By G. Andrew Duthie
ASP.NET in a nutshell appeals to 2 audiences: newbies and complex builders. the center crew is missed. The samples have been simply coded and labored. even though, the article version describing the gadgets have been referenced as complicated schematics within the appendix. one other set of examples had to be incorporated that confirmed find out how to have interaction with the item tools and houses of the .net elements. I needed to visit the net and skim a number of articles to find easy methods to manage the parts via their item version. i have integrated a couple of samples on my site.
Configuration Settings used to be now not basically defined. The customized mistakes dealing with used to be tricky to understand.
The tree keep watch over view used to be initialized utilizing an xml constitution. The OnTreeNodePopulate occasion used to be want a pattern code demonstration. I create a treenode referred to as which rather a lot the kids nodes on call for utilizing the PopulateOnDemand callback.
The Datalist keep an eye on has a few vital attributes which needs to be attended too: Datakeyfield (Primary Index), Datasource (the Oledb database connection-a AccessDataSource type). ASP.net contains the visible C++ culture of occasion mapping. i have selected to take advantage of OnItemCommand occasion to trap the e.commandname for "Insert","Edit","Update", and "Delete". Insert calls for a distinct regimen of constructing obvious a panel with an enter shape embedded and upon clicking the keep button mapping to the AddNewRecord functionality which creates a insert into sql string and assigns it to the datasource insertcommand characteristic and transacts the dml then resets the enter variable and hides the panel.
ASP.NET System.Data.OleDB (connection, command item) energetic Server Pages. The oledb insurance is extremely ignored within the ASP.NET in a nutshell ebook. I used the web to find how you can open a MS entry oledb connection and execute an replace DML utilizing the oledbcommand object.
Validators have been very curiosity. I create an enter shape has 3 sorts of validation exercises: required validator, customized validator, and variety validator.
If the validation rule isn't met than an customized errors message will seem to the ideal of the textbox. you could strength validation through calling the validator strategy validate. the end result might be back to the calling software via invoking the IsValid procedure. i have used a customary expression to examine for legitimate electronic mail, forex, and different styles. there are many priceless websites for normal expression which are searchable from my web site from "active server pages" query.
ASP.NET Calendar regulate - altering reveal Years - Updating a Textbox with choice - energetic Server Pages I coded a codeset of interplay among a textbox, dropdown combination field, and a calendar. i began by means of populating a drop down combination field with plus and minus two decades from the present yr and choosing the present yr. An occasion handler is outlined for the OnSelectedIndexChanged worth which referred to as "Set_Calendar" eventhandler. "Set_Calendar" occasion handler makes use of the chosen price for 12 months from the drpCalYear keep an eye on to initialize the calendar utilizing the VisibleDate estate of the calendar keep watch over. The autopostback characteristic of the drop down combobox needs to be set to real permitting a postback while index choice swap has happened.
Other subject matters that have been of interest:
Understanding the system.array
Using .net collections
working with arraylists and hashtables
Using the applying object
Using the consultation object
reading and writing cookies
using the question string
understanding VB classes
formating Numbers, dates, and times
Using the datareader
raising occasions and enforce callbacks
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I exploit this ebook as a short reference in desire of a few extra cumbersome books i've got at the subject. i discovered this publication to be extra to the purpose the place it issues XAML, or even extra whole than a few 1400 and 1800 pagers on WPF. The latter appear to skirt on XAML, and the method of piecewise including additional info works good for an academic yet makes it tricky to speedy locate what you would like at the fly.
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Extra resources for ASP.NET in a Nutshell
For example, setting the LCID attribute to 1041 results in FormatCurrency returning values formatted as Japanese yen (¥). ResponseEncoding <%@ Page ResponseEncoding="encodingname" %> Specifies the encoding to be used for the page response. Encoding. The default is Unicode (UTF-8). class" %> Specifies the path to a code-behind class to compile dynamically. This attribute is used in conjunction with the Inherits attribute to specify a code-behind class for the page that will be compiled when the page is requested (unless a cached version of the compiled assembly for the page already exists).
NET runtime. EnableSessionState <%@ Page EnableSessionState="True|False|ReadOnly" %> Specifies whether the page supports session state. This attribute can be used to disable or delay the creation of sessions, which are used for state management. Setting this attribute to False when session state is not utilized can improve the performance of your application. If set to True, code within the page may read or write session values, and if no current session exists for the user, a new Session is created.
NET page. NET class that encapsulates the UI logic. NET class itself. Use the Codebehind attribute if the code-behind file is precompiled; otherwise, use the Src attribute. NET parser. NET parser uses the Src attribute to locate and compile the code-behind class. One of the most commonly used pages in any web application is a sign-in page. NET sign-in page that uses a code-behind file. Note that this example is not designed to show a secure login procedure, but rather to demonstrate the use of code-behind with a Web Forms page.