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client/WorkCameraExport/Forms/WorkRecordForm.Designer.cs

@@ -30,6 +30,11 @@ namespace WorkCameraExport.Forms
         {
             components = new System.ComponentModel.Container();
             
+            // 图片右键菜单
+            contextMenuImage = new ContextMenuStrip(components);
+            menuItemDownloadImage = new ToolStripMenuItem();
+            menuItemCopyUrl = new ToolStripMenuItem();
+            
             // 主面板
             panelMain = new Panel();
             
@@ -365,6 +370,7 @@ namespace WorkCameraExport.Forms
             btnAdd.Text = "➕ 新增";
             btnAdd.UseVisualStyleBackColor = false;
             btnAdd.Click += btnAdd_Click;
+            btnAdd.Enabled = false; // 禁用新增按钮
             
             // 
             // btnExportAll
@@ -471,6 +477,7 @@ namespace WorkCameraExport.Forms
             dgvWorkRecords.CellClick += dgvWorkRecords_CellClick;
             dgvWorkRecords.CellContentClick += dgvWorkRecords_CellContentClick;
             dgvWorkRecords.CellPainting += dgvWorkRecords_CellPainting;
+            dgvWorkRecords.CellMouseClick += dgvWorkRecords_CellMouseClick;
             
             // 
             // colSelect - 选择列
@@ -560,6 +567,7 @@ namespace WorkCameraExport.Forms
             colOperations.Text = "编辑";
             colOperations.UseColumnTextForButtonValue = true;
             colOperations.Width = 70;
+            colOperations.ReadOnly = true; // 禁用编辑列
 
             // 
             // panelPaging - 分页控件区域
@@ -760,6 +768,29 @@ namespace WorkCameraExport.Forms
             
             // 
             // WorkRecordForm
+            // 
+            // contextMenuImage
+            // 
+            contextMenuImage.Items.AddRange(new ToolStripItem[] { menuItemDownloadImage, menuItemCopyUrl });
+            contextMenuImage.Name = "contextMenuImage";
+            contextMenuImage.Size = new Size(150, 48);
+            
+            // 
+            // menuItemDownloadImage
+            // 
+            menuItemDownloadImage.Name = "menuItemDownloadImage";
+            menuItemDownloadImage.Size = new Size(149, 22);
+            menuItemDownloadImage.Text = "下载图片";
+            menuItemDownloadImage.Click += menuItemDownloadImage_Click;
+            
+            // 
+            // menuItemCopyUrl
+            // 
+            menuItemCopyUrl.Name = "menuItemCopyUrl";
+            menuItemCopyUrl.Size = new Size(149, 22);
+            menuItemCopyUrl.Text = "复制URL";
+            menuItemCopyUrl.Click += menuItemCopyUrl_Click;
+            
             // 
             AutoScaleDimensions = new SizeF(7F, 17F);
             AutoScaleMode = AutoScaleMode.Font;
@@ -782,6 +813,7 @@ namespace WorkCameraExport.Forms
             panelPaging.ResumeLayout(false);
             panelPaging.PerformLayout();
             panelProgress.ResumeLayout(false);
+            contextMenuImage.ResumeLayout(false);
             ResumeLayout(false);
         }
 
@@ -850,5 +882,10 @@ namespace WorkCameraExport.Forms
         private ProgressBar progressBar;
         private Label lblProgress;
         private Button btnCancelExport;
+        
+        // 图片右键菜单
+        private ContextMenuStrip contextMenuImage;
+        private ToolStripMenuItem menuItemDownloadImage;
+        private ToolStripMenuItem menuItemCopyUrl;
     }
 }

client/WorkCameraExport/Forms/WorkRecordForm.cs

@@ -249,7 +249,7 @@ namespace WorkCameraExport.Forms
         /// <summary>
         /// 单元格绘制事件 - 用于绘制图片缩略图
         /// </summary>
-        private async void dgvWorkRecords_CellPainting(object? sender, DataGridViewCellPaintingEventArgs e)
+        private void dgvWorkRecords_CellPainting(object? sender, DataGridViewCellPaintingEventArgs e)
         {
             // 只处理图片列
             if (e.ColumnIndex != colImages.Index || e.RowIndex < 0)
@@ -272,7 +272,6 @@ namespace WorkCameraExport.Forms
             var startX = cellBounds.X + 5;
             var startY = cellBounds.Y + (cellBounds.Height - ThumbnailHeight) / 2;
 
