using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;

namespace 多條件查詢
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btnSearch_Click(object sender, EventArgs e)
        {
            int id = Convert.ToInt32(cboSearchClass.SelectedItem);
            string name = txtSearchName.Text;
            string geder = cboSearchGender.SelectedItem!=null? cboSearchGender.SelectedItem.ToString():null;
            bool hasdate = chkIsByDate.Checked;

           
           MessageBox.Show(GetSearchStudents(id,name,geder));
        }
        public string GetSearchStudents(int cid, string name, string sex)
        {
            string sql = "select * from v_Students where PIsDel=0 and pType=1";
            List<Person> students = new List<Person>();
            List<SqlParameter> list = new List<SqlParameter>();//存引數
            //站著埋
            if (cid != -1)
            {
                sql += " and 
 
[email protected]";
                list.Add(new SqlParameter("@cid", cid));
            }
            if (!string.IsNullOrEmpty(name))
            {
                sql += " and PCName like @name";
                list.Add(new SqlParameter("@name", "%" + name + "%"));
            }
            if (!string.IsNullOrEmpty(sex) && sex != "不限")
            {
                sql += " and 
 
[email protected]";
                list.Add(new SqlParameter("@sex", sex));
            }
          



            return sql;

        }
    }
}