Questions on UI for WPF Forum

3 answers

91 views

Gap between content image & its text in html

Gap between content image & its text is not correctly shown in html...

RichTextBox

answered on 09 May 2012

9 answers

528 views

GridView CellTemplate Binding Errors

Hello Telerik,

This is probably a silly question with an obvious answer - but I am having issues with my CellTemplate content binding...

<telerik:RadGridView x:Name="GridViewDetailAC"

AutoGenerateColumns="False"

AlternateRowBackground="White"

AlternationCount="2"

AllowDrop="True"

CanUserSelect="True"

CanUserDeleteRows="False"

CanUserInsertRows="False"

CanUserResizeColumns="True"

EditTriggers="None"

Grid.Row="1"

Grid.Column="0"

Grid.ColumnSpan="4"

HorizontalGridLinesBrush="SlateGray"

ItemsSource="{Binding XXXX}"

RowIndicatorVisibility="Collapsed"

RowHeight="26"

SelectedItem="{Binding Path=SelectedXXXX,

NotifyOnSourceUpdated=True,

UpdateSourceTrigger=PropertyChanged}"

SelectionMode="Single"

SelectionUnit="FullRow"

ShowColumnFooters="False"

ShowGroupPanel="False"

ShowColumnHeaders="True"

VerticalGridLinesBrush="Transparent">

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn Header="Vendor"

Width="Auto"

TextAlignment="Left"

IsVisible="{Binding ElementName=ckbVendorVisi,

Path=IsChecked,

FallbackValue=0}">

<telerik:GridViewDataColumn.CellTemplate>

<DataTemplate>

<DockPanel>

<Label Content="{Binding Path=LV_Name, FallbackValue=''}"

Visibility="{Binding Path=NotNewRecord,

FallbackValue=0,

Converter={StaticResource BoolVisiRevConv2}}"/>

<TextBox Text="{Binding Path=LV_Name, FallbackValue=''}"

Visibility="{Binding Path=NotNewRecord,

FallbackValue=0,

Converter={StaticResource BoolVisiConv2}}"/>

</DockPanel>

</DataTemplate>

</telerik:GridViewDataColumn.CellTemplate>

</telerik:GridViewDataColumn>

The above piece of code, using MVVM, produces a 'System.Windows.Data Information XX' errors - Three to be exact: 41, 20, 21 for each ViewModel property binding.

System.Windows.Data Information: 41 : BindingExpression path error: 'LV_Name' property not found for 'object' because data item is null.  This could happen because the data provider has not produced any data yet. BindingExpression:Path=LV_Name; DataItem=null; target element is 'Label' (Name=''); target property is 'Content' (type 'Object')

System.Windows.Data Information: 20 : BindingExpression cannot retrieve value due to missing information. BindingExpression:Path=LV_Name; DataItem=null; target element is 'Label' (Name=''); target property is 'Content' (type 'Object')

System.Windows.Data Information: 21 : BindingExpression cannot retrieve value from null data item. This could happen when binding is detached or when binding to a Nullable type that has no value. BindingExpression:Path=LV_Name; DataItem=null; target element is 'Label' (Name=''); target property is 'Content' (type 'Object')

System.Windows.Data Information: 41 : BindingExpression path error: 'NotNewRecord' property not found for 'object' because data item is null.  This could happen because the data provider has not produced any data yet. BindingExpression:Path=NotNewRecord; DataItem=null; target element is 'Label' (Name=''); target property is 'Visibility' (type 'Visibility')

System.Windows.Data Information: 20 : BindingExpression cannot retrieve value due to missing information. BindingExpression:Path=NotNewRecord; DataItem=null; target element is 'Label' (Name=''); target property is 'Visibility' (type 'Visibility')

System.Windows.Data Information: 21 : BindingExpression cannot retrieve value from null data item. This could happen when binding is detached or when binding to a Nullable type that has no value. BindingExpression:Path=NotNewRecord; DataItem=null; target element is 'Label' (Name=''); target property is 'Visibility' (type 'Visibility')

System.Windows.Data Information: 41 : BindingExpression path error: 'LV_Name' property not found for 'object' because data item is null.  This could happen because the data provider has not produced any data yet. BindingExpression:Path=LV_Name; DataItem=null; target element is 'TextBox' (Name=''); target property is 'Text' (type 'String')

System.Windows.Data Information: 20 : BindingExpression cannot retrieve value due to missing information. BindingExpression:Path=LV_Name; DataItem=null; target element is 'TextBox' (Name=''); target property is 'Text' (type 'String')

System.Windows.Data Information: 21 : BindingExpression cannot retrieve value from null data item. This could happen when binding is detached or when binding to a Nullable type that has no value. BindingExpression:Path=LV_Name; DataItem=null; target element is 'TextBox' (Name=''); target property is 'Text' (type 'String')

