default.aspx.cs

这是asp.net^和Visual C++Sharp编写的串并口通讯的书籍 源代码

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 
{
    protected void Page_Load(object sender, EventArgs e)
    {
            SqlConnection con = new SqlConnection("Server=(Local);user id=sa;pwd=;DataBase=mrdb");
            con.Open();
            SqlDataAdapter ada = new SqlDataAdapter("select * from tb_12", con);
            DataSet ds = new DataSet();
            ada.Fill(ds);
            GridView1.DataSource = ds;
            GridView1.DataBind();
            con.Close();
    }

    //自定义一个GetDataSet方法，返回DataSet数据集
    public DataSet GetDataSet(string sqlstr)
    {
        SqlConnection con = new SqlConnection("Server=(Local);user id=sa;pwd=;DataBase=mrdb");
        con.Open();
        SqlCommand com = new SqlCommand(sqlstr,con);
        com.ExecuteNonQuery();
        SqlDataAdapter ada = new SqlDataAdapter("select * from tb_12", con);
        DataSet ds = new DataSet();
        ada.Fill(ds);
        con.Close();
        return ds;
    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        if (DropDownList1.Text == "打榜次数")
        {
            try
            {
                string sqlstr1 = "delete from tb_12 where age='" + TextBox1.Text + "'";
                GridView1.DataSource = GetDataSet(sqlstr1).Tables[0].DefaultView;
                GridView1.DataBind();
                Response.Write("<script language=javascript>alert('删除成功!')</script>");
            }
            catch 
            {
                Response.Write("<script language=javascript>alert('不可批量删除,你每次只能删除一条记录!')</script>");

            }
        }
       
        if (DropDownList1.Text == "人气指数")
        {
           try
           {
            string sqlstr2 = "delete from tb_12 where zhishu='" + TextBox1.Text + "'";
            GetDataSet(sqlstr2);
            GridView1.DataSource = GetDataSet(sqlstr2).Tables[0].DefaultView;
            GridView1.DataBind();
            Response.Write("<script language=javascript>alert('删除成功!')</script>");
            }
            catch
            {
                Response.Write("<script language=javascript>alert('不可批量删除,你每次只能删除一条记录!')</script>");
            }
        }
    }
    protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        GridView1.PageIndex = e.NewPageIndex;
        GridView1.DataBind();
    }
   
}