To add a connection string in Web.config

web| String | string

The files in Web.config are as follows:

<?xml version= "1.0" encoding= "Utf-8"?>
<configuration>
<appSettings>
<add key= "constring" value= "integrated, Security=sspi;data source=localhost;initial catalog= Educational administration system"/>
</appSettings>

<system.web>

。。。。。。。。。

</system.web>

</configuration>

Visit the following:

Private Sub Page_Load (ByVal sender as System.Object, ByVal e as System.EventArgs) Handles MyBase.Load
' The user code to place the initialization page here
If not IsPostBack Then
Dim str as String = configurationsettings.appsettings ("constring")
Dim con as New sqlclient.sqlconnection (str)
Da. SelectCommand.Connection = Con
Da. Fill (Daset, "Course Information")
Dagrid. DataSource = Daset. Tables ("Course Information")
Dagrid. DataBind ()
End If
End Sub