WPF DataGrid ListView等控件Binding LINQ数据源

Binding及与之配套的数据转换和校验是WPF的核心。一些详细的只是介绍，园子里到处都是，这里DebugLZQ不再赘述。

首先回顾下WPF常用的Binding数据源

1.控件属性---控件的属性与属性Binding

经典的例子如下：

<TextBox Height="23" HorizontalAlignment="Left" Margin="28,42,0,0" Name="textBox1" VerticalAlignment="Top" Width="120" Text="{Binding Path=Value,ElementName=slider1,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"/><Slider Height="23" HorizontalAlignment="Left" Margin="28,94,0,0" Name="slider1" VerticalAlignment="Top" Width="225" />

重点是这里：

Text="{Binding Path=Value,ElementName=slider1,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"

2.Object数据源

控件的属性与一个内存Object绑定，该对象所在类实现IPropertyChanged接口

using System.ComponentModel;//

namespace Binding
{class Machine:INotifyPropertyChanged{#region INotifyPropertyChanged 成员public event PropertyChangedEventHandler PropertyChanged;#endregionprivate int temperature;public int Temperature{get { return temperature; }set {temperature = value;//引发事件if (PropertyChanged != null){PropertyChanged.Invoke(this, new PropertyChangedEventArgs("temperature"));}}}}
}

页面布局如下：

using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;namespace Binding
{/// <summary>/// Window2.xaml 的交互逻辑/// </summary>public partial class Window2 : Window{Machine machine;public Window2(){InitializeComponent();//数据源machine = new Machine();//BindingSystem.Windows.Data.Binding binding = new System.Windows.Data.Binding();binding.Source = machine;binding.Path = new PropertyPath("Temperature");//
            BindingOperations.SetBinding(textBox1, TextBox.TextProperty, binding);}private void button1_Click(object sender, RoutedEventArgs e){System.Timers.Timer timer = new System.Timers.Timer();timer.Interval = 500;timer.Enabled = true;timer.Elapsed += new System.Timers.ElapsedEventHandler(timer_Elapsed);}void timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e){machine.Temperature++;}}
}

3.XML数据源

不去多说，前面的博文中有类似的

4.ADO.NET中的DataTable

即从数据库获得一个DataTable对象， Binding到DataGrid或ListView。

自定义数据库表定义如下：

//----------直接DataTable数据源-------------------------------------
DataTable dataTable = SQLHelper.GetDataTable();
dataGrid1.ItemsSource = dataTable.DefaultView;

SQLHelper类如下，该静态类之定义了一个方法用来获得一个DataTable，下面的LINQ数据源使用相同的SQLHelper.GetDataTable()方法。

using System.Data.SqlClient;
using System.Data;namespace Binding
{class SQLHelper{public static string connstring = @"Data Source=.\SQLEXPRESS;AttachDbFilename=E:\VS2010Pros\Binding\Binding\Database1.mdf;Integrated Security=True;User Instance=True";public static DataTable GetDataTable(){using (SqlConnection conn = new SqlConnection(connstring)){string sql = @"select Id,Name,Age from tb_Student";SqlDataAdapter sda = new SqlDataAdapter(sql, conn);DataTable dt = new DataTable();                sda.Fill(dt);return dt;}}}
}

在xaml中加入Binding，DataGrid控件定义如下：

<DataGrid AutoGenerateColumns="False" Height="130" HorizontalAlignment="Left" Margin="24,16,0,0" Name="dataGrid1" VerticalAlignment="Top" Width="230" ><DataGrid.Columns><DataGridTextColumn Header="Id" Width="60" Binding="{Binding Id}"/><DataGridTextColumn Header="Name" Width="100" Binding="{Binding Name}"/><DataGridTextColumn Header="Age" Width="60" Binding="{Binding Age}"/></DataGrid.Columns></DataGrid>

结果如下(因为DebugLZQ现在开启的是XP系统，所以界面有点丑)：

5.LINQ 数据源 DataGrid ListView等控件Binding LINQ数据源

主要是LINQ to DataSet 和LINQ to SQL。

首先是LINQ to DataSet Binding到ListView。其中的dataTable获取方法和上面的一样。

            //----------Linq to DataSet数据源----------------------------------------var query = from row in dataTable.Rows.Cast<DataRow>()where Convert.ToString(row["Name"]).StartsWith("D")select new{Id=int.Parse(row["Id"].ToString()),Name=row["Name"].ToString(),Age = int.Parse(row["Age"].ToString())};listView1.ItemsSource = query;

ListView 定义及Binding如下：

        <ListView Height="100" HorizontalAlignment="Left" Margin="24,173,0,0" Name="listView1" VerticalAlignment="Top" Width="224" ><ListView.View><GridView><GridViewColumn Header="Id" Width="60" DisplayMemberBinding="{Binding Id}"/><GridViewColumn Header="Name" Width="100" DisplayMemberBinding="{Binding Name}"/><GridViewColumn Header="Age" Width="60" DisplayMemberBinding="{Binding Age}"/></GridView></ListView.View></ListView>

结果如下：

下面给是LINQ to SQL 数据源Binding到DataGrid控件。

用来映射tb_Student表的Student类定义如下：

using System.Data.Linq.Mapping;namespace Binding
{[Table(Name="tb_Student")]class Student{[Column(IsPrimaryKey = true, DbType = "Int NOT NULL IDENTITY", IsDbGenerated = true, Name = "Id")]public int Id { get; set; }[Column(DbType = "nvarchar(20)", Name = "Name")]public string Name { get; set; }[Column(DbType = "int", Name = "Age")]public int Age { get; set; }}
}

对数据源的LINQ操作如下,随便写了一个:

//---------Linq to SQL 数据源------------------------------------
System.Data.Linq.DataContext dc = new System.Data.Linq.DataContext(SQLHelper.connstring );var students= dc.GetTable<Student>();var query_2 = from s in studentswhere s.Name.Contains("D")select s;dataGrid2.ItemsSource = query_2;

DataGrid 定义及Binding如下：

<DataGrid AlternatingRowBackground="#FFAACC0B" AutoGenerateColumns="False" Height="130" HorizontalAlignment="Left" Margin="267,74,0,0" Name="dataGrid2" VerticalAlignment="Top" Width="230"><DataGrid.Columns><DataGridTextColumn Binding="{Binding Id}" Header="Id" Width="60"   /><DataGridTextColumn Binding="{Binding Name}" Header="Name" Width="100" /><DataGridTextColumn Binding="{Binding Age}" Header="Age" Width="60"  /></DataGrid.Columns></DataGrid>

程序运行结果如下：

转载于:https://www.cnblogs.com/DebugLZQ/archive/2012/11/27/2789027.html