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[0].ToString();
            }
            if (item != null)
            {
                backgoodscode = item[4].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