How can I create DATABASE in SQL server 2012 using stored procedure in C#? Asp.net (web)

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C#

ASP.NET

SQL-Server

Hi.I'm trying to create database using c# asp.net,but I can't.Can any one help me here.

What I have tried:

Here is my c# asp.net program it's execute well and data store in database table but database is not creating.Kindly tell me stored procedure that how can i create database using stored procedure so that i pass value through program and database will be created in database using stored procedure.here i try,it is not through stored procedure,kindly tell me stored procedure or correct this one.

 public void create(PropertyService p)
    {
        cnn.Open();
        cmd2 = new SqlCommand("SELECT User_ID FROM tbl_user WHERE User_Name='" + p.userDB + "'", cnn);
        string id = cmd2.ExecuteScalar().ToString();
        int ID = Int32.Parse(id);
        cmd = new SqlCommand("createDB", cnn);
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.Parameters.AddWithValue("@DbName", p.dbname);
        string str;
        
            str = "CREATE DATABASE '" + p.dbname + "' ON PRIMARY"
    + "(Name= '" + p.dbname + "', filename = 'C:\\mysql\\ '" + p.dbname + "'.mdf', size=3,"
    + "maxsize=5, filegrowth=10%)log on"
    + "(name= '" + p.dbname + "', filename='C:\\mysql\\ '" + p.dbname + "'.ldf',size=3,"
    + "maxsize=20,filegrowth=1)";
            SqlCommand myCommand = new SqlCommand(str, cnn);
            cmd.Parameters.AddWithValue("@Description", p.description);
            cmd.Parameters.AddWithValue("@Date", p.dbdate);
            cmd.Parameters.AddWithValue("@user", ID);
            cmd.ExecuteNonQuery();
            cmd2.ExecuteNonQuery();
            myCommand.ExecuteNonQuery();
            cnn.Close();
        
        
      

    }
}

connection string etc define above,every thing is working fine but issue is database.thanks