指纹登录延时如果open数据库失败则状态数据库状态是否为打开，打开则先关再开

DM_Weight/Services/UserService.cs

@@ -32,6 +32,10 @@ namespace DM_Weight.Services
                 catch (Exception ex)
                 {
                     logger.Info($"Open失败：{ex.ToString()}");
+                    if (con.State == System.Data.ConnectionState.Open)
+                    {
+                        con.Close();
+                    }
                     Thread.Sleep(200);
                     logger.Info("再次Open");
                     con.Open();
@@ -45,6 +49,7 @@ namespace DM_Weight.Services
                 cmd.Parameters.AddRange(mySqlParameter);
                 //执行语句
                 MySqlDataReader reader = cmd.ExecuteReader();
+                logger.Info("MySqlDataReader读数据");
                 while (reader.Read())
                 {
                     user = new UserList();