3

我对 wpf 很陌生，所以也许我在这里遗漏了一些明显的东西。我在 stackoverflow 中发现了一个类似的问题，并尝试了解决方案（在下面给出的代码中实现）但无法让它工作。链接在这里。让我解释一下这个问题。我正在使用框架 2010。

我有一个包含 1 个数据网格和 3 个按钮的用户控件。相同的xaml如下。

<UserControl x:Class="RadarControls.RadarDataGrid"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
         xmlns:diagnostics="clr-namespace:System.Diagnostics;assembly=WindowsBase"
         xmlns:local="clr-namespace:RadarControls"
         mc:Ignorable="d" 
         d:DesignHeight="300" d:DesignWidth="300">
<Grid>
    <Grid.ColumnDefinitions>
        <ColumnDefinition />
        <ColumnDefinition />
        <ColumnDefinition />
    </Grid.ColumnDefinitions>
    <Grid.RowDefinitions>
        <RowDefinition />
        <RowDefinition Height="25" />
    </Grid.RowDefinitions>

    <DataGrid Name="myGrid" Grid.ColumnSpan="3" ItemsSource="{Binding}" AutoGenerateColumns="True"></DataGrid>

    <Button Content="Add" Grid.Row="1" Height="23" Margin="0,2,2,0" HorizontalAlignment="Left" Name="btnAdd" Width="100" />
    <Button Content="Delete" Grid.Column="1" Grid.Row="1" Margin="0,2,2,0" Height="23" HorizontalAlignment="Left" Name="btnDelete" Width="100" />
    <Button Content="Save" Grid.Column="2" Grid.Row="1" Height="23" Margin="0,2,0,0" HorizontalAlignment="Left" Name="btnSave" Width="100" />
</Grid>
</UserControl>

我正在使用此用户控件的窗口的 xaml 如下

<Window x:Class="RadarStudio.Users"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:ctrls="clr-namespace:RadarControls;assembly=RadarControls"
    xmlns:vm='clr-namespace:RadarViewModel.Users;assembly=RadarViewModel'
    Title="Users" Height="300" Width="300">
<Grid >
    <ctrls:RadarDataGrid Name="grid1" DataContext="{Binding str}"></ctrls:RadarDataGrid>
</Grid>

我后面的窗口代码如下

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
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.Shapes;
using System.Collections.ObjectModel;

namespace RadarStudio
{
    /// <summary>
    /// Interaction logic for Users.xaml
    /// </summary>
    public partial class Users : Window
    {
        public Users()
        {
            InitializeComponent();
            //this.DataContext = this;

            str.Add("dhaval");
            str.Add("ravinder");
        }

        public ObservableCollection<string> str = new ObservableCollection<string>();
    }
}

我尝试了很多东西，但我无法在我的网格上找到字符串。

请帮忙！提前致谢！

问候，

萨马尔

4

5 回答 5

2

您只能绑定到公共属性！str作为财产。

来自MSDN：The properties you use as binding source properties for a binding must be public properties of your class. Explicitly defined interface properties cannot be accessed for binding purposes, nor can protected, private, internal, or virtual properties that have no base implementation.

You cannot bind to public fields.

于 2012-08-17T15:04:24.007 回答
0

正如 Zabavsky 提到的，WPF 绑定适用于对象的属性，但不适用于字段。

尝试将 str 更改为属性：

public partial class Users : Window
{
    public Users()
    {
        InitializeComponent();
        this.DataContext = this;

        str = = new ObservableCollection<string>();
        str.Add("dhaval");
        str.Add("ravinder");
    }

    public ObservableCollection<string> str { get; set; }

}
于 2012-08-21T06:55:59.563 回答
0

试试这个.....

我刚刚检查了您的示例数据，它运行良好，我没有进一步测试。

仔细检查......

