C# WPF:DataGrid上的水平滚动查看器在重新启动绑定的ObservableCollection时捕捉到右侧
我目前在WPF中遇到一个问题，当重新启动绑定的ObservableCollection时，DataGrid的水平滚动查看器会捕捉到可能的滚动空间的右侧（显示DataGrid最右侧的内容） 即使在调用绑定事件时触发手动将HorizontalOffset设置为0的行为，并在重新绑定列表后立即调用该事件，0也会被忽略，快照会再次转到右侧。我假设这与ScrollViewer中的操作顺序和命令队列有关 这似乎应该是默认行为（我不知道为什么在填充数据时，您会希望滚动条默认捕捉到右侧）。有人知道这个问题的解决方法吗 根据请求，从我的复制项目中删除代码文件 main window.xamlC# WPF:DataGrid上的水平滚动查看器在重新启动绑定的ObservableCollection时捕捉到右侧,c#,wpf,C#,Wpf,我目前在WPF中遇到一个问题，当重新启动绑定的ObservableCollection时，DataGrid的水平滚动查看器会捕捉到可能的滚动空间的右侧（显示DataGrid最右侧的内容） 即使在调用绑定事件时触发手动将HorizontalOffset设置为0的行为，并在重新绑定列表后立即调用该事件，0也会被忽略，快照会再次转到右侧。我假设这与ScrollViewer中的操作顺序和命令队列有关 这似乎应该是默认行为（我不知道为什么在填充数据时，您会希望滚动条默认捕捉到右侧）。有人知道这个问题的解决
<Window x:Class="WpfScrollViewer.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:WpfScrollViewer"
mc:Ignorable="d"
Title="MainWindow" Height="450" Width="800">
<Window.DataContext>
<local:MainViewModel/>
</Window.DataContext>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<StackPanel Grid.Row="0" Orientation="Horizontal">
<Button Content="Rebind" Command="{Binding RebindCommand}"/>
<Button Content="Clear and Set" Command="{Binding ClearCommand}"/>
</StackPanel>
<DataGrid ItemsSource="{Binding People}" Grid.Row="1" HorizontalScrollBarVisibility="Visible" FontSize="30">
</DataGrid>
</Grid>
namespace WpfScrollViewer
{
public class Person
{
public string FirstNames { get; set; }
public string LastName { get; set; }
public int Age { get; set; }
public string Address { get; set; }
public string PostCode { get; set; }
public string PhoneNumber { get; set; }
}
}
using System;
using System.Windows.Input;
namespace WpfScrollViewer
{
public class DelegateCommand : ICommand
{
private readonly Action _fn;
private readonly Func<bool> _canExecute;
public event EventHandler CanExecuteChanged;
public DelegateCommand(Action fn, Func<bool> canExecute = null)
{
_fn = fn;
_canExecute = canExecute;
}
public bool CanExecute(object parameter)
{
if (_canExecute == null)
{
return true;
}
return _canExecute();
}
public void Execute(object parameter)
{
_fn();
}
}
}
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Windows.Input;
namespace WpfScrollViewer
{
public class MainViewModel : INotifyPropertyChanged
{
private readonly Random _random = new Random();
private ObservableCollection<Person> _people;
public ObservableCollection<Person> People
{
get => _people;
set
{
if (_people == value)
{
return;
}
_people = value;
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(People)));
}
}
public event PropertyChangedEventHandler PropertyChanged;
public ICommand RebindCommand { get; }
public ICommand ClearCommand { get; }
public MainViewModel()
{
RebindCommand = new DelegateCommand(RebindPeople);
ClearCommand = new DelegateCommand(ClearAndSetPeople);
}
private void RebindPeople()
{
People = new ObservableCollection<Person>(GetPeople());
}
private void ClearAndSetPeople()
{
var people = GetPeople();
People.Clear();
foreach (var person in people)
{
People.Add(person);
}
}
private List<Person> GetPeople()
{
var people = new List<Person>
{
new Person
{
FirstNames = "John",
LastName = "Doe",
Address = "17 Random Street",
PostCode = "RN32 2JR",
Age = 31,
PhoneNumber = "07647123456"
},
new Person
{
FirstNames = "Jane",
LastName = "Doe",
Address = "17 Random Street",
PostCode = "RN32 2JR",
Age = 30
},
new Person
{
FirstNames = "Jack",
LastName = "Freens",
Address = "37 Badboi Lane",
Age = 30
},
new Person
{
FirstNames = "Richard",
LastName = "Brodget",
Address = "69 Meme Street",
Age = 31
},
new Person
{
FirstNames = "Sam",
LastName = "Orfitt",
Address = "16 Withernsea Road",
Age = 29
},
new Person
{
FirstNames = "Tom",
LastName = "Orfitt",
Address = "16 Withernsea",
Age = 27
}
};
var rmCount = _random.Next(1, 4);
for (var i = 0; i < rmCount; i++)
{
people.RemoveAt(_random.Next(people.Count));
}
return people;
}
}
}
使用系统；
使用System.Windows.Input；
命名空间WpfScrollViewer
{
公共类DelegateCommand:ICommand
{
私人只读操作_fn；
私有只读功能可执行；
公共事件处理程序CanExecuteChanged；
公共DelegateCommand（操作fn，Func canExecute=null）
{
_fn=fn；
_canExecute=canExecute；
}
公共布尔CanExecute（对象参数）
{
如果（_canExecute==null）
{
返回true；
}
返回_canExecute（）；
}
public void Execute（对象参数）
{
_fn（）；
}
}
}
namespace WpfScrollViewer
{
public class Person
{
public string FirstNames { get; set; }
public string LastName { get; set; }
public int Age { get; set; }
