wpf app全局变量传参方法（代码片段 ）

清空某行绑定的行数据：

    int RowIndex = datagrid.SelectedIndex;
  _Table.Rows[RowIndex]["AVERAGE_PRICE"] = DBNull.Value;

弹出层对象 ：（用于弹出二级页面）

  /// 弹出层对象  
         public static NavigationWindow window = null;
         #region 使用NavigationWindow弹出页面
         private void ShowNavigationWindow(string title, string uri, int width, int height)
         {
             try
             {
                 window = new NavigationWindow();//创建窗体对象
                 window.Title = title;
                 window.MaxHeight = height;
                 window.MaxWidth = width;
                 window.Width = this.ActualWidth;
                 window.Height = this.ActualHeight;
                 window.WindowStyle = WindowStyle.ToolWindow;//设置边框样式
                 window.WindowStartupLocation = WindowStartupLocation.CenterScreen;//设置显示位置
                 window.ResizeMode = ResizeMode.NoResize;//设置显示
                 window.Source = new Uri(uri, UriKind.Relative);//设置url
                 window.ShowsNavigationUI = false;
                 window.ShowInTaskbar = false;
                 window.ShowDialog();
                 window.Close();
             }
             catch(Exception ex){

             }

         }

将变量赋值给app中的全局变量

  string backgoodsid = ""; string backgoodscode = "";
             DataGridRow row = sender as DataGridRow;
             var cell = row.Item;
             DataRowView item = cell as DataRowView;
             if (item != null)
             {
                 backgoodsid = item[].ToString();
             }
             if (item != null)
             {
                 backgoodscode = item[].ToString();
             }
             string Startdate = STARTDATE.Text;
             string Enddate = ENDDATE.Text;
             string a = StaffSearchType.Text;
             (Application.Current as App).BackgoodsCode = backgoodscode;
             (Application.Current as App).Backgoodsid = backgoodsid;
             (Application.Current as App).StartDate = Startdate;
             (Application.Current as App).EndDate = Enddate;
             (Application.Current as App).window = a;

在二级页面获取数据

   #region 获取数据

             if ((Application.Current as App).BackgoodsCode != "")
             {
                 backgoodscode = (Application.Current as App).BackgoodsCode;
             }
             if((Application.Current as App).Backgoodsid != "")
             {
                 backgoodsid= (Application.Current as App).Backgoodsid;
             }
             if ((Application.Current as App).Type != "")
             {
                 type = (Application.Current as App).Type;
             }
             if ((Application.Current as App).StartDate != "")
             {
                 Startdate = (Application.Current as App).StartDate;
             }
             if ((Application.Current as App).EndDate != "")
             {
                 Enddate = (Application.Current as App).EndDate;
             }
             if ((Application.Current as App).window != "")
             {
                 a = (Application.Current as App).window;
             }
             #endregion