Hi I am trying to update a listbox that’s bound after I delete a folder but it doesn’t seem to update unless I go out of page and back can anyone help I have my code with class Project below, thanks for your help.
public partial class Page3 : PhoneApplicationPage
{
string[] fileNames;
string[] folderNames;
private string selectedProject = "";
private List<Project> projectList = new List<Project>();
public Page3()
{
InitializeComponent();
showProjects();
}
public void showProjects()
{
projectList.Clear();
IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication();
folderNames = isf.GetDirectoryNames("/*.*");
foreach (var name in folderNames)
{
fileNames = isf.GetFileNames(name + "/*.*");
int frameCount = 0;
foreach (var nameCount in fileNames)
{
frameCount++;
}
projectList.Add(new Project(name,frameCount));
}
listBoxProjects.ItemsSource = projectList;
}
private void listBoxProjects_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
}
public void DeleteDirectory(string directoryName)
{
try
{
IsolatedStorageFile myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication();
if (!string.IsNullOrEmpty(directoryName) && myIsolatedStorage.DirectoryExists(directoryName))
{
myIsolatedStorage.DeleteDirectory(directoryName);
}
}
catch (Exception ex)
{
// handle the exception
}
}
private void button1_Click(object sender, RoutedEventArgs e)
{
IsolatedStorageFile myIso;
string folder = textBoxDelete.Text;
using (myIso = IsolatedStorageFile.GetUserStoreForApplication())
{
String[] fileNames = myIso.GetFileNames(folder + "/*.*");
foreach (var name in fileNames)
{
MessageBox.Show(name);
myIso.DeleteFile(folder + "/" + name);
}
myIso.DeleteDirectory(folder);
showProjects();
}
}
}
public class Project
{
public string ProjectName { get; set; }
public int FileCount { get; set; }
public Project(string pName, int fileCount)
{
this.ProjectName = pName;
this.FileCount = fileCount;
}
}
}
You could try to set the listbox.Itemsource to null first and then reset it with the new collection.
But i would suggest you that you put you change your List<> items to an ObservableCollection<> and then if you change the collection the changes are automatically updated in your listbox, and try using binding much easier and cleaner solution.