/// <summary>
/// 初始化
/// </summary>
public static void Init()
{
string path = GetSettingsFilePath();
if (!File.Exists(path))
{
throw new FileNotFoundException("上传控件的配置文件不存在！");
}
// 注意啦：访问文件是可能会出现异常。不要学我，我写的是示例代码。
var settings = Deserialize(path);
int flag = System.Threading.Interlocked.CompareExchange(ref s_UploadSettingsCacheDependencyFlag, 1, 0);
// 确保只调用一次就可以了。
if (flag == 0)
{
// 让Cache帮我们盯住这个配置文件。
CacheDependency dep = new CacheDependency(path);
HttpRuntime.Cache.Insert(_cacheKey, "yxl", dep, Cache.NoAbsoluteExpiration, Cache.NoSlidingExpiration, UploadSettingsUpdateCallback);
}
_instance = settings;
}
static UploadHelper()
{
UploadSettings.Init();
}