Error in connectivity

Question

hello!

 

 am getting this error in select operation (button click event)

Cannot open database "SignUp" requested by the login. The login failed.
Login failed for user 'ABC\abhishekj'.

 

Line 29:         string strcon = ConfigurationManager.ConnectionStrings["connection"].ConnectionString; 
Line 30:         SqlConnection con = new SqlConnection(strcon);        
Line 31:         con.Open(); 
Line 32:         SqlCommand cmd = new SqlCommand("SELECT * FROM SignUp", con); 
Line 33:         DataSet ds = new DataSet("SignUpDataSet");

Please tell me, How to resolve it.