Datagrid从另一个窗口向datatable添加项目
本文关键字:datatable 添加 项目 窗口 另一个 Datagrid | 更新日期: 2023-09-27 17:50:16
我的程序出了点小问题。我试图添加项目到我的数据表,然后让它显示在我的数据网格。我可以做到这一点,从我的主页一个简单的代码,但我想要一个外部页面发送结果给我,但我不能找出我在这里做错了什么。
主窗口
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Data;
namespace Træner_Program
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
Display();
}
public DataTable dt = new DataTable();
public DataTable dtBind = new DataTable();
public void Display()
{
//I create the data in memory
//usually the date is get from DataBase and cached in memory to enhance the performance
dt = new DataTable();
dt.Columns.Add("Øvelse");
dt.Columns.Add("Vægt");
dt.Columns.Add("Sæt");
dt.Columns.Add("Gentagelser");
dt.Columns.Add("Pause");
dtBind = dt.Copy();
Binding bind = new Binding();
bind.Source = dtBind;
this.dtgPlan.SetBinding(ListView.ItemsSourceProperty, bind);
}
public void AddRow(string Øvelse, string Vægt, string Sæt, string Gentagelser, string Pause)
{
DataRow dr = dt.NewRow();
dr["Øvelse"] = Øvelse;
dr["Vægt"] = Vægt;
dr["Sæt"] = Sæt;
dr["Gentagelser"] = Gentagelser;
dr["Pause"] = Pause;
dt.Rows.Add(dr);
dtBind = dt.Copy();
Binding bind = new Binding();
bind.Source = dtBind;
this.dtgPlan.SetBinding(ListView.ItemsSourceProperty, bind);
}
private void btnGem_Click(object sender, RoutedEventArgs e)
{
//this is the working command from mainpage
//AddRow("Bænkpres", "80", "3", "10", "50");
}
private void btnTilføj_Click(object sender, RoutedEventArgs e)
{
var tilføjØvelse = new Tilføj_Øvelse();
tilføjØvelse.Show();
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
namespace Træner_Program
{
/// <summary>
/// Interaction logic for Tilføj_Øvelse.xaml
/// </summary>
public partial class Tilføj_Øvelse : Window
{
MainWindow mw = new MainWindow();
public Tilføj_Øvelse()
{
InitializeComponent();
}
private void btnTilføj_Click(object sender, RoutedEventArgs e)
{
mw.AddRow("Bænkpres", "80", "3", "10", "50");
Close();
}
private void btnAnuller_Click(object sender, RoutedEventArgs e)
{
Close();
}
}
}
这是因为您正在创建一个新的主窗口,而不是使用调用子窗口的初始主窗口。
一个简单的修复方法是将父主窗口的引用传递给子窗口,如下所示:更新子节点:
public partial class Tilføj_Øvelse : Window
{
MainWindow mw;
public Tilføj_Øvelse(MainWindow mainWindow)
{
InitializeComponent();
mw = mainWindow;
}
private void btnTilføj_Click(object sender, RoutedEventArgs e)
{
mw.AddRow("Bænkpres", "80", "3", "10", "50");
Close();
}
private void btnAnuller_Click(object sender, RoutedEventArgs e)
{
Close();
}
}
然后更新对它的调用:
private void btnTilføj_Click(object sender, RoutedEventArgs e)
{
var tilføjØvelse = new Tilføj_Øvelse(this);
tilføjØvelse.Show();
}
不过,最好的(也是推荐的)方法是使用MVVM模式并为这两个Windows创建一个共享的ViewModel。