default.aspx.cs

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using System;
using System.Data;
using System.Configuration;
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;
using System.Data.SqlClient;

public partial class _Default : System.Web.UI.Page
{
    SqlConnection sqlcon;
    string strCon = "Data Source=(local);Database=fangdawei;Uid=sa;Pwd=";
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            string sqlstr = "select * from tb_stu";
            sqlcon = new SqlConnection(strCon);
            SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon);
            DataSet myds = new DataSet();
            sqlcon.Open();
            myda.Fill(myds);
            gvInfo.DataSource = myds;
            gvInfo.DataBind();
            sqlcon.Close();
        }
    }
    protected void btnSel_Click(object sender, EventArgs e)
    {
        string sqlstr = "select * from tb_stu where 学生编号 like '" 
            + txtKey1.Text.ToString() + "%' and (( 学生姓名 like '" 
            + txtKey2.Text.ToString() + "_') or (年龄 like '[^" 
            + txtKey3.Text.ToString() + "][0-9]'))";
        sqlcon = new SqlConnection(strCon);
        SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon);
        DataSet myds = new DataSet();
        sqlcon.Open();
        myda.Fill(myds);
        gvInfo.DataSource = myds;
        gvInfo.DataBind();
        sqlcon.Close();
    }
}