSettings to null. My window has 23 charts on the screen when it loads, each with a bar and line series. I still see an odd flicker when the window loads. It looks like it briefly displays the bar and line pieces in various places, then it positions and sizes everything (after that it looks fine...this happens in about a second). Maybe the animation is still there, but it is trying to happen very fast.

Chart

answered on 03 Dec 2008

1 answer

149 views

Animation Errors in DataGrid

Hi,

I am receiving (quite frequently) the following in my Project Output Screen when using the DataGrid for WPF

    
            System.Windows.Media.Animation Warning: 6 : Unable to perform action because the specified Storyboard was never applied to this object for interactive control.; Action='Stop'; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='14445493'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; TargetElement='Telerik.Windows.Controls.GridView.GridViewExpandableRow'; TargetElement.HashCode='14788679'; TargetElement.Type='Telerik.Windows.Controls.GridView.GridViewExpandableRow'

and

    
            System.Windows.Media.Animation Warning: 6 : Unable to perform action because the specified Storyboard was never applied to this object for interactive control.; Action='Stop'; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='14445493'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; TargetElement='Telerik.Windows.Controls.GridView.GridViewRow'; TargetElement.HashCode='1651401'; TargetElement.Type='Telerik.Windows.Controls.GridView.GridViewRow'

Is there a way to resolve this. I would really prefer that it didn't happen.

Cheers

Justin

GridView

answered on 02 Dec 2008

1 answer

166 views

Collapsing all group rows.

Hi All!

How I can collapsing all groupHeaders rows by programming grouping?

Source code of grouping:

    
                        dataGridView.GroupDescriptions.Clear();  
        
                        Telerik.Windows.Data.RadGroupDescription desc = new Telerik.Windows.Data.RadGroupDescription("LogicCall");  
        
                        Telerik.Windows.Data.SumFunction funcCallDuration = new Telerik.Windows.Data.SumFunction("CallDuration", "CallDuration", "Duration:");  
        
                        desc.AggregateFunctions.Add(funcCallDuration);  
        
                        dataGridView.GroupDescriptions.Add(desc);

PS. May I collapsing all groupHeader when user drag'n'drop fields to the grouping panel?

GridView

answered on 01 Dec 2008

1 answer

207 views

My own AggregateFunction

Hello!

I have a table with time of call in seconds.
I grouping my table and add a SumFunction.
All works great!

But I need display result of SumFunction like this: HH:MM:SS where HH - hours, MM - minutes and SS - seconds.

Can you tell me how to do it?

I can create inheritance class from SumFunction like this:

    
            public class mF : Telerik.Windows.Data.SumFunction  
        
                {  
        
                    public mF()  
        
                    {  
        
                    }  
        
                    public mF(string propertyName, string calculationField, string caption)  
        
                    {  
        
                        base.Name = propertyName;  
        
                        base.SourceField = calculationField;  
        
                        base.Caption = caption;  
        
                    }  
        
                    private String GetTime(Decimal totalSeconds)  
        
                    {  
        
                        Int32 hours = (Int32)Math.Floor((double)totalSeconds / (double)3600);  
        
                        Int32 minutes = (Int32)Math.Floor((double)(totalSeconds - (hours * 3600)) / (double)60);  
        
                        Int32 seconds = (Int32)totalSeconds - (hours * 3600) - (minutes * 60);  
        
                        return hours.ToString() + ":" + minutes.ToString() + ":" + seconds.ToString();  
        
                    }  
        
                    public override Telerik.Windows.Data.AggregateResult Calculate(Telerik.Windows.Data.GroupRecord targetGroup)  
        
                    {  
        
                        Telerik.Windows.Data.AggregateResult result = base.Calculate(targetGroup);  
        
                        result.Value = GetTime(Convert.ToDecimal(result.Value, System.Globalization.CultureInfo.CurrentCulture));  
        
                        return result;  
        
                    }  
        
                }

But this class properly work only if I have 1 grouping.
If I add another one grouping i have exception (what it was necessary to expect, because format HH:MM:SS SumFunction cant convert to Decimal).

Please, help.

GridView

answered on 01 Dec 2008

1 answer

131 views

[Solved] Error while building Examples Solution

Hi,

The Visual Studio C# Examples Solution is not buildable.
The first error is in CarDashboard.Example.xaml.cs (Line #91):
- no overload for method 'Begin' takes '0' arguments

The C# Samples application crashes also after a few seconds.

My Environment:
- CLR3.5
- VS2008SP1
- Silverlight 2.0
- SQL Server 2005
- Telerik Build 2008.3.1105.35

Btw. The online WPF (Silvelright) demo does crash while switching from one sample to another.

Cheers,
Jani

General Discussions

answered on 01 Dec 2008