Questions on UI for WPF Forum

1 answer

156 views

Adding Lists of lists of lists, etc. as itemsource on radtreeView

I am trying to add a list of lists of lists to a radtreeView but the child elements never appear, I have used a HeirichalDataTemplate as a test for the first 2 elements, is there something I am missing , given the following xalm

<pre>

<telerik:RadTabItem Header="Lookup Sets">
<telerik:RadTreeView IsLoadOnDemandEnabled="True" ItemsSource="{Binding AttributeLookupSetConversions}">
<telerik:RadTreeView.Resources>
<HierarchicalDataTemplate DataType="{x:Type cm:AttributeLookupSetConversion}">
<CheckBox Content="{Binding Path=Name}" IsChecked="{Binding Path=IsSelected, Mode=TwoWay}" Checked="CheckBox_Checked" Unchecked="CheckBox_Unchecked" Command="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type telerikDocking:RadSplitContainer}}, Path=DataContext.UpdateSelectionCommand}"/>
</HierarchicalDataTemplate>
<HierarchicalDataTemplate DataType="{x:Type cm:AttributeConversion}">
<CheckBox Content="{Binding Path=Name}" IsChecked="{Binding Path=IsSelected, Mode=TwoWay}" Checked="CheckBox_Checked" Unchecked="CheckBox_Unchecked" Command="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type telerikDocking:RadSplitContainer}}, Path=DataContext.UpdateSelectionCommand}"/>
</HierarchicalDataTemplate>
</telerik:RadTreeView.Resources>
</telerik:RadTreeView>
</telerik:RadTabItem>

</pre>

I cant seem to get the UI to show its child elements

General Discussions

answered on 08 Mar 2017

1 answer

158 views

MDX Query Generation

Hi,

Is it possible to change the way that MDX is generated by the PivotGrid when filters are applied?

Currently when I apply a Month filter in my time dimension for e.g., this is done by adding the filter value as a sub-cube query in the from clause, rather than placing it in the WHERE clause.

So instead of having

SELECT x ON 0, y ON 1

FROM <cube>

WHERE ([time].[month].&[z])

The pivot grid generates

SELECT x ON 0, y ON 1
FROM (SELECT [time].[month].&[z] FROM <cube>)

This is generally fine, but when we have calculated measures in the cube which rely on knowing where you are in the time hierarchy, (i.e. [time].[month].currentmember) then this distorts the calculation because the scope is handled in the sub-cube and the main query believes that [time].[month].currentmember is 'All' rather than Month Z as the query above suggests.

Is there a way to tell the grid to use the former method? Failing that, how can we access the time filter from the calculations?

PivotGrid

answered on 08 Mar 2017

2 answers

195 views

[Solved] MapMouseLocationIndicator LocationFormat

I want to change to format of the map mouse location indicator to decimal degrees.

In the help it shows how to do this if the indicator is OUTSIDE the map control (http://www.telerik.com/help/wpf/radmap-features-mouse-location.html).

I want to do this with the built-in indicator. How can I do this please?

Map

answered on 08 Mar 2017

8 answers

646 views

RadTreeView generates an error: "object reference not set to an instance of an object" in XAML.

I try to use RadTreeView in my WPF MVVM Prism 6 application project. But when I put RadTreeView in UserControl area then it is underlined with blue wavy line and if I move the mouse cursor to this line the next error message is displayed: "Object reference not set to an instance of an object". I've added references to the following assemblies: Telerik.Windows.Controls, Telerik.Windows.Controls.Navigation, Telerik.Windows.Controls.Data. But I have the abovementioned error. What the reason of it. Please help me eliminate this error situation.

TreeView

answered on 08 Mar 2017

1 answer

112 views

RadTreeView binding

Is it possible to Bind a command while drag and drop? Instead of using code behind?

