提取zip文件到目錄

Question

我使用模擬器和Xamarin工作室C＃Bt提取zip文件到目錄我得到的錯誤數我已經嘗試了一些方法，但無法解決這個問題。我可以如何解決這個問題。這是我的代碼：

string zipPath=("/storage/emulated/0/Download/file/file/file.epub"); 
    string extractPath = ("/storage/emulated/0/Download/file/file/temp"); 
    DateTime time = new DateTime(2016, 12, 30); 
    if (File.Exists(extractPath)) 
     File.SetLastWriteTime(extractPath, time); 
    ZipFile.ExtractToDirectory(zipPath, extractPath); 

但我得到這樣的錯誤：

[MonoDroid] System.IO.IOException: Invalid parameter 
[MonoDroid] at System.IO.File.SetLastWriteTime (System.String path, System.DateTime lastWriteTime) [0x00030] in <500f590720b848ecadaddac3c375ddb5>:0 
[MonoDroid] at AD_Forms.AD..ctor() [0x00061] in <21d9786453cc4650b478317d331d91ab>:0 
[MonoDroid] at AD_Forms.App..ctor() [0x00006] in <21d9786453cc4650b478317d331d91ab>:0 
[MonoDroid] at AD_Forms.Droid.MainActivity.OnCreate (Android.OS.Bundle bundle) [0x00022] in <21d9786453cc4650b478317d331d91ab>:0 
[MonoDroid] at Android.Support.V4.App.FragmentActivity.n_OnCreate_Landroid_os_Bundle_ (System.IntPtr jnienv, System.IntPtr native__this, System.IntPtr native_savedInstanceState) [0x00011] in <27c17fe440cf491ba8255bcefade6e02>:0 
[MonoDroid] at (wrapper dynamic-method) System.Object:a118a7e9-2106-4f87-a55c-98f583aa9bd8 (intptr,intptr,intptr) 
[art] JNI RegisterNativeMethods: attempt to register 0 native methods for android.runtime.JavaProxyThrowable 
[AndroidRuntime] Shutting down VM 
[AndroidRuntime] FATAL EXCEPTION: main 
[AndroidRuntime] Process: com.companyname.ad_forms, PID: 1909 
[AndroidRuntime] java.lang.RuntimeException: java.lang.reflect.InvocationTargetException 
[AndroidRuntime] at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
[AndroidRuntime] Caused by: java.lang.reflect.InvocationTargetException 
[AndroidRuntime] at java.lang.reflect.Method.invoke(Native Method) 
[AndroidRuntime] at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
[AndroidRuntime] ... 1 more 
[AndroidRuntime] Caused by: android.runtime.JavaProxyThrowable: System.IO.IOException: Invalid parameter 
[AndroidRuntime] at System.IO.File.SetLastWriteTime (System.String path, System.DateTime lastWriteTime) [0x00030] in <500f590720b848ecadaddac3c375ddb5>:0 
[AndroidRuntime] at AD_Forms.AD..ctor() [0x00061] in <21d9786453cc4650b478317d331d91ab>:0 
[AndroidRuntime] at AD_Forms.App..ctor() [0x00006] in <21d9786453cc4650b478317d331d91ab>:0 
[AndroidRuntime] at AD_Forms.Droid.MainActivity.OnCreate (Android.OS.Bundle bundle) [0x00022] in <21d9786453cc4650b478317d331d91ab>:0 
[AndroidRuntime] at Android.Support.V4.App.FragmentActivity.n_OnCreate_Landroid_os_Bundle_ (System.IntPtr jnienv, System.IntPtr native__this, System.IntPtr native_savedInstanceState) [0x00011] in <27c17fe440cf491ba8255bcefade6e02>:0 
[AndroidRuntime] at (wrapper dynamic-method) System.Object:a118a7e9-2106-4f87-a55c-98f583aa9bd8 (intptr,intptr,intptr) 
[AndroidRuntime] at md595826e4c93c1bb9112307fcbc37b1beb.MainActivity.n_onCreate(Native Method) 
[AndroidRuntime] at md595826e4c93c1bb9112307fcbc37b1beb.MainActivity.onCreate(MainActivity.java:29) 
[AndroidRuntime] at android.app.Activity.performCreate(Activity.java:6237) 
[AndroidRuntime] at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107) 
[AndroidRuntime] at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369) 
[AndroidRuntime] at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) 
[AndroidRuntime] at android.app.ActivityThread.-wrap11(ActivityThread.java) 
[AndroidRuntime] at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) 
[AndroidRuntime] at android.os.Handler.dispatchMessage(Handler.java:102) 
[AndroidRuntime] at android.os.Looper.loop(Looper.java:148) 
[AndroidRuntime] at android.app.ActivityThread.main(ActivityThread.java:5417) 

Answer 1

你添加的權限，可以在manifest文件？

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> 

本報告到Bugzilla提，這可能是由於Android的缺陷： https://bugzilla.xamarin.com/show_bug.cgi?id=3029

嘗試運行實際設備而不是模擬器的代碼來檢查其是否也有同樣的問題。