Accessing app.config in ASP.NET

Question

I am using app.config file to read data from it.. I am loading the app.config file as:

string app_path = HttpContext.Current.Server.MapPath("app.config");
xmlDoc.Load(app_path);

string image_path = ConfigurationManager.AppSettings["Test1"];

and i want to get the value of "Test1". But the value of test1 is comming "null".. how can i get the value of "test1" from app.config file.. i created the app.config file as:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <appSettings>
    <add key="Test1" value="My value 1" />
    <add key="Test2" value="Another value 2" />
  </appSettings>
</configuration>

please help me out..

There is no app.config in asp.net, you need to use web.config instead. — Waqas Raja
– Waqas Raja, Commented May 13, 2011 at 9:17
If you're running ASP.NET you need to use Web.config, not App.config — abatishchev
– abatishchev, Commented May 13, 2011 at 9:17
Anyway, don't load web.config/app.config as XmlDocument. Use built-in infrastructure members instead. — abatishchev
– abatishchev, Commented May 13, 2011 at 9:18

abatishchev · Accepted Answer · 2011-05-13 09:19:00Z

10

Web.config:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <appSettings>
    <add key="Test1" value="My value 1" />
    <add key="Test2" value="Another value 2" />
  </appSettings>
</configuration>

Code:

string image_path = ConfigurationManager.AppSettings["Test1"];

answered May 13, 2011 at 9:19

abatishchev

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5 Comments

J. Steen Over a year ago

Yes, but in an ASP.NET application, you have to use the web.config file, not the app.config file.

percy Over a year ago

yes i have used web.config and rename it to app.config file. is this possible....

J. Steen Over a year ago

No. It needs to be named WEB.CONFIG. The .net configuration environment uses a set of conventions where files need to be named certain things for the ConfigurationManager to work.

percy Over a year ago

but i get from certain website that app.config is used to do some personel settings in .config file

abatishchev Over a year ago

@percy: In ASP.NET, default config is called Web.config, any other - is custom and optional. So you can name it App.config (like in WinForms) or anyhow else, Foo.config or Config\Bar.config. Custom loader (ConfigurationManager.OpenExeConfiguration()) is required to load and read such file.

J. Steen · Accepted Answer · 2011-05-13 09:43:58Z

6

In ASP.NET applications, the default configuration file is named web.config. This is a convention you should probably stick to, that allows you to easily use the ConfigurationManager to access configuration settings.

I suggest having a look at http://en.wikipedia.org/wiki/Web.config as a starting point to learn the ins and outs of basic .NET application configuration in the ASP.NET domain.

You can link configuration files together, by setting the file attribute of configuration sections you want to override: http://www.codeproject.com/KB/dotnet/appsettings_fileattribute.aspx

edited May 13, 2011 at 9:43

answered May 13, 2011 at 9:29

J. Steen

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1 Comment

percy Over a year ago

if i had to use some personel setting then i have to give it in web.config file, inside "<appsettings>".

mathieu · Accepted Answer · 2011-05-13 09:17:48Z

1

If you want to use ConfigurationManager.AppSettings inside a web application, you have to put your AppSettings section in web.config.

answered May 13, 2011 at 9:17

mathieu

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