//构造函数
 public ChartPageViewModel()
 {
     RequestResult = new List <string> {
         "All", "Success", "Error", "OverTime"
     };
     PivotIndex = 0;
     Infos      = new SiteRequestCountInfo();
 }
 //构造函数
 public ChartPageViewModel()
 {
     RequestResult = new List <string> {
         "Success", "Error", "OverTime"
     };
     Type  = "Success";
     Infos = new SiteRequestCountInfo();
 }