By 3 Leaf Solutions, Sean Campbell
Consultant presents statement on one zero one absolutely executable code samples. each one code pattern demonstrates middle positive factors and services of visible easy .NET and the .NET Framework, explains the underlying programming suggestions, and gives a whole code walkthrough. For starting and intermediate .NET builders and visible uncomplicated 6 builders. Softcover.
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Extra info for 101 Microsoft Visual Basic .NET Applications
ToCharArra y, 3) Shared Methods In all the previous examples, a method was invoked on an instance of a string, sampleString. In these examples, we’re demonstrating shared methods, which are methods that don’t need an instance of a string but are invoked on the String class itself. • Compare When you want to compare two strings, the Compare method offers a variety of ways to do it. In addition to specifying the two strings to be compared, you can optionally specify whether to ignore case, where to start comparing, how many characters to compare, and which culture information to use.
IsAssembly Then output &= "Friend " End If ' Is it shared? Name & "(" We’re gathering information about the method’s parameters, including the name, type, and whether the parameter is ByVal or ByRef. We could also have included whether the parameter was optional, as well as other information. GetMethod. Name) Next pi ' Get rid of the first ", " if it exists. Substring(2) End If ' Get the procedure's return type and app end it to the output string. ToString Now we’re optionally showing more detailed information about the method, such as its namespace, the module in which it’s declared, the name of the file it lives in, and its line and column number in the file.
In Visual Basic 6, you probably constructed your error handlers something like this: Sub Foo() On Error GoTo ErrHandler ' Code that could fail ExitHere: ' Close database connections, delete Exit Sub ErrHandler: 'Handle the error Resume ExitHere End Sub temp files, etc. This is a classic example of spaghetti code. First you jump to the ErrHandler label if there’s an error, and then after handling the error, you jump back to ExitHere to make sure you clean up any resources in use. Finally, you exit the procedure with the Exit Sub statement.
101 Microsoft Visual Basic .NET Applications by 3 Leaf Solutions, Sean Campbell