Use created DLL in a Wpf window?

Question

I have a DLL with the following code

using System.Text;
using Microsoft.Win32;
using System.Diagnostics;
using System.Runtime.InteropServices;

namespace ApplicationCheck
{
    public  class ApCkr
    {

        #region .NET
        public string Netframeworkavailable()
        {
            bool NETinstall;
            RegistryKey k1 = Registry.LocalMachine.OpenSubKey("SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Client");
            if (k1 == null)
            {
                NETinstall = false;
            }
            else
            {
                NETinstall = true;
            }
            return NETinstall.ToString();
        }


        #endregion

        #region PDF
        public string PDFavailable()
        {
            bool PDFinstall;
            RegistryKey k2 = Registry.ClassesRoot.OpenSubKey(".pdf");
            if (k2 == null)
            {
                PDFinstall = false;
            }
            else
            {
                PDFinstall = true;
            }
            return PDFinstall.ToString(); 
        }
        #endregion


        #region IExplore

        public string IEavailable()
        {

            bool IEversion;
            string  k3 = Registry.LocalMachine.OpenSubKey("SOFTWARE\Microsoft\Internet Explorer").GetValue("Version").ToString();
            string z = k3.Substring(0, 1);
            int a = Int32.Parse(z);

             if (a < 8)
            {
                IEversion = false;
            }
            else
            {
                IEversion = true;
            }
            return IEversion.ToString();
        }
        #endregion


        #region IIS
        public string IISavailable()
        {
            bool IISinstall;
            RegistryKey k4 = Registry.LocalMachine.OpenSubKey("SOFTWARE\Microsoft\InetStp");
            if (k4 == null)
            {
                IISinstall = false;
            }
            else
            {
                IISinstall = true;
            }
            return IISinstall.ToString();
        }


        #endregion

    }

}

And a WPF window with the followig XAML code

and the WPF's c# code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

namespace WpfApplication1
{
    /// 
    /// Interaction logic for Window2.xaml
    /// 
    public partial class Window2 : Window
    {
        public Window2()
        {
            InitializeComponent();
        }

        private void textBlock1_ContextMenuOpening(object sender, ContextMenuEventArgs e)
        {
            var NET = new ApplicationCheck.ApCkr();
            textBlock1.Text = NET.Netframeworkavailable();
            this.DataContext = textBlock1;

        }


    }
}

I researched data binding in MSDN and At stack overflow namely this - DataBinding Between a WPF GUI and a couple of ListBox/CheckBox

and others but i cannot get it right.And although stack overflow helped me utilise this in a console app.Now i have to do this in a WPF window.

Edit:I have to display the returned values from the DLL

Uri London · Accepted Answer

In order to present the data from the DLL in the UI using binding, you need to have an object with public getters. In your UI DLL create a class (in mvvm design patern, this class is called 'View Model') with the public getters:

public class ApCkrVm {
    public string netFrameworkAvailable {
        get { return ApCkr.NetFrameworkAvailable(); }
    }
    public string pdfAvailable {
        get { return ApCkr.PDFAvailable(); }
    }
    ...
}

Then, in Window2 constructor, set ApCkrVm to be the DataContext:

public Window2( ) {
    this.DataContext = new ApCkrVm( );
    InitializeComponent( );
}

Finally, add text blocks in the XML file, binding the Text to the properties:

Some other comments:

You aren't utilizing very well the element. You'll be better off defining ColumnDefinitions and RowDefinitions, creating a 2xn table.
ApCkr method can all be static. This class has no context.
I don't think your application could run if .net framework isn't available. If your application is running, you can safely put 'true' there.
Consider caching the values in ApCkrVm.

Use created DLL in a Wpf window?

Answers (2)

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