protected internal virtual void SetupDisplayMemberBinding(DataGridContext dataGridContext)
{
// Bind the cell content.
Column column = this.ParentColumn as Column;
if (column != null)
{
BindingBase displayMemberBinding = null;
object dataContext = this.ParentRow.DataContext;
// If the dataContext is our ParentRow, we do not create any binding
if (dataContext != this.ParentRow)
{
// Disable warning for DisplayMemberBinding when internaly used
#pragma warning disable 618
displayMemberBinding = column.DisplayMemberBinding;
#pragma warning restore 618
if (displayMemberBinding == null)
{
if ((dataGridContext == null) || (dataGridContext.ItemsSourceFieldDescriptors == null))
{
throw new InvalidOperationException("An attempt was made to create a DisplayMemberBinding before the DataGridContext has been initialized.");
}
if (!DesignerProperties.GetIsInDesignMode(this))
{
bool isDataGridUnboundItemProperty;
displayMemberBinding = ItemsSourceHelper.AutoCreateDisplayMemberBinding(
column, dataGridContext, dataContext, out isDataGridUnboundItemProperty);
column.IsBoundToDataGridUnboundItemProperty = isDataGridUnboundItemProperty;
}
// Disable warning for DisplayMemberBinding when internaly used
#pragma warning disable 618
column.DisplayMemberBinding = displayMemberBinding;
#pragma warning restore 618
//mark the Column's Binding as AutoCreated.
column.IsBindingAutoCreated = true;
}
}
if (displayMemberBinding != null)
{
m_canBeRecycled = DataCell.VerifyDisplayMemberBinding(displayMemberBinding);
BindingOperations.SetBinding(this, Cell.ContentProperty, displayMemberBinding);
XmlElement xmlElement =
this.GetValue(Cell.ContentProperty) as XmlElement;
if (xmlElement != null)
{
// Convert binding to an InnerXML binding in the case we are bound on a XmlElement
// to be able to refresh the data in the XML.
//under any circumstances, a cell that is bound to XML cannot be recycled
m_canBeRecycled = false;
BindingOperations.ClearBinding(this, Cell.ContentProperty);
this.ClearValue(Cell.ContentProperty);
Binding xmlElementBinding = new Binding("InnerXml");
xmlElementBinding.Source = xmlElement;
xmlElementBinding.Mode = BindingMode.TwoWay;
xmlElementBinding.UpdateSourceTrigger = UpdateSourceTrigger.Explicit;
BindingOperations.SetBinding(this, Cell.ContentProperty, xmlElementBinding);
}
}
}
}
/// <summary>
/// Gets current background brush for cell.
/// </summary>
/// <param name="cell">Cell.</param>
/// <returns>Current background brush.</returns>
private Brush _GetBackgroundBrushForCell(DataCell cell)
{
Debug.Assert(cell != null);
// Get layoutroot to get access to background brushes.
Grid layoutRootGrid = _GetLayoutRootGrid(cell);
// Get datagridcontrol to check is location first in collection.
DataGridControl dataGridControl =
XceedVisualTreeHelper.FindParent<DataGridControl>(cell);
int indexOfItem = -1;
try
{
// Workaround: Sometimes grid throws exception.
indexOfItem = dataGridControl.Items.IndexOf(cell.DataContext);
}
catch { }
Brush backgroundBrush;
if (indexOfItem == 0)
{
// Use "Add location" string for first item.
backgroundBrush =
(Brush)layoutRootGrid.Resources[AddLocationBrushResourceName];
}
else
{
// Use "Add another location" string for other items.
backgroundBrush =
(Brush)layoutRootGrid.Resources[AddAnotherLocationBrushResourceName];
}
return backgroundBrush;
}
/// <summary>
/// Walk through visual tree and get Layout root grid.
/// </summary>
/// <param name="cell">Initial cell.</param>
/// <returns>Layout root grid.</returns>
private Grid _GetLayoutRootGrid(DataCell cell)
{
Debug.Assert(cell != null);
Grid result = null;
FrameworkElement frameworkElement = cell as FrameworkElement;
while (frameworkElement != null)
{
object parent = VisualTreeHelper.GetParent(frameworkElement);
// Get parent.
if (parent != null)
{
frameworkElement = parent as FrameworkElement;
}
else
{
frameworkElement = frameworkElement.Parent as FrameworkElement;
}
// Check grid found.
Grid grid = frameworkElement as Grid;
if (grid != null && grid.Name.Equals(LayoutRootGridName, StringComparison.OrdinalIgnoreCase))
{
result = grid;
break;
}
}
return result;
}
protected internal virtual void SetupDisplayMemberBinding(DataGridContext dataGridContext)
{
// Bind the cell content.
var column = this.ParentColumn as Column;
if (column != null)
{
var displayMemberBinding = default(BindingBase);
var dataItem = this.ParentRow.DataContext;
// If the dataContext is our ParentRow, we do not create any binding
if (dataItem != this.ParentRow)
{
displayMemberBinding = column.GetDisplayMemberBinding();
if (displayMemberBinding == null)
{
if (dataGridContext == null)
{
throw new InvalidOperationException("An attempt was made to create a DisplayMemberBinding before the DataGridContext has been initialized.");
}
if (!DesignerProperties.GetIsInDesignMode(this))
{
var propertyDescription = ItemsSourceHelper.CreateOrGetPropertyDescriptionFromColumn(dataGridContext, column, (dataItem != null) ? dataItem.GetType() : null);
ItemsSourceHelper.UpdateColumnFromPropertyDescription(column, dataGridContext.DataGridControl.DefaultCellEditors, dataGridContext.AutoCreateForeignKeyConfigurations, propertyDescription);
displayMemberBinding = column.GetDisplayMemberBinding();
}
column.IsBindingAutoCreated = true;
}
}
if (displayMemberBinding != null)
{
m_canBeRecycled = DataCell.VerifyDisplayMemberBinding(displayMemberBinding);
BindingOperations.SetBinding(this, Cell.ContentProperty, displayMemberBinding);
var xmlElement = this.GetValue(Cell.ContentProperty) as XmlElement;
if (xmlElement != null)
{
// Convert binding to an InnerXML binding in the case we are bound on a XmlElement
// to be able to refresh the data in the XML.
//under any circumstances, a cell that is bound to XML cannot be recycled
m_canBeRecycled = false;
this.ClearDisplayMemberBinding();
var xmlElementBinding = new Binding("InnerXml");
xmlElementBinding.Source = xmlElement;
xmlElementBinding.Mode = BindingMode.TwoWay;
xmlElementBinding.UpdateSourceTrigger = UpdateSourceTrigger.Explicit;
BindingOperations.SetBinding(this, Cell.ContentProperty, xmlElementBinding);
}
}
else
{
this.ClearDisplayMemberBinding();
}
}
else
{
this.ClearDisplayMemberBinding();
}
}
