Questions on UI for WPF Forum

5 answers

181 views

I'm using a RadWindow but when I do ShowDialog no background is displayed. What do I need to do to make the ModalBackground show? Does't work for ShowDialog or Alert.

Window

answered on 02 Mar 2011

2 answers

137 views

OnItemDataBound equivalent event in RadGridView control

Hi,

I wanted to implement the OnItemDataBound event feature in RadGridView control.

Please, let me know if there is any solution to this issue.

Regards,
Hirak

GridView

answered on 02 Mar 2011

1 answer

194 views

WPF Gridview MUCH slower than WinForms when using child table

Hello,

Our application uses gridviews to display hierarchical data using two separate data tables that share a key for lookup purposes.

The application previously used WinControls RadGridView and joined the two tables using a GridViewRelation.

                this.Grid.BeginUpdate();
                this.Grid.MasterTemplate.Reset();
                Grid.DataSource = datatables[0];
                if (AddDetails)
                {
                    GridViewTemplate template = new GridViewTemplate();
                    template.DataSource = datatables[1];
                    Grid.Templates.Add(template);
 
                    GridViewRelation relation = new GridViewRelation(Grid.MasterTemplate);
                    relation.ChildTemplate = template;
                    relation.RelationName = "Details";
                    relation.ParentColumnNames.Add(PC);
                    relation.ChildColumnNames.Add(CC);
                    Grid.Relations.Add(relation);
                 }

 





Once loaded, the lookup was very fast, i.e. I could expand any row to view the child data more or less 
instantly.

 
However when I switched over to the WPF gridview, performance for the same input became 
unacceptably slow, for example it takes 
approximately 2 seconds every time to expand a row to view the child data.

The WPF xaml looks like so:
   <Grid>
        <telerik:RadGridView x:Name="BugGrid"
                             IsFilteringAllowed="True"
                             IsReadOnly="True"
                             CanUserInsertRows="False"
                             TabIndex="1"
                             AutoGenerateColumns="False"
                             DataLoading="DataLoading"
                             RowHeight="32"
                             MaxColumnWidth="200"
                             EnableRowVirtualization="True"
                             EnableColumnVirtualization="True"
                             DataLoadMode="Asynchronous"
                            
                             >
                             
            <telerik:RadGridView.Columns>
                <telerik:GridViewDataColumn DataMemberBinding="{Binding asdfas}"/>
                <telerik:GridViewDataColumn DataMemberBinding="{Binding Blah}"/>
                <telerik:GridViewDataColumn DataMemberBinding="{Binding PC}" IsVisible="False"/>
            </telerik:RadGridView.Columns>
            
            <telerik:RadGridView.ChildTableDefinitions>
                <telerik:GridViewTableDefinition x:Name="Details">
                    <telerik:GridViewTableDefinition.Relation>
                        <telerik:TableRelation>
                            <telerik:TableRelation.FieldNames>
                                <telerik:FieldDescriptorNamePair 
                                    ParentFieldDescriptorName="PC" 
                                    ChildFieldDescriptorName="CC"/>
                            </telerik:TableRelation.FieldNames>
                        </telerik:TableRelation>
                    </telerik:GridViewTableDefinition.Relation>
                </telerik:GridViewTableDefinition>
            </telerik:RadGridView.ChildTableDefinitions>
        </telerik:RadGridView>
    </Grid>


In the code behind I define the properties of the child table in DataLoading

        private void DataLoading(object sender, GridViewDataLoadingEventArgs e)
        {       
            GridViewDataControl dataControl = (GridViewDataControl) sender;
            if (dataControl.ParentRow != null)
            {
                dataControl.AutoGenerateColumns = false;
                dataControl.ShowGroupPanel = false;
                dataControl.IsFilteringAllowed = false;
                dataControl.CanUserFreezeColumns = false;
                dataControl.IsReadOnly = true;
                GridViewDataColumn column = new GridViewDataColumn();
                column.DataMemberBinding = new Binding("CC");
                column.IsVisible = false;
                column = new GridViewDataColumn();
                column.DataMemberBinding = new Binding("Name");
                dataControl.Columns.Add(column);
                column = new GridViewDataColumn();
                column.DataMemberBinding = new Binding("Value");
                dataControl.Columns.Add(column);
            }




I set the data source of the child table definition to the be the data table with the details.



I've been able to determine that it's the looking up of the appropriate child data from 

the data table that is the very slow part (e.g. if the details data table is blank, 

the rows expand instantly) but why is it SO much slower than 
the old WinControls grid, which also worked with the same data using a similar Relationship.



More importantly, how can I speed it up?

GridView

answered on 02 Mar 2011

1 answer

119 views

Which version to install?

There are separate WPF 3.5 & 4.0 installers, but I can't seem to install both at the same time.

General Discussions

answered on 02 Mar 2011

3 answers

1.3K+ views

RadRadioButton with traditional radio button look

The visual for the RadRadioButton shows up as a toggle button with the toggle state based on whether it is checked. Is it possible to show the radio button as a traditional radio button instead? I'd like to do this because the traditional button conveys that the selection is exclusive whereas the current visual does not.

Buttons

answered on 01 Mar 2011

4 answers

226 views

Cascading GridViewComboBoxColumns

I have 2 GridViewComboBoxColumns in my GridView.
The second GridViewComboBoxColumn's ItemsSource is a property of the selected item in the first GridViewComboBoxColumn.

How do I accomplish this in XAML?

Thanks!

GridView

answered on 01 Mar 2011

6 answers

199 views

CollapseAllHierarchyItems not working

So I have a RadGridView, with 10 items in it... CollapseAllHierarchyItems only seems to collapse half of them. I tried running a loop and invoking CollapseHierarchyItem on each member of Items, and that only does about half of them as well.

If I run this loop twice, going back to the main thread in between, it works. Any ideas?

GridView

answered on 01 Mar 2011

1 answer

69 views

Selecting row in grid

How can I select row after clicing on control that is placed in it?

GridView

answered on 01 Mar 2011

2 answers

159 views

Binding RadTreeListView to ModelItem

Hi there,

We want to use RadTreeListView to bind into Workflow Foundation's ModelItem.
The example shown in this sample code is using TreeView to display WF ModelItem. But in our requirement, we need additional columns to display information in the node. That's why we plan to use RadTreeListView. However, we haven't been able to bind it properly to ModelItem.

So, do you have any idea how to bind ModelItem to RadTreeListView?
Here is the simplified structure of ModelItem that we want to bind

ModelItem has collection of ModelProperty
The Value property of ModelProperty object is another ModelItem
So, we want to bind to ModelItem (let's say MI), and then MI's children will be collection of ModelProperty.Value (which is also a type of ModelItem)

Thanks and best regards,

Arinto

TreeListView