C# 将填充列表视图中的这些文本框,当它们更改时,将更改SelectedResult项
现在,要在C# 将填充列表视图中的这些文本框,当它们更改时,将更改SelectedResult项,c#,wpf,xaml,C#,Wpf,Xaml,现在,要在列表视图中添加和删除项目,只需从StudentModel集合(StudentModel.std)中添加和删除即可 注意:此事件处理程序应该是一个ICommand绑定,但我允许您搜索:) 下面是一个完整的示例,希望能帮助解释wpfmvvm 代码: public分部类主窗口:窗口,INotifyPropertyChanged { 公共主窗口() { 初始化组件(); this.DataContext=this; 学生模型=新生(); } 私立学生-学生模式; 公立学生模式 { 获取{re
列表视图
中添加和删除项目,只需从StudentModel
集合(StudentModel.std)中添加和删除即可
注意:此事件处理程序应该是一个ICommand
绑定,但我允许您搜索:)
下面是一个完整的示例,希望能帮助解释wpfmvvm
代码:
public分部类主窗口:窗口,INotifyPropertyChanged
{
公共主窗口()
{
初始化组件();
this.DataContext=this;
学生模型=新生();
}
私立学生-学生模式;
公立学生模式
{
获取{return\u studentModel;}
设置{u studentModel=value;NotifyPropertyChanged(“studentModel”);}
}
私人GetStudents\u结果\u selectedResult;
public GetStudents\u结果SelectedResult
{
获取{return\u selectedResult;}
设置{u selectedResult=value;NotifyPropertyChanged(“selectedResult”);}
}
私有无效按钮2\u单击(对象发送者,路由目标)
{
StudentModel.std.Remove(SelectedResult);
}
公共事件属性更改事件处理程序属性更改;
public void NotifyPropertyChanged(字符串属性)
{
if(PropertyChanged!=null)
{
PropertyChanged(此,新PropertyChangedEventArgs(property));
}
}
}
公立班学生
{
公立学生()
{
std=新的可观察集合();
对于(int i=0;i<100;i++)
{
std.Add(新的GetStudents_结果{Fname=“FirstName”+i,Lname=“LasrName”+i});
}
}
公共可观测集合std{get;set;}
}
公共类GetStudents\u结果:InotifyProperty已更改
{
私有字符串_fname;
私有字符串_lname;
公共字符串Fname
{
获取{return\u fname;}
设置{u fname=value;NotifyPropertyChanged(“fname”);}
}
公共字符串名称
{
获取{return\u lname;}
设置{u lname=value;NotifyPropertyChanged(“lname”);}
}
公共事件属性更改事件处理程序属性更改;
public void NotifyPropertyChanged(字符串属性)
{
if(PropertyChanged!=null)
{
PropertyChanged(此,新PropertyChangedEventArgs(property));
}
}
}
Xaml:
我希望这些信息能有所帮助:)你到底有什么问题?为什么你的可观察集合命名为STD?这是错误的XD你到底有什么问题?为什么你的可观察集合命名为STD?这是错误的xD
public class students
{
ObservableCollection<GetStudents_Result> stdb = new ObservableCollection<GetStudents_Result>();
//public event NotifyCollectionChangedEventHandler CollectionChanged;
public students()
{
AbcdEntities abcdEnt=new AbcdEntities();
List<GetStudents_Result> studentColl = abcdEnt.GetStudents().ToList();
foreach (var item in studentColl)
{
stdb.Add(item);
}
}
//public void onCollectionChange(object sender,NotifyCollectionChangedEventHandler e)
//{
//}
public ObservableCollection<GetStudents_Result> std {get {return stdb;}}
}
<Canvas>
<TextBox Height="23" Canvas.Top="5" Canvas.Left="10" HorizontalAlignment="Left" Margin="10,10,0,0" Name="textBox1" VerticalAlignment="Top" Width="120" />
<TextBox Height="23" Canvas.Top="30" Canvas.Left="10" HorizontalAlignment="Left" Margin="10,10,0,0" Name="textBox2" VerticalAlignment="Top" Width="120" />
<Button Canvas.Left="90" Canvas.Top="65" Content="Remove" Click="button2_Click" Height="23" Name="button2" Width="75" />
<Button Canvas.Left="10" Canvas.Top="65" Content="Save" Height="23" Name="button1" Width="75" Click="button1_Click" />
<ListView Name="listviewStudents" Canvas.Top="100" ItemsSource="{Binding std}" SelectionChanged="ListView_SelectionChanged">
<ListView.View>
<GridView>
<GridViewColumn Header="fname" DisplayMemberBinding="{Binding Path=fname}"></GridViewColumn>
<GridViewColumn Header="lname" DisplayMemberBinding="{Binding Path=lname}"></GridViewColumn>
<GridViewColumn DisplayMemberBinding="{Binding Path=address}"></GridViewColumn>
<GridViewColumn DisplayMemberBinding="{Binding Path=phno}"></GridViewColumn>
<GridViewColumn DisplayMemberBinding="{Binding Path=radio}"></GridViewColumn>
</GridView>
</ListView.View>
</ListView>
</Canvas>
public MainWindow()
{
InitializeComponent();
students std = new students();
this.DataContext = std;
}
private void ListView_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
GetStudents_Result selectedItem = listviewStudents.SelectedItem as GetStudents_Result;
textBox1.Text = selectedItem.fname;
textBox2.Text = selectedItem.lname;
}
private void button1_Click(object sender, RoutedEventArgs e)
{
GetStudents_Result selecteditem = listviewStudents.SelectedItem as GetStudents_Result;
selecteditem.fname = textBox1.Text;
selecteditem.lname = textBox2.Text;
listviewStudents.Items.Refresh();
}
private void button2_Click(object sender, RoutedEventArgs e)
{
listviewStudents.Items.Remove(listviewStudents.SelectedItem);
listviewStudents.Items.Refresh();
}
}
public class students : INotifyPropertyChanged
{
#region PropertyChanged EventHandler
public event PropertyChangedEventHandler PropertyChanged;
void NotifyPropertyChanged(String Property)
{
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs(Property));
}
#endregion
private List<GetStudents_Result> stdb;
public List<GetStudents_Result> std
{
get { return stdb; }
set { stdb = value; NotifyPropertyChanged("std"); }
}
...
