SearchStateManager property is null when trying to change any of the properties of the SearchStateManager object in the Loaded event. This behavior is observed when the ShowSearchPanel property is not set to true initially.
While resizing the demos window, radgridview's horizontal scrollbar might flicker when demos viewport size is close to the gridview size.
Hi Telerik,
I have created a sample project for an issue I have found:
Please see the code behind of the sample.
When removing a column from a grid where the display index was changed, and rows are selected, I do get an ArgumentOutOfRangeException.
Any help is appreciated!
Thank you!
Thomas
To work this around, cancel the reordering in the ColumnReordering event if the drop target column cannot be reordered.
private void RadGridView_ColumnReordering(object sender, Telerik.Windows.Controls.ColumnReorderingEventArgs e)
{
int notResizeableColumnIndex = 1;
if (e.NewDisplayIndex == notResizeableColumnIndex)
{
e.Cancel = true;
}
}
Currently, when you click F2 or double mouse click in order to start editing a cell (with a TextBox editor) its text gets selected. This happens because the SelectAll() method of the underlying TextBox is called. Add a property that allows to disable this behavior and to avoid selecting the text.
At this point you can get this effect by creating a custom column and overriding its PrepareCellForEdit() method as shown here: https://docs.telerik.com/devtools/wpf/knowledge-base/kb-gridview-prevent-f2-text-selection
Add a property that allows you to move the position of the Control Panel button from the group panel's Grid row to the search panel's row. This way you can make the GridView more compact by placing the button in the search panel's area.
The GridView allows you to drag-to-reorder its columns. When start dragging the clicked element is accessed and a screenshot is made from it. Then the drag visual shows an image of the dragged column header. In some cases the drag visual gets clipped.
To work this around, you can subscribe the GridViewHeaderCell elements to the DragDropManager's DragInitialize event and replace the default drag visual with a custom one.
private void RadGridView_CellLoaded(object sender, Telerik.Windows.Controls.GridView.CellEventArgs e)
{
if (e.Cell is GridViewHeaderCell)
{
Dispatcher.BeginInvoke(new Action(() =>
{
DragDropManager.AddDragInitializeHandler(e.Cell, OnHeaderCellDragInitialize, true);
}));
}
}
private void RadGridView_CellUnloaded(object sender, Telerik.Windows.Controls.GridView.CellEventArgs e)
{
if (e.Cell is GridViewHeaderCell)
{
Dispatcher.BeginInvoke(new Action(() =>
{
DragDropManager.RemoveDragInitializeHandler(e.Cell, OnHeaderCellDragInitialize);
}));
}
}
private void OnHeaderCellDragInitialize(object sender, DragInitializeEventArgs e)
{
var dragSource = e.OriginalSource as GridViewHeaderCell;
if (dragSource != null)
{
var dragVisual = new Border()
{
BorderBrush = Brushes.LightGray,
BorderThickness = new Thickness(1),
Background = new SolidColorBrush(Colors.Bisque) { Opacity = 0.4 },
Width = dragSource.ActualWidth,
Height = dragSource.ActualHeight,
Child = new TextBlock()
{
Text = (string)dragSource.Column.Header,
Margin = new Thickness(5, 0, 5, 0),
VerticalAlignment = VerticalAlignment.Center }
};
e.DragVisual = dragVisual;
}
}
The property changed of the property bound to IsExpandableBinding (property of RadGridView) is not reflected in the row. To reproduce this the IsPropertyChangedAggregationEnabled property of RadGridView should be set to True (which is the default value) and the view model property (bound to IsExpandableBinding) should be updated consequently with other properties of the view model. For example:
myRowModel.Name = "New name";
myRowModel.IsExpandable = false;
To work this around, use the IsExpandable property of GridViewRow. You can data bind it using the RowStyle property of RadGridView. Or alternatively, set the IsPropertyChangedAggregationEnabled property of RadGridView to False.
Some of the rows of the RadGridView control are missing, when placed inside a RadPane and one of the newer themes is set via StyleManager.
As a workaround, set the UseLayoutRounding property of the RadGridView control to False.
Currently, to modify the background color of this element, the default control template of the GridViewCell element needs to be extracted, and the VisualState with x:Name="Highlighted" would need to be customized.
We could include an API for modifying the background color of the HighlightTextBlock element, when it is highlighted.
Opening the filter control of the RadGridView control with Xaml binaries in certain themes will throw the following exception:
System.Windows.Markup.XamlParseException: 'Provide value on 'System.Windows.Markup.StaticResourceHolder' threw an exception.'
Exception: Cannot find resource named 'NullToVisibilityConverter'. Resource names are case-sensitive.
Hi
I have a grid where some rows contain child rows. In order to control which rows have the "+" expander icon I use the IsExpandableBinding property. I also have a toolbar which contains a convenience button to collapse all the expanded rows.
This button is bound to a handler which called RasGridView.CollapseAllHierarchyItems(), but this does not have any effect. I've tried removing the IsExpandableBinding property, and the collapse mechanism then works (but I get unwanted expanders on every row).
Currently, the range of the ScaleFactor property is between 0.1 and 4.0. We could include API to allow the user to set minimum and maximum boundaries that are between the default range (0.1 and 4.0).
For example:
- MinimumScaleFactor=0.8
- MaximumScaleFactor = 1.5