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[英]isolated storage exception operation not permitted in Windows Phone 8
[英]Windows Phone - Isolated Storage exception
下面的代码捕获用户选择的服务器路径,并保存在IsolatedStorage中:
private void ConfSalvar(object sender, RoutedEventArgs e)
{
IsolatedStorageSettings iso = IsolatedStorageSettings.ApplicationSettings;
if (iso.Contains("isoServer"))
{
iso["isoServer"] = server.Text;
}
else
{
iso.Add("isoServer", server.Text);
}
}
下一个代码(另一个屏幕)使用保存在IsolatedStorage上的服务器路径创建URL:
IsolatedStorageSettings iso = IsolatedStorageSettings.ApplicationSettings;
if (iso.TryGetValue<string>("isoServer", out retornaNome))
{
serv = retornaNome;
}
private void sinc(object sender, EventArgs e)
{
order.Visibility = Visibility.Collapsed;
client = new WebClient();
url = serv + "/json.html";
Uri uri = new Uri(url, UriKind.RelativeOrAbsolute);
client.OpenReadCompleted += new OpenReadCompletedEventHandler(client_OpenReadCompleted);
client.DownloadProgressChanged += new DownloadProgressChangedEventHandler(client_DownloadProgressChanged);
client.OpenReadAsync(uri);
}
private void client_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)
{
string strFileName = url.Substring(url.LastIndexOf("/") + 1, (url.Length - url.LastIndexOf("/") - 1));
IsolatedStorageFile isoStore = IsolatedStorageFile.GetUserStoreForApplication();
// Path Storage
// *** If File Exists
if (isoStore.FileExists(strFileName))
{
isoStore.DeleteFile(strFileName);
}
IsolatedStorageFileStream dataFile = new IsolatedStorageFileStream(strFileName, FileMode.CreateNew, isoStore);
long fileLen = e.Result.Length;
byte[] b = new byte[fileLen];
e.Result.Read(b, 0, b.Length);
dataFile.Write(b, 0, b.Length);
dataFile.Flush();
object lenghtOfFile = dataFile.Length;
dataFile.Close();
order.Visibility = Visibility.Visible;
ProgressBar1.Visibility = Visibility.Collapsed;
MessageBox.Show("Arquivo salvo!");
}
private void client_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
{
ProgressBar1.Visibility = Visibility.Visible;
this.ProgressBar1.Value = e.ProgressPercentage;
}
因此,如果我保存了文件路径,并且在单击“ sinc”按钮之后立即发生了异常“操作期间发生了异常,导致结果无效。请检查InnerException以获取异常详细信息。”。 但是,如果我保存了文件路径并关闭了该应用程序,请打开该应用程序并单击“ sinc”按钮,它可以正常工作。
对不起英语不好
这与IsolatedStorageSettings
无关。 工作正常。 问题是在创建Uri
您将UriKind
设置为RelativeOrAbsolute
。
那就是抛出Exception和InnerException的原因,即This operations is not supported for a relative URI
。 您需要做的是将UriKind
更改为Absolute
。 因此,代码块应如下所示。
private void sinc(object sender, EventArgs e)
{
if (iso.TryGetValue<string>("isoServer", out retornaNome))
{
serv = retornaNome;
}
else
{
// Let the user know.
return;
}
order.Visibility = Visibility.Collapsed;
client = new WebClient();
url = serv + "/json.html";
Uri uri = new Uri(url, UriKind.Absolute); // <<< Absolute instead of RelativeOrAbsolute
client.OpenReadCompleted += new OpenReadCompletedEventHandler(client_OpenReadCompleted);
client.DownloadProgressChanged += new DownloadProgressChangedEventHandler(client_DownloadProgressChanged);
client.OpenReadAsync(uri);
}
那应该可以解决您的问题,并且可以正常工作:)
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