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Download 101 Microsoft Visual Basic .NET Applications by 3 Leaf Solutions, Sean Campbell PDF

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By 3 Leaf Solutions, Sean Campbell

Consultant offers remark on one zero one absolutely executable code samples. each one code pattern demonstrates center positive factors and capabilities of visible simple .NET and the .NET Framework, explains the underlying programming recommendations, and gives a whole code walkthrough. For starting and intermediate .NET builders and visible uncomplicated 6 builders. Softcover.

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AddHours(CDbl(txtHours. AddTicks(CLng(txtTicks. AddYears(CInt(txtYears. ToString DateTime Properties In addition to the DateTime shared properties, you can access a number of useful properties specific to a particular DateTime instance: instance properties. First, you declare and assign a value to a DateTime variable, as shown in the following code, taken from the LoadProperties procedure in frmMain. Now Once you have the object variable, you can access a variety of properties, including the following ones.

You haven’t turned on just-in-time (JIT) debugging in your application’s config file. The global exception handler is a welcome new capability, but you can take it further by attaching your own handler to take care of untrapped exceptions. ThreadException and associating it with an OnThreadException procedure. Private Sub cmdTrapped_Click(... ' Turn on our own global exception handle r. NET Language 49 GenerateError() End Sub When an untrapped exception occurs, OnThreadException gets executed, and in it you can do any type of handling you care to.

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. Another limitation of the On Error GoTo construct was that you could have only one active error handler per procedure. That meant that a second On Error GoTo statement would inactivate the first one. Number. At times, the error-handling code was greater in size than the code it was protecting.

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