private byte[] GetPage(ulong address)
{
byte[] buffer = new byte[4096];
uint error = GetLastError();
IntPtr procAddress = GetProcAddress(_helperLib, "ReadPage");
ReadPage rp = (ReadPage)Marshal.GetDelegateForFunctionPointer(procAddress, typeof(ReadPage));
int result = rp(address, buffer);
if (result == 0)
{
return(buffer);
}
return(null);
}
private async void OnItemTapped(object sender, ItemTappedEventArgs e)
{
if (e.Item == null)
{
return;
}
ListNode selected = e.Item as ListNode;
if (selected.Children == true)
{
Device.BeginInvokeOnMainThread(() =>
{
UserDialogs.Instance.ShowLoading();
});
storedTree = await Task.Run(() =>
{
Task.Delay(200).Wait();
return(client.GetChildren(selected.Id));
});
Device.BeginInvokeOnMainThread(() =>
{
UserDialogs.Instance.HideLoading();
});
hierarchyAddressSpace.Push(storedTree);
hierarchyStringAddressSpace.Push(selected.NodeName);
ParentNodeEntry.Text = selected.NodeName;
ParentLayout.IsVisible = true;
DisplayNodes();
}
else
{
await DisplayAlert("Info", "There are no children for this node!", "Ok");
if (selected.NodeClass.Equals("Variable"))
{
if (useMode)
{
var selection = await DisplayActionSheet("Select Action: ", "cancel", null, "Read", "Write");
if (selection.Equals("Read"))
{
ContentPage readPage = new ReadPage(client, selected.Id);
readPage.Title = "OPC Read Service";
await Navigation.PushAsync(readPage);
Navigation.RemovePage(this);
}
else if (selection.Equals("Write"))
{
ContentPage writePage = new WritePage(client, selected.Id);
writePage.Title = "OPC Write Service";
await Navigation.PushAsync(writePage);
Navigation.RemovePage(this);
}
}
else
{
var choice = await DisplayAlert("Info", "Do you want to create a monitored item for this variable node?", "yes", "no");
if (choice)
{
MessagingCenter.Send <BrowsePage, string> (this, "update", selected.Id);
Navigation.RemovePage(this);
}
}
}
}
}
public void LoadSubPage()
{
this.SubPage = new ReadPage(this.Style, Deep, this.Config);
this.SubPage.SetUpperDataName(this.DataName, FieldType.read_value);
this.subLsitMethod = this.SubPage.GetListMethods(this.DataName);
}
public App()
{
InitializeComponent();
MainPage = new ReadPage();
}
