Warning: file_get_contents(/data/phpspider/zhask/data//catemap/4/wpf/14.json): failed to open stream: No such file or directory in /data/phpspider/zhask/libs/function.php on line 167

Warning: Invalid argument supplied for foreach() in /data/phpspider/zhask/libs/tag.function.php on line 1116

Notice: Undefined index: in /data/phpspider/zhask/libs/function.php on line 180

Warning: array_chunk() expects parameter 1 to be array, null given in /data/phpspider/zhask/libs/function.php on line 181
在c#wpf中,我可以动态地将listview列构建为类方法吗?_C#_Wpf_Listview_Dynamic - Fatal编程技术网

在c#wpf中,我可以动态地将listview列构建为类方法吗?

在c#wpf中,我可以动态地将listview列构建为类方法吗?,c#,wpf,listview,dynamic,C#,Wpf,Listview,Dynamic,我将使用listview显示数据列表,数据类包含以下元素: class MyData { static Random rnd = new Random(); public int id { get; set; } public string name { get; set; } public bool selected { get; set; } private LED[] LEDs = new LED[21]; private byte[] s

我将使用listview显示数据列表,数据类包含以下元素:

class MyData
{
    static Random rnd = new Random();
    public int id { get; set; }
    public string name { get; set; }
    public bool selected { get; set; }

    private LED[] LEDs = new LED[21];
    private byte[] servos = new byte[21];
}
并希望以如下表格格式显示数据:

{selected} {id} {name} {servo[1]} {servo[2]} ......
(伺服[0]应隐藏)

对于每列的布局:

- {selected] : checkbox
- {id} : right alignment
- {name] : left alignment
- {servo} : right alignment, with background based on LED setting
我已经构建了列表视图,如下所示

    <ListView x:Name="lvData" FontSize="13" Background="LightGoldenrodYellow" Margin="0,0,0,0" >
        <ListView.ItemContainerStyle>
            <Style TargetType="ListViewItem">
                <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
            </Style>
        </ListView.ItemContainerStyle>            
        <ListView.View>
            <GridView>

                <GridViewColumn >
                    <GridViewColumn.CellTemplate>
                        <DataTemplate>
                            <CheckBox IsChecked="{Binding selected}" Checked="Selection_Changed" Unchecked="Selection_Changed" />
                        </DataTemplate>
                    </GridViewColumn.CellTemplate>
                </GridViewColumn>
                <GridViewColumn Header="id" Width="60">
                    <GridViewColumn.CellTemplate>
                        <DataTemplate >
                            <TextBlock Text="{Binding id}" TextAlignment="Right" />
                        </DataTemplate>
                    </GridViewColumn.CellTemplate>
                </GridViewColumn>

                <GridViewColumn Header="name" Width="100" DisplayMemberBinding="{Binding name}"/>

                <GridViewColumn Header="s01" Width="35">
                    <GridViewColumn.CellTemplate>
                        <DataTemplate>
                            <Grid Background="{Binding Path=LED01}" Margin="-5,0,-5,0">
                                <Label Margin="0,0,0,0" Content="{Binding Path=S01}" HorizontalContentAlignment="Right"></Label>
                            </Grid>
                        </DataTemplate>
                    </GridViewColumn.CellTemplate>
                </GridViewColumn>

                <GridViewColumn Header="s02" Width="35">
                    <GridViewColumn.CellTemplate>
                        <DataTemplate>
                            <Grid Background="{Binding Path=LED02}" Margin="-5,0,-5,0">
                                <Label Margin="0,0,0,0" Content="{Binding Path=S01}" HorizontalContentAlignment="Right"></Label>
                            </Grid>
                        </DataTemplate>
                    </GridViewColumn.CellTemplate>
                </GridViewColumn>

                :
                {repeat for s03...s20}
                :

            </GridView>
        </ListView.View>
    </ListView>
两种方法GetLED和GetServo根据给定索引的阵列LED和Servo的值返回颜色和显示

我已经多次重复GridViewColumn块,并且创建了40个虚拟属性,因为它不能直接绑定到方法,这看起来真的很愚蠢

我可以知道是否有任何简单的方法来构建listview吗

实际上,数组的大小不是固定的,21只是最大大小

我想知道它是否可以动态构建列,以便可以根据实际大小创建列,并且这些重复的列可以在循环中完成。并基于类方法设置背景和数据内容,这样我就可以直接设置为GetLED(?)和GetServo(?),而无需为其构建虚拟属性


提前谢谢。

你的问题有点冗长和合乎逻辑。我试图实现您需要的功能

敬请关注以下事项:

型号

我将LED和伺服细节分为不同的类,并将该类的List对象分为MyData类

class MyData
{
    public int id { get; set; }
    public string name { get; set; }
    public bool selected { get; set; }
    public List<MySubData> lstSubData { get; set; }
}

class MySubData
{
    public string LED;
    public string Servo;
}
XAML

<Window x:Class="WPFTest.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:WPFTest"
        mc:Ignorable="d"
        Title="TestWPF" Height="300" Width="400" 
        WindowStyle="SingleBorderWindow" 
        WindowStartupLocation="CenterScreen">

