如何在WPF中每次按下按钮时都向DataGrid添加数据

ThilinaW 发表于 Dev

蒂丽娜·W

我的WPF应用程序有两个文本框和一个DataGrid。有一个名为“添加”的按钮。我想在每次按下按钮时将保存在文本框中的数据添加到DataGrid中。在我的代码中，第一次仅更新DataGrid。我该如何解决。

XAML

  <TextBox x:Name="txt_description" Margin="0,10,20,15"/>
  <TextBox x:Name="txt_quantity" Margin="0,10,20,15" PreviewKeyDown="txt_quantity_PreviewKeyDown"/>
  <Button x:Name="btn_Add" Margin="0,0,0,15" Content="Add" FontSize="18" HorizontalAlignment="Left" VerticalAlignment="Bottom" Width="100" Click="btn_Add_Click" />
<DataGrid x:Name="dgd_items" Margin="10,10,10,10" FontSize="16"/>

C＃

 private void btn_Add_Click(object sender, RoutedEventArgs e)
    {
        ItemsDto obj = new ItemsDto();
        obj.ItemCode = cmb_ItemCode.SelectedItem.ToString();
        obj.descripition = txt_description.Text;
        obj.qty = Convert.ToInt32(txt_quantity.Text);

        Dto.Add(obj);

        dgd_items.ItemsSource = Dto;

    }

真实案例

这是有关如何执行此操作的示例：

XAML

<Window x:Class="SolutionDatagrid.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*"></ColumnDefinition>
            <ColumnDefinition Width="300"></ColumnDefinition>
        </Grid.ColumnDefinitions>
        <DataGrid x:Name="dgCustomers" ItemsSource="{Binding Customers}" Grid.Column="0"></DataGrid>
        <StackPanel Grid.Column="1" Orientation="Vertical" Margin="10">
            <TextBlock Margin="10" FontWeight="Bold">Customer Information:</TextBlock>

            <StackPanel Orientation="Vertical" Margin="10">
                <TextBlock>First Name</TextBlock>
                <TextBox x:Name="txtFirstName"/>
            </StackPanel>

            <StackPanel Orientation="Vertical" Margin="10">
                <TextBlock>Last Name</TextBlock>
                <TextBox x:Name="txtLastName"/>
            </StackPanel>

            <StackPanel Orientation="Vertical" Margin="10">
                <TextBlock>Favourite Color</TextBlock>
                <ComboBox x:Name="cbxColor" ItemsSource="{Binding Colours}"/>
            </StackPanel>

            <TextBlock Margin="10" FontWeight="Bold">Actions:</TextBlock>
            <Button Margin="10" Height="50" Click="Button_Add_Click">Add Data</Button>
            <Button Margin="10" Height="50" Click="Button_Reset_Click">Reset</Button>
        </StackPanel>
    </Grid>
</Window>

代码

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
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;

namespace SolutionDatagrid
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            this.InitializeComponent();

            // List of Customers
            this.Customers = new ObservableCollection<Customer>();

            // List of Colours
            this.Colours = new List<string>
            {
                "Red", "Orange", "Yellow", "Green", "Blue", "Indigo", "Violet"
            };

            this.DataContext = this;
        }

        // Properties
        public List<string> Colours { get; set; }
        public ObservableCollection<Customer> Customers { get; set; }


        // Button Click Events
        private void Button_Add_Click(object sender, RoutedEventArgs e)
        {
            // Variables to hold customer data
            string firstName = txtFirstName.Text;
            string lastName = txtLastName.Text;
            string colour = cbxColor.SelectedItem.ToString();

            // If our data is valid
            if(firstName !=null && lastName!=null && colour!=null)
            {
                // Create new customer using data
                Customer customer = new Customer { Name = firstName, Surname = lastName, Colour = colour };

                // Add the new cutomer to the existing list of customers
                this.Customers.Add(customer);
            }
        }

        private void Button_Reset_Click(object sender, RoutedEventArgs e)
        {
            this.Customers.Clear();
        }
    }

    // Customer Class
    public class Customer
    {
        // Properties
        public string Name { get; set; }
        public string Surname { get; set; }
        public string Colour { get; set; }
    }
}