{"id":1138,"date":"2010-09-19T20:48:10","date_gmt":"2010-09-19T15:18:10","guid":{"rendered":"http:\/\/JitendraZaa.com\/blog\/?p=1138"},"modified":"2010-09-19T20:48:10","modified_gmt":"2010-09-19T15:18:10","slug":"how-to-read-value-from-configuration-file-app-config-or-web-config","status":"publish","type":"post","link":"https:\/\/www.jitendrazaa.com\/blog\/microsoft\/net\/how-to-read-value-from-configuration-file-app-config-or-web-config\/","title":{"rendered":"How to read value from Configuration file – ( app.config or web.config )"},"content":{"rendered":"

One of the best practice used in .NET application is to store the constants like Database connection in app.config <\/strong>in case of dll or standalone application or web.config <\/strong>in case of websites.<\/p>\n

To achieve this, we have to follow below steps:<\/p>\n

\"add<\/a>
add reference of System.Configuration in .NET<\/figcaption><\/figure>\n

Lets consider below code in web.config<\/strong><\/p>\n

<\/span><\/p>\n

\n<appSettings>\n    <add key="ConnectionString" value="Data Source=SHIVASOFTSHIVASOFT;Initial Catalog=testDb;\nIntegrated Security=True"\/>\n  <\/appSettings>\n<\/pre>\n
So, to read the key ConnectionString<\/strong>, we have to use below code in C#.<\/p>\n
\nString dbConnection = System.Configuration.ConfigurationManager.\nAppSettings["ConnectionString"];\n<\/pre>\n
Where “ConnectionString<\/span><\/strong>” is the key present in web.config <\/strong>or app.config.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"
How to read value from Configuration file –  app.config or web.config in C# application or web application<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"jz_research_post":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[21,22],"tags":[43],"class_list":["post-1138","post","type-post","status-publish","format-standard","hentry","category-net","category-csharp","tag-asp-net"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":258,"url":"https:\/\/www.jitendrazaa.com\/blog\/microsoft\/net\/tracing-asp-net-website\/","url_meta":{"origin":1138,"position":0},"title":"Tracing ASP.NET Website","author":"Jitendra","date":"June 28, 2010","format":false,"excerpt":"Demonstrates that how to Trace ASP.NET web applications","rel":"","context":"In "ASP.NET"","block_context":{"text":"ASP.NET","link":"https:\/\/www.jitendrazaa.com\/blog\/category\/microsoft\/net\/"},"img":{"alt_text":"ASP.NET Tracing Output","src":"https:\/\/i0.wp.com\/jitendrazaa.com\/blog\/wp-content\/uploads\/2010\/05\/Tracing-FirstPage1.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":125,"url":"https:\/\/www.jitendrazaa.com\/blog\/microsoft\/net\/cannot-access-a-closed-file-fileupload-in-asp-net\/","url_meta":{"origin":1138,"position":1},"title":"cannot access a closed file – FileUpload in ASP.NET","author":"Jitendra","date":"May 13, 2010","format":false,"excerpt":"This was very\u00a0interesting\u00a0error, i got during development of file upload control in ASP.NET. On my local system, every thing was just fine. but when i deployed my application on development server, my control was able to upload only small size files. whenever i tried to upload large size file i\u2026","rel":"","context":"In "ASP.NET"","block_context":{"text":"ASP.NET","link":"https:\/\/www.jitendrazaa.com\/blog\/category\/microsoft\/net\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":132,"url":"https:\/\/www.jitendrazaa.com\/blog\/microsoft\/net\/upload-files-in-asp-net-at-production-server\/","url_meta":{"origin":1138,"position":2},"title":"Upload Files in ASP.NET at Production server","author":"Jitendra","date":"May 13, 2010","format":false,"excerpt":"In this article, i am going to demonstrate that how to upload the file in ASP.NET production server. Most of the case, a developer created a code to upload the file and test it on his local machine. program runs smoothly, but as he\u00a0forward\u00a0the same code on production. He\u00a0stuck\u00a0in the\u2026","rel":"","context":"In "ASP.NET"","block_context":{"text":"ASP.NET","link":"https:\/\/www.jitendrazaa.com\/blog\/category\/microsoft\/net\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/jitendrazaa.com\/blog\/wp-content\/uploads\/2010\/05\/WebShare-Folder.png?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":1029,"url":"https:\/\/www.jitendrazaa.com\/blog\/microsoft\/logging-made-easy-in-net-log-4-net\/","url_meta":{"origin":1138,"position":3},"title":"Logging made easy in .NET – log 4 net","author":"Jitendra","date":"September 30, 2010","format":false,"excerpt":"How to use the log 4 net in .Net application. 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