How to add row in MVVM pattern? - xaml

Question

Say I use xaml to create a telerik RadGridView.
<telerik:RadGridView x:Name="myRadGridView"
Width="1000"
IsReadOnly="True"
ValidatesOnDataErrors="None"
AutoGenerateColumns="False"
IsFilteringAllowed="False"
ShowGroupPanel="False"
ShowColumnFooters="False"
CanUserResizeColumns="False"
CanUserFreezeColumns="False"
SelectionMode="Single"
CanUserReorderColumns="False"
CanUserSortColumns="False"
CanUserInsertRows="False"
CanUserDeleteRows="False"
CanUserSelect="True"
RowIndicatorVisibility="Visible"
Height="250"
ScrollViewer.VerticalScrollBarVisibility="Visible"
ItemsSource="{Binding Information}"
SelectedItem="{Binding SelectedItem, Mode=TwoWay}"
SelectionChanged="myRadGridView_SelectionChanged"
>
<telerik:RadGridView.Columns>
<telerik:GridViewColumn />
<telerik:GridViewColumn />
.....
</telerik:RadGridView.Columns>
There are many columns.
I get the data from my ViewModel. Now I want to add a new row to get the total value of the above rows.
My question is that how to add the row in my ViewModel?

Answer 1

Try this:
With this you can do it for specific columns via XAML (no need other code)
<telerik:GridViewDataColumn Header="Quantity"
DataMemberBinding="{Binding ProdQuantity}"
UniqueName="Quantity">
<telerik:GridViewDataColumn.AggregateFunctions>
<telerik:SumFunction Caption="Sum: " />
</telerik:GridViewDataColumn.AggregateFunctions>
</telerik:GridViewDataColumn>
OR For all numeric columns
<telerik:RadGridView x:Name="myRadGridView"
Width="1000"
IsReadOnly="True"
...
ShowColumnFooters="True"
AutoGeneratingColumn="GridView_AutoGeneratingColumn"
ItemsSource="{Binding Information}"
SelectedItem="{Binding SelectedItem, Mode=TwoWay}"
SelectionChanged="myRadGridView_SelectionChanged"
>
In code:
private void GridView_AutoGeneratingColumn(object sender, GridViewAutoGeneratingColumnEventArgs e)
{
if(!e.Column is GridViewDataColumn)
return;
GridViewDataColumn col = (e.Column as GridViewDataColumn);
if (col.DataType != null)
{
if (col.DataType == typeof(Int32) || col.DataType == typeof(long) || col.DataType == typeof(Double))
e.Column.AggregateFunctions.Add(new SumFunction());
}
}
note that columns must be GridViewDataColumn