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What is web.config file in asp.net

Posted By :Ashutosh Jha     Posted Date :July 29, 2014    Points :40   Category :ASP.Net 
Web.config is the main settings and configuration file for an ASP.NET web application. The file is an xml document that defines configuration information regarding the web application.This file stores the information about how the web application will act.

You can also find related Interview Question to What is web.config file in asp.net  below: 

what is the use of using web.config file

  
By using this web.config file we can store sqlconnection string.This SqlConnection String can be accessed any where in your application.for security purpose of connection string also we can use web.config. (More...)

Can we have more than one web.config file in our application?

  
Yes,we can create or use more than one web.config file in our application. (More...)

if we remove a web.config file from the application , is this application will work?

  
It Depends on coding if we used something that is required to pioc values from configuration file then its required otherwise we can run our application without web.config. (More...)

Can i add more than 1 web.config file in a single application?

  
Yes, it is possible to add more than 1 web.config file in a single application. (More...)

Is it possible to add multiple Machine.config file?

  
No, it is not possible to add more than 1 machine.config file. if we want to overwrite any setting than that can be achieve with the help of web.config. (More...)

Is it possible to update a connection string stored in the Web.config file programatically? If Yes, then how?

  
Yes.

Create a Configuration object. Then, update the connection string using the ConnectionStrings collection. Finally, call Configuration.Save. (More...)

How do you retrieve the customized properties of a .NET application from XML .config file?

  
Initialize an instance of AppSettingsReader class. Call the GetValue method of AppSettingsReader class, passing in the name of the property and the type expected. Assign the result to the appropriate variable. (More...)

can asp.net website runs without web.config file?

  
Yes, and it will take the default setting from machine.config file from the machine. so web.config file is not necessary or must for running or publishing website or web application. (More...)

How do you retrieve the customized properties of a .NET application from XML .config file?

  
Initialize an instance of AppSettingsReader class. Call the GetValue method of AppSettingsReader class, passing in the name of the property and the type expected. Assign the result to the appropriate variable. (More...)

Can we have more than 1 web.config file?

  
Yes we can have more than 1 web.config but in different folder.
In root we can have only 1 web.config file (More...)

What are the purpose of appsetting in web.config file?

  
We can define user define values and connection string in appsetting. (More...)

Difference Between Web.Config file and Global.asax ?

  
Web.Config file is used ....

1. To specify the application settings
2. To specify the session mechanism available to use for that application.
3. To Specify the Connection strings.
4. To Specify the authentication and authorization.
5. To Specify the http handlers.
6. To Specify different providers.

Global.asax file is used to specify the session and application event handlers.
(More...)

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