CNSA-212-Personal/Database3/frmSearch.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.VisualBasic;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Data.SqlClient;
using Database3;


namespace Database3
{
    public partial class frmSearch : Form
    {
        public frmSearch()
        {
            InitializeComponent();
        }

        private void btnSearch_Click(object sender, EventArgs e)
        {
            string studentid = "9999999999";
            string lname = "9999999999";
            DateTime dob = new DateTime(1/1/1111);

            ErrorProvider ep1 = new ErrorProvider();
            
            try
            {
                DataSet ds = new DataSet();
                StudentDataTier stuDT = new StudentDataTier();


                    studentid = txtStuID.Text;
                    lname = txtlname.Text;
                try
                {
                    dob = DateTime.Parse(txtDOB.Text);

                }
                catch (Exception exception)
                {
                    ep1.SetError(txtDOB, "Non valid value, but that's ok");
                }

                if (string.IsNullOrWhiteSpace(txtStuID.Text) &&
                    string.IsNullOrWhiteSpace(txtlname.Text) &&
                    string.IsNullOrWhiteSpace(txtDOB.Text))
                {
                    throw new Exception("Must Enter at least one value");
                }
                
                // Get the dataset using all three search parameters.
                ds = stuDT.GetStudents(studentid, lname, dob);

                // Check to see if any record is returned.
                if (ds.Tables[0].Rows.Count > 0) // There is a record.
                {
                    dgvStudents.Visible = true;
                    // Get data source.
                    dgvStudents.DataSource = ds.Tables[0];
                    dgvStudents.AlternatingRowsDefaultCellStyle.BackColor = Color.LightGreen;

                    // Set the row and column header styles.
                    dgvStudents.ColumnHeadersDefaultCellStyle.ForeColor = Color.White;
                    dgvStudents.ColumnHeadersDefaultCellStyle.BackColor = Color.Green;
                }
                else
                {
                    dgvStudents.Visible = false; // Hide the DataGridView if no results are found.
                    MessageBox.Show("No records found.");
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show($"An error occurred: {ex.Message}");
            }
        }
        }

    }