Sorting
In this article we will show how you can sort your data based on the header names or the totals.
Understanding Sorting Mechanism
RadPivotGrid provides different sorting capabilities. You can sort your RowGroupDescriptions and ColumnGroupDescriptions ascending (from A to Z) and descending (from Z to A) based on the names of the properties they are showing or based on the aggregated description.
With the Q1 2014 SP1 version of Telerik UI for RadPivotGrid provides an additional option. The data can be shown the way it has been received from the data source using the SortOrder property set to None.
We will explain this with a simple RadPivotGrid:
The ColumnGroupDescription in this RadPivotGrid is the Name of the Product. By default the sorting of the columns is ascending (from A to Z) based on the headers: Notebook, Pen, Pencil. You can easily change the sorting of the Name ColumnGroupDescription and set it to descending (from Z to A). This will lead to the following result:
The columns are reordered based on their names (check the green rectangle on the top of the image). You can apply sorting based on some of the PropertyAggregateDescription you are using. In the example above you can apply sorting of the Name ColumnGroupDescription in ascending (from A to Z) or descending (from Z to A) format based on the Total Average of Price (red rectangle) or Total Sum of Quantity (blue rectangle). Here is the new view of RadPivotGrid when the Name ColumnGroupDescription is sorted in descending format based on the Total Sum of Quantity:
The sorting is set on the ColumnGroupDescriptions or RowGroupDescriptions. You cannot set sorting on the AggregateDescriptions, but you can sort the columns or rows based on the aggregated values.
Sort the data
The sorting can be applied in the XAML, in the code behind or even at runtime with the help of RadPivotFieldList.
- Sorting based on the GroupName (header) can be Ascending (from A to Z) or Descending (from Z to A). The default value is Ascending, but you can change it by using SortOrder property:
<pivot:PropertyGroupDescription PropertyName="Name" SortOrder="Descending"/>
<pivot:DoubleGroupDescription PropertyName="Price" SortOrder="Ascending"/>
<pivot:DateTimeGroupDescription PropertyName="Date" SortOrder="Descending"/>
Telerik.Pivot.Core.PropertyGroupDescription propGroupDescription = new Telerik.Pivot.Core.PropertyGroupDescription();
propGroupDescription.PropertyName = "Name";
propGroupDescription.SortOrder = SortOrder.Descending;
DoubleGroupDescription doubleGroupDescription = new DoubleGroupDescription();
doubleGroupDescription.PropertyName = "Price";
doubleGroupDescription.SortOrder = SortOrder.Ascending;
DateTimeGroupDescription dateTimeGroupDescription = new DateTimeGroupDescription();
dateTimeGroupDescription.PropertyName = "Date";
dateTimeGroupDescription.SortOrder = SortOrder.Descending;
Dim propGroupDescription As New Telerik.Pivot.Core.PropertyGroupDescription()
propGroupDescription.PropertyName = "Name"
propGroupDescription.SortOrder = SortOrder.Descending
Dim doubleGroupDescription As New DoubleGroupDescription()
doubleGroupDescription.PropertyName = "Price"
doubleGroupDescription.SortOrder = SortOrder.Ascending
Dim dateTimeGroupDescription As New DateTimeGroupDescription()
dateTimeGroupDescription.PropertyName = "Date"
dateTimeGroupDescription.SortOrder = SortOrder.Descending
- If you need to avoid the data to be sorted anyhow, you can set the SortOrder property to None. This way the data will appear the way it is was received from the data source:
<pivot:PropertyGroupDescription PropertyName="Name" SortOrder="None"/>
<pivot:DoubleGroupDescription PropertyName="Price" SortOrder="None"/>
<pivot:DateTimeGroupDescription PropertyName="Date" SortOrder="None"/>
Telerik.Pivot.Core.PropertyGroupDescription propGroupDescription = new Telerik.Pivot.Core.PropertyGroupDescription();
propGroupDescription.PropertyName = "Name";
propGroupDescription.SortOrder = SortOrder.None;
DoubleGroupDescription doubleGroupDescription = new DoubleGroupDescription();
doubleGroupDescription.PropertyName = "Price";
doubleGroupDescription.SortOrder = SortOrder.None;
DateTimeGroupDescription dateTimeGroupDescription = new DateTimeGroupDescription();
dateTimeGroupDescription.PropertyName = "Date";
dateTimeGroupDescription.SortOrder = SortOrder.None;
Dim propGroupDescription As New Telerik.Pivot.Core.PropertyGroupDescription()
propGroupDescription.PropertyName = "Name"
propGroupDescription.SortOrder = SortOrder.None
Dim doubleGroupDescription As New DoubleGroupDescription()
doubleGroupDescription.PropertyName = "Price"
doubleGroupDescription.SortOrder = SortOrder.None
Dim dateTimeGroupDescription As New DateTimeGroupDescription()
dateTimeGroupDescription.PropertyName = "Date"
dateTimeGroupDescription.SortOrder = SortOrder.None
Note that the SortOrder None property is available with the Q1 2014 SP1 version of Telerik UI for Silverlight.
