using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;namespace personmanagement
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }        private void Form1_Load(object sender, EventArgs e)
        {
            
        }        private void groupBox1_Enter(object sender, EventArgs e)
        {        }        private void label1_Click(object sender, EventArgs e)
        {        }        private void button1_Click(object sender, EventArgs e)
        {
            Form2 f2 = new Form2();
            f2.showDialog();
        }        private void groupBox2_Enter(object sender, EventArgs e)
        {        }        private void button6_Click(object sender, EventArgs e)
        {
            Form6 f6 = new Form6();
            f6.showDialog();
        }        private void button2_Click(object sender, EventArgs e)
        {
            Form5 f5 = new Form5();
            f5.showDialog();
        }        private void button3_Click(object sender, EventArgs e)
        {
            Form3 f3 = new Form3();
            f3.showDialog();
        }        private void button4_Click(object sender, EventArgs e)
        {
            Form4 f4 = new Form4();
            f4.showDialog();
        }        private void button7_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }
        private string myConnectionString = @"Data Source=.;Initial Catalog=personmanagement;Integrated Security=True";
        private void button5_Click(object sender, EventArgs e)
        {
            OledbConnection cnn = new OledbConnection(myConnectionString);
            cnn.Open();
            string sql ="select 性别,cout(*) as 数量 from person group by 性别";
            OledbConnection cmd = new OledbConnection(sql,cnn);
            cmd.CommandType=CommandType.Text;
           OledbConnection odr= cmd.ExecuteReader();
            odr.Read();
            string m1=odr[0].ToString();
            string m1_count=odr[1].ToString();
            odr.Read();
            string m2=odr[0].ToString();
            string m2_count=odr[1].ToString();
            odr.Close();
            string display = string.Format
            ("{0} 人数; {1}\n\n{2} 人数: {3}",m1,m1_count,m2,m2_count);
               MessageBox.Show (display,"统计性别");
         }
        }
    }
}
提示错误1应输入类型、命名空间定义或文件尾??