/// <summary>
/// Returns XElement Func to reflect the value form XElement collection
/// </summary>
/// <param name="view">CollectionViewAdv</param>
/// <returns>XElement Func </returns>
internal static Func <string, object, object> GetXElementFunc(this CollectionViewAdv view)
{
return((propertyName, record) =>
{
var xElementAttributesProvider = view.GetPropertyAccessProvider() as XElementAttributesProvider;
return xElementAttributesProvider != null?xElementAttributesProvider.GetValue(record, propertyName) : null;
});
}
/// <summary>
/// Returns Binding Func to reflect the value form collection
/// </summary>
/// <param name="view">CollectionView</param>
/// <returns>Binding Func</returns>
internal static Func <string, object, object> GetBindingFunc(this CollectionViewAdv view)
{
return((propertyName, record) =>
{
var provider = view.GetPropertyAccessProvider();
return provider.GetValue(record, propertyName);
});
}
/// <summary>
/// Returns Dynamic Func to reflect the value in dynamic collection
/// </summary>
/// <param name="view">CollectionViewAdv</param>
/// <returns>Dynamic collection Func</returns>
internal static Func <string, object, object> GetDynamicFunc(this CollectionViewAdv view)
{
return((propertyName, record) =>
{
var dynamicProvider = view.GetPropertyAccessProvider() as DynamicPropertiesProvider;
return dynamicProvider != null?dynamicProvider.GetValue(record, propertyName) : null;
});
}
/// <summary>
/// Gets UnBound Func Value for sorting and grouping
/// </summary>
/// <param name="view">View</param>
/// <param name="dataGrid">DataGrid</param>
/// <param name="column">Column</param>
/// <returns>returns Func<string, object, object></returns>
internal static Func <string, object, object> GetUnboundFunc(this CollectionViewAdv view, SfDataGrid dataGrid, GridUnBoundColumn column)
{
if (column.UnBoundFunc != null)
{
return(column.UnBoundFunc);
}
column.UnBoundFunc = (columnName, record) =>
{
if (dataGrid != null)
{
return(dataGrid.GetUnBoundCellValue(column, record));
}
else
{
return(null);
}
};
return(column.UnBoundFunc);
}
public GridVirtualizingTopLevelGroup(SfDataGrid grid, CollectionViewAdv collectionView)
: base(collectionView)
{
dataGrid = grid;
}
public GridDataTopLevelGroup(SfDataGrid grid, CollectionViewAdv collectionView)
: base(collectionView)
{
datagrid = grid;
}
/// <summary>
/// Return ValueFunc for based on corresponding column and DataOperationMode
/// </summary>
/// <param name="view">CollectionViewAdv</param>
/// <param name="column">GridColumn</param>
/// <param name="operation">DataOperation</param>
/// <param name="mode">DataReflectionMode</param>
/// <param name="useBindingValue">useBindingValue</param>
/// <returns>Func<string, object, object></returns>
public static Func <string, object, object> GetValueFunc(this CollectionViewAdv view, GridColumn column, DataOperation operation, DataReflectionMode mode, bool useBindingValue)
{
if (operation == DataOperation.Grouping)
{
var pgd = view.GroupDescriptions.OfType <ColumnGroupDescription>().FirstOrDefault(g => g.PropertyName == column.mappingName);
if (pgd != null && pgd.Converter != null)
{
Func <string, object, object> groupConverterFunc = (columnName, record) =>
{
//The ColumnName and the PropertyReflector helps to get the value to Group the Column with the Intervals.
if (pgd.Converter is IColumnAccessProvider)
{
(pgd.Converter as IColumnAccessProvider).ColumnName = columnName;
(pgd.Converter as IColumnAccessProvider).PropertyReflector = view.GetPropertyAccessProvider();
}
return(pgd.Converter.Convert(record, record.GetType(), column, CultureInfo.CurrentCulture.GetCulture()));
};
return(groupConverterFunc);
}
}
if (column != null && column.IsUnbound)
{
var unboundcolumn = column as GridUnBoundColumn;
var dataGrid = view.GetDataGrid() as SfDataGrid;
return(view.GetUnboundFunc(dataGrid, unboundcolumn));
}
else if (mode == DataReflectionMode.Default)
{
if (column != null && column.ValueBinding != null && column.UseBindingValue)
{
return(view.GetBindingFunc());
}
#if WPF
if (view.IsITypedListSource())
{
var func = view.GetITypedListFunc(column.MappingName);
if (func != null)
{
return(func);
}
}
#endif
if (view.IsDynamicBound)
{
return(view.GetDynamicFunc());
}
if (view.IsXElementBound)
{
return(view.GetXElementFunc());
}
}
else if (mode == DataReflectionMode.Display)
{
return((propname, record) => view.GetPropertyAccessProvider().GetDisplayValue(record, propname, useBindingValue));
}
else if (mode == DataReflectionMode.Value)
{
return((propName, record) => view.GetPropertyAccessProvider().GetValue(record, propName, useBindingValue));
}
return(null);
}
/// <summary>
/// Return XElement ExpressionFunc to reflect the value form XElement collection
/// </summary>
/// <param name="view">CollectionViewAdv</param>
/// <returns>XElement ExpressionFunc</returns>
internal static System.Linq.Expressions.Expression <Func <string, object, object> > GetXElementAttributeFunc(this CollectionViewAdv view)
{
var func = view.GetXElementFunc();
return((propertyName, record) => func(propertyName, record));
}
/// <summary>
/// Returns ValueExpressionFunc for corresponding column and data operation
/// </summary>
/// <param name="view">CollectionViewAdv</param>
/// <param name="column">Column</param>
/// <param name="operation">DataOperation</param>
/// <param name="mode">DataReflectionMode</param>
/// <param name="useBindingValue">useBindingvalue</param>
/// <returns>Expression<Func<string, object, object>></returns>
public static System.Linq.Expressions.Expression <Func <string, object, object> > GetValueExpressionFunc(this CollectionViewAdv view, GridColumn column, DataOperation operation, DataReflectionMode mode, bool useBindingValue)
{
if (column != null && column.IsUnbound)
{
var unboundcolumn = column as GridUnBoundColumn;
var dataGrid = view.GetDataGrid() as SfDataGrid;
view.GetUnboundFunc(dataGrid, unboundcolumn);
if (unboundcolumn.UnBoundFunc != null)
{
return((columnName, record) => unboundcolumn.UnBoundFunc(columnName, record));
}
return(null);
}
else if (mode == DataReflectionMode.Default)
{
if (column != null && column.ValueBinding != null && column.UseBindingValue)
{
return(view.GetBindingExpressionFunc());
}
#if WPF
if (view.IsITypedListSource())
{
var func = view.GetITypedListExpressionFunc(column.MappingName);
if (func != null)
{
return(func);
}
}
#endif
if (view.IsDynamicBound)
{
return(view.GetDynamicExpressionFunc());
}
else if (view.IsXElementBound)
{
return(view.GetXElementAttributeFunc());
}
}
else if (mode == DataReflectionMode.Display)
{
return((propname, record) => view.GetPropertyAccessProvider().GetDisplayValue(record, propname, useBindingValue));
}
else if (mode == DataReflectionMode.Value)
{
return((propName, record) => view.GetPropertyAccessProvider().GetValue(record, propName, useBindingValue));
}
return(null);
}
