带分页的筛选器在带mdInput的angular2中不工作

问题:

  When we are in the 1st page with index 1 the mdInput filter works as expected but when we are in the 2nd page i,e index 2 filter starts working form 2nd page only not working for 1st page and 3rd page.

预期：

      Even we are in 2nd page filter should work by taking all the pages.Could some one help me....

演示：

TS代码如下：

                            <md-paginator #paginator
                                [length]="totalLength"
                                [pageIndex]="0"
                                [pageSize]="5"
                                [pageSizeOptions]="[5, 10, 25, 100]"
                                (page)="pageEvent = $event; onPaginateChange($event)">
                            </md-paginator>
                        </ng-container>

下面显示的是在表中动态加载数据的.ts文件。我还包括分页指令mdInput

export class DummyDataSource extends DataSource<any> 
{
    _filterChange = new BehaviorSubject('');
    get filter(): string { return this._filterChange.value; }

    set filter(filter: string) { this._filterChange.next(filter); }
    filteredData: ICatAnalysisProjectViewModel[] = [];
    filterstring: string ;
    constructor(private _catAnalysisProjectsDatabase: CatAnalysisProjectsDatabase , private _paginator: MdPaginator) {
        super();
      }
    connect(): Observable<ICatAnalysisProjectViewModel[]> {
        const displayDataChanges = [this._catAnalysisProjectsDatabase.dataChange,
                                     this._paginator.page, this._filterChange];

        return Observable.merge(...displayDataChanges).map(() => {
            this.filteredData = this._catAnalysisProjectsDatabase.data.slice().filter((item: ICatAnalysisProjectViewModel) => {
              let searchStr = (item.ProjectCode).toLowerCase();
              this.filterstring = this.filter.toLowerCase();
              return searchStr.indexOf( this.filterstring) !== -1;
            });
            const startIndex = this._paginator.pageIndex * this._paginator.pageSize;
                        return this.filteredData.splice(startIndex, this._paginator.pageSize) ;

          });
}
    disconnect() {}
}

If any one finds solution please provide solution....
Thanks in Advance......