    <Grid>
        <ListView x:Name="lvData" FontSize="13" Background="LightGoldenrodYellow" Margin="0,0,0,0" >

            <ListView.ItemContainerStyle>
                <Style TargetType="ListViewItem">
                    <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
                </Style>
            </ListView.ItemContainerStyle>
        </ListView>
    </Grid>
</Window>

代码隐藏

我应用的主要逻辑是代码隐藏(C#)。我生成ListView。仅在CS页面中查看。 此代码将为UI和数据生成动态GridView和DataTable

我采集了样本数据来模拟您的需求。您可以获取实际数据。我使用变量globalServo来定义列数的设置(正如您在注释中提到的)

public partial class MainWindow : Window
{
    public int globalServo = 21;

    public MainWindow()
    {
        InitializeComponent();

        List<MyData> lstMyData = new List<MyData>();

        for (int i = 1; i < 6; i++)
        {
            List<MySubData> lstMySubData = new List<MySubData>();

            for (int j = 0; j < globalServo; j++)
            {
                lstMySubData.Add(new MySubData() { LED = "LED" + j, Servo = "Servo" + j });
            }

            lstMyData.Add(new MyData()
            {
                id = i,
                name = "name-" + i,
                selected = Convert.ToBoolean(i % 2),
                lstSubData = lstMySubData
            });
        }

        lvData.View = GenerateGridView();
        lvData.ItemsSource = GenerateSource(lstMyData).DefaultView;
    }

    private GridView GenerateGridView()
    {
        GridView view = new GridView();

        view.Columns.Add(new GridViewColumn() { Header = "Id", DisplayMemberBinding = new Binding("Id") });
        view.Columns.Add(new GridViewColumn() { Header = "Name", DisplayMemberBinding = new Binding("Name") });
        view.Columns.Add(new GridViewColumn() { Header = "Selected", CellTemplate = GetCheckboxTemplate() });

        for (int i = 1; i <= globalServo; i++)
        {
            view.Columns.Add(new GridViewColumn() { Header = "Servo" + i, CellTemplate = GetTextBlockTemplate(i) });
        }

        return view;
    }

    private DataTable GenerateSource(List<MyData> dataList)
    {
        DataTable dt = new DataTable();
        dt.Columns.Add("Id");
        dt.Columns.Add("Name");
        dt.Columns.Add("Selected");

        for (int i = 1; i <= globalServo; i++)
        {
            dt.Columns.Add("Servo" + i);
        }

        foreach (var item in dataList)
        {
            DataRow row = dt.NewRow();
            row["Id"] = item.id;
            row["Name"] = item.name;
            row["Selected"] = item.selected;

            for (int i = 1; i <= globalServo; i++)
            {
                row["Servo" + i] = item.lstSubData[i - 1].Servo + "##" + item.lstSubData[i - 1].LED;
            }

            dt.Rows.Add(row);
        }

        return dt;
    }

    private DataTemplate GetCheckboxTemplate()
    {
        DataTemplate dt = new DataTemplate(typeof(CheckBox));
        FrameworkElementFactory chkElement = new FrameworkElementFactory(typeof(CheckBox));
        dt.VisualTree = chkElement;

        Binding bind = new Binding();
        bind.Path = new PropertyPath("Selected");
        chkElement.SetBinding(CheckBox.IsCheckedProperty, bind);

        return dt;
    }

    private DataTemplate GetTextBlockTemplate(int Index)
    {
        TextConverter textConverter = new TextConverter();
        ColorConverter colorConverter = new ColorConverter();

        DataTemplate dt = new DataTemplate(typeof(TextBlock));
        FrameworkElementFactory txtElement = new FrameworkElementFactory(typeof(TextBlock));
        dt.VisualTree = txtElement;

        Binding bind = new Binding();
        bind.Path = new PropertyPath("Servo" + Index);
        bind.Converter = textConverter;
        txtElement.SetBinding(TextBlock.TextProperty, bind);

        Binding bind1 = new Binding();
        bind1.Path = new PropertyPath("Servo" + Index);
        bind1.Converter = colorConverter;
        txtElement.SetBinding(TextBlock.BackgroundProperty, bind1);

