C# 使用visual studio 2012 C在WPF中使用DataGrid示例#

我的DataGrid包含一些项目。当我在DataGrid中选择项目时，它应该显示在我窗口中的3个文本框中。请帮助我使用.cs代码。我是WPF新手

这是我的XAML代码

<Window x:Class="simpledatagrid.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="IDDATA" Height="350" Width="525">
<Grid>
    <DataGrid  Name="dgsample" BorderBrush="Black" BorderThickness="2" AutoGenerateColumns="True" CanUserAddRows="True" CanUserDeleteRows="True"  Margin="200,10,10,75"/>

    <Label  Content="ID :" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" Height="26" Width="27"/>
    <Label  Content="Name :" HorizontalAlignment="Left" Margin="10,60,0,0" VerticalAlignment="Top" Height="26" Width="48"/>
    <Label  Content="Salary :" HorizontalAlignment="Left" Margin="10,110,0,0" VerticalAlignment="Top" Height="26" Width="47"/>

    <TextBox Name="tb1" HorizontalAlignment="Left" Height="20" Margin="60,10,0,0" TextWrapping="NoWrap" Text="" VerticalAlignment="Top" Width="100" />
    <TextBox Name="tb2" HorizontalAlignment="Left" Height="20" Margin="60,60,0,0" TextWrapping="NoWrap" Text="" VerticalAlignment="Top" Width="100"/>
    <TextBox Name="tb3" HorizontalAlignment="Left" Height="20" Margin="60,110,0,0" TextWrapping="NoWrap" Text="" VerticalAlignment="Top" Width="100"/>

    <Button Content="Get" HorizontalAlignment="Left" Margin="10,190,0,0" VerticalAlignment="Top" Width="75" Click="Get_Click" />
    <Button Content="Add" HorizontalAlignment="Left" Margin="10,230,0,0" VerticalAlignment="Top" Width="75" Click="Add_Click" />
    <Button Content="Delete" HorizontalAlignment="Left" Margin="10,270,0,0" VerticalAlignment="Top" Width="75" Click="Delete_Click" />
</Grid>

这是我的.cs代码

public partial class MainWindow : Window
{
    ObservableCollection<User> Users = new ObservableCollection<User>();
    public MainWindow()
    {
        InitializeComponent();
    Users.Add(new User() { Id = 101, Name = "Allen", Salary = 10 });
    Users.Add(new User() { Id = 102, Name = "king", Salary = 20 });
    Users.Add(new User() { Id = 103, Name = "scot", Salary = 30 });
    Users.Add(new User() { Id = 104, Name = "havy", Salary = 40 });
    Users.Add(new User() { Id = 105, Name = "xen", Salary = 50 });
    Users.Add(new User() { Id = 106, Name = "len", Salary = 60 });

    dgsample.ItemsSource = Users;
   }

private void Get_Click(object sender, RoutedEventArgs e)
{            
    {

        User currentUser = Users.Single(select => select.Id == int.Parse(this.tb1.Text));
        this.tb2.Text = currentUser.Name;
        this.tb3.Text = currentUser.Salary.ToString();

    }
 }

private void Add_Click(object sender, RoutedEventArgs e)
{
    Users.Add(new User() { Id = int.Parse(tb1.Text), Name = tb2.Text, Salary = int.Parse(tb3.Text) });
}
 private void Delete_Click(object sender, RoutedEventArgs e)
{
    Users.RemoveAt(dgsample.SelectedIndex);                       
}
}

公共部分类主窗口：窗口
{
ObservableCollection用户=新的ObservableCollection（）；
公共主窗口（）
{
初始化组件（）；
添加（新用户（）{Id=101，Name=“Allen”，Salary=10}）；
添加（新用户（）{Id=102，Name=“king”，Salary=20}）；
添加（新用户（）{Id=103，Name=“scot”，Salary=30}）；
添加（新用户（）{Id=104，Name=“havy”，Salary=40}）；
添加（新用户（）{Id=105，Name=“xen”，Salary=50}）；
添加（新用户（）{Id=106，Name=“len”，Salary=60}）；
dgsample.ItemsSource=用户；
}
私有void Get_Click（对象发送方，路由目标）
{            
{
User currentUser=Users.Single（select=>select.Id==int.Parse（this.tb1.Text））；
this.tb2.Text=currentUser.Name；
this.tb3.Text=currentUser.Salary.ToString（）；
}
}
私有无效添加\单击（对象发送者，路由目标）
{
Add（newuser（）{Id=int.Parse（tb1.Text），Name=tb2.Text，Salary=int.Parse（tb3.Text）}）；
}
私有无效删除\单击（对象发送者，路由目标）
{
Users.removet（dgsample.SelectedIndex）；
}
}

