private void CreateFilters() { string dataMember = this.column.DataMemberBinding.Path.Path; this.compositeFilter = new CompositeFilterDescriptor(); this.fromFilter = new Telerik.Windows.Data.FilterDescriptor(dataMember , Telerik.Windows.Data.FilterOperator.IsGreaterThanOrEqualTo , null); this.compositeFilter.FilterDescriptors.Add(this.fromFilter); this.toFilter = new Telerik.Windows.Data.FilterDescriptor(dataMember , Telerik.Windows.Data.FilterOperator.IsLessThanOrEqualTo , null); this.compositeFilter.FilterDescriptors.Add(this.toFilter); }