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‘ Returns whether a SQL Server DB with the specified name is present’ The first param must be a valid connection string to the ‘master’ database’ Requires Imports System.Data.SqlClient” Example:’
‘ Restarts the default web site in IIS Sub RestartDefaultSite() Dim p As New Process() p.StartInfo.FileName = “net.exe” p.StartInfo.WindowStyle = ProcessWindowStyle.Hidden ‘ set the parameters to STOP the service p.StartInfo.Arguments
was recently working on a project to develop a multiplayer game for J2ME devices. In this application communication from the server to the device was originally coded as simple key-value
evelopers are beginning to understand that .NET Windows Forms are a powerful technology for building a large class of applications for the Windows .NET platform. They offer nearly the same
he more time I spend thinking about alternative programming methodologies, the more I wonder why there’s so much resistance. Which is to say that I generally believe in the concepts
henever I bump into one of my Java friends, he invariably tells me C# is no better than Java. I generally reply that one of my favorite features of C#
ow well does your Java Web site perform? Does it have enough capacity to handle today’s user demands on its busiest days? Can it support additional users in the future?
ring interactivity to any Web site with this easy-to-follow guidebook on JavaScript. Author Scott Duffy takes the fear out of working with a programming language by delivering instruction and theory
very programmer can quite easily write a servlet that can perform character streaming of XML or HTML data. As long as the proper MIME type is set before the data
racle announced this morning that it has created a new version of the Oracle 9i application server, the Java edition, which it is targeting at current BEA application server customers
‘ Validate an e-mail address’ Example:’ MessageBox.Show(IsValidEmail(“[email protected]”)) ‘ True’ MessageBox.Show(IsValidEmail(“vb2themax.com”)) ‘ False’ MessageBox.Show(IsValidEmail(“mbellinaso@vb2themax”)) ‘ FalseFunction IsValidEmail(ByVal email As String) As Boolean Return System.Text.RegularExpressions.Regex.IsMatch(email, _ “^w+([-+.]w+)*@w+([-.]w+)*.w+([-.]w+)*$”)End Function
‘ Validate a US ZIP code’ Example:’ MessageBox.Show(IsValidUsZip(“12345”)) ‘ => True’ MessageBox.Show(IsValidUsZip(“12345-1234”)) ‘ => True’ MessageBox.Show(IsValidUsZip(“12345-12345”)) ‘ => FalseFunction IsValidUsZip(ByVal zip As String) As Boolean Return System.Text.RegularExpressions.Regex.IsMatch(zip, _ “^(d{5}-d{4})|(d{5})$”)End Function
‘ Validate a URL’ Example: MessageBox.Show(IsValidUrl(“http://www.vb2themax.com”))Function IsValidUrl(ByVal url As String) As Boolean Return System.Text.RegularExpressions.Regex.IsMatch(url, _ “(http|ftp|https)://([w-]+.)+(/[w- ./?%&=]*)?”)End Function
‘ Validate an IP address’ Example:’ MessageBox.Show(IsValidIP(“123.14.0.255”)) ‘ => True’ MessageBox.Show(IsValidIP(“256.14.0.255”)) ‘ => FalseFunction IsValidIP(ByVal ipAddress As String) As Boolean Return System.Text.RegularExpressions.Regex.IsMatch(ipAddress, _ “^(25[0-5]|2[0-4]d|[0-1]?d?d)(.(25[0-5]|2[0-4]d|[0-1]?d?d)){3}$”)End Function
‘ Validate a US Social Security Number’ Example:’ MessageBox.Show(IsValidUsSSN(“123-12-1234”)) ‘ True’ MessageBox.Show(IsValidUsSSN(“123-123-1234”)) ‘ FalseFunction IsValidUsSSN(ByVal ssn As String) As Boolean Return System.Text.RegularExpressions.Regex.IsMatch(ssn, _ “^d{3}-d{2}-d{4}$”)End Function
‘ Validate a US phone number’ Example:’ MessageBox.Show(IsValidUsPhoneNumber(“(123) 456-7890”)) ‘ True’ MessageBox.Show(IsValidUsPhoneNumber(“(123) 456-78901”)) ‘ FalseFunction IsValidUsPhoneNumber(ByVal phnNum As String) As Boolean Return System.Text.RegularExpressions.Regex.IsMatch(phnNum, _ “^(((d{3}) ?)|(d{3}-))?d{3}-d{4}$”)End Function
‘ Validate a system path’ Example:’ MessageBox.Show(IsValidPath(“C:TestMemo.txt”)) ‘ => True’ MessageBox.Show(IsValidPath(“\RemotePCTestMemo.txt”)) ‘ => True’ MessageBox.Show(IsValidPath(“C:TestMem|o.txt”)) ‘ => FalseFunction IsValidPath(ByVal path As String) As Boolean Try Dim f As New System.IO.FileInfo(path)
ava developers, here’s your chance to survey the scope of J2ME (Java 2 Micro Edition) knowledge in one solidly written reference. Discover the basic architecture and functionality of J2ME and
s in the prior editions, the authors have exhausted themselves to deliver the very latest in network security technologies and techniques. A special new bonus feature of the book is
t has often been said that programmers are introverts. I find that this isn’t true, in the majority of cases, but programmers usually do have a longer attention span and
he .NET framework supports configuration files to supply settings and static data to both ASP.NET and Windows Forms applications. Configuration files are XML-formatted files loaded at startup time and cached
In this installment, you’ll explore the challenges a developer faces whentrying to build a single set of user interface code that will work on alltargeted platforms. You’ll see what goes
‘ this code assumes that you have used this Imports statement’ Imports Microsoft.Win32Function IsExcelInstalled() As Boolean ‘ Define the RegistryKey objects for the registry hives. Dim regClasses As RegistryKey =
‘ Extract the name of the SoapException’s (the type of exception thrown by a ‘ web service) “inner” exception.” Example:’ Try’ ‘ this call throws an exception’ Dim service As
‘ Execute a batch of OleDb commands.’ Parameters:’ – The list of statements separated by ; chars. Use the ? char as a ‘ placeholder for a parameter.’ – The
‘ Search the specified string, with the case-sensitive mode or not’ Returns the index of the first occurrence found, or -1 if not foundPublic Function SearchString(ByVal source As String, ByVal
‘ Reverse the input string, without using the StrRever function in the VB6 ‘ compatibility assemblyFunction ReverseString(ByVal source As String) As String Dim chars() As Char = source.ToCharArray() Array.Reverse(chars) Return
‘ this code assumes that you have used this Imports statement’ Imports Microsoft.Win32Function IsWordInstalled() As Boolean ‘ Define the RegistryKey objects for the registry hives. Dim regClasses As RegistryKey =
‘ Count the number of string occurrencesPublic Function CountOccurrences(ByVal source As String, ByVal search As String, _ Optional ByVal ignoreCase As Boolean = False) As Integer Dim options As System.Text.RegularExpressions.RegexOptions
‘ Return the number of checked nodes in the specified treePublic Function CountCheckedNodes(ByVal rootNode As TreeNode) As Integer Dim count As Integer = 0 ‘ count the root node, if
