ow

uniapp/Google Chrome/PreviewLog.cs

@@ -0,0 +1,27 @@
+using System.Diagnostics;
+
+namespace WinFormsApp3
+{
+    /// <summary>
+    /// 截图预览诊断日志：exe 目录下 preview_debug.log。
+    /// 挂起类问题光看界面定位不到，必须把每一步（含线程号）落到磁盘上。
+    /// </summary>
+    public static class PreviewLog
+    {
+        private static readonly object Gate = new();
+        private static readonly string FilePath = Path.Combine(AppContext.BaseDirectory, "preview_debug.log");
+
+        public static void Write(string message)
+        {
+            string line = $"{DateTime.Now:HH:mm:ss.fff} [T{Thread.CurrentThread.ManagedThreadId:D2}] {message}";
+            try
+            {
+                lock (Gate) File.AppendAllText(FilePath, line + Environment.NewLine);
+            }
+            catch
+            {
+                // 日志写失败不影响功能
+            }
+        }
+    }
+}