修改了历史记录页面

DMS.WPF/ViewModels/VariableHistoryViewModel.cs

@@ -1,4 +1,5 @@
 using System.Collections;
+using System.Collections.ObjectModel;
 using AutoMapper;
 using CommunityToolkit.Mvvm.ComponentModel;
 using CommunityToolkit.Mvvm.Input;
@@ -38,7 +39,7 @@ partial class VariableHistoryViewModel : ViewModelBase, INavigatable
     /// 建议的变量列表
     /// </summary>
     [ObservableProperty]
-    private List<VariableHistoryDto> _suggestedVariables;
+    private ObservableCollection<VariableHistoryDto> _suggestedVariables;
     
     /// <summary>
     /// 历史记录条数限制
@@ -58,6 +59,12 @@ partial class VariableHistoryViewModel : ViewModelBase, INavigatable
     [ObservableProperty]
     private DateTime? _endTime;
     
+    /// <summary>
+    /// 选中的变量历史记录
+    /// </summary>
+    [ObservableProperty]
+    private VariableHistoryDto _selectedVariable;
+
     /// <summary>
     /// 变量历史记录列表
     /// </summary>
@@ -85,12 +92,13 @@ partial class VariableHistoryViewModel : ViewModelBase, INavigatable
         _variableHistorySynchronizedView = _variableHistoryList.CreateView(v => v);
         VariableHistories = _variableHistorySynchronizedView.ToNotifyCollectionChanged();
         _allVariableHistories = new List<VariableHistoryDto>();
-        _suggestedVariables = new List<VariableHistoryDto>();
+        _suggestedVariables = new ObservableCollection<VariableHistoryDto>();
         
         // 初始化默认值
         _historyLimit = 1000; // 默认限制1000条记录
         _startTime = null;
         _endTime = null;
+        _selectedVariable = new VariableHistoryDto();
     }
 
     /// <summary>
@@ -119,23 +127,31 @@ partial class VariableHistoryViewModel : ViewModelBase, INavigatable
     }
 
     /// <summary>
-    /// 更新建议的变量列表
+/// 更新建议的变量列表
-    /// </summary>
+/// </summary>
-    private void UpdateSuggestedVariables()
+private void UpdateSuggestedVariables()
-    {
+{
+    // 清空现有建议列表
+    _suggestedVariables.Clear();
+
     if (string.IsNullOrWhiteSpace(SearchText))
     {
         // 如果搜索文本为空，显示所有唯一的变量名
-            _suggestedVariables = _allVariableHistories
+        var uniqueVariables = _allVariableHistories
                              .GroupBy(h => h.VariableName)
                              .Select(g => g.First())
                              .Take(10)
                              .ToList();
+
+        foreach (var variable in uniqueVariables)
+        {
+            _suggestedVariables.Add(variable);
+        }
     }
     else
     {
         // 根据搜索文本过滤建议列表
-            _suggestedVariables = _allVariableHistories
+        var filteredVariables = _allVariableHistories
                                .Where(h =>
                                           h.VariableName?.Contains(SearchText, StringComparison.OrdinalIgnoreCase) ==
                                           true)
@@ -143,12 +159,40 @@ partial class VariableHistoryViewModel : ViewModelBase, INavigatable
                                .Select(g => g.First())
                                .Take(10)
                                .ToList();
-        }
 
+        foreach (var variable in filteredVariables)
+        {
+            _suggestedVariables.Add(variable);
+        }
+    }
+}
+
+    public async Task OnNavigatedToAsync(MenuItemViewModel menu)
+    {
+        // 加载所有变量的历史记录
+        LoadAllVariableHistories(HistoryLimit, StartTime, EndTime);
     }
     
     /// <summary>
-    /// 搜索变量历史记录
+    /// 重新加载历史记录命令
+    /// </summary>
+    [RelayCommand]
+    private void Reload()
+    {
+        LoadAllVariableHistories(HistoryLimit, StartTime, EndTime);
+    }
+    
+    /// <summary>
+    /// 更新建议列表命令
+    /// </summary>
+    [RelayCommand]
+    private void UpdateSuggestions()
+    {
+        UpdateSuggestedVariables();
+    }
+    
+    /// <summary>
+    /// 当搜索文本改变时触发
     /// </summary>
     /// <param name="value"></param>
     partial void OnSearchTextChanged(string value)
@@ -156,7 +200,7 @@ partial class VariableHistoryViewModel : ViewModelBase, INavigatable
         // 更新建议列表
         UpdateSuggestedVariables();
         
-        if (string.IsNullOrWhiteSpace(SearchText))
+        if (string.IsNullOrWhiteSpace(value))
         {
             // 如果搜索文本为空，显示所有历史记录
             _variableHistoryList.Clear();
@@ -168,7 +212,7 @@ partial class VariableHistoryViewModel : ViewModelBase, INavigatable
             var filteredHistories = _allVariableHistories
                                     .Where(h =>
                                                h.VariableName?.Contains(
-                                                   SearchText, StringComparison.OrdinalIgnoreCase) == true)
+                                                   value, StringComparison.OrdinalIgnoreCase) == true)
                                     .ToList();
 
             _variableHistoryList.Clear();
@@ -176,10 +220,30 @@ partial class VariableHistoryViewModel : ViewModelBase, INavigatable
         }
     }
     
