新手gridview问题
asp新手作网页查询
代码如下:
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class maintain : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (TextBox1.Text != "") return;
TextBox1.Text = DateTime.Now.ToShortDateString();
TextBox2.Text = DateTime.Now.ToShortDateString();
}
protected void Button1_Click(object sender, EventArgs e)
{
String sql;
sql = "SELECT m_id, convert(varchar,datepart(year,m_maintaindate))+'年'+right('0'+convert(varchar,datepart(month,m_maintaindate)),2)+'月'+right('0'+convert(varchar,datepart(day,m_maintaindate)),2)+'日' as maintaindate, m_department, m_line, m_linekind, m_workarea, m_workleader, m_protect, m_worknum, m_casuallaborernum, m_implement, m_implementuser, m_workplace, m_task, m_num, m_stationprotect, m_ifclearstory, m_station, m_time, m_timeunit, m_sysdatetime, m_deptid FROM t_maintain WHERE (m_ifclearstory = '0')";
if (CheckBox1.Checked)
{
sql = sql + " and m_department='" + DropDownList1 .Text + "'";
}
if (CheckBox2.Checked)
{
try
{
DateTime.Parse(TextBox1.Text);
DateTime.Parse(TextBox2.Text);
}
catch
{
// 转化
Response.Write("<script language=javascript>alert('请输入正确的日期格式!');</script>");
return;
}
sql = sql + " and m_maintaindate between '" + TextBox1.Text + " 00:00:00' and '" + TextBox2.Text + " 23:59:59'";
}
sql = sql + " order by maintaindate desc";
this.SqlDataSource.SelectCommand = sql;
this.GridView1.DataBind();
}
}
查询后gridview的第一页没有问题,但是只要一点gridview上面的分页,gridview显示的数据就又回到查询以前的数据了,请高手指教!