System.Windows.Data Information: 41 : BindingExpression path error: 'NotNewRecord' property not found for 'object' because data item is null.  This could happen because the data provider has not produced any data yet. BindingExpression:Path=NotNewRecord; DataItem=null; target element is 'TextBox' (Name=''); target property is 'Visibility' (type 'Visibility')

System.Windows.Data Information: 20 : BindingExpression cannot retrieve value due to missing information. BindingExpression:Path=NotNewRecord; DataItem=null; target element is 'TextBox' (Name=''); target property is 'Visibility' (type 'Visibility')

System.Windows.Data Information: 21 : BindingExpression cannot retrieve value from null data item. This could happen when binding is detached or when binding to a Nullable type that has no value. BindingExpression:Path=NotNewRecord; DataItem=null; target element is 'TextBox' (Name=''); target property is 'Visibility' (type 'Visibility')

If I swap the CellTemplate out and use the DataMemberBidning property on the GridViewDataColumn then no binding error(s) occur - BUT I require the dual content hide/show feature.

I have also attempted to use the other types of GridViewColumn available but that seemed to make little difference in the outcome.

Can you help me determin why my non-null ItemsSource and its non-null properties are not being friendly with your RadGridView's columns?

Cheers,

GridView

answered on 09 May 2012

5 answers

143 views

Move Current To an item which is not on page collection

Hi,
Another question,
we are working with wcf data services and the dataservicedatasource (the mvvm way - QueryableDataServiceCollectionView) with the datapager.
On certain scenarios, after adding a new item for example, we would like to set the current item in the datagrid to an item
which may or may not be on the presented page in the pager.
the MoveCurrentTo() method does not work if it is not on the collection of the page retrieved.

Is there an easy way to do so?
Thanks

DataServiceDataSource

answered on 09 May 2012

4 answers

122 views

Error translating the query

Hi
In our application which is based on wcf data services and Entity Framework, we are using the dataservicedatasource in the mvvm pattern(with the QueryableDataServiceCollectionView object) togeher with the RadDataFilter.
the filter works great in all scenarios but when trying to retrieve data based on the "equal filter" of the property which is the primary key of the table we get this exception:
"Error translating Linq expression to URI: Cannot specify query options (orderby, where, take, skip) on single resource" (which is also the query on the loadingeventargs of the LoadingData event of the QueryableDataServiceCollectionView).
i.e. only when fetching a single data.
the Query.expression which is generated is:
Convert([10000].Where(item => (item.Company_No == 54)).Take(14)).IncludeTotalCount()

Thanks

DataServiceDataSource

answered on 09 May 2012

1 answer

126 views

geoserver geowebcache source

hello,
i am trying to convert a silverlight DeepEarth project over a geoserver into a WPF control. i have some problem trying to understand how the new WmsTiled Source work ( for example what kind of uri should i put in the string parameter?). Furthermore i was able to connect to a GeoWebCache using this litlle class overriding microsoft MapControl TileSource :

public class GWCTileSource : Microsoft.Maps.MapControl.TileSource

{

private const string TilePath = @"{GWC_ADDRESS}/service/gmaps?layers={L}&zoom={Z}&x={X}&y={Y}";

private string gwc_address;

private string layername;

public GWCTileSource()

: base()

{

}

public GWCTileSource(string gwc_address, string layername)

: base()

{

this.gwc_address = gwc_address;

this.layername = layername;

}

public override Uri GetUri(int x, int y, int zoom)

{

string url = TilePath;

url = url.Replace("{GWC_ADDRESS}", gwc_address);

url = url.Replace("{L}", layername);

url = url.Replace("{Z}", zoom.ToString());

url = url.Replace("{X}", x.ToString());

url = url.Replace("{Y}", y.ToString());

return new Uri(url);

}

any advice on how should i proceed to manage both wms and wms through GeowebCache sources ?

Map

answered on 09 May 2012

1 answer

321 views

Change RadScheduleView background color cell based

We are currently developing a program using RadScheduleView. In our model any appointment can only be scheduled during user's working hours (which is user configurable).

Working hours can change from one day to another, and can be changed during program execution. We want it to be displayed behind other appointments (that is, in the background of RadScheduleView).

Is there an way to configure RadSchedule view background color in a cell independent way? i.e Working hours being displayed as green colored background cells while non working hours being displayed as gray colored cells, for example?