- Sorting based on the GrandTotals can be Ascending or Descending. To set such sort mechanism you have to use the SortOrder and GroupComparer properties:
<pivot:PropertyGroupDescription PropertyName="Name" SortOrder="Ascending">
<pivot:PropertyGroupDescription.GroupComparer>
<pivot:GrandTotalComparer AggregateIndex="0"/>
</pivot:PropertyGroupDescription.GroupComparer>
</pivot:PropertyGroupDescription>
<pivot:DoubleGroupDescription PropertyName="Price" SortOrder="Descending">
<pivot:DoubleGroupDescription.GroupComparer>
<pivot:GrandTotalComparer AggregateIndex="1"/>
</pivot:DoubleGroupDescription.GroupComparer>
</pivot:DoubleGroupDescription>
<pivot:DateTimeGroupDescription PropertyName="Date" SortOrder="Descending">
<pivot:DateTimeGroupDescription.GroupComparer>
<pivot:GrandTotalComparer AggregateIndex="0"/>
</pivot:DateTimeGroupDescription.GroupComparer>
</pivot:DateTimeGroupDescription>
Telerik.Pivot.Core.PropertyGroupDescription propGroupDescription = new Telerik.Pivot.Core.PropertyGroupDescription();
propGroupDescription.PropertyName = "Name";
propGroupDescription.SortOrder = SortOrder.Descending;
propGroupDescription.GroupComparer = new GrandTotalComparer() { AggregateIndex = 0 };
DoubleGroupDescription doubleGroupDescription = new DoubleGroupDescription();
doubleGroupDescription.PropertyName = "Price";
doubleGroupDescription.SortOrder = SortOrder.Ascending;
doubleGroupDescription.GroupComparer = new GrandTotalComparer() { AggregateIndex = 1 };
DateTimeGroupDescription dateTimeGroupDescription = new DateTimeGroupDescription();
dateTimeGroupDescription.PropertyName = "Date";
dateTimeGroupDescription.SortOrder = SortOrder.Descending;
dateTimeGroupDescription.GroupComparer = new GrandTotalComparer() { AggregateIndex = 0 };
Dim propGroupDescription As New Telerik.Pivot.Core.PropertyGroupDescription()
propGroupDescription.PropertyName = "Name"
propGroupDescription.SortOrder = SortOrder.Descending
propGroupDescription.GroupComparer = New GrandTotalComparer() With {.AggregateIndex = 0}
Dim doubleGroupDescription As New DoubleGroupDescription()
doubleGroupDescription.PropertyName = "Price"
doubleGroupDescription.SortOrder = SortOrder.Ascending
doubleGroupDescription.GroupComparer = New GrandTotalComparer() With {.AggregateIndex = 1}
Dim dateTimeGroupDescription As New DateTimeGroupDescription()
dateTimeGroupDescription.PropertyName = "Date"
dateTimeGroupDescription.SortOrder = SortOrder.Descending
dateTimeGroupDescription.GroupComparer = New GrandTotalComparer() With {.AggregateIndex = 0}
The AggregateIndex property is set based on the count of your aggregate descriptions. If you have two aggregates the first one will have AggregateIndex = 0 and the second - AggregateIndex = 1.
Changing the Sorting at runtime
RadPivotFieldList gives you the ability to change the sorting of a description at runtime. When you click on RowGroupDescription or ColumnGroupDescription a new popup opens with several sorting options. If you want to save the current sorting, but only change its order (for example the above RadPivotGrid is sorted based on the Total Sum of Quantity in Descending order, and you want to change it to Ascending) you can use the first two options which are doing exactly this - just changing the SortOrder:
If you want to change the property based on which the sort is applied, then you can use the third option - More Sorting Options. A new RadWindow will be opened in which you can choose Ascending or Descending order of the sort. When you click the dropdown button you'll see a full list of the possible sorting basis:
