done db2

Database2/frmTest.cs

@@ -23,9 +23,70 @@ namespace Database2
 
         private void cboTest_SelectedIndexChanged(object sender, EventArgs e)
         {
+            SqlConnection connString = null;
+            var myStudentID = "";
+            var myQuery = "";
 
+            if (cboTest.IsHandleCreated && cboTest.Focused)
+                try
+                {
+                    //retrieve the student id
+                    myStudentID = cboTest.SelectedValue.ToString().Trim();
+                    myQuery = "SELECT student_id, fname, lname, acct_bal, dob FROM student WHERE student_id = '" +
+                              myStudentID + "'";
 
+                    //create the connection string
+                    connString =
+                        new SqlConnection(
+                            "server=74.37.2.53; initial catalog=College2; connect timeout=30; User ID=admin;Password=password;");
+                    //sql command
+                    var cmdString = new SqlCommand();
 
+                    connString.Open(); //open the connection
+                    //clear any parameters
+                    cmdString.Parameters.Clear();
+                    //link the connection
+                    cmdString.Connection = connString;
+                    //create the command type
+                    cmdString.CommandType = CommandType.Text;
+                    //set the timeout
+                    cmdString.CommandTimeout = 1500;
+                    //set the command text
+                    cmdString.CommandText = myQuery;
+
+                    //adapter and dataset
+                    var adapter = new SqlDataAdapter();
+                    adapter.SelectCommand = cmdString;
+                    var ds = new DataSet();
+                    adapter.Fill(ds);
+
+                    //check to see if any record is returned
+                    if (ds.Tables[0].Rows.Count > 0)
+                    {
+                        dgvStudents.Visible = true;
+                        //get data source
+                        dgvStudents.DataSource = ds.Tables[0];
+                        //adjust aesthetics
+                        dgvStudents.AlternatingRowsDefaultCellStyle.BackColor = Color.LightGreen;
+                        // Set the row and column header styles.
+                        dgvStudents.ColumnHeadersDefaultCellStyle.ForeColor = Color.White;
+                        dgvStudents.ColumnHeadersDefaultCellStyle.BackColor = Color.Green;
+                        dgvStudents.ColumnHeadersDefaultCellStyle.Font = new Font(dgvStudents.Font, FontStyle.Bold);
+                    }
+                    else
+                    {
+                        dgvStudents.Visible = false;
+                    }
+                }
+                catch (Exception ex)
+                {
+                    MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                }
+                finally
+                {
+                    //close the connection
+                    connString.Close();
+                }
         }
 
         private void dgvStudents_CellContentClick(object sender, DataGridViewCellEventArgs e)