-    public async Task OnNavigatedToAsync(MenuItemViewModel menu)
+    /// <summary>
+    /// 根据搜索文本过滤历史记录
+    /// </summary>
+    /// <param name="searchText"></param>
+    private void FilterHistoriesBySearchText(string searchText)
     {
-        // 加载所有变量的历史记录
+        if (string.IsNullOrWhiteSpace(searchText))
-        LoadAllVariableHistories(HistoryLimit, StartTime, EndTime);
+        {
+            // 如果搜索文本为空，显示所有历史记录
+            _variableHistoryList.Clear();
+            _variableHistoryList.AddRange(_allVariableHistories);
+        }
+        else
+        {
+            // 根据搜索文本过滤历史记录
+            var filteredHistories = _allVariableHistories
+                                    .Where(h =>
+                                               h.VariableName?.Contains(
+                                                   searchText, StringComparison.OrdinalIgnoreCase) == true)
+                                    .ToList();
+
+            _variableHistoryList.Clear();
+            _variableHistoryList.AddRange(filteredHistories);
+        }
     }
     
     /// <summary>

DMS.WPF/Views/VariableHistoryView.xaml

@@ -6,6 +6,7 @@
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
     xmlns:enums="clr-namespace:DMS.Core.Enums;assembly=DMS.Core"
     xmlns:ex="clr-namespace:DMS.Extensions"
+    xmlns:hc="https://handyorg.github.io/handycontrol"
     xmlns:helper="clr-namespace:DMS.WPF.Helper"
     xmlns:i="http://schemas.microsoft.com/xaml/behaviors"
     xmlns:ikw="http://schemas.inkore.net/lib/ui/wpf"
@@ -48,6 +49,7 @@
                         Spacing="10">
                         <TextBlock Style="{StaticResource VarHistoryLabelStyle}" Text="搜索变量:" />
                         <ui:AutoSuggestBox
+                            x:Name="SearchAutoSuggestBox"
                             Width="200"
                             ui:ControlHelper.PlaceholderText="搜索变量..."
                             Text="{Binding SearchText, UpdateSourceTrigger=PropertyChanged}"
@@ -58,6 +60,48 @@
                     </ikw:SimpleStackPanel>
                 </ikw:SimpleStackPanel>
             </GroupBox>
+            
+            <!--  时间范围和详细信息区域  -->
+            <GroupBox Header="详细信息">
+                <ikw:SimpleStackPanel Margin="5" Spacing="10">
+                    <!--  变量详细信息  -->
+                    <Grid>
+                        <Grid.ColumnDefinitions>
+                            <ColumnDefinition Width="Auto" />
+                            <ColumnDefinition Width="*" />
+                            <ColumnDefinition Width="Auto" />
+                            <ColumnDefinition Width="*" />
+                        </Grid.ColumnDefinitions>
+                        <Grid.RowDefinitions>
+                            <RowDefinition Height="Auto" />
+                            <RowDefinition Height="Auto" />
+                        </Grid.RowDefinitions>
+                        
+                        <TextBlock Grid.Row="0" Grid.Column="0" Style="{StaticResource VarHistoryLabelStyle}" Text="变量ID:" />
+                        <TextBlock Grid.Row="0" Grid.Column="1" Style="{StaticResource VarHistoryValueStyle}" Text="{Binding SelectedVariable.Id}" />
+                        
+                        <TextBlock Grid.Row="0" Grid.Column="2" Style="{StaticResource VarHistoryLabelStyle}" Text="变量名:" />
+                        <TextBlock Grid.Row="0" Grid.Column="3" Style="{StaticResource VarHistoryValueStyle}" Text="{Binding SelectedVariable.VariableName}" />
+                        
+                        <TextBlock Grid.Row="1" Grid.Column="0" Style="{StaticResource VarHistoryLabelStyle}" Text="当前值:" />
+                        <TextBlock Grid.Row="1" Grid.Column="1" Style="{StaticResource VarHistoryValueStyle}" Text="{Binding SelectedVariable.Value}" />
+                        
+                        <TextBlock Grid.Row="1" Grid.Column="2" Style="{StaticResource VarHistoryLabelStyle}" Text="更新时间:" />
+                        <TextBlock Grid.Row="1" Grid.Column="3" Style="{StaticResource VarHistoryValueStyle}" Text="{Binding SelectedVariable.Timestamp, StringFormat='{}{0:yyyy-MM-dd HH:mm:ss.fff}'}" />
+                    </Grid>
+                    
+                    <!--  时间范围选择  -->
+                    <ikw:SimpleStackPanel Orientation="Horizontal" Spacing="10">
+                        <TextBlock Style="{StaticResource VarHistoryLabelStyle}" Text="开始时间:" />
+                        <hc:DateTimePicker Width="200" SelectedDateTime="{Binding StartTime}" />
+                        
+                        <TextBlock Style="{StaticResource VarHistoryLabelStyle}" Text="结束时间:" />
+                        <hc:DateTimePicker Width="200" SelectedDateTime="{Binding EndTime}" />
+                        
+                        <Button Content="重新加载" Command="{Binding ReloadCommand}" />
+                    </ikw:SimpleStackPanel>
+                </ikw:SimpleStackPanel>
+            </GroupBox>
         </ikw:SimpleStackPanel>
 
         <DataGrid
@@ -67,6 +111,7 @@
             CanUserSortColumns="False"
             IsReadOnly="True"
             ItemsSource="{Binding VariableHistories}"
+            SelectedItem="{Binding SelectedVariable}"
             SelectionMode="Single"
             Style="{StaticResource DataGridBaseStyle}">
             <DataGrid.Columns>