Know the web.config file

Know the web.config file

The web.config file is an XML text file that is used to store configuration information for the ASP.NET web application (such as the most commonly used setting ASP.NET web application authentication mode), which can appear in every one of the application. Directory. When you create a new web application through .NET, you will automatically create a default web.config file in the root directory by default, including the default configuration settings, all subdirectories inherit it. If you want to modify the configuration settings for the subdirectories, you can create a new web.config file in the subdirectory. It provides configuration information other than configuration information inherited from the parent directory, or modifies the settings defined in the parent directory.

You can take effect on the modification of the web.config file at runtime. You can take effect (Note: section). Of course, the web.config file can be expanded. You can customize the new configuration parameters and write a configuration segment process program to process them.

Web.config file details

Web.config configuration file (default configuration settings) All of the following items should be located

and

This XML tag is omitted between the examples below for the purpose of learning.

1, : Configuring ASP.NET Authentication Support (Four of Windows, Forms, Passport, None). This element can only be declared at a computer, site, or application level. Elements must be used in combination with . Example: The following example is a Forms-based authentication configuration site that automatically jumps to the login web page when the user who does not log in is accessible.

Note: You can use user.Identity.name to get the current username that has been verified; you can use the web.security.formloginpage method to redirect the verified user to the page just requested. For details, please refer to : Forms Verification http://www.fanvb.net/websample/dataAuth.aspx

3, : Configuring all compilation settings used by ASP.NET. The default debug property is "true". It should be set to false after the program compilation completion delivery is used, and the example is omitted here)

4, Role: Provides information about custom error messages for the ASP.NET application. It does not apply to errors that have occurred in XML Web Services. Example: When an error occurs, jump to the custom error page when an error occurs.

The element DEFAULTREDIRECT represents the name of the custom error page. Mode element indicates that the user who is not running on the local web server displays custom (friendly) information.

5, : Configure the ASP.NET HTTP runtime settings. This section can be declared at your computer, site, application, and subdirectories. Example: Controling the user upload file up to 4m, the maximum time is 60 seconds, the maximum number of requests is 100

6, Role: Identify the configuration settings specific to the page (if you enable the session state, the view status, whether the user's input is detected). You can declare on your computer, site, application, and subdirectories. Example: Does not detect whether there is potential hazard data in the content entered in the browser (Note: This item is detected, if you use no detection, one to encode or verify the user's input), from the client The encrypted view status will be checked when the page is sent to verify that the view status is tampered with at the client. (Note: This item is not verified by default)

7, Role: Configure session status settings for the current application (such as setting whether or not to enable session status, session status save location). Example:

Note: Mode = "inproc" means: store session status locally (you can also choose to store or do not enable session status) cookieless = "true" means: If the user browser does not support cookie, enable session Status (default is false) Timeout = "20" means: the session can be in the number of minutes in idle state

8, Role: Configure the ASP.NET Tracking Service, which is mainly used to make an error. Example: The following is the default configuration in Web.config:

Note: Enabled = "false" means not enable tracking; RequestLimit = "10" indicates that the number of trace requests specifying the trace requests stored on the server will use only by tracking utility access tracking output; TraceMode = "sortbytime" means Display the tracking information locaalonly = "true" indicates that the trace viewer is only used for the host web server custom web.config file configuration.

Custom Web.config file configuration section is divided into two steps. 1. Declare the name of the configuration section between the tag of the configuration file and the name of the .NET Framework class that processes the configuration data in this section. 2. It is the actual configuration setting for the declaration after the area. Example: Create a section storage database connection string