web.config详解（web.config详解）.doc

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First, recognize the file
file is an XML text file, its configuration information used to store the Web application (authentication application settings Web as the mon), it can appear in every directory of the application. When you create a Web through application, by default will automatically create a default file in the root directory, including the default configuration settings, all subdirectories inherit its configuration settings. If you want to modify the configuration settings of the subdirectory, you can create a new file in the subdirectory. It provides configuration information other than the configuration information inherited from the parent directory, as well as rewriting or modifying the settings defined in the parent directory.
(1). is in the XML file storage specification, configuration file is divided into the following format
1. configuration section handler declaration
Features: at the top of the configuration file included in the <configSections> logo.
2. specific application configuration
Features: located in <appSetting>. Can set the information such as global constants that define the application.
3. configuration section settings
Features: located in the <> section, the runtime behavior.
4. configuration section group
Features: with <sectionGroup> tags, you can customize the grouping, and you can put it inside the <configSections> or other <sectionGroup> Tags
(two) each section of the configuration section
1.<configuration> Festival
The root element, the other nodes, is in its interior
2.<appSetting> Festival
This section is used to define application settings. Some of the uncertainty set, can also allow users to set their own according to their actual situation
Usage:
I.
<appSettings>
<add key= "Conntction" value= "server=; userid=sa; password=; database=Info;"
<appSettings>
A connection string constant is defin