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Page Revision: Fri, Feb 04, 2011, 5:23 PM

All the following code snippets are written in C#, although some of them can be copied verbatim into Visual Basic .NET. You can convert code between C# and VB.NET at this website.. The information on Reflection has been moved to its own page.

Table of Contents [Hide/Show]    Environment          Username          Computer Name          Computer Name, Fully Qualified with Domain Name    Network          IP Address          Ping Operation          Default Gateway    Other          Hourglass/Default Cursor          ASCII Codes          New GUID          Sleep          Detecting Design-Time          Resources          Embedded Resources          Threading          Escaping XML Characters          Time Remaining

Environment¶

Username¶

//for Windows applications
System.Environment.UserName 
//for Web applications
HttpContext.Current.User.Identity.Name

Computer Name¶

 // Option #1
System.Environment.MachineName
// Option #2
System.Net.Dns.GetHostName()

Computer Name, Fully Qualified with Domain Name¶

System.Net.Dns.GetHostEntry(Environment.MachineName).HostName

Network¶

IP Address¶

System.Net.Dns.GetHostAddresses(string hostName)[0]

Ping Operation¶

using System.Net.NetworkInformation;

. . .

try {
    new Ping().Send(address).Status == IPStatus.Success
}
catch (Exception ex) {
}

Default Gateway¶

using System.Net.NetworkInformation;
using System.Net;

. . .

List<IPAddress> addresses = new List<IPAddress>();

foreach (NetworkInterface networkCard in NetworkInterface.GetAllNetworkInterfaces())
{
    GatewayIPAddressInformationCollection gateways 
        = networkCard.GetIPProperties().GatewayAddresses;

    foreach (GatewayIPAddressInformation gateway in gateways)
        addresses.Add(gateway.Address);
}

Other¶

Hourglass/Default Cursor¶

this.Cursor = Cursors.WaitCursor;
this.Cursor = Cursors.Default;

ASCII Codes¶

char c; 
int asciiCode = (int)c;

New GUID¶

System.Guid.NewGuid().ToString()

Sleep¶

System.Threading.Thread.Sleep(ms)

Detecting Design-Time¶

System.Diagnostics.Debugger.IsAttached = true;

Resources¶

picHide.Image = (System.Drawing.Image)

// Note that resourceName IS CASE-SENSITIVE!
Resources.ResourceManager.GetObject(resourceName);

Embedded Resources¶

Cursor result = null;
/* resourceName follows the format
 *    Namespace.Folder.Resources.FileName  */
string resourceName = "MyApp.Resources.SelectTextLine.cur";
Stream s = Assembly.GetExecutingAssembly().GetManifestResourceStream(resourceName);

if (s != null)
    result = new Cursor(s);

Threading¶

using System.Threading;

// starter.Start is the name of the object/method to call
Thread t = new Thread(new ThreadStart(starter.Start));
t.Start();

Escaping XML Characters¶

System.Security.SecurityElement.Escape(inputText);

Time Remaining¶

private static TimeSpan CalcTimeRemaining(int n, int m, TimeSpan elapsed)
{
    double rate = elapsed.TotalMilliseconds / (double)n;
    double ms = ((double)m - (double)n) * rate;
    long ticks = (long)(ms * 10000);
    TimeSpan remaining = new TimeSpan(ticks);
    return remaining;
}