Download ASP.NET Solutions - 24 Case Studies: Best Practices for by Rick Leinecker PDF

By Rick Leinecker

Many builders are already accustomed to the fundamentals of ASP.NET and feature been inspired with its power to ease the production of net functions. in spite of the fact that, few assets exist for these trying to translate their wisdom of ASP.NET into adapted suggestions for genuine demanding situations builders face on a regular basis.Enter ASP.NET options - 23 Case experiences, the authoritative consultant for real-world strategies, layout styles, and most sensible practices utilizing the .NET framework and C# and VB .NET languages. Honed via education courses for professional builders, the book's case experiences show the way to construct greater than twenty varied purposes utilizing a variety of elements of ASP.NET. every one bankruptcy builds on those who got here sooner than, permitting readers to increase their programming abilities via utilising the know-how to more and more advanced tasks.

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For example, a Button control has as its default event a Click event. The default event fires in response to users clicking the button. But the Button control also can respond to other events, including a Command event. NET applications, but it is there for those rare cases when it's needed. Command events give developers an opportunity to specify events other than the default event. Default events are so important because handler methods are easily created for them by simply double-clicking on the control in the Design window.

To use this control for my application, all I do is drag it from the Toolbox onto the form, then edit its properties so that the ControlToValidate property is set to the Web Forms control that must be validated. If I run my application now, and I submit with nothing in the editable field, I get a message in red text saying RequiredFieldValidator. If I type something in the editable field, then I do not get that message. Actually, for this message to come up with the text RequiredFieldValidator to alert the user of some sort of an error is not very user friendly.

The example shown uses the SQL managed provider. However, if a connection to another database is required and the connection is using the OLE DB provider, then simply change the SQL command references to OleDb commands, and the remaining code will be the same. RECOMMENDED PRACTICE: Garbage collection is non-deterministic. NET objects, such as theSqlDataReader. The best way to do that is in the finally block of a try/catch/finally construct, as follows: // Declare objects here. try { // Open objects and use them here.

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