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Validating numeric textbox in vb net

validating numeric textbox in vb net-54

If I update session state then should I lock it, too? By locking application state before updating it and unlocking it afterwards, you ensure that another request being processed on another thread doesn't read application state at exactly the wrong time and see an inconsistent view of it.

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The controls can bubble up their event handlers, allowing the main Data Grid event handler to take care of its constituents. NET function executed on Mouse Over over a certain button. It's the Attributes property, the Add function of that property. Caching Output Caching: Caches the dynamic output generated by a request. Go back to Dbg Clr, choose "Debug Processes" from the Tools menu, and select "aspnet_wp.exe" from the list of processes. NET can detect when a form is requested for the first time versus when the form is posted (sent to the server), that allows you to program accordingly. Custom controls A control authored by a user or a third-party software vendor that does not belong to the . This is a generic term that includes user controls. So a stolen session cookie can only be used in replay attacks as long as the ticket inside the cookie is valid. You can change that by modifying the timeout attribute accompanying the element in the Machine.config or a local Web.config file. Mail Message and Smtp Mail are classes defined in the . A client who requests a VSDISCO file gets back what appears to be a static DISCO document. However, Microsoft is actively discouraging the use of VSDISCO files because they could represent a threat to Web server security. A custom client control is used in Windows Forms applications. NET: A user-authored server control that enables an ASP. Authentication cookies issued as session cookies, do, however, include a time-out valid that limits their lifetime. If you place the following VSDISCO file in a directory on your Web server, for example then it returns references to all ASMX and DISCO files in the host directory and any subdirectories not noted in How does dynamic discovery work? NET maps the file name extension VSDISCO to an HTTP handler that scans the host directory and subdirectories for ASMX and DISCO files and returns a dynamically generated DISCO document. Discovery Request Handler and granting the ASPNET user account permission to read the IIS metabase. If the user is working with a browser that supports DHTML then the validation controls can also perform validation using a client script. Session state is locked down when the Http Application instance that's processing the request fires an Acquire Request State event and unlocked when it fires a Release Request State event. NET forms authentication cookies provide any protection against replay attacks? Validation controls perform input checking in server code. One, it's unlikely that two requests from the same user will overlap. NET locks down session state during request processing so that two threads can't touch it at once. The latter positions script blocks near the end of the document so elements on the page that the script interacts with are loaded before the script runs.

Page Where do you store the information about the user's locale? You can modify it by editing Machine.config or including a section in a local Web.config file. In other words, code that's to execute when the page is loaded.

Server-side scripting means that all the script will be executed by the server and interpreted as needed.

ASP doesn't have some of the functionality like sockets, uploading, and so on.

Client-side scripting is usually done in VBScript or Java Script. In earlier versions of IIS, if we wanted to send a user to a new Web page then the only option we had was Response. While this method does accomplish our goal, it has several important drawbacks.

Download time, browser compatibility, and visible code, since Java Script and VBScript code is included in the HTML page, then anyone can see the code by viewing the page source. Web Forms are the User Interface (UI) elements that provide your Web applications their look and feel. The biggest problem is that this method causes each page to be treated as a separate transaction. Second, you lose access to all of the properties in the Request object. It does this by performing the transfer on the server without requiring a roundtrip to the client.

Do not set Asp Compat to true if your page uses no COM objects or if it uses COM objects that don't access ASP intrinsic objects and that are registered Threading Model=Free or Threading Model=Both.