        return dt;
    }

}
公共部分类主窗口:窗口
{
公共int globalServo=21;
公共主窗口()
{
初始化组件();
List lstMyData=新列表();
对于(int i=1;i<6;i++)
{
List lstMySubData=新列表();
对于(int j=0;j对于(int i=1;i LED和伺服的大小将始终相同,对吗?是的,它将为它们构建一个类,因此它将成为带有LED的伺服类数组。但在现有程序中,它们是两个数组。好的。我正在考虑解决方案。我想到了一种方法,但需要一些时间来告诉您。如果LED和伺服某些行的列为空?例如:对于id=1,有10个LED和伺服,但是对于id=2,有15个。然后在ListView中,对于id=1的行,5列将显示为空。我想最简单的方法可能是用代码而不是xaml构建这些列。非常感谢,我将尝试了解详细信息。并在测试后更新状态。@JamesMA检查一下,我还加了“注释”。让我知道。简而言之,我将所有内容都移到了代码后面。非常感谢您提供的示例,它在我的案例中似乎很有效。我尝试研究代码,因为我以前没有尝试从代码中构建listview,我想在这里澄清一些逻辑。似乎已经创建了一个数据表,其中包含GetLED值和GetServo值的动态列由“##”分隔。移到我的例子中,lstSubData中元素的内容变成GetServo(i)+“##”+GetLED(i)。以及转换器(TextConverter和ColorConverter)将处理这些动态列以从中提取文本和颜色。在这种情况下,每当数据更新时,它可能需要重建DataTable。不是吗?这是否意味着listview无法直接链接到方法,因此它必须创建具有最终值的元素?顺便说一句,我可以知道如何在代码中设置textalignment吗?我不能在FrameworkElementFactory中找到这样的属性。是的。您每次都必须重新生成DataTable。我认为,在您的情况下没有其他方法。
<Window x:Class="WPFTest.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:WPFTest"
        mc:Ignorable="d"
        Title="TestWPF" Height="300" Width="400" 
        WindowStyle="SingleBorderWindow" 
        WindowStartupLocation="CenterScreen">

    <Grid>
        <ListView x:Name="lvData" FontSize="13" Background="LightGoldenrodYellow" Margin="0,0,0,0" >

            <ListView.ItemContainerStyle>
                <Style TargetType="ListViewItem">
                    <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
                </Style>
            </ListView.ItemContainerStyle>
        </ListView>
    </Grid>
</Window>
public partial class MainWindow : Window
{
    public int globalServo = 21;

    public MainWindow()
    {
        InitializeComponent();

        List<MyData> lstMyData = new List<MyData>();

        for (int i = 1; i < 6; i++)
        {
            List<MySubData> lstMySubData = new List<MySubData>();

            for (int j = 0; j < globalServo; j++)
            {
                lstMySubData.Add(new MySubData() { LED = "LED" + j, Servo = "Servo" + j });
            }

            lstMyData.Add(new MyData()
            {
                id = i,
                name = "name-" + i,
                selected = Convert.ToBoolean(i % 2),
                lstSubData = lstMySubData
            });
        }

        lvData.View = GenerateGridView();
        lvData.ItemsSource = GenerateSource(lstMyData).DefaultView;
    }

    private GridView GenerateGridView()
    {
        GridView view = new GridView();

        view.Columns.Add(new GridViewColumn() { Header = "Id", DisplayMemberBinding = new Binding("Id") });
        view.Columns.Add(new GridViewColumn() { Header = "Name", DisplayMemberBinding = new Binding("Name") });
        view.Columns.Add(new GridViewColumn() { Header = "Selected", CellTemplate = GetCheckboxTemplate() });

        for (int i = 1; i <= globalServo; i++)
        {
            view.Columns.Add(new GridViewColumn() { Header = "Servo" + i, CellTemplate = GetTextBlockTemplate(i) });
        }

        return view;
    }

    private DataTable GenerateSource(List<MyData> dataList)
    {
        DataTable dt = new DataTable();
        dt.Columns.Add("Id");
        dt.Columns.Add("Name");
        dt.Columns.Add("Selected");

        for (int i = 1; i <= globalServo; i++)
        {
            dt.Columns.Add("Servo" + i);
        }

        foreach (var item in dataList)
        {
            DataRow row = dt.NewRow();
            row["Id"] = item.id;
            row["Name"] = item.name;
            row["Selected"] = item.selected;

            for (int i = 1; i <= globalServo; i++)
            {
                row["Servo" + i] = item.lstSubData[i - 1].Servo + "##" + item.lstSubData[i - 1].LED;
            }

            dt.Rows.Add(row);
        }

        return dt;
    }

    private DataTemplate GetCheckboxTemplate()
    {
        DataTemplate dt = new DataTemplate(typeof(CheckBox));
        FrameworkElementFactory chkElement = new FrameworkElementFactory(typeof(CheckBox));
        dt.VisualTree = chkElement;

        Binding bind = new Binding();
        bind.Path = new PropertyPath("Selected");
        chkElement.SetBinding(CheckBox.IsCheckedProperty, bind);

        return dt;
    }

    private DataTemplate GetTextBlockTemplate(int Index)
    {
        TextConverter textConverter = new TextConverter();
        ColorConverter colorConverter = new ColorConverter();

        DataTemplate dt = new DataTemplate(typeof(TextBlock));
        FrameworkElementFactory txtElement = new FrameworkElementFactory(typeof(TextBlock));
        dt.VisualTree = txtElement;

        Binding bind = new Binding();
        bind.Path = new PropertyPath("Servo" + Index);
        bind.Converter = textConverter;
        txtElement.SetBinding(TextBlock.TextProperty, bind);

        Binding bind1 = new Binding();
        bind1.Path = new PropertyPath("Servo" + Index);
        bind1.Converter = colorConverter;
        txtElement.SetBinding(TextBlock.BackgroundProperty, bind1);

        return dt;
    }

}