TreeView

answered on 08 Mar 2017

13 answers

495 views

Show a dynamic mask when viewing (not just editing) grid cells

I have a GridViewDataColumn in which I need the cells to use/display a mask both in view/edit mode. In order to do this I have set the CellTemplate and the CellEditTemplate as you can see below. I cannot use the GridViewMaskedInputColumn because it does not allow me to specify different masks per cell. One mask per column will not work in my scenario (see attached picture).

There is a slight difference between view and edit mode that I would like help with. In edit mode, the RadMaskedTextBox fills the cell, but in view mode, the RadMaskedTextBox does not quite fill the cell. I would like masked textbox to fill the cell regardless of whether it is in edit or view mode.

I have considered putting a Margin="3,0,0,0" on the CellEditTemplate, this means the textbox will not fill the cell in either view/edit mode - not idea....

<telerik:GridViewDataColumn

Header="Value"

ValidatesOnDataErrors="InEditMode"

DataMemberBinding="{Binding Value}"

Width="*">

<telerik:GridViewDataColumn.CellTemplate>

<DataTemplate>

<telerik:RadMaskedTextInput

Mask="{Binding ValueMask}"

Value="{Binding Value}"

TextMode="MaskedText"

IsEnabled="False"

SelectionOnFocus="CaretToBeginning"

IsLastPositionEditable="False"

HorizontalAlignment="Stretch"

VerticalAlignment="Stretch"/>

</DataTemplate>

</telerik:GridViewDataColumn.CellTemplate>

<telerik:GridViewDataColumn.CellEditTemplate>

<DataTemplate>

<telerik:RadMaskedTextInput

Mask="{Binding ValueMask}"

Value="{Binding Value}"

TextMode="MaskedText"

SelectionOnFocus="CaretToBeginning"

IsLastPositionEditable="False"

HorizontalAlignment="Stretch"

VerticalAlignment="Stretch"/>

</DataTemplate>

</telerik:GridViewDataColumn.CellEditTemplate>

</telerik:GridViewDataColumn>

GridView

answered on 07 Mar 2017

1 answer

174 views

Custom aggregate for QueryableDataProvider

Hi!

There is any way to create custom aggregate for QueryableDataProvider?

I want to create CustomDistinct aggregate, I did it successfully for LocalDataSourceProvider, and I need it also for QueryableDataProvider.

Here is my code, unfortunately, it is not working at all..

Hi!
There is any way to create custom aggregate for QueryableDataProvider?
I want to create CustomDistinct aggregate, I did it successfully for LocalDataSourceProvider, and I neet also for QueryableDataProvider.
Here is my code, unfurtonately, it is not working at all..

I see "CountDistinct" in "More aggregate options" window, but when i choose it, the pivot got an error.

using System;

using System.Collections.Generic;

using System.Linq;

using System.Linq.Expressions;

using Telerik.Pivot.Core;

using Telerik.Pivot.Core.Fields;

using Telerik.Pivot.Queryable;

namespace YA.Pivot.Queryable

{

public class MyQueryableDataProvider : QueryableDataProvider

{

protected override void OnPrepareDescriptionForField(PrepareDescriptionForFieldEventArgs args)

{

base.OnPrepareDescriptionForField(args);

if (args.DescriptionType == DataProviderDescriptionType.Aggregate)

{

var old = args.Description as QueryablePropertyAggregateDescriptionBase;

args.Description = new CustomPropertyAggregateDescription()

{

PropertyName = old.PropertyName,

FunctionName = old.FunctionName,

AggregateFunction = old.AggregateFunction,

CustomName = old.CustomName,

StringFormat = old.StringFormat

};

}

internal class CustomPropertyAggregateDescription : QueryablePropertyAggregateDescriptionBase

{

private enum MyAggregateFunctions

{

CountDistinct = -100

}

protected override Cloneable CreateInstanceCore()

{

return new CustomPropertyAggregateDescription()

{

AggregateFunction = this.AggregateFunction,

CustomName = this.CustomName,

FunctionName = this.FunctionName,

PropertyName = this.PropertyName,

StringFormat = this.StringFormat,

StringFormatSelector = this.StringFormatSelector,

TotalFormat = this.TotalFormat

};

