优化

Src/FrmMain.cs

@@ -232,10 +232,10 @@ namespace Kivii.Sample.ImageUploader
             try
             {
                 // 获取摄像头支持的分辨率列表
-                VideoCapabilities[] capabilities = videoDevice.VideoCapabilities;
+                videoCapabilities = videoDevice.VideoCapabilities;
 
                 // 遍历分辨率列表，并添加到下拉框中
-                foreach (VideoCapabilities capability in capabilities)
+                foreach (VideoCapabilities capability in videoCapabilities)
                 {
                     cbxResolution.Items.Add(string.Format("{0} x {1}",
                         capability.FrameSize.Width, capability.FrameSize.Height));
@@ -402,10 +402,10 @@ namespace Kivii.Sample.ImageUploader
                 MessageBox.Show("未连接");
                 return;
             }
-            if (reportId.IsNullOrEmpty())
-            {
             currentReport = null;
             showCurrentReport();
+            if (reportId.IsNullOrEmpty())
+            {
                 return;
             }
             var request = new ReportRequest();