chore: Try Catch

This commit is contained in:
tangge233
2024-10-09 00:24:47 +08:00
parent 71d915f3ef
commit 50112b70bd
+30 -26
View File
@@ -30,32 +30,36 @@ Public Class MyImage
Set(value As String)
If String.IsNullOrEmpty(value) Then Exit Property
_SourceData = value
If Not value.StartsWithF("http") Then ' 本地资源直接使用
MyBase.Source = New MyBitmap(_SourceData)
Exit Property
End If
If _DownloadTask IsNot Nothing AndAlso Not _DownloadTask.IsCompleted Then ' 之前下载任务还在,直接砍了
_DownloadTask.Dispose()
End If
Dim NeedDownload As Boolean = True '是否需要下载/本地是否有有效缓存
Dim TempFilePath As String = PathTemp & "Cache\MyImage\" & GetHash(_SourceData) & ".png"
If _UseCache And File.Exists(TempFilePath) And (DateTime.Now - File.GetCreationTime(TempFilePath)) < FileCacheExpiredTime Then NeedDownload = False ' 缓存文件存在且未过期,不需要重下
If Not NeedDownload Then
MyBase.Source = New MyBitmap(TempFilePath)
Exit Property
End If
' 异步下载图片
Dim TaskID = 0
_DownloadTask = New Task(Sub()
NetDownload(_SourceData, TempFilePath, True)
End Sub)
TaskID = _DownloadTask.Id
_DownloadTask.Start()
_DownloadTask.ContinueWith(Sub(t)
If t.IsCompleted AndAlso t.Id = TaskID Then ' 任务没有被干掉
MyBase.Source = New MyBitmap(TempFilePath)
End If
End Sub, TaskScheduler.FromCurrentSynchronizationContext())
Try
If Not value.StartsWithF("http") Then ' 本地资源直接使用
MyBase.Source = New MyBitmap(_SourceData)
Exit Property
End If
If _DownloadTask IsNot Nothing AndAlso Not _DownloadTask.IsCompleted Then ' 之前下载任务还在,直接砍了
_DownloadTask.Dispose()
End If
Dim NeedDownload As Boolean = True '是否需要下载/本地是否有有效缓存
Dim TempFilePath As String = PathTemp & "Cache\MyImage\" & GetHash(_SourceData) & ".png"
If _UseCache And File.Exists(TempFilePath) And (DateTime.Now - File.GetCreationTime(TempFilePath)) < FileCacheExpiredTime Then NeedDownload = False ' 缓存文件存在且未过期,不需要重下
If Not NeedDownload Then
MyBase.Source = New MyBitmap(TempFilePath)
Exit Property
End If
' 异步下载图片
Dim TaskID = 0
_DownloadTask = New Task(Sub()
NetDownload(_SourceData, TempFilePath, True)
End Sub)
TaskID = _DownloadTask.Id
_DownloadTask.Start()
_DownloadTask.ContinueWith(Sub(t)
If t.IsCompleted AndAlso t.Id = TaskID Then ' 任务没有被干掉
MyBase.Source = New MyBitmap(TempFilePath)
End If
End Sub, TaskScheduler.FromCurrentSynchronizationContext())
Catch ex As Exception
Log(ex, "加载图片失败")
End Try
End Set
End Property
Public Shared Shadows ReadOnly SourceProperty As DependencyProperty = DependencyProperty.Register("Source", GetType(String), GetType(MyImage), New PropertyMetadata(New PropertyChangedCallback(