Thank you in advance,

Leandro

ScheduleView

answered on 09 May 2012

3 answers

380 views

RibbonView and MVVM

Hi All,

I have a few classes that define the datacontext for controls in the RibbonView:

public class RibbonElement

{

public string Text { get; set; }

public bool IsEnabled { get; set; }

}

public class Tab : RibbonElement

{

public ObservableCollection<Group> Groups { get; set; }

}

public class Group : RibbonElement

{

public ObservableCollection<Button> Buttons { get; set; }

}

public class Button : RibbonElement

{

}

And I have several HierarchicalDataTemplates that define how the classes are visualized (modeled after the samples on this site):

<DataTemplate x:Key="ButtonTemplate">

<t:RadRibbonButton Text='{Binding Text}' IsEnabled='{Binding IsEnabled}' />

</DataTemplate>

<HierarchicalDataTemplate x:Key="GroupTemplate"

ItemsSource='{Binding Buttons}'

ItemTemplate='{StaticResource ButtonTemplate}'>

<TextBlock Text='{Binding Text}' />

</HierarchicalDataTemplate>

<HierarchicalDataTemplate x:Key="TabTemplate"

ItemsSource='{Binding Groups}'

ItemTemplate='{StaticResource GroupTemplate}'>

<TextBlock Text='{Binding Text}' />

</HierarchicalDataTemplate>

</Window.Resources>

<t:RadRibbonView ItemsSource='{Binding Tabs}'

ItemTemplate='{StaticResource TabTemplate}'

ApplicationButtonVisibility="Hidden" />

How can I create the RadRibbonGroup/RadRibbonTab controls in the templates, instead of using a TextBlock? I need to do this so that I can bind to IsEnabled to dynamically enable/disable groups. The RadRibbonTab seems to take the output of the template and put it in the group header instead of the actual RadRibbonGroup control. By contrast, the headered controls in the rest of WPF have HeaderTemplate property for headers and ItemTemplate property for items.

RibbonView and RibbonWindow

answered on 08 May 2012

5 answers

158 views

Can the RichTextBox be used on the server?

My company is currently looking at the possibility of combining the use of the Silverlight and the WPF RichTextBoxes (RTB).

On the client side we would have the Silverlight RTB. It would send its XAML to the server to be saved into the database.

Then from a service the XAML would be loaded into a in-memory WPF RTB and then an image of the content would be generated.

My Question is, can the WPF RTB be used in a service that does not have an interface? And if it can, Will I be able to create a RenderTargetBitmap of its visual?

RichTextBox

answered on 08 May 2012

2 answers

113 views

How can i reach a 3D-Chart with serien on z-axis

Hi all,

how can i reach a 3D-Chart like the attached one. Thank You!

Chart

answered on 08 May 2012

2 answers

104 views

How to make a 3d horizontal Bar Chart

I can't find how to make a 3D horizontal bar chart. Is there a series definition to do this? Or does anyone have instructions on how to make a Custom 3D model that can do this?

I'm using the document at

http://www.telerik.com/help/wpf/radchart-getting-started-create-data-bound-chart.html

to build a test application. I'm also using the code behind, so a piece of my code is:

{
[...]
SeriesMapping seriesMapping = new SeriesMapping();
seriesMapping.LegendLabel = "Product Sales";
Bar3DSeriesDefinition def = new Bar3DSeriesDefinition();
seriesMapping.SeriesDefinition = new Bar3DSeriesDefinition();//new HorizontalBarSeriesDefinition();//new SplineSeriesDefinition();
seriesMapping.ItemMappings.Add(new ItemMapping("Month", DataPointMember.XValue));
seriesMapping.ItemMappings.Add(new ItemMapping("Quantity", DataPointMember.YValue));
seriesMapping.ItemMappings.Add(new ItemMapping("MonthName", DataPointMember.XCategory));
radChart1.SeriesMappings.Add(seriesMapping);
radChart1.ItemsSource = this.CreateData();
}

public class ProductSales
{
public ProductSales(int quantity, int month, string monthName)
{
  this.Quantity = quantity;
  this.Month = month;
  this.MonthName = monthName;
}
public int Quantity
{
  get;
  set;
}
public int Month
{
  get;
  set;
}
public string MonthName
{
  get;
  set;
}
}

private List<ProductSales> CreateData()
{
List<ProductSales> persons = new List<ProductSales>();
persons.Add(new ProductSales(154, 1, "January"));
persons.Add(new ProductSales(138, 2, "February"));
persons.Add(new ProductSales(143, 3, "March"));
persons.Add(new ProductSales(120, 4, "April"));
persons.Add(new ProductSales(135, 5, "May"));
persons.Add(new ProductSales(125, 6, "June"));
persons.Add(new ProductSales(179, 7, "July"));
persons.Add(new ProductSales(170, 8, "August"));
persons.Add(new ProductSales(198, 9, "September"));
persons.Add(new ProductSales(187, 10, "October"));
persons.Add(new ProductSales(193, 11, "November"));
persons.Add(new ProductSales(212, 12, "December"));
return persons;
}

thanks in advance

Chart

answered on 08 May 2012