Get (Read) Connectionstring from App.Config File in C#, VB.Net

Introduction:

Here I will explain how to read or get connectionstring from app.config file in c#, vb.net. By using System.Configuration reference we can read or get connectionstring from app.config file in windows or console application in c#, vb.net.

Description:

In previous post I explained encrypt or decrypt connectionstring in app.config file, export datagridview to crystal report in windows application, convert currency or numbers to words in asp.net, angularjs bind dropdownlist with text and value, jQuery tag cloud example in asp.net and many more articles related to asp.net using c#, vb.net. Now I will explain how to read or get connectionstring from app.config file in c#, vb.net.

To read connectionstring from app.config file first create new windows application and open your app.config file and add conneciton string like as shown below

<connectionStrings> <add name="dbconnection" connectionString="DataSource=Suresh;Initial Catalog=Praveendb;Integrated Security=true" providerName="System.Data.SqlClient" /> </connectionStrings>

To read this connectionstring in our windows or console application we need to add System.Configuration reference for that follow below steps

Right click on your References folder à select Add Reference à select .NET tab à in that select System.Configuration à Click OK like as shown below

After completion of adding reference add following namespaces in codebehind

C# Code

using System.Configuration;

VB.NET Code

Imports System.Configuration;

After completion of adding namespaces you need to write the code like as shown below to get connectionstring from app.config file

C# Code

string strcon = ConfigurationManager.ConnectionStrings["dbconnection"].ConnectionString;

VB.NET Code

Dim strcon As String = ConfigurationManager.ConnectionStrings["dbconnection"].ConnectionString;

I hope it helps you to read connectionstring from app.config file…. Happy coding…

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