public string Address { get; set; }
public string PostCode { get; set; }
public string PhoneNumber { get; set; }
}
}
using System;
using System.Windows.Input;
namespace WpfScrollViewer
{
public class DelegateCommand : ICommand
{
private readonly Action _fn;
private readonly Func<bool> _canExecute;
public event EventHandler CanExecuteChanged;
public DelegateCommand(Action fn, Func<bool> canExecute = null)
{
_fn = fn;
_canExecute = canExecute;
}
public bool CanExecute(object parameter)
{
if (_canExecute == null)
{
return true;
}
return _canExecute();
}
public void Execute(object parameter)
{
_fn();
}
}
}
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Windows.Input;
namespace WpfScrollViewer
{
public class MainViewModel : INotifyPropertyChanged
{
private readonly Random _random = new Random();
private ObservableCollection<Person> _people;
public ObservableCollection<Person> People
{
get => _people;
set
{
if (_people == value)
{
return;
}
_people = value;
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(People)));
}
}
public event PropertyChangedEventHandler PropertyChanged;
public ICommand RebindCommand { get; }
public ICommand ClearCommand { get; }
public MainViewModel()
{
RebindCommand = new DelegateCommand(RebindPeople);
ClearCommand = new DelegateCommand(ClearAndSetPeople);
}
private void RebindPeople()
{
People = new ObservableCollection<Person>(GetPeople());
}
private void ClearAndSetPeople()
{
var people = GetPeople();
People.Clear();
foreach (var person in people)
{
People.Add(person);
}
}
private List<Person> GetPeople()
{
var people = new List<Person>
{
new Person
{
FirstNames = "John",
LastName = "Doe",
Address = "17 Random Street",
PostCode = "RN32 2JR",
Age = 31,
PhoneNumber = "07647123456"
},
new Person
{
FirstNames = "Jane",
LastName = "Doe",
Address = "17 Random Street",
PostCode = "RN32 2JR",
Age = 30
},
new Person
{
FirstNames = "Jack",
LastName = "Freens",
Address = "37 Badboi Lane",
Age = 30
},
new Person
{
FirstNames = "Richard",
LastName = "Brodget",
Address = "69 Meme Street",
Age = 31
},
new Person
{
FirstNames = "Sam",
LastName = "Orfitt",
Address = "16 Withernsea Road",
Age = 29
},
new Person
{
FirstNames = "Tom",
LastName = "Orfitt",
Address = "16 Withernsea",
Age = 27
}
};
var rmCount = _random.Next(1, 4);
for (var i = 0; i < rmCount; i++)
{
people.RemoveAt(_random.Next(people.Count));
}
return people;
}
}
}
使用系统；
使用System.Collections.Generic；
使用System.Collections.ObjectModel；
使用系统组件模型；
使用System.Windows.Input；
命名空间WpfScrollViewer
{
公共类MainViewModel:INotifyPropertyChanged
{
private readonly Random_Random=new Random（）；
私人可观察的收集人；
公众观察收集人
{
获取=>\u人；
设置
{
如果（_people==值）
{
返回；
}
_人=价值；
PropertyChanged？.Invoke（这是新的propertychangedventargs（name of（People））；
}
}
公共事件属性更改事件处理程序属性更改；
公共ICommand重新绑定命令{get；}
公共ICommand ClearCommand{get；}
公共主视图模型（）
{
RebindCommand=新的委托人命令（REBINDPEOPEN）；
ClearCommand=新的DelegateCommand（ClearAndSetPeople）；
}
私人关系
{
People=新的observeCollection（GetPeople（））；
}
私有void ClearAndSetPeople（）
{
var people=GetPeople（）；
人。清除（）；
foreach（人与人之间的变量）
{
人。添加（人）；
}
}
私有列表GetPeople（）
{
var people=新列表
{
新人
{
FirstNames=“约翰”，
LastName=“Doe”，
地址=“17随机街”，
邮编=“RN32 2JR”，
年龄=31岁，
电话号码=“07647123456”
},
新人
{
FirstNames=“Jane”，
LastName=“Doe”，
地址=“17随机街”，
邮编=“RN32 2JR”，
年龄=30
},
新人
{
FirstNames=“杰克”，
LastName=“Freens”，
地址=“Badboi巷37号”，
年龄=30
},
新人
{
FirstNames=“Richard”，
LastName=“Brodget”，
地址=“Meme街69号”，
年龄=31
},
新人
{
FirstNames=“山姆”，
LastName=“Orfitt”，
地址=“威森西路16号”，
年龄=29
},
新人
{
名字=“汤姆”，
LastName=“Orfitt”，
Address=“16威瑟森西亚”，
年龄=27
}
};
var rmCount=_random.Next（1,4）；
对于（变量i=0；i欢呼声这是由栏目自动生成功能引起的。每次更改数据时，它都会删除所有列（在此阶段中，滚动条位置丢失），并根据传递的数据创建新列。如果静态定义列并使用
AutoGenerateColumns=“False”<DataGrid AutoGenerateColumns="False" ItemsSource="{Binding People}" Grid.Row="1" HorizontalScrollBarVisibility="Visible" FontSize="30">
<DataGrid.Columns>
<DataGridTextColumn Header="FirstNames" Binding="{Binding FirstNames}" />
<DataGridTextColumn Header="LastName" Binding="{Binding LastName}" />
<DataGridTextColumn Header="Age" Binding="{Binding Age}" />
<DataGridTextColumn Header="Address" Binding="{Binding Address}" />
<DataGridTextColumn Header="PostCode" Binding="{Binding PostCode}" />
<DataGridTextColumn Header="PhoneNumber" Binding="{Binding PhoneNumber}" />
</DataGrid.Columns>
</DataGrid>
请与我们分享您的代码和其他问题详细信息。我已经添加了一些示例代码。