public async Task RemoveWallpaperAsync(Int32 userId, Int32 wallpaperId)
{
Check.IfNullOrZero(userId);
Check.IfNullOrZero(wallpaperId);
await Task.Run(() =>
{
using var mapper = EntityMapper.CreateMapper();
try
{
#region 前置条件验证
{
var result = mapper.Query <Config>().Where(a => a.UserId == userId && a.WallpaperId == wallpaperId).Count();
if (result > 0)
{
throw new BusinessException("当前壁纸正在使用中，不能删除");
}
}
#endregion
#region 移除壁纸
{
var wallpaper = new Wallpaper();
wallpaper.Remove();
var result = mapper.Update(wallpaper, wa => wa.Id == wallpaperId && wa.UserId == userId);
if (!result)
{
throw new BusinessException("移除壁纸失败");
}
}
#endregion
}
catch (System.Exception)
{
throw;
}
});
}