80 lines
2.7 KiB
C#
80 lines
2.7 KiB
C#
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namespace SHH.CameraSdk;
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/// <summary>
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/// 视频源状态变更事件参数
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/// 核心职责：封装状态迁移的完整上下文信息，支撑三大业务场景
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/// <para>1. UI 层：实时反馈设备状态、显示错误提示</para>
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/// <para>2. 诊断层：记录异常堆栈、SDK 错误码，辅助问题定位</para>
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/// <para>3. 运维层：触发自动重连、告警推送等自动化决策</para>
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/// </summary>
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public class StatusChangedEventArgs : EventArgs
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{
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#region --- 事件核心属性 (Event Core Properties) ---
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/// <summary>
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/// 变更后的目标状态
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/// 业务用途：
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/// 1. UI 层：控制状态图标颜色（如 Playing→绿色、Faulted→红色）
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/// 2. 运维层：状态为 Reconnecting 时触发重连策略调整
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/// </summary>
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public VideoSourceStatus NewStatus { get; }
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/// <summary>
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/// 状态描述文本（可读）
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/// 业务用途：
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/// 1. UI 层：直接显示在状态栏或操作日志面板
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/// 2. 日志层：写入业务日志，便于人工排查
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/// </summary>
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public string Message { get; }
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/// <summary>
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/// 关联的异常对象（可选）
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/// 业务用途：仅当 NewStatus = Faulted 时有效，提供异常堆栈、类型等代码级诊断信息
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/// </summary>
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public Exception? Exception { get; }
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/// <summary>
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/// SDK 底层原始错误码（可选）
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/// 业务用途：
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/// 1. 厂商适配：匹配海康 NET_DVR_GetLastError、大华 SDK 错误码等
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/// 2. 精准诊断：区分“用户锁定(153)”“密码错误(41)”“网络超时”等根因
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/// </summary>
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public int? LastErrorCode { get; }
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/// <summary>
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/// 变更后的新句柄（可选）
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/// 业务用途：渲染器解绑/重绑场景，监听此值更新窗口句柄绑定关系
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/// </summary>
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public IntPtr? NewHandle { get; init; }
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/// <summary>
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/// 状态变更发生的时间戳
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/// 业务用途：日志时序排序、状态迁移耗时统计
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/// </summary>
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public DateTime Timestamp { get; } = DateTime.Now;
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#endregion
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#region --- 构造函数 (Constructor) ---
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/// <summary>
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/// 初始化状态变更事件参数
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/// </summary>
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/// <param name="status">变更后的目标状态</param>
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/// <param name="msg">可读的状态描述文本</param>
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/// <param name="ex">可选：关联的异常对象</param>
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/// <param name="errorCode">可选：SDK 底层错误码</param>
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public StatusChangedEventArgs(
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VideoSourceStatus status,
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string msg,
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Exception? ex = null,
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int? errorCode = null)
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{
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NewStatus = status;
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Message = msg;
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Exception = ex;
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LastErrorCode = errorCode;
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}
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#endregion
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}
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