WPF中DataGrid显示图片，绑定图片路径显示

Posted 2023-01-09 棉晗榜

Xaml页面

<Page x:Class="WpfSnqkGasAnalysis.PageUser"
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
      xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
      xmlns:local="clr-namespace:WpfSnqkGasAnalysis.Model;assembly=WpfSnqkGasAnalysis.Model" 
      xmlns:local1="clr-namespace:WpfSnqkGasAnalysis"
      mc:Ignorable="d" 
      d:DesignHeight="450" d:DesignWidth="800"
      Title="PageUser" Loaded="Page_Loaded">
    <Page.Resources>
        <local1:ImgShowConvert x:Key="imgShow"></local1:ImgShowConvert>
    </Page.Resources>
    <Grid>       
        <Grid.RowDefinitions>
            <RowDefinition Height="60"></RowDefinition>
            <RowDefinition Height="*"></RowDefinition>
        </Grid.RowDefinitions>
        <DockPanel LastChildFill="False" Grid.Row="0">
            <Label Content="账号：" Style="StaticResource Label1"  />
            <TextBox  x:Name="txtAccount" Text="" Style="StaticResource input1" Margin="0,0,20,0" />
            <Button x:Name="btnSearch" Content="查询"  Style="StaticResource buttonBlue" HorizontalAlignment="Left" VerticalAlignment="Center" Click="btnSearch_Click"/>
        </DockPanel>
        <Grid Grid.Row="1">
            <DataGrid  x:Name="dgUser"  ItemsSource="Binding "  Style="StaticResource DataGrid1" AutoGenerateColumns="False" SelectionUnit="Cell" CanUserAddRows="True" CellEditEnding="dgUser_CellEditEnding"   >
                <DataGrid.Columns>
                    <DataGridTextColumn ElementStyle="StaticResource dataGridColumn" Width="200" Header="账号" Binding="Binding User_account"  ></DataGridTextColumn>
                    <DataGridTextColumn ElementStyle="StaticResource dataGridColumn" Width="200" Header="姓名" Binding="Binding User_real_name,Mode=TwoWay"></DataGridTextColumn>
                    <DataGridComboBoxColumn   Width="200" Header="角色" TextBinding="Binding Role_id,Mode=TwoWay "  ItemsSource="x:Static  local:CommonConfig.RoleList  " SelectedItemBinding="Binding  Role_id,UpdateSourceTrigger=PropertyChanged"   />
                    <DataGridCheckBoxColumn   Width="100"  Header="是否启用" Binding="Binding U_stat,Mode=TwoWay"  ></DataGridCheckBoxColumn>
                    <DataGridTemplateColumn Header="电子签名"  >
                        <DataGridTemplateColumn.CellTemplate>
                            <DataTemplate>                           
                                <Image Source="Binding SignatureImgPath,Converter=StaticResource imgShow " MaxHeight="60" ></Image>
                            </DataTemplate>
                        </DataGridTemplateColumn.CellTemplate>
                    </DataGridTemplateColumn>
                    <DataGridTextColumn ElementStyle="StaticResource dataGridColumn" Width="300"   Header="备注" Binding="Binding Remark,Mode=TwoWay"></DataGridTextColumn>
                    <DataGridTemplateColumn  Header="操作" Width="*">
                        <DataGridTemplateColumn.CellTemplate>
                            <DataTemplate>
                                <StackPanel Orientation="Horizontal" Style="StaticResource StackPanel_buttonSpance">
                                    <Button  Name="btnEdit" Tag="Binding Id" HorizontalAlignment="Left" VerticalAlignment="Center" Content="上传电子签名"   Click="BtnImgName_Click"  />
                                </StackPanel>
                            </DataTemplate>
                        </DataGridTemplateColumn.CellTemplate>
                    </DataGridTemplateColumn>
                </DataGrid.Columns>
            </DataGrid>
        </Grid>
    </Grid>   
</Page>

后台代码

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Data;
using System.Windows.Media.Imaging;
using WpfSnqkGasAnalysis.Model;

namespace WpfSnqkGasAnalysis

    /// <summary>
    /// DataGrid 中 图片展示
    /// </summary>
    /// 创建时间：2023-1-5 16:01:35。 
    public class ImgShowConvert : IValueConverter
    
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        
            string imgSaveUrl = System.Convert.ToString(value);
            if (string.IsNullOrWhiteSpace(imgSaveUrl)) return null;
            try
            
                imgSaveUrl = imgSaveUrl.TrimStart('\\\\');
                imgSaveUrl = imgSaveUrl.TrimStart('/');

                string imgPath = System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, imgSaveUrl);
                if (!System.IO.File.Exists(imgPath))
                
                    return null;
                

                //开始加载图像
                BitmapImage bim = new BitmapImage();
                bim.BeginInit();
                bim.CacheOption = BitmapCacheOption.OnLoad;                 
                bim.StreamSource = System.IO.File.OpenRead(imgPath);
                bim.EndInit();
                return bim;
            
            catch (Exception ex)
            
                //LogHelpter.AddLog(ex.Message, null, "img_show_error");
                return null;
            
        

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        
            return value;