wpf 学习篇 之 combobox

今天,做奥运会专题保障系统的时候,用到了combobox ,因此,在这个地方记录下一些使用方法.
并且，在之过程中，也使用了一些linq的知识...

以下是晚上回家自己写的,已经经过测试...

<Grid>
        <ComboBox Height="23" HorizontalAlignment="Left" Margin="0,11,0,0" Name="comboBox1" VerticalAlignment="Top" Width="120" ItemsSource="{Binding}" SelectedIndex="0">
            <ComboBox.ItemTemplate>
                <DataTemplate>
                    <TextBlock Text="{Binding Path=Key}">
                       
                    </TextBlock>
                </DataTemplate>
            </ComboBox.ItemTemplate>
        </ComboBox>
        <Button Height="23" Margin="151,11,0,0" Name="Btn_InitComboBox" VerticalAlignment="Top" HorizontalAlignment="Left" Width="101" Click="Btn_InitComboBox_Click">设置ComboBox
        </Button>
        <ComboBox Height="23" HorizontalAlignment="Left" Margin="0,94,0,0" Name="comboBox2" VerticalAlignment="Top" Width="120" ItemsSource="{Binding}" SelectedIndex="0" >
            <ComboBox.ItemTemplate>
                <DataTemplate>
                    <TextBlock Text="{Binding Path=Keys}"></TextBlock>
                </DataTemplate>
            </ComboBox.ItemTemplate>
        </ComboBox>
        <Button Height="23" HorizontalAlignment="Left" Margin="151,94,0,0" Name="button1" VerticalAlignment="Top" Width="101" Click="button1_Click">Button</Button>
        <Label Height="28" HorizontalAlignment="Right" Margin="0,11,122,0" Name="label1" VerticalAlignment="Top" Width="120">从IDictionary绑定</Label>
        <Label Height="28" HorizontalAlignment="Right" Margin="0,94,132,0" Name="label2" VerticalAlignment="Top" Width="120">匿名对象以及ArrayList</Label>
        <ComboBox Height="23" HorizontalAlignment="Left" Margin="0,0,0,117" Name="comboBox3" VerticalAlignment="Bottom" Width="120" ItemsSource="{Binding}" >
            <ComboBox.ItemTemplate>
                <DataTemplate>
                    <TextBlock Text="{Binding Path=column1}"></TextBlock>
                </DataTemplate>
            </ComboBox.ItemTemplate>
        </ComboBox>
        <Button Height="23" HorizontalAlignment="Left" Margin="151,0,0,117" Name="button2" VerticalAlignment="Bottom" Width="101" Click="button2_Click">Button</Button>
        <Label Height="28" HorizontalAlignment="Right" Margin="0,0,122,117" Name="label3" VerticalAlignment="Bottom" Width="120">Label</Label>
        <ComboBox Height="23" HorizontalAlignment="Left" Margin="0,0,0,51" Name="comboBox4" VerticalAlignment="Bottom" Width="120" ItemsSource="{Binding}">
            <ComboBox.ItemTemplate>
                <DataTemplate>
                    <TextBlock Text="{Binding Path=column11}"></TextBlock>
                </DataTemplate>
            </ComboBox.ItemTemplate>
        </ComboBox>
        <Button Height="23" Margin="151,0,0,51" Name="button3" VerticalAlignment="Bottom" HorizontalAlignment="Left" Width="101" Click="button3_Click">Button</Button>
    </Grid>


后台代码:

   private void Btn_InitComboBox_Click(object sender, RoutedEventArgs e)
        {
            IDictionary<string, string> ComboxItems = new Dictionary<string, string>();

            for (int i = 0; i < 10; i++)
                ComboxItems.Add(i.ToString(), i.ToString());
            this.comboBox1.DataContext = ComboxItems;
        }

        private void button1_Click(object sender, RoutedEventArgs e)
        {
            ArrayList arrList = new ArrayList();
            for (int i = 0; i < 10; i++)
            {
                arrList.Add(new { Keys=i.ToString(),Values=(i+1).ToString()});
            }
            this.comboBox2.DataContext = arrList;
        }

        private void button2_Click(object sender, RoutedEventArgs e)
        {
            DataTable dt = new DataTable();
            DataColumn col1 = new DataColumn("column1");
            DataColumn col2 = new DataColumn("column2");

            dt.Columns.Add(col1);
            dt.Columns.Add(col2);

            for (int i = 0; i < 10; i++)
            {
                DataRow row = dt.NewRow();
                row[0] = i.ToString();
                row[1] = i.ToString();
                dt.Rows.Add(row);
            }

            this.comboBox3.DataContext = dt;
        }

        private void button3_Click(object sender, RoutedEventArgs e)
        {
            DataTable dt = new DataTable();
            DataColumn col1 = new DataColumn("column1");
            DataColumn col2 = new DataColumn("column2");

            dt.Columns.Add(col1);
            dt.Columns.Add(col2);

            for (int i = 0; i < 10; i++)
            {
                DataRow row = dt.NewRow();
                row[0] = i.ToString();
                row[1] = i.ToString();
                dt.Rows.Add(row);
            }

            IEnumerable temp = from row in dt.AsEnumerable()
                       where row.Field<string >("column1")!="1"
                       select new { column11 = row.Field<string>("column1"), column22 = row.Field<string>("column2") };
            this.comboBox4.DataContext = temp;
        }

没什么好讲的,看代码就明白了...

以后有空,再把前台的绑定全部改成后台程序实现....

add by yanchanggang 2008-05-23 00:51:00
后台程序实现绑定以及模板选择...

    DataTable dt = new DataTable();
            DataColumn col1 = new DataColumn("column1");
            DataColumn col2 = new DataColumn("column2");

            dt.Columns.Add(col1);
            dt.Columns.Add(col2);

            for (int i = 0; i < 10; i++)
            {
                DataRow row = dt.NewRow();
                row[0] = i.ToString();
                row[1] = i.ToString();
                dt.Rows.Add(row);
            }

            IEnumerable temp = from row in dt.AsEnumerable()
                               where row.Field<string>("column1") != "1"
                               select new { column11 = row.Field<string>("column1"), column22 = row.Field<string>("column2") };
           
            DataTemplate dataTemplate = new DataTemplate();
            FrameworkElementFactory frameworkElementFactory = new FrameworkElementFactory(typeof(Label));//创建一个控件模板
            Binding binding = new Binding();
            binding.Path = new PropertyPath("column11");//绑定到哪个字段
            frameworkElementFactory.SetBinding(ContentProperty, binding);//设置绑定到控件的哪个属性...
            dataTemplate.VisualTree = frameworkElementFactory;
            this.comboBox5.ItemTemplate = dataTemplate;
            this.comboBox5.ItemsSource = temp;

前台:
 <ComboBox Height="23" HorizontalAlignment="Left" Margin="0,0,0,59" Name="comboBox5" VerticalAlignment="Bottom" Width="120"  />