我刚刚修改了您的代码，并在下面发布。

<UserControl x:Class="RadarControls.RadarDataGrid"
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
     xmlns:diagnostics="clr-namespace:System.Diagnostics;assembly=WindowsBase"
     mc:Ignorable="d" 
     d:DesignHeight="300" d:DesignWidth="300"  >
     <!--xmlns:local="clr-namespace:RadarControls"-->
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition />
            <ColumnDefinition />
            <ColumnDefinition />
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition />
            <RowDefinition Height="25" />
        </Grid.RowDefinitions>

        <DataGrid Name="myGrid" Grid.ColumnSpan="3"  AutoGenerateColumns="True"></DataGrid> //Data Grid Is Modified

        <Button Content="Add" Grid.Row="1" Height="23" Margin="0,2,2,0" HorizontalAlignment="Left" Name="btnAdd" Width="100" />
        <Button Content="Delete" Grid.Column="1" Grid.Row="1" Margin="0,2,2,0" Height="23" HorizontalAlignment="Left" Name="btnDelete" Width="100" />
        <Button Content="Save" Grid.Column="2" Grid.Row="1" Height="23" Margin="0,2,0,0" HorizontalAlignment="Left" Name="btnSave" Width="100" />
    </Grid>
</UserControl>

您应该在其中使用此用户控件的窗口的 xaml

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
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 RadarControls
{
    /// <summary>
    /// Interaction logic for RadarDataGrid.xaml
    /// </summary>
    public partial class RadarDataGrid : UserControl
    {
        public RadarDataGrid()
        {
            InitializeComponent();
        }

        public DataGrid RadarGrid//New Public Class is added
        {
            get { return myGrid; }
        }
    }
}

您应该使用此用户控件的窗口的 xaml

<Window x:Class="RadarStudio.Users"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Users" Height="300" Width="300">
    <Grid >
        <!--xmlns:ctrls="clr-namespace:RadarControls;assembly=RadarControls"
        xmlns:vm='clr-namespace:RadarViewModel.Users;assembly=RadarViewModel'-->
        <Grid Name="Dggrid"> </Grid>//New Grid is added as a place holder
    </Grid>
</Window>

后面的窗口代码如下

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
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.Shapes;
using System.Collections.ObjectModel;
using RadarControls;

namespace RadarStudio
{
    /// <summary>
    /// Interaction logic for Users.xaml
    /// </summary>
    public partial class Users : Window
    {
        RadarDataGrid rg = new RadarDataGrid();//Object of user control
        List<UserList> List = new List<UserList>();// It will be your item source
        UserList ListItem;
        public Users()
        {
            InitializeComponent();
            //this.DataContext = this;
            ListItem = new UserList();
            ListItem.UserName = "dhaval";//Adding First Item
            List.Add(ListItem);
            ListItem = new UserList();
            ListItem.UserName = "ravinder";//Adding Second
            List.Add(ListItem);
            rg.RadarGrid.ItemsSource = List;//Assigned Itemsource

            Dggrid.Children.Add(rg);
        }
    }

/*This Class is need to store user information, you can include users additional details 
(if needed) by creating corresponding Properties*/
    public class UserList
    {
        string userName;

        public string UserName
        {
            get { return userName; }
            set { userName = value; }
        }
    }
}
于 2012-08-22T06:58:14.560 回答
0

窗口没有Datacontext，当你绑定str时找不到。修改 xaml ：

<Window x:Class="RadarStudio.Users"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:ctrls="clr-namespace:RadarControls;assembly=RadarControls"
xmlns:vm='clr-namespace:RadarViewModel.Users;assembly=RadarViewModel'
Title="Users" Height="300" Width="300"
Name="root">

<Grid >
    <ctrls:RadarDataGrid Name="grid1" DataContext="{Binding Path=str, ElementName=root}"/>
</Grid> </Window>

并将 str 设置为属性

public partial class Users : Window
{
    public Users()
    {
        str = new ObservableCollection<string>();
        InitializeComponent();
        //this.DataContext = this;

        str.Add("dhaval");
        str.Add("ravinder");
    }

    public ObservableCollection<string> str { get; set; }
}
于 2012-08-24T09:33:10.560 回答
-1

这似乎是一个愚蠢的错误，但是当我在 InitializeComponent 调用之前初始化可观察集合时，它开始显示数据。

于 2012-08-21T07:51:32.673 回答