在DataGrid中能否控制数据绑定的显示方式

Question

比如我有一个DateTime类型的字段 绑定到DataGrid的一列上 如果自己控制绑定以后的显示方式

Code Snippet

<my:DataGridCheckBoxColumn Header="男" DisplayMemberBinding="{Binding BirthDay}"/>

 

 

有什么办法能让绑定显示的是BirthDay.ToShortDateString()呢？

Answer 1

用Convert,去转换:大概像这样

Code Snippet

    public class UserConverter : IValueConverter
    {

        #region IValueConverter Members

        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            string sex_str = (string)value;

            if (sex_str == null || "".Equals(sex_str.Trim()))
            {
                return "male";
            }

            if ("男".Equals(sex_str.Trim()))
            {
               return sex_str = "male";
            }
            else
            {
              return  sex_str = "famale";
            }
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            return null;
        }

        #endregion
    }// end for class ,Converter

 

以下为全部源码

Code Snippet

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Data;

namespace ConvertValue
{
    public partial class Page : UserControl
    {
        public Page()
        {
            InitializeComponent();
            List<User> userList = new List<User>();
          
            userList.Add(new User("c1","21","男"));
            userList.Add(new User("c2", "26", "女"));
            userList.Add(new User("c3", "31", "男"));
            userList.Add(new User("c4", "21", "女"));
            userList.Add(new User("c5", "11", "男"));
            userList.Add(new User("c6", "27", "男"));
            this.lstUser.DataContext = userList;
        }
    }
    public class User
    {
        #region
        public User()
        {

        }
        public User(string userName, string age, string sex)
        {
            this.UserName = userName;
            this.Age = age;
            this.Sex = sex;
        }
        public string UserName { get; set; }
        public string Age { get; set; }
        public string Sex { get; set; }

        #endregion
    }// end for class ,this is User

    public class UserConverter : IValueConverter
    {

        #region IValueConverter Members

        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            string sex_str = (string)value;

            if (sex_str == null || "".Equals(sex_str.Trim()))
            {
                return "male";
            }

            if ("男".Equals(sex_str.Trim()))
            {
               return sex_str = "male";
            }
            else
            {
              return  sex_str = "famale";
            }
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            return null;
        }

        #endregion
    }// end for class ,Converter
}

 

<UserControl x:Class="ConvertValue.Page"
    xmlns="http://schemas.microsoft.com/client/2007"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Width="400" Height="300" xmlns:cx="clr-namespace:ConvertValue">
    <Grid x:Name="LayoutRoot" Background="White">
        <Grid.Resources>
            <cx:UserConverter x:Key="userConverter"/>
        </Grid.Resources>
            <ListBox x:Name="lstUser" ItemsSource="{Binding}" Height="150">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <StackPanel Orientation="Vertical">
                        <StackPanel Orientation="Horizontal">
                        <TextBlock Text="{Binding UserName}"/>
                        <TextBlock Text="{Binding Age}"/>
                        </StackPanel>
                        <TextBlock Text="{Binding Sex,Converter={StaticResource userConverter}}"/>
                       
                       
                    </StackPanel>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>
       
    </Grid>
</UserControl>

如果你需要把日期以一定日期格式来显示,那你就 用一个Converter去把你的日期转换过来!
加油!呵呵!
现在我在上班,你自己先想想,中午休息的时候我再给你写一个.

Answer 2

这办法不错额 我试了下可以的 看来还是得多看看silverlight的帮助文档 虽然英文让人头疼 呵呵

顺便问一下 如果这个实现了IValueConverter的类改成定义在User类中 例如

Code Snippet

public class User

{

public class UserConverter:IValueConverter

{

 

}

}

 

 

 

这样的话在static resouce中能否引用？

我写了

<UserControl xmlns:my="clr-namespaceystem.Windows.Controls;assembly=System.Windows.Controls.Data"  x:Class="TestDataGrid.Page"
    xmlns="http://schemas.microsoft.com/client/2007"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:TestDataGrid="clr-namespace:TestDataGrid"
    Width="600" Height="300">
    <Grid x:Name="LayoutRoot" Background="White">
        <Grid.Resources>
            <TestDataGridtudent.DateConverter x:Key="DateConverter"/>
        </Grid.Resources>

是不是写法不对？还是不支持内部类？

Answer 3

内部类,我没有试过,有空就去试试!

你的内部类声明为静态的,你试试看行不行.呵呵!

中午忙着给别人弄去了,没给你写,对不起啊!!

Answer 4

呵呵 你的例子已经给我很好的启发了 谢谢

加了static不行 也许不支持内部类吧