WPF 绑定各种数据源之Datatable

时间:2022-12-09 17:51:12

一、Binding是WPF的核心,WPF的数据源有以下几种:

  1、ADO.NET中的DataTable

  2、xml数据源

  3、object数据源

  4、元素控件属性

     

二、WPF绑定各种数据源索引

WPF 绑定各种数据源之Datatable

WPF绑定各种数据源之object数据源

WPF绑定各种数据源之xml数据源

WPF绑定各种数据源之元素控件属性

WPF 绑定基础

三、这里做一些简单的实例。

1.ListBox绑定Datatable数据源

前台代码

    <ListBox Margin="12,32,12,329" ItemsSource="{Binding}" Name="listBox1">
            <ListBox.ItemTemplate>
                <DataTemplate>           
                    <Grid>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="0.5*"/>
                            <ColumnDefinition Width="0.5*"/>
                            <ColumnDefinition Width="0.5*"/>
                        </Grid.ColumnDefinitions>  
                        <TextBlock Text="{Binding Path=ID}"/>
                        <TextBlock  Text="{Binding Path=Name}"/>
                        <TextBlock Grid.Column="1" Text="{Binding Path=Age}" Background="{Binding Path=Age, Converter={StaticResource BackgroundConverter}}"/>
                    </Grid>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>

后台代码: 

       public Window1()
        {
            InitializeComponent();
            listBox1.DataContext = GetDataTable();
            //使用ItemsSource的形式
         //listBox1.ItemsSource = GetDataTable().DefaultView;
            listBox1.SelectedIndex = 0;

        }

  下面是创建DataTable数据源,当然也可以连接数据库获得数据源

    private DataTable  GetDataTable()
        {
            DataTable data = new DataTable("MyDataTable");
            
            DataColumn ID = new DataColumn("ID");//第一列
            ID.DataType = System.Type.GetType("System.Int32");
            //ID.AutoIncrement = true; //自动递增ID号 
            data.Columns.Add(ID);

            //设置主键
            DataColumn[] keys = new DataColumn[1];
            keys[0] = ID;
            data.PrimaryKey = keys;

            data.Columns.Add(new DataColumn("Name",typeof(string)));//第二列
            data.Columns.Add(new DataColumn("Age",typeof(string)));//第三列

            data.Rows.Add(1,"  XiaoM","  20");
            data.Rows.Add(2,"  XiaoF","  122");
            data.Rows.Add(3,"  XiaoA", "  29");
            data.Rows.Add(4,"  XiaoB", "  102");
            return data;
        }

  下面是类型转换

    public class BackgroundConverter : IValueConverter
    {
        #region IValueConverter Members

        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            Color color = new Color();
            int num = int.Parse(value.ToString());
            if (num > 100)
                color = Colors.Yellow;
            else if (num < 50)
                color = Colors.LightGreen;
            else
                color = Colors.LightPink;
            return new SolidColorBrush(color);
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            throw new NotImplementedException();
        }

        #endregion
    }

  

 效果图:

WPF 绑定各种数据源之Datatable

2、使用ListView的形式绑定DataTable数据源,数据源与第一个是一样的,不同的地方是:

前台代码:

  <ListView Height="262" Margin="-12,0,12,39" VerticalAlignment="Bottom" ItemsSource="{Binding}" Name="listView2" HorizontalAlignment="Center">
            <ListView.View>
                <GridView>
                    <GridViewColumn Header="编号" DisplayMemberBinding="{Binding Path=ID}"  Width="100" />
                    <GridViewColumn Header="姓名" DisplayMemberBinding="{Binding Path=Name}" Width="100"/>
                    <GridViewColumn Header="年龄" Width="100">
                        <GridViewColumn.CellTemplate>
                            <DataTemplate>
                                <TextBlock Grid.Column="1" Text="{Binding Path=Age}" Foreground="{Binding Path=Age, Converter={StaticResource BackgroundConverter}}"/>
                            </DataTemplate>
                        </GridViewColumn.CellTemplate>
                    </GridViewColumn> 
               </GridView>
            </ListView.View>
        </ListView>

  

  后台代码:

  listView2.DataContext = GetDataTable().DefaultView;

  效果图:

WPF 绑定各种数据源之Datatable

 

3、如果数据源已经是DataTable,则使用LINQ检索结果的形式为:

            DataTable dt = GetDataTable();
            listView2.ItemsSource =
                from row in dt.Rows.Cast<DataRow>()
                where Convert.ToString(row["Name"]).StartsWith("XiaoF")
                select new Student()
                {
                    ID = int.Parse(row["ID"].ToString()),
                    Name = row["Name"].ToString(),
                    Age = row["Age"].ToString()
                };

其它不变.上面的代码是检索Name以XiaoF开始的数据,只有一条数据。 效果图如下:

WPF 绑定各种数据源之Datatable