public partial class MainWindow : Window, INotifyPropertyChanged
{
public MainWindow()
{
InitializeComponent();
// set the DataContext to the code in this window
this.DataContext = this;
// create youe Student model
StudentModel = new students();
}
// Create a public property of your student Model
private students _studentModel;
public students StudentModel
{
get { return _studentModel; }
set { _studentModel = value; NotifyPropertyChanged("StudentModel"); }
}
// create a public property to use as the selected item from your models "std" collection
private GetStudents_Result _selectedResult;
public GetStudents_Result SelectedResult
{
get { return _selectedResult; }
set { _selectedResult = value; NotifyPropertyChanged("SelectedResult"); }
}
private void button2_Click(object sender, RoutedEventArgs e)
{
// if you want to remove an item you just have to remove it from
// the model, the INotifyPropertyChanged interface will notify the UI
// to update, no need to call Refresh, same works for Add etc
StudentModel.std.Remove(SelectedResult);
}
public event PropertyChangedEventHandler PropertyChanged;
public void NotifyPropertyChanged(string property)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(property));
}
}
}
<ListView ItemsSource="{Binding StudentModel.std}" SelectedItem="{Binding SelectedResult}" >
<TextBox Text="{Binding SelectedResult.Fname, UpdateSourceTrigger=PropertyChanged}" />
<TextBox Text="{Binding SelectedResult.Lname, UpdateSourceTrigger=PropertyChanged}" />
private void button2_Click(object sender, RoutedEventArgs e)
{
StudentModel.std.Remove(SelectedResult);
}
public partial class MainWindow : Window, INotifyPropertyChanged
{
public MainWindow()
{
InitializeComponent();
this.DataContext = this;
StudentModel = new students();
}
private students _studentModel;
public students StudentModel
{
get { return _studentModel; }
set { _studentModel = value; NotifyPropertyChanged("StudentModel"); }
}
private GetStudents_Result _selectedResult;
public GetStudents_Result SelectedResult
{
get { return _selectedResult; }
set { _selectedResult = value; NotifyPropertyChanged("SelectedResult"); }
}
private void button2_Click(object sender, RoutedEventArgs e)
{
StudentModel.std.Remove(SelectedResult);
}
public event PropertyChangedEventHandler PropertyChanged;
public void NotifyPropertyChanged(string property)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(property));
}
}
}
public class students
{
public students()
{
std = new ObservableCollection<GetStudents_Result>();
for (int i = 0; i < 100; i++)
{
std.Add(new GetStudents_Result { Fname = "FirstName" + i, Lname = "LasrName" + i });
}
}
public ObservableCollection<GetStudents_Result> std { get; set; }
}
public class GetStudents_Result : INotifyPropertyChanged
{
private string _fname;
private string _lname;
public string Fname
{
get { return _fname; }
set { _fname = value; NotifyPropertyChanged("Fname"); }
}
public string Lname
{
get { return _lname; }
set { _lname = value; NotifyPropertyChanged("Lname"); }
}
public event PropertyChangedEventHandler PropertyChanged;
public void NotifyPropertyChanged(string property)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(property));
}
}
}
<Canvas>
<TextBox Text="{Binding SelectedResult.Fname, UpdateSourceTrigger=PropertyChanged}" />
<TextBox Text="{Binding SelectedResult.Lname, UpdateSourceTrigger=PropertyChanged}" />
<Button Canvas.Left="90" Canvas.Top="65" Content="Remove" Click="button2_Click" Height="23" Name="button2" Width="75" />
<Button Canvas.Left="10" Canvas.Top="65" Content="Save" Height="23" Name="button1" Width="75" />
<ListView Name="listviewStudents" Canvas.Top="100" ItemsSource="{Binding StudentModel.std}" SelectedItem="{Binding SelectedResult}" >
<ListView.View>
<GridView>
<GridViewColumn Header="fname" DisplayMemberBinding="{Binding Path=Fname}"></GridViewColumn>
<GridViewColumn Header="lname" DisplayMemberBinding="{Binding Path=Lname}"></GridViewColumn>
</GridView>
</ListView.View>
</ListView>
</Canvas>