//Simple helper method which creates the FilterColumnInfo object for a column. If a binding
//is defined for the column we use that. If that fails we fallback to using the SortMemberPath
private FilterColumnInfo CreateFilterColumnInfo(DataGridColumn column)
{
var col = new FilterColumnInfo();
var boundColumn = column as DataGridBoundColumn;
if (column != null)
{
if (boundColumn != null && column.SortMemberPath == null)
{
col.PropertyPath = boundColumn.Binding.Path.Path;
try
{
var propertyType = col.PropertyType = FilterType.GetProperty(boundColumn.Binding.Path.Path).PropertyType;
if (propertyType != null)
{
col.PropertyType = propertyType;
}
}
catch (Exception)
{
var t1 = typeof(String);
col.PropertyType = new TypeDelegator(t1);
}
col.Converter = boundColumn.Binding.Converter;
col.ConverterCultureInfo = boundColumn.Binding.ConverterCulture;
col.ConverterParameter = boundColumn.Binding.ConverterParameter;
}
else if (column.SortMemberPath.Length > 0)
{
col.PropertyPath = column.SortMemberPath;
try
{
var propertyType = FilterType.GetProperty(column.SortMemberPath).PropertyType;
if (propertyType != null)
{
if (propertyType == typeof(DateTime?))
{
propertyType = typeof(DateTime);
}
col.PropertyType = propertyType;
}
}
catch (Exception)
{
var t1 = typeof(String);
col.PropertyType = new TypeDelegator(t1);
}
}
}
return(col);
}
/// <summary>
/// If a filterColumnInfo is set, the control is visible. As each ColumnOptionControl is loaded in the grid, the relating column
/// is used to build FilterColumnInfo for the control.
/// </summary>
/// <param name="filterColumnInfo">Binding information about the column</param>
internal void ResetOptionValues(FilterColumnInfo filterColumnInfo)
{
FilterColumnInfo = filterColumnInfo;
if (!CanGroup && !CanPin)
{
Visibility = Visibility.Collapsed;
}
else
{
if (!string.IsNullOrWhiteSpace(filterColumnInfo.PropertyPath))
{
Visibility = Visibility.Visible;
}
else
{
Visibility = Visibility.Collapsed;
}
}
}
/// <summary>
/// ResetFilterValues is called when the column is bound ColumnFilterHeader
/// </summary>
/// <param name="filterColumnInfo">Information about the column binding object</param>
internal void ResetFilterValues(FilterColumnInfo filterColumnInfo)
{
Visibility = Visibility.Collapsed;
if (Column != null)
{
// foreach (var i in DistinctPropertyValues.Where(i => i.IsChecked))
// i.IsChecked = false;
// DistinctPropertyValues.Clear();
FilterText = string.Empty;
_boundColumnPropertyAccessor = null;
FilterColumnInfo = filterColumnInfo;
if (FilterColumnInfo.PropertyPath.Length > 0)
{
// if (FilterColumnInfo.PropertyPath.Contains('.'))
// throw new ArgumentException(string.Format("This version of the grid does not support a nested property path such as '{0}'. Please make a first-level property for filtering and bind to that.", FilterColumnInfo.PropertyPath));
Visibility = System.Windows.Visibility.Visible;
ParameterExpression arg = System.Linq.Expressions.Expression.Parameter(typeof(object), "x");
System.Linq.Expressions.Expression expr = System.Linq.Expressions.Expression.Convert(arg, Grid.FilterType);
try
{
expr = System.Linq.Expressions.Expression.Property(expr, Grid.FilterType, FilterColumnInfo.PropertyPath);
}
catch (Exception)
{
}
System.Linq.Expressions.Expression conversion = System.Linq.Expressions.Expression.Convert(expr, typeof(object));
_boundColumnPropertyAccessor = System.Linq.Expressions.Expression.Lambda <Func <object, object> >(conversion, arg).Compile();
}
else
{
Visibility = Visibility.Collapsed;
}
ConfigureFilterOptions();
}
}
