griddata 绑定根据字段得到想要的结果，如 根据状态不同显示不用的图片

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Data;
using System.IO;
using System.Windows.Media.Imaging;

namespace zasd._120.jjz.ui
{
    public class CaseStateConverterImagePath : IValueConverter
    {
        private string imageDirectory = Directory.GetCurrentDirectory();
        public string ImageDirectory
        {
            get { return imageDirectory; }
            set { imageDirectory = value; }
        }

        #region delete yanliming 2013-11-7
        /// <summary>
        /// delete yanliming 2013-11-7
        /// </summary>
        /// <param name="value"></param>
        /// <param name="targetType"></param>
        /// <param name="parameter"></param>
        /// <param name="culture"></param>
        /// <returns></returns>
        //public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        //{
        //    string imagePath = Path.Combine(ImageDirectory, (string)value);
        //    return new BitmapImage(new Uri(imagePath));
        //}
        #endregion

        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            string state = "";
            if (value != null)
            {
                state = (string)value;
            }
            if (state == "20")//已派车
            {
                return new BitmapImage(new Uri("/zasd._120.jjz;component/resource/images/paiche.png", UriKind.RelativeOrAbsolute));
            }
            else if (state == "30" || state == "40")//已出车、已反馈
            {
                return new BitmapImage(new Uri("/zasd._120.jjz;component/resource/images/chuche.png", UriKind.RelativeOrAbsolute));
            }
            //50 已完成
            return new BitmapImage(new Uri("/zasd._120.jjz;component/resource/images/wanc.png", UriKind.RelativeOrAbsolute));
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            throw new NotSupportedException("The method or operation is not implemented.");
        }
    }
}

 

 

前台：

<Window x:Class="zasd._120.jjz.ui.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:mui="http:///ModernUI"
        xmlns:common="clr-namespace:zasd._120.util;assembly=zasd._120"

        xmlns:convertimage="clr-namespace:zasd._120.jjz.ui"
        Title="急救站系统" >

    <Window.Resources>
        <convertimage:CaseStateConverterImagePath x:Key="CaseStateConverterImagePath"></convertimage:CaseStateConverterImagePath>
    </Window.Resources>
        
       <DockPanel>
                <Grid>

                        <DataGrid Grid.Row="0"  Name="grid"        SelectionChanged="grid_SelectionChanged">
                            <DataGrid.Columns>
                                <DataGridTemplateColumn>
                                    <DataGridTemplateColumn.CellTemplate>
                                        <DataTemplate>
                                            <Image Stretch="None"
                                 Source="{Binding Status, Converter={StaticResource CaseStateConverterImagePath}}" >
                                            </Image>
                                        </DataTemplate>                                       
                                    </DataGridTemplateColumn.CellTemplate>
                                </DataGridTemplateColumn>
                                <DataGridTextColumn Header="类别" Binding="{Binding CategoryName,Mode=TwoWay}"/>
                                <DataGridTextColumn Header="病患数量" Binding="{Binding PatientCount,Mode=TwoWay}" Width="*"/>
                            </DataGrid.Columns>
                        </DataGrid>
                      

                 
                </Grid>
            </DockPanel>
        </Border>

    </DockPanel>
</Window>