-            // 绘制缩略图占位符
             using var placeholderBrush = new SolidBrush(Color.FromArgb(230, 230, 230));
             using var borderPen = new Pen(Color.FromArgb(200, 200, 200));
             using var textBrush = new SolidBrush(Color.FromArgb(102, 102, 102));
@@ -283,16 +282,35 @@ namespace WorkCameraExport.Forms
                 var x = startX + i * (ThumbnailWidth + ThumbnailSpacing);
                 var rect = new Rectangle(x, startY, ThumbnailWidth, ThumbnailHeight);
                 
-                // 绘制占位符背景
+                var imageUrl = record.Images[i].ImageUrl;
-                e.Graphics.FillRectangle(placeholderBrush, rect);
-                e.Graphics.DrawRectangle(borderPen, rect);
                 
-                // 绘制图片序号
+                // 检查缓存中是否有图片
-                var text = $"图{i + 1}";
+                if (_thumbnailCache.TryGetValue(imageUrl, out var cachedImage) && cachedImage != null)
-                var textSize = e.Graphics.MeasureString(text, font);
+                {
-                var textX = x + (ThumbnailWidth - textSize.Width) / 2;
+                    // 绘制缓存的图片
-                var textY = startY + (ThumbnailHeight - textSize.Height) / 2;
+                    e.Graphics.DrawImage(cachedImage, rect);
-                e.Graphics.DrawString(text, font, textBrush, textX, textY);
+                    e.Graphics.DrawRectangle(borderPen, rect);
+                }
+                else
+                {
+                    // 绘制占位符背景
+                    e.Graphics.FillRectangle(placeholderBrush, rect);
+                    e.Graphics.DrawRectangle(borderPen, rect);
+                    
+                    // 绘制加载中文字
+                    var text = "加载中";
+                    var textSize = e.Graphics.MeasureString(text, font);
+                    var textX = x + (ThumbnailWidth - textSize.Width) / 2;
+                    var textY = startY + (ThumbnailHeight - textSize.Height) / 2;
+                    e.Graphics.DrawString(text, font, textBrush, textX, textY);
+                    
+                    // 异步加载图片（只触发一次）
+                    if (!_thumbnailCache.ContainsKey(imageUrl))
+                    {
+                        _thumbnailCache[imageUrl] = null; // 标记为正在加载
+                        _ = LoadThumbnailAsync(imageUrl, e.RowIndex);
+                    }
+                }
             }
 
             // 绘制徽章（显示剩余图片数量）
@@ -316,6 +334,58 @@ namespace WorkCameraExport.Forms
             e.Handled = true;
         }
 
+        /// <summary>
+        /// 异步加载缩略图
+        /// </summary>
+        private async Task LoadThumbnailAsync(string imageUrl, int rowIndex)
+        {
+            try
+            {
+                var (success, imageData, _) = await _apiService.DownloadImageAsync(imageUrl);
+                if (success && imageData != null && imageData.Length > 0)
+                {
+                    using var ms = new MemoryStream(imageData);
+                    var originalImage = Image.FromStream(ms);
+                    
+                    // 创建缩略图
+                    var thumbnail = new Bitmap(ThumbnailWidth, ThumbnailHeight);
+                    using (var g = Graphics.FromImage(thumbnail))
+                    {
+                        g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
+                        g.DrawImage(originalImage, 0, 0, ThumbnailWidth, ThumbnailHeight);
+                    }
+                    originalImage.Dispose();
+                    
+                    _thumbnailCache[imageUrl] = thumbnail;
+                    
+                    // 刷新对应行
+                    if (InvokeRequired)
+                    {
+                        Invoke(() => InvalidateRow(rowIndex));
+                    }
+                    else
+                    {
+                        InvalidateRow(rowIndex);
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                _logService?.Warn($"加载缩略图失败: {imageUrl}, {ex.Message}");
+            }
+        }
+
+        /// <summary>
+        /// 刷新指定行
+        /// </summary>
+        private void InvalidateRow(int rowIndex)
+        {
+            if (rowIndex >= 0 && rowIndex < dgvWorkRecords.Rows.Count)
+            {
+                dgvWorkRecords.InvalidateRow(rowIndex);
+            }
+        }
+
         /// <summary>
         /// 单元格点击事件 - 处理图片点击打开查看器
         /// </summary>
@@ -345,6 +415,128 @@ namespace WorkCameraExport.Forms
             }
         }
 
