wpf datagrid如何添加汇总行

Question

怎么添加汇总行啊……求高手

Answer 1

看下这个例子：<Window x:Class="WpfApp1.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="" Height="400" Width="550" >
    <DockPanel>
        <StackPanel DockPanel.Dock="Bottom" Orientation="Horizontal" HorizontalAlignment="Right">
            <TextBlock>Total:</TextBlock>
            <TextBlock Margin="30, 0, 0, 0" Text="{Binding TotalDebit}" />
            <TextBlock Margin="30, 0, 30, 0" Text="{Binding TotalCredit}" />
        </StackPanel>
        <DataGrid ItemsSource="{Binding Items}" />
    </DockPanel>
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Windows;namespace WpfApp1
{
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent(); var r = new Random();
var testData = Enumerable.Range(1, 7).Select(i => new Voucher()
{
No = 145+i,
Date = DateTime.Now.AddDays(r.Next(-5, 5)),
Type = (AccountType)r.Next(2),
Debit = r.Next(100),
Credit = r.Next(100),
});

this.DataContext = new Vouchers(testData);
}
} public class Vouchers : ObservableObject
{
public Vouchers(IEnumerable<Voucher> items)
{
Items = new ObservableCollection<Voucher>(items);
Items.CollectionChanged += (s, e)=> CalcTotals();
Items.ToList().ForEach(item => item.PropertyChanged += (s, e) => CalcTotals());
CalcTotals();
} public ObservableCollection<Voucher> Items { get; private set; } void CalcTotals()
{
TotalCredit = Items.Sum(x => x.Credit);
TotalDebit = Items.Sum(x => x.Debit);
} private decimal _totalDebit;
public decimal TotalDebit
{
get { return _totalDebit; }
set { _totalDebit = value; OnPropertyChanged("TotalDebit"); }
} private decimal _totalCredit;
public decimal TotalCredit
{
get { return _totalCredit; }
set { _totalCredit = value; OnPropertyChanged("TotalCredit"); }
}
}  
 
public enum AccountType { FinancialAccount, OtherAccount }
public class Voucher : ObservableObject
{
public int No { get; set; }
public DateTime Date { get; set; }
public AccountType Type { get; set; }
public string Account { get; set; }
public string Memo { get; set; }

private decimal _debit;
public decimal Debit
{
get { return _debit; }
set { _debit = value; OnPropertyChanged("Debit"); }
} private decimal _credit;
public decimal Credit
{
get { return _credit; }
set { _credit = value; OnPropertyChanged("Credit"); }
}
} public class ObservableObject : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
protected void OnPropertyChanged(string propertyName)
{
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
}