您可以进行以下绑定：

<TextBox Text="{Binding SelectedItem.Name, ElementName=dgsample}"/>

---

和eny属性的模拟：Id、薪水。

您可以进行以下绑定：

<TextBox Text="{Binding SelectedItem.Name, ElementName=dgsample}"/>

---

和eny属性的模拟：Id、薪水。

初始化组件后，在构造函数中将SelectionChanged事件添加到datagrid中：

dgsample.SelectionChanged += Grid_SelectionChanged;

并添加以下代码：

private void Grid_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    int index = dgsample.SelectedIndex;

    tb1.Text = users[index].Id.ToString();
    tb2.Text = users[index].Name;
    tb3.Text = users[index].Salary.ToString();
}

*更新*我知道这与问题无关，但作者向我要的

以下是您的添加方法：

private void BtnAdd_Click(object sender, RoutedEventArgs e)
{

    if (!tb1.Text.Equals("")) //checks if tb1 is not empy
    {
        var query1 = users.Where(User => User.Id == int.Parse(tb1.Text)); //creates a variable query1 with all users who have same ID as the one in tb1, I do this to block the same ID insertion

        if (!query1.Any()) //if the query1 is empty, meaning there are no users with given id
        {
            users.Add(new User() { Id = int.Parse(tb1.Text), Name = tb2.Text, Salary = int.Parse(tb3.Text) }); // adds new user to the list
        }
    }

}

---

初始化组件后，将SelectionChanged事件添加到构造函数中的datagrid中：

dgsample.SelectionChanged += Grid_SelectionChanged;

并添加以下代码：

private void Grid_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    int index = dgsample.SelectedIndex;

    tb1.Text = users[index].Id.ToString();
    tb2.Text = users[index].Name;
    tb3.Text = users[index].Salary.ToString();
}

*更新*我知道这与问题无关，但作者向我要的

以下是您的添加方法：

private void BtnAdd_Click(object sender, RoutedEventArgs e)
{

    if (!tb1.Text.Equals("")) //checks if tb1 is not empy
    {
        var query1 = users.Where(User => User.Id == int.Parse(tb1.Text)); //creates a variable query1 with all users who have same ID as the one in tb1, I do this to block the same ID insertion

        if (!query1.Any()) //if the query1 is empty, meaning there are no users with given id
        {
            users.Add(new User() { Id = int.Parse(tb1.Text), Name = tb2.Text, Salary = int.Parse(tb3.Text) }); // adds new user to the list
        }
    }

}

---

更容易做到这一点

    <TextBox **Text="{Binding SelectedItem.Id, ElementName=dgsample}"** Name="tb1" HorizontalAlignment="Left" Height="20" Margin="60,10,0,0" TextWrapping="NoWrap"  VerticalAlignment="Top" Width="100" />
    <TextBox **Text="{Binding SelectedItem.Name, ElementName=dgsample}"**  Name="tb2" HorizontalAlignment="Left" Height="20" Margin="60,60,0,0" TextWrapping="NoWrap"  VerticalAlignment="Top" Width="100"/>
    <TextBox  **Text="{Binding SelectedItem.Salary, ElementName=dgsample}"**  Name="tb3"          HorizontalAlignment="Left" Height="20" Margin="60,110,0,0" TextWrapping="NoWrap"  VerticalAlignment="Top" Width="100"/>

---

更简单的方法

    <TextBox **Text="{Binding SelectedItem.Id, ElementName=dgsample}"** Name="tb1" HorizontalAlignment="Left" Height="20" Margin="60,10,0,0" TextWrapping="NoWrap"  VerticalAlignment="Top" Width="100" />
    <TextBox **Text="{Binding SelectedItem.Name, ElementName=dgsample}"**  Name="tb2" HorizontalAlignment="Left" Height="20" Margin="60,60,0,0" TextWrapping="NoWrap"  VerticalAlignment="Top" Width="100"/>
    <TextBox  **Text="{Binding SelectedItem.Salary, ElementName=dgsample}"**  Name="tb3"          HorizontalAlignment="Left" Height="20" Margin="60,110,0,0" TextWrapping="NoWrap"  VerticalAlignment="Top" Width="100"/>

我认为最好使用bindings@user2889489当然，我已经有了答案，但无法将其放在评论中：/@2889489在我的答案中添加了评论。我认为更好地使用它bindings@user2889489当然，我已经为您提供了答案，但无法将其放在评论中：/@2889489在我的答案中添加了评论。