Master Pages and ASP. NET AJAX Cby Scott Mitchell. Download Code or Download PDFDiscusses options for using ASP. NET AJAX and master pages. Looks at using the Script. Manager. Proxy class discusses how the various JS files are loaded depending on whether the Script. Manager is used in the Master page or Content page. Introduction. Over the past several years, more and more developers have been building AJAX enabled web applications. An AJAX enabled website uses a number of related web technologies to offer a more responsive user experience. I am retrieving the scopeidentity of a db entry, and I want to use that variable in a different SqlDataSource, primarily as an but I am unable to access the variable. Images/1.png' alt='Sqldatasource Update Parameters Code Behind Pages' title='Sqldatasource Update Parameters Code Behind Pages' />Creating AJAX enabled ASP. NET applications is amazingly easy thanks to Microsofts ASP. NET AJAX framework. ASP. NET AJAX is built into ASP. NET 3. 5 and Visual Studio 2. ASP. NET 2. 0 applications. Here Mudassar Ahmed Khan has explained with an example how to return value from a Stored Procedure in SQL Server. SQL Server allows to return a single integer value. We name one for the calendar to select all entries and one for the FormView to select entries for a particular day, update and insert. Now that we have added. Express Helpline Get answer of your question fast from real experts. Sqldatasource Update Parameters Code Behind Pages' title='Sqldatasource Update Parameters Code Behind Pages' />When building AJAX enabled web pages with the ASP. NET AJAX framework, you must add precisely one Script. Manager control to each and every page that uses the framework. As its name implies, the Script. Manager manages the client side script used in AJAX enabled web pages. At a minimum, the Script. Manager emits HTML that instructs the browser to download the Java. Script files that makeup the ASP. NET AJAX Client Library. It can also be used to register custom Java. Script files, script enabled web services, and custom application service functionality. If your site uses master pages as it should, you do not necessarily need to add a Script. Manager control to every single content page rather, you can add a Script. Manager control to the master page. This tutorial shows how to add the Script. Manager control to the master page. It also looks at how to use the Script. Manager. Proxy control to register custom scripts and script services in a specific content page. Note. This tutorial does not explore designing or building AJAX enabled web applications with the ASP. NET AJAX framework. For more information on using AJAX consult the ASP. NET AJAX videos and tutorials, as well as those resources listed in the Further Reading section at the end of this tutorial. Examining the Markup Emitted by the Script. Manager Control. The Script. Manager control emits markup that instructs the browser to download the Java. Script files that makeup the ASP. NET AJAX Client Library. It also adds a bit of inline Java. Script to the page that initializes this library. The following markup shows the content that is added to the rendered output of a page that includes a Script. Manager control lt script srcASPNETMaster. PagesTutorial0. CSWeb. Resource. T8. EVk. Ss. A8mg. PKu. 7s. BX5w. 2 t6. ASPNETMaster. PagesTutorial0. CSScript. Resource. SCE1. TCh. B2. 4Vk. QIU5a. 8i. JFizu. PBIqs. 6Lka. GEkxo 6. ROKNw. 5LVPCp. Fpm. LFR R pUf. 42. AhmrSKd. 8lwg. ZUWb. PJmf. X0. XH6o. LA5. Q1 t6. 33. 46. 56. Sys undefined throw new ErrorASP. NET Ajax client side framework failed to load. ASPNETMaster. PagesTutorial0. CSScript. Resource. SCE1. TCh. 8B2. 4Vk. QIU5a. 8i. JFizu. PBIqs. 6Lka. 7GEkxo 6. ROKNw. 5LVPCp. Fpm. LFR R ph. T9. 6y. ZPngppi. PVXl. N4. Vz. 2Ru. Vtvw. Di. Qz. F9xt. 42d. UCi. Yj. L0. Uyl. AJoy. Yz. Stwv. Obx. 0U0 t6. Sys. Web. Forms. Page. Request. Manager. Script. Manager. 1, document. Element. By. Idform. Sys. Web. Forms. Page. Request. Manager. Instance. update. Controls, 9. Sys. Application. The lt script srcurl lt script tags instruct the browser to download and execute the Java. Script file at url. The Script. Manager emits three such tags one references the file Web. Resource. axd, while the other two reference the file Script. Resource. axd. These files do not actually exist as files in your website. Instead, when a request for either one of these files arrives at the web server, the ASP. NET engine examines the querystring and returns the appropriate Java. Script content. The script provided by these three external Java. Script files constitute the ASP. NET AJAX frameworks Client Library. The other lt script tags emitted by the Script. Manager include inline script that initializes this library. The external script references and inline script emitted by the Script. Manager are essential for a page that uses the ASP. NET AJAX framework, but is not needed for pages that do not use the framework. Therefore, you might reason that it is ideal to only add a Script. Manager to those pages that use the ASP. NET AJAX framework. And this is sufficient, but if you have many pages that use the framework youll end up adding the Script. Manager control to all pages a repetitive task, to say the least. Alternatively, you can add a Script. Manager to the master page, which then injects this necessary script into all content pages. With this approach, you do not need to remember to add a Script. Manager to a new page that uses the ASP. NET AJAX framework because it is already included by the master page. Step 1 walks through adding a Script. Manager to the master page. Note. If you plan on including AJAX functionality within the user interface of your master page, then you have no choice in the matter you must include the Script. Manager in the master page. One downside of adding the Script. Manager to the master page is that the above script is emitted in every page, regardless of whether its needed. This clearly leads to wasted bandwidth for those pages that have the Script. Manager included via the master page yet dont use any features of the ASP. NET AJAX framework. But just how much bandwidth is wastedThe actual content emitted by the Script. Manager shown above totals a little over 1. KB. The three external script files referenced by the lt script element, however, comprise roughly 4. KB of data uncompressed in a website that uses gzip compression, this total bandwidth can be reduced near 1. KB. However, these script files are cached by the browser for one year, meaning that they only need to be downloaded once and then can be reused in other pages on the site. In the best case, then, when the script files are cached, the total cost is 1. KB, which is negligible. Download Fear 3 Multiplayer Crack Black. In the worst case, however which is when the script files have not yet been downloaded and the web server is not using any form of compression the bandwidth hit is around 4. KB, which can add anywhere from a second or two over a broadband connection to up to a minute for users over dial up modems. The good news is that because the external script files are cached by the browser, this worst case scenario occurs infrequently. Note. If you still feel uncomfortable placing the Script. Manager control in the master page, consider the Web Form the lt form runatserver markup in the master page. Every ASP. NET page that uses the postback model must include precisely one Web Form. Adding a Web Form adds additional content a number of hidden form fields, the lt form tag itself, and, if necessary, a Java. Script function for initiating a postback from script. This markup is unnecessary for pages that dont postback. This extraneous markup could be eliminated by removing the Web Form from the master page and manually adding it to each content page that needs one. However, the benefits of having the Web Form in the master page outweigh the disadvantages from having it added unnecessarily to certain content pages. Step 1 Adding a Script. Manager Control to the Master Page. Every web page that uses the ASP. NET AJAX framework must contain precisely one Script. Manager control. Because of this requirement, it usually makes sense to place a single Script.