WPF 绑定各种数据源之Datatable

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

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<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：　

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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

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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

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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：

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：

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<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：

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listView2.DataContext = GetDataTable().DefaultView;

　　效果图：

 

3、如果数据源已经是DataTable，则使用LINQ检索结果的形式为:

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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: