当我尝试使用await运行其他函数时，我在构造函数（UnauthorisedAccessException）上遇到特定错误。我用await来使我的进度条可见，否则看不到。你能指出我的错误吗？我必须提交我的代码。我在这里添加了全班。如果我删除等待，进度条仍然不可见。如果我按照我的方式使用它，它会抛出异常。请帮忙。
public partial class FeatureSelection1 : PhoneApplicationPage
{
static int Dataset = 0;
static int maxRej = 0;
static int file_type = 0;
static String path_Healthy = "";
static String path_faulty = "";
static float[,] faultyData;
static float[,] healthyData;
public FeatureSelection1()
{
InitializeComponent();
}
private void OptionSelection_SelectionChanged_1(object sender, SelectionChangedEventArgs e)
{
var selectedItem = (sender as ListPicker).SelectedItem;
Dataset = (int)Math.Ceiling(float.Parse(selectedItem.ToString()));
}
private void OptionSelection6_SelectionChanged_1(object sender, SelectionChangedEventArgs e)
{
var selectedItem = (sender as ListPicker).SelectedItem;
maxRej = (int)Math.Ceiling(float.Parse(selectedItem.ToString()));
}
protected override void OnBackKeyPress(System.ComponentModel.CancelEventArgs e)
{
base.OnBackKeyPress(e);
MessageBoxResult m = MessageBox.Show("You are aborting operation." , "Disclaimer" , MessageBoxButton.OKCancel);
if (m == MessageBoxResult.OK)
NavigationService.Navigate(new Uri("/Procedure Selection.xaml" , UriKind.Relative));
}
private async void SelectFeature_Click_1(object sender, RoutedEventArgs e)
{
String test1 = (App.Current as App).Folder_Name;
String test2 = (App.Current as App).Folder_Name2;
if (test1 == "" || test2 == "")
{
MessageBox.Show("Please select the files before proceeding");
}
else
{
ReadFaultyFile(test1);
ReadHealthyFile(test2);
progressBar1.Visibility = System.Windows.Visibility.Visible;
TextBox3.Visibility = System.Windows.Visibility.Visible;
await Task.Run( ()=> FileExplorer.FeatureSelection2.mainFunc(healthyData, faultyData, Dataset, maxRej));
progressBar1.Visibility = System.Windows.Visibility.Collapsed;
TextBox3.Visibility = System.Windows.Visibility.Collapsed;
}
}
private void Faulty_Click_1(object sender, RoutedEventArgs e)
{
file_type = 1;
(App.Current as App).FeatSelect = 1;
// MessageBoxResult m = MessageBox.Show("Please select a file and then follow the instructions up ahead to use it to process", "GENERAL INSTRUCTIONS", MessageBoxButton.OK);
// if (m == MessageBoxResult.OK)
NavigationService.Navigate(new Uri("/IsoAccess3.xaml", UriKind.Relative));
}
private void Healthy_Click_1(object sender, RoutedEventArgs e)
{
file_type = 2;
(App.Current as App).FeatSelect =2;
// MessageBoxResult m = MessageBox.Show("Please select a file and then follow the instructions up ahead to use it to process", "GENERAL INSTRUCTIONS", MessageBoxButton.OK);
// if (m == MessageBoxResult.OK)
NavigationService.Navigate(new Uri("/IsoAccess3.xaml", UriKind.Relative));
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
OptionSelection.ItemsSource = new String[] { "0", "1", "2", "3", "4", "5", "6", "7", "8" };
OptionSelection6.ItemsSource = new String[] { "0", "1", "2", "3" };
progressBar1.IsIndeterminate = true;
progressBar1.IsEnabled = true;
progressBar1.Visibility = System.Windows.Visibility.Collapsed;
TextBox3.Visibility = System.Windows.Visibility.Collapsed;
base.OnNavigatedTo(e);
if (file_type == 1)
{
TextBox2.DataContext = (App.Current as App).Folder_Name;
path_faulty = (App.Current as App).Folder_Name;
}
else if(file_type == 2)
{
TextBox1.DataContext = (App.Current as App).Folder_Name2;
path_Healthy = (App.Current as App).Folder_Name2;
}
file_type = 0;
(App.Current as App).s = "";
}
public void ReadFaultyFile(String path)
{
IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication();
String contents = "";
// String temp = "";
int i = 0, j = 0,length=0;
StringBuilder sb = new StringBuilder();
if (isf.FileExists(path))
{
using (StreamReader reader =
new StreamReader(isf.OpenFile(path,
FileMode.Open, FileAccess.Read)))
{
contents = reader.ReadToEnd();
String[] str = contents.Split('\n');
String[] str2 = str[0].Split(',');
for (int k = 0; k < str.Length; k++)
{
if (str[k] == "")
continue;
length += 1;
}
faultyData = new float[length, str2.Length - 1];
for (i = 0; i <= str.Length - 1; i++)
{
j = 0;
str2 = str[i].Split(',');
for (j = 0; j < str2.Length - 1; j++)
{
if (str2[i].Length == 0)
continue;
faultyData[i, j] = float.Parse(str2[j]);
}
}
}
}
}
public void ReadHealthyFile(String path)
{
IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication();
String contents = "";
// String temp = "";
int i=0 , j=0 , length =0;
StringBuilder sb = new StringBuilder();
if (isf.FileExists(path))
{
using (StreamReader reader =
new StreamReader(isf.OpenFile(path,
FileMode.Open, FileAccess.Read)))
{
contents = reader.ReadToEnd();
String[] str = contents.Split('\n');
String[] str2 = str[0].Split(',');
for (int k = 0; k < str.Length; k++)
{
if (str[k] == "")
continue;
length += 1;
}
healthyData = new float[length, str2.Length - 1];
for (i = 0; i <= str.Length - 1; i++)
{
j = 0;
str2 = str[i].Split(',');
for (j = 0; j < str2.Length - 1; j++)
{
if (str2[i].Length == 0)
continue;
healthyData[i, j] = float.Parse(str2[j]);
}
}
}
}
}
}
}
MainFunc（）
public static void mainFunc(float[,] brej_healthy, float[,] brej_faulty, int dataset, int maxreject) // the main working function
{
feature = brej_healthy.GetLength(1);
datawidth = brej_faulty.GetLength(0) / dataset;
FeatureSelection2.dataset = dataset;
score = new int[feature];
for (int i = 0; i < feature; i++) // Creates an array of all zeroes
score[i] = 1;
int dataset_old = dataset;
float[,] healthy = brej_healthy;
float[,] faulty = brej_faulty;
int[] indices;
score = asyncFeatureDatasetSelect(healthy, faulty, feature, datawidth, dataset, dataset_old, maxreject, score, 50);
int count = -1;
indices = new int[feature];
for (int i = 0; i < feature; i++)
{
if (score[i] != 0)
{
count += 1;
indices[count] = i;
}
}
// return indices;
// CAn return Index as output of this function. Chek the matlab code for this.
}