using System;
using System.Data;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
namespace 酒店信息管理3
{
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
}
SqlConnection conn;
private void button2_Click(object sender, EventArgs e)
{
string queryString = "select count(*)as stuNum from GuestInfo";
string connectionString = "server = localhost; database = HotelManage; Integrated Security = True; ";
using (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand command = new SqlCommand(queryString, connection);
connection.Open();
SqlDataReader reader = command.ExecuteReader();
try
{
while (reader.Read())
{
int zh = 0;
zh = Convert.ToInt32(reader["stuNum"]); //强制数据转换
label4.Text = "数据表中共有:" + zh.ToString() + "条数据";
}
}
finally
{
// Always call Close when done reading.
reader.Close();
}
}
}
}
}
using System.Data;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
namespace 酒店信息管理3
{
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
}
SqlConnection conn;
private void button2_Click(object sender, EventArgs e)
{
string queryString = "select count(*)as stuNum from GuestInfo";
string connectionString = "server = localhost; database = HotelManage; Integrated Security = True; ";
using (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand command = new SqlCommand(queryString, connection);
connection.Open();
SqlDataReader reader = command.ExecuteReader();
try
{
while (reader.Read())
{
int zh = 0;
zh = Convert.ToInt32(reader["stuNum"]); //强制数据转换
label4.Text = "数据表中共有:" + zh.ToString() + "条数据";
}
}
finally
{
// Always call Close when done reading.
reader.Close();
}
}
}
}
}