DateTime date1;
DateTime date2;
string dt1, dt2;
int dt3, dt4;
private void dateTimePicker1_ValueChanged(object sender, EventArgs e)
{
date1 = dateTimePicker1.Value;
dt1 = dateTimePicker1.Text;
}
private void dateTimePicker2_ValueChanged(object sender, EventArgs e)
{
//date2 = dateTimePicker2.Value;
dt2 = dateTimePicker2.Text;
}
private void button2_Click(object sender, EventArgs e)
{
SqlConnection Conn = new SqlConnection();
Conn.ConnectionString = "server=LAPTOP-HPPFDM96\\SQLEXPRESS;database=db_zunyioven ;uid=zunyi;pwd=222";
//Conn.ConnectionString = "server=DESKTOP-5RTJQL1;database=db_zunyioven ;uid=sa;pwd=222";
//onn.Open();
String sql_str = "Select * from dbo.tb_1 where date between '" + dt1+ "' and '" + dt2 + "'";
//String sql_str = "Select * from dbo.tb_1 where date between '" + date1 + "' and '" + date2 + "'" ;
//select* from LoginLog where loginTime between '" + dateTimePicker1.Text + "' and '" + dateTimePicker2.Text + "'"
textBox1.Text = sql_str;
MessageBox.Show(dt1);
MessageBox.Show(dt2);
SqlDataAdapter da = new SqlDataAdapter(sql_str, Conn);
DataSet ds = new DataSet();
da.Fill(ds,"dbo.tb_1");
dataGridView1.DataSource = ds.Tables["dbo.tb_1"];
}
```我用SQLSERVER创建了一个表格，列是id,datetime,name. C#连接好后，用select* from LoginLog where loginTime between '" + dateTimePicker1.Text + "' and '" + dateTimePicker2.Text + "'" 查询，数据库不显示，查idn和ame都正常，请指教。谢谢！
