WPF后台代码实现数据绑定和布局

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mb5fdcad0be2e90 2013-01-22 21:47:00

在做WPF项目的时候我们往往需要把前台代码写在后台，这样控制更灵活，减少代码量。下面一个列子展示了后台实现绑定，数据转换Convert,Grid布局后台写法。

下面直接贴代码

（一）前台代码

<Window x:Class="BindingDemo.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:BindingDemo"
        Title="MainWindow" Height="350" Width="525">
    <Window.Resources>
        <local:NaNConvertDash x:Key="nanConvert"/>
    </Window.Resources>
    <Grid x:Name="grid" Height="60">
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto"> </ColumnDefinition>
            <ColumnDefinition Width="Auto"></ColumnDefinition>
        </Grid.ColumnDefinitions>
    </Grid>
</Window>

（二）后台代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Controls.Primitives;

namespace BindingDemo
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        string str = string.Empty;
        string stringF4 = "{0:F4}";    
        public MainWindow()
        {
            InitializeComponent();
            UniformGrid gridTitle = new UniformGrid();
            gridTitle.Width = 100;
            gridTitle.Columns = 1;
            TextBox tbxTitleChinese = new TextBox();
            tbxTitleChinese.Text = "语文";
            gridTitle.Children.Add(tbxTitleChinese);
            TextBox tbxTitleEnglish = new TextBox();
            tbxTitleEnglish.Text = "英语";
            gridTitle.Children.Add(tbxTitleEnglish);
            TextBox tbxTitleMath = new TextBox();
            tbxTitleMath.Text = "数学";
            gridTitle.Children.Add(tbxTitleMath);
            gridTitle.SetValue(Grid.RowProperty, 0);
            gridTitle.SetValue(Grid.ColumnProperty, 0);
            grid.Children.Add(gridTitle);

            UniformGrid gridNow = new UniformGrid();
            gridNow.Width = 100;
            gridNow.Columns = 1;
            //语文
            TextBox tbxChinese = new TextBox();
            Binding bindChinese = new Binding("Chinese");
            bindChinese.StringFormat = stringF4;
            bindChinese.Converter = FindResource("nanConvert") as IValueConverter;
            tbxChinese.SetBinding(TextBox.TextProperty, bindChinese);
            gridNow.Children.Add(tbxChinese);
            //英语
            TextBox tbxEnglish = new TextBox();
            Binding bindEnglish = new Binding("English");
            bindEnglish.StringFormat = stringF4;
            bindEnglish.Converter = FindResource("nanConvert") as IValueConverter;
            tbxEnglish.SetBinding(TextBox.TextProperty, bindEnglish);
            gridNow.Children.Add(tbxEnglish);
            //数学
            TextBox tbxMath = new TextBox();
            Binding bindMath = new Binding("Math");
            bindMath.StringFormat = stringF4;
            bindMath.Converter = FindResource("nanConvert") as IValueConverter;
            tbxMath.SetBinding(TextBox.TextProperty, bindMath);
            gridNow.Children.Add(tbxMath);
            gridNow.SetValue(Grid.RowProperty, 0);
            gridNow.SetValue(Grid.ColumnProperty, 1);
            grid.Children.Add(gridNow);
            DataModel data=new DataModel();
            data.Chinese = 18f;
            data.Math = float.NaN;
            data.English = 96.8f;
            gridNow.DataContext = data;            
        }
    }
    public class DataModel
    {
        public float Chinese { get; set; }
        public float Math { get; set; }
        public float English { get; set; }
    }
    class NaNConvertDash : IValueConverter
    {
        public object Convert(object value, System.Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            try
            {
                float data = (float)value;
                if (float.IsNaN(data))
                    return "-";
                else
                    return data;
            }
            catch
            {
                return "-";
            }
        }
        public object ConvertBack(object value, System.Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            throw new System.NotImplementedException();
        }
    }
}