Application hangs after a DataGridView is Populated

Question

I have a simple form with two buttons (Start and Stop) and a DataGridView. I am trying to populate the DataGridView with the results of a WMI query that enumerates Win32_Process instances and puts all process names in the only column of the DataGridView. The code looks like this:

using System;
using System.Management;
using System.Windows.Forms;

namespace WindowsFormsApplication10
{
    public partial class Form1 : Form
    {
        ManagementObjectSearcher Searcher =
            new ManagementObjectSearcher();

        SelectQuery Query = new SelectQuery();

        ManagementOperationObserver Observer =
            new ManagementOperationObserver();

        public Form1()
        {
            InitializeComponent();

            Observer.Completed +=
                new CompletedEventHandler(Observer_Completed);
            Observer.ObjectReady +=
                new ObjectReadyEventHandler(Observer_ObjectReady);
            Grid.ColumnCount = 1;
            Grid.Columns[0].Name = "Name";
        }

        private void Start_Click(object sender, EventArgs e)
        {
            Query.QueryString = "Select * From Win32_Process";
            Searcher.Query = Query;

            Searcher.Get(Observer);
        }

        private void Observer_Completed
            (object sender, CompletedEventArgs e)
        {
            Grid.Refresh();
        }

        private void Observer_ObjectReady
            (object sender, ObjectReadyEventArgs e)
        {
            string [] row = new string [] 
                {e.NewObject["Name"].ToString()};
            Grid.Rows.Add(row);

            Grid.Refresh();
        }

        private void stop_Click(object sender, EventArgs e)
        {
            Observer.Cancel();
        }
    }
}

When I run the code using the 'Start Debugging' option it runs fine and populates the DataGridView. One strange thing (at least to me) I noticed is that in the Observer_ObjectReady the Grid.Refresh() line is never reached. When I run the code with 'Start Without Debugging' the DataGridView is populated but the form freezes immediately after that. How can I deal with this? (Sorry if this is not enough information - I am willing to provide more if necessary, but, as you might have noticed, I don't have much experience with C# or Visual Studio).

Answer 1

You shouldn't to add a row to your GridView everytime you receive a new entry. You could to load all your processes into a collection and them to bind it to your control.

I just found this link and reading its source code can help you to achieve your objective: Manage Processes on Remote Machine