}

private bool IsCountDistinct => (int)base.AggregateFunction == (int)MyAggregateFunctions.CountDistinct;

protected override Expression CreateAggregateExpression(Expression enumerableExpression, string aggregatedValueName)

{

if (enumerableExpression == null)

{

throw new ArgumentNullException(nameof(enumerableExpression));

}

if (IsCountDistinct)

{

return CreateCountDistinctExpression(enumerableExpression, aggregatedValueName);

}

return base.CreateAggregateExpression(enumerableExpression, aggregatedValueName);

}

private Expression CreateCountDistinctExpression(Expression enumerableExpression, string aggregatedValueName)

{

Type itemType = TypeExtensions.ExtractItemTypeFromEnumerableType(enumerableExpression.Type);

var selectParamExp = Expression.Parameter(itemType, "e");

var selectPropAccessExp = Expression.Property(selectParamExp, aggregatedValueName);

LambdaExpression selectLambdaExpression = Expression.Lambda(selectPropAccessExp, selectParamExp);

var select = Expression.Call(

typeof(Enumerable),

"Select",

new[] { itemType, selectLambdaExpression.Body.Type },

enumerableExpression,

selectLambdaExpression);

var distinct = Expression.Call(

typeof(Enumerable),

"Distinct",

new[] { selectLambdaExpression.Body.Type },

select);

var count = Expression.Call(

typeof(Enumerable),

"Count",

new[] { selectLambdaExpression.Body.Type },

distinct);

return count;

}

protected override IEnumerable<object> SupportedAggregateFunctions =>

base.SupportedAggregateFunctions.Concat(new object[] { MyAggregateFunctions.CountDistinct });

}

internal static class TypeExtensions

{

public static Type ExtractItemTypeFromEnumerableType(Type type)

{

var enumerableType = type.FindGenericType(typeof(IEnumerable<>));

if (enumerableType == null)

{

throw new ArgumentException("Provided type is not IEnumerable<>", nameof(type));

}

return enumerableType.GetGenericArguments().First();

}

private static Type FindGenericType(this Type type, Type genericType)

{

while (type != null && type != typeof(object))

{

if (type.IsGenericType && type.GetGenericTypeDefinition() == genericType)

{

return type;

}

if (genericType.IsInterface)

{

foreach (Type intfType in type.GetInterfaces())

{

Type found = intfType.FindGenericType(genericType);

if (found != null)

{

return found;

}

type = type.BaseType;

}

return null;

}

PivotGrid

answered on 07 Mar 2017

3 answers

262 views

ColumnFilterDescriptor not working on RadGridView

I have used RadGridView with data collection binded to it.

When I try to search for value in selected column with Filter pop up, on selected column,

I am able to filter collection with checkbox selection.

But when I enter value in the pop textbox and press filter button.

It is not filtering the collection.

I have checked both Distinct and filed filter properties of ColumnFilterDescriptor .It seems to look correct .

Can anybody please help me out to solve the problem?

GridView

answered on 06 Mar 2017

8 answers

1.7K+ views

override textbox style

Hello Telerik,

I wanted to do something similar as this:

<telerik:RadWatermarkTextBox WatermarkContent="{Resx WatermarkTextBox_AddNew }"

Visibility="{Binding IsNew, Converter={StaticResource VisibilityConverter}}">

<telerik:RadWatermarkTextBox.WatermarkTemplate>

<DataTemplate>

<TextBlock Style="{StaticResource TextBlockValueDefaultStyle}" Text="{Binding}" />

</DataTemplate>

</telerik:RadWatermarkTextBox.WatermarkTemplate>

</telerik:RadWatermarkTextBox>

but for the TextBox part of the control

is there an easy way to do so?

Thank you

WatermarkTextBox

answered on 06 Mar 2017

10 answers

212 views

RadWindow System.ArgumentOutOfRangeException

when using radwindow.alert, there is a small probability case to throw an System.ArgumentOutOfRangeException,

is any solution to avoid this ?

General Discussions

answered on 06 Mar 2017