NG2-applyCSScontion based

<tr *ngFor="let rowdata of TableRows">
          <td><a routerLink="{{rowdata.sysid}}">{{rowdata.date}}</a></td>      --> link to route
          <td [class.mycls]=getclass(rowdata)>  {{rowdata.title}}</td>         -->No need to make {{rowdata.weekly}}

</tr>

components.ts
--------------

getTableData(): void {
this._Service.getData()
    .subscribe(
res => {
this.TableData =  res;
this.TableRows = res.rows;
}
)
}

getclass(color){
if(color.weekly == 1){
return true;
}
}


service.ts
-----------

getData(): Observable<any> {
        return this._http.get('./app/systemMain/data.json')
                         .map(response => response.json())

    }