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PowerTCP Email Validation for .NET |
| Dart.PowerTCP.EmailValidation Namespace : Dns Class (Dart.PowerTCP.EmailValidation) |
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PowerTCP Email Validation for .NET |
| Dart.PowerTCP.EmailValidation Namespace : Dns Class (Dart.PowerTCP.EmailValidation) |
Provides domain name resolution.
For a list of all members of this type, see Dns members.
System.Object
System.MarshalByRefObject
System.ComponentModel.Component
Dart.PowerTCP.EmailValidation.Dns
[Visual Basic]
<ToolboxItemAttribute(ToolboxItemType=, ToolboxItemTypeName="")>
<DescriptionAttribute("The Dns Component resolves names, addresses, and mail servers.")>
Public Class Dns
Inherits Component[C#]
[ToolboxItemAttribute(ToolboxItemType=, ToolboxItemTypeName="")]
[DescriptionAttribute("The Dns Component resolves names, addresses, and mail servers.")]
public class Dns : Component[C++]
[ToolboxItemAttribute(ToolboxItemType=, ToolboxItemTypeName="")]
[DescriptionAttribute("The Dns Component resolves names, addresses, and mail servers.")]
public __gc class Dns : public Component[C++/CLI]
[ToolboxItemAttribute(ToolboxItemType=, ToolboxItemTypeName="")]
[DescriptionAttribute("The Dns Component resolves names, addresses, and mail servers.")]
public ref class Dns : public ComponentThe Domain Name System (DNS) uses servers distributed across the Internet to provide domain name/IP address translation and electronic mail routing information.
The Dns class provides forward lookup (resolve a name to an address), reverse lookup (resolve an address to a name), and MX lookup (resolve an email address to the mail server address responsible for that mail domain). Synchronous and asynchronous use is fully supported.
The following example demonstrates using the Dns control to resolve a domain name.
[Visual Basic]
Private Sub ResolveTest()
Dns1.Servers.Add("206.64.128.5") 'Adds this server to list of DNS servers
Dns1.RotateServers = True 'Will always try next server in Dns1.Servers
Dns1.Retries = 2 'On failures, try an additional two times
Dns1.RetryInterval = 0 'Do not wait between retries
Dim result As System.Net.IPHostEntry = Dns1.GetHost("www.dart.com")
DisplayResult(result)
End Sub
Private Sub DisplayResult(ByVal result As System.Net.IPHostEntry)
' Display host name
Debug.WriteLine("Host name: " + result.HostName)
' Display addresses, if any
Dim add As System.Net.IPAddress
For Each add In result.AddressList
Debug.WriteLine("Address: " + add.ToString())
Next
' Display aliases, if any
Dim s As String
For Each s In result.Aliases
Debug.WriteLine("Aliases: " + s)
Next
End Sub
[C#]
private void ResolveTest()
{
dns1.Servers.Add("206.64.128.5"); 'Adds this server to list of
DNS servers
dns1.RotateServers = true; 'Will always try next server in Dns1.Servers
dns1.Retries = 2; 'On failures, try an additional two times
dns1.RetryInterval = 0; 'Do not wait between retries
System.Net.IPHostEntry result = dns1.GetHost("www.dart.com");
DisplayResult(result);
}
private void DisplayResult(System.Net.IPHostEntry result)
{
// Display host name
Debug.WriteLine("Host name: " + result.HostName);
// Display addresses, if any
foreach(System.Net.IPAddress add in result.AddressList)
Debug.WriteLine("Address: " + add.ToString());
// Display aliases, if any
foreach(string s in result.Aliases)
Debug.WriteLine("Aliases: " + s);
}
Namespace: Dart.PowerTCP.EmailValidation
Platforms: Windows 98, Windows NT 4.0, Windows ME, Windows 2000, Windows XP, Windows Server 2003, Windows Vista
Assembly: Dart.PowerTCP.EmailValidation (in Dart.PowerTCP.EmailValidation.dll)
Dns Members | Dart.PowerTCP.EmailValidation Namespace
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Documentation version 1.0.3.0.
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