如何让代码在Datagrid重新绑定itemsource并加载完毕之后执行?

        public static void ConvertRow()
        {
            TenantsListWindow TLW = (TenantsListWindow)TL;
            List<Quartecost> vd1 = TLW.tenantsDg.ItemsSource as List<Quartecost>;
            for (int i = 0; i < vd1.Count; i++)
            {
                //Quartecost quarte = TLW.tenantsDg.Items[i] as Quartecost;
                //string state = quarte.State.Trim();
                if (vd1[i].state == "已交")
                {
                    var row = TLW.tenantsDg.ItemContainerGenerator.ContainerFromItem(quarte) as DataGridRow;
                    row.Background = new SolidColorBrush(Colors.DarkSeaGreen);
                }
                else
                {
                    var row = TLW.tenantsDg.ItemContainerGenerator.ContainerFromItem(quarte) as DataGridRow;
                    row.Background = new SolidColorBrush(Colors.IndianRed);
                }
            }
        }

我把它放在窗口的loaded事件中不行,我把它放在Datagrid的loaded事件中也不行

我把它放在窗口的loaded事件中不行,我把它放在Datagrid的loaded事件中也不行
我把它放在窗口的loaded事件中不行,我把它放在Datagrid的loaded事件中也不行
就放在原来的位置

我把它放在窗口的loaded事件中不行,我把它放在Datagrid的loaded事件中也不行
我把它放在窗口的loaded事件中不行,我把它放在Datagrid的loaded事件中也不行
就放在原来的位置放在窗口的ContentRendered里没用啊?如果放在这里的话我选择类型点确定之后就不执行了

我是想在选择类型之后点确定然后把过滤过的集合重新绑定到ItemSource,然后等他加载完执行那个函数

还是一样..
调用代码是这样的        private void leixingquedingBut_Click(object sender, RoutedEventArgs e)
        {
            ComboBoxItem cbi = (ComboBoxItem)leixingshaixuanCb.SelectedItem;
            string item;
            if (cbi != null)
            {
                item = (string)cbi.Tag;                tenantsDg.ItemsSource = QuartecostDAL.GetAllCommunity(item,community);
                CommunityManagerSystemTools.ConvertRowEdit();
                //update = true;
            }
            else
                MessageBox.Show("请选择一个类型","提示",MessageBoxButton.OK,MessageBoxImage.Error);
        }

QuartecostDAL.GetAllCommunity(item,community)获取数据为空不执行方法
我测试一切正常断点看下是不是那没那到数据
row 有没有拿到

有值哦         public static List<Quartecost> GetAllCommunity(string filter,string community)
        {
            string sql = "select * from T_Quartecost", name;
            bool state;
            DataTable table = CommunityManagerSystemTools.ExecuteDataTable(sql);
            List<Quartecost> quartecostlist = new List<Quartecost>();
            for (int i = 0; i < table.Rows.Count; i++)
            {
                DataRow row = table.Rows[i];
                Quartecost quartecost = new Quartecost();
                quartecost.Id = (long)row["ID"];
                quartecost.Tid = (long)row["TID"];
                quartecost.Name = (string)row["Name"];
                name = quartecost.Name.Trim();                quartecost.Type = (string)row["Type"];
                quartecost.Waterdosage = Convert.ToDecimal(row["Waterdosage"]);
                quartecost.Watercost = Convert.ToDecimal(row["Watercost"]);
                quartecost.Electricitydosage = Convert.ToDecimal(row["Electricitydosage"]);
                quartecost.Electricitycost = Convert.ToDecimal(row["Electricitycost"]);
                quartecost.Healthcost = Convert.ToDecimal(row["Healthcost"]);
                quartecost.Elevatorcost = Convert.ToDecimal(row["Elevatorcost"]);
                quartecost.Heatingcost = Convert.ToDecimal(row["Heatingcost"]);
                quartecost.Total = Convert.ToDecimal(row["Total"]);                Tenants tenants = TenantsDAL.GetByName(name);
                if (tenants.Community.Trim() == community)
                {
                    state = Convert.ToBoolean(row["State"]);
                    if (state == false)
                    {
                        quartecost.State = "未交";
                    }
                    else
                        quartecost.State = "已交";                    quartecost.Time = (string)row["Time"];
                    quartecost.IsDel = Convert.ToBoolean(row["IsDel"]);
                    quartecost.IsInput = Convert.ToBoolean(row["IsInput"]);                    if (quartecost.IsDel == false)
                    {
                        if (filter != null)
                        {
                            if (quartecost.Type.Trim() == CommunityManagerSystemTools.ConvertDbType(filter))
                                quartecostlist.Add(quartecost);
                            else if (quartecost.State == filter)
                                quartecostlist.Add(quartecost);
                        }
                        else
                        {
                            quartecostlist.Add(quartecost);
                        }
                    }
                }
            }
            return quartecostlist;
        }
这是GetAllCommunity方法的代码

但ConvertRowEdit(就是你给我那个)里面的Row是空的

就是获取不到row对象啊我晕死

GetAllCommunity 获取不到数据row当然就为空了
问题应该是在GetAllCommunity这个方法上
加一个处理
if (cbi != null)
            {
                item = (string)cbi.Tag;

                tenantsDg.ItemsSource = QuartecostDAL.GetAllCommunity(item, community);
if(( TLW.tenantsDg.ItemsSource as List<Quartecost>).count>0)
{
执行ConvertRow函数的
}
            }

还是一样row是空的而且有个很诡异的解决方法这样就能解决.....
我Q 3029913 能否帮忙看下?

    if (vd1[i].state == "已交")
                {
                    （TLW.tenantsDg.ItemContainerGenerator.ContainerFromItem(quarte) as DataGridRow）.Background = new SolidColorBrush(Colors.DarkSeaGreen);
                }

那有问题？我没看出来问题在那？我加了个MessageBox.show就好了.不加就是空

那有问题？我没看出来问题在那？你看我在var row之前加了一个MessageBox.show()方法,之后就有值了,否则row就是null的...
这到底是什么问题....
能不能帮我远程看下? 我QQ 3029913

DataGrid是Lazy的，它只在需要显示的时候才会去创建在显示区域范围内DataGridRow。如果想让DataGrid在设置ItemSource会生成全部的DataGridRow，要这样：
dataGrid.ItemsSource = DAL.GetAll();
if (!Window.GetWindow(dataGrid).IsVisible) Window.GetWindow(dataGrid).Show();
dataGrid.UpdateLayout();
foreach (var item in dataGrid.Items)
dataGrid.ScrollIntoView(item);
然后就可以调用dataGrid.ItemContainerGenerator.ContainerFromItem(item);取到DataGridRow。上面这种做法是不可取的，因为要一次性生成全部的DataGridRow，性能会有很大影响。
正确的做法是监听DataGridRow的加载事件，当row创建的时候再去对它进行处理：
dataGrid.LoadingRow += dataGrid_LoadingRow;void dataGrid_LoadingRow(object sender, DataGridRowEventArgs e)
{
e.Row.Background =
}

            DataGridRow row = e.Row;
            Quartecost quartecost = (Quartecost)row.DataContext;

            if(quartecost.State.Trim() == "已交")
                row.Background = new SolidColorBrush(Colors.DarkSeaGreen);
            else
                row.Background = new SolidColorBrush(Colors.IndianRed);
            //放在DataGrid的LoadingRow事件里我把答案贴出来吧,免得又有新手跟我一样,就这几行代码找了将近一礼拜.

调试易

如何让代码在Datagrid重新绑定itemsource并加载完毕之后执行?

解决方案 »