+        // 当前右键选中的图片信息
+        private string? _contextMenuImageUrl;
+        private int _contextMenuRowIndex = -1;
+
+        /// <summary>
+        /// 单元格鼠标点击事件 - 处理右键菜单
+        /// </summary>
+        private void dgvWorkRecords_CellMouseClick(object? sender, DataGridViewCellMouseEventArgs e)
+        {
+            if (e.RowIndex < 0 || e.Button != MouseButtons.Right)
+                return;
+
+            // 只处理图片列的右键
+            if (e.ColumnIndex == colImages.Index)
+            {
+                var row = dgvWorkRecords.Rows[e.RowIndex];
+                var record = row.Tag as WorkRecordDto;
+                
+                if (record?.Images != null && record.Images.Count > 0)
+                {
+                    // 计算点击的是哪张图片
+                    var cellBounds = dgvWorkRecords.GetCellDisplayRectangle(e.ColumnIndex, e.RowIndex, false);
+                    var clickX = e.X;
+                    var imageIndex = clickX / (ThumbnailWidth + ThumbnailSpacing);
+                    
+                    if (imageIndex >= 0 && imageIndex < record.Images.Count)
+                    {
+                        _contextMenuImageUrl = record.Images[imageIndex].ImageUrl;
+                        _contextMenuRowIndex = e.RowIndex;
+                        
+                        // 显示右键菜单
+                        var screenPoint = dgvWorkRecords.PointToScreen(new Point(
+                            cellBounds.X + e.X, 
+                            cellBounds.Y + e.Y));
+                        contextMenuImage.Show(screenPoint);
+                    }
+                }
+            }
+        }
+
+        /// <summary>
+        /// 下载图片菜单项点击
+        /// </summary>
+        private async void menuItemDownloadImage_Click(object? sender, EventArgs e)
+        {
+            if (string.IsNullOrEmpty(_contextMenuImageUrl))
+                return;
+
+            try
+            {
+                // 创建 image 目录
+                var imageDir = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "image");
+                if (!Directory.Exists(imageDir))
+                {
+                    Directory.CreateDirectory(imageDir);
+                }
+
+                // 生成文件名
+                var fileName = Path.GetFileName(_contextMenuImageUrl);
+                if (string.IsNullOrEmpty(fileName) || !fileName.Contains('.'))
+                {
+                    fileName = $"image_{DateTime.Now:yyyyMMdd_HHmmss}.jpg";
+                }
+                var savePath = Path.Combine(imageDir, fileName);
+                
+                // 确保文件名唯一
+                var counter = 1;
+                var baseName = Path.GetFileNameWithoutExtension(savePath);
+                var ext = Path.GetExtension(savePath);
+                while (File.Exists(savePath))
+                {
+                    savePath = Path.Combine(imageDir, $"{baseName}_{counter}{ext}");
+                    counter++;
+                }
+
+                lblStatusBar.Text = "正在下载图片...";
+                lblStatusBar.ForeColor = Color.Blue;
+
+                var (success, imageData, message) = await _apiService.DownloadImageAsync(_contextMenuImageUrl);
+                
+                if (success && imageData != null)
+                {
+                    await File.WriteAllBytesAsync(savePath, imageData);
+                    lblStatusBar.Text = $"图片已保存: {savePath}";
+                    lblStatusBar.ForeColor = Color.Green;
+                    _logService?.Info($"图片下载成功: {savePath}");
+                }
+                else
+                {
+                    lblStatusBar.Text = $"下载失败: {message}";
+                    lblStatusBar.ForeColor = Color.Red;
+                }
+            }
+            catch (Exception ex)
+            {
+                lblStatusBar.Text = $"下载失败: {ex.Message}";
+                lblStatusBar.ForeColor = Color.Red;
+                _logService?.Error($"下载图片失败: {ex.Message}", ex);
+            }
+        }
+
+        /// <summary>
+        /// 复制URL菜单项点击
+        /// </summary>
+        private void menuItemCopyUrl_Click(object? sender, EventArgs e)
+        {
+            if (string.IsNullOrEmpty(_contextMenuImageUrl))
+                return;
+
+            try
+            {
+                Clipboard.SetText(_contextMenuImageUrl);
+                lblStatusBar.Text = "URL已复制到剪贴板";
+                lblStatusBar.ForeColor = Color.Green;
+            }
+            catch (Exception ex)
+            {
+                lblStatusBar.Text = $"复制失败: {ex.Message}";
+                lblStatusBar.ForeColor = Color.Red;
+            }
+        }
+
         /// <summary>
         /// 单元格内容点击事件 - 处理操作按钮
         /// </summary>