windows phone 7应用程序中的IsolatedStorageException
本文关键字:IsolatedStorageException 应用程序 phone windows | 更新日期: 2023-09-27 18:30:02
我正在尝试读取一个未在应用程序中创建的文件。
这是我试过的样品:
string FileName = "stops.txt";
string FolderName = "data";
string FilePath = System.IO.Path.Combine(FolderName, FileName);
IsolatedStorageFile myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication();
IsolatedStorageFileStream fileStream = myIsolatedStorage.OpenFile(FilePath, FileMode.Open, FileAccess.Read);
using (StreamReader reader = new StreamReader(fileStream))
{
MessageBox.Show(reader.ReadLine());
}
我抛出了一个"隔离存储异常":链接到异常
System.IO.IsolatedStorage.IsolatedStorageException: [IsolatedStorage_Operation_ISFS]
Arguments:
Debugging resource strings are unavailable. Often the key and arguments provide sufficient information to diagnose the problem. See http://go.microsoft.com/fwlink/?linkid=106663&Version=4.0.50829.0&File=mscorlib.dll&Key=IsolatedStorage_Operation_ISFS
at System.IO.IsolatedStorage.IsolatedStorageFileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, IsolatedStorageFile isf)
at System.IO.IsolatedStorage.IsolatedStorageFile.OpenFile(String path, FileMode mode, FileAccess access)
at HorairesCTS.MainPage.test()
at HorairesCTS.MainPage..ctor()
有人能帮我读这个文件吗?
谢谢!
如果您尝试读取包含在项目中的文件,它将不在IsolatedStorage
中。您需要通过Application.GetResourceStream
访问它。
以下是读取本地文本文件的示例代码:
private string ReadTextFile(string filePath)
{
var resourceStream = Application.GetResourceStream(new Uri(filePath, UriKind.Relative));
Stream myFileStream = resourceStream.Stream;
StreamReader myStreamReader = new StreamReader(myFileStream);
return myStreamReader.ReadToEnd();
}
不要忘记在Visual Studio中的文件属性中将Build action
设置为Content
。
ReadTextFile("data/stops.txt")
如果您想保存对象列表。你可以这样做:
IsolatedStorageFileStream outStream = new IsolatedStorageFileStream("MyData.bin", FileMode.Create, myStore);
DataContractSerializer ser = new DataContractSerializer(typeof(List<ClsUser>));
ser.WriteObject(outStream, valutaTyperListe);
outStream.Close();
获取数据:
IsolatedStorageFile myStore = IsolatedStorageFile.GetUserStoreForApplication();
if (myStore.FileExists("MyData.bin"))
{
IsolatedStorageFileStream inStream = new IsolatedStorageFileStream("MyData.bin", FileMode.Open, myStore);
DataContractSerializer Serializ = new DataContractSerializer(typeof(List<ClsUser>));
myUserList = Serializ.ReadObject(inStream) as List<ClsUser>;
inStream.Close();
}
类看起来是这样的,记得添加"using System.Runtime.Serialization;":
[DataContract]
public class ClsUser
{
string name;
string lastname;
public ClsUser(string name, string lastname)
{
this.name = name;
this.lastname = lastname;
}
[DataMember]
public string Name
{
get { return name; }
set { name = value; }
}
[DataMember]
public string Lastname
{
get { return lastname; }
set { lastname = value; }
}
}