Part 1 How to retrieve data from different databases in asp net HD

Link for all dot net and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists Link for slides, code samples and text version of the video http://csharp-video-tutorials.blogspot.com/2014/05/part-1-how-to-retrieve-data-from.html Several of our youtube channel subscribers faced this question in a dot net written test. We have 2 databases 1. USADB - Contains Employees table that stores only US Employees 2. UKDB - Contains Employees table that stores only UK Employees Implement an asp.net web page that retrieves data from the Employees table both from USADB and UKDB databases. Add a webform to the project. Drag and drop a GridView control on the webform. Copy and paste the following code in the code-behind file. using System; using System.Configuration; using System.Data; using System.Data.SqlClient; namespace Demo { public partial class WebForm1 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { string USADBCS = ConfigurationManager.ConnectionStrings["USADB"].ConnectionString; string UKDBCS = ConfigurationManager.ConnectionStrings["UKDB"].ConnectionString; SqlConnection con = new SqlConnection(USADBCS); SqlDataAdapter da = new SqlDataAdapter("select * from Employees", con); DataSet ds1 = new DataSet(); da.Fill(ds1); con = new SqlConnection(UKDBCS); da.SelectCommand.Connection = con; DataSet ds2 = new DataSet(); da.Fill(ds2); ds1.Merge(ds2); Gridview1.DataSource = ds1; Gridview1.DataBind(); } } }