default2.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.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;
using System.Data.SqlClient;
using CrystalDecisions.CrystalReports.Engine;
public partial class Default2 : System.Web.UI.Page
{protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            FilLDropDownList();//填冲DropDownList控件
            SqlConnection con = new SqlConnection("server=(local);uid=sa;pwd=;database=db_06");
            con.Open();
            string strSql = "select * from tb_worke";
            SqlDataAdapter da = new SqlDataAdapter(strSql,con);
            DataSet ds = new DataSet();
            da.Fill(ds,"tb_worke");
            con.Close();
            ReportDocument studentsReport = new ReportDocument();//定义ReportDocument类对象
            studentsReport.Load(Server.MapPath("CrystalReport.rpt"));//加载报表
            studentsReport.SetDataSource(ds);//加载数据源
            this.CrystalReportViewer1.ReportSource = studentsReport;//为CrystalReportViewer控件指定报表
        }

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        SqlConnection con = new SqlConnection("server=(local);uid=sa;pwd=;database=db_06");
        con.Open();
        string strSql = "select * from tb_worke where 月份='" + DropDownList1.SelectedValue.ToString() + "'";
        SqlDataAdapter da = new SqlDataAdapter(strSql, con);
        DataSet ds = new DataSet();
        da.Fill(ds, "tb_worke");
        con.Close();
        ReportDocument studentsReport = new ReportDocument();//定义ReportDocument类对象
        studentsReport.Load(Server.MapPath("CrystalReport.rpt"));//加载报表
        studentsReport.SetDataSource(ds);//加载数据源
        this.CrystalReportViewer1.ReportSource = studentsReport;//为CrystalReportViewer控件指定报表
    }

    public void FilLDropDownList()//填冲DropDownList控件
    {
        SqlConnection con = new SqlConnection("server=(local);uid=sa;pwd=;database=db_06");
        con.Open();
        string strSql = "select distinct 月份 from tb_worke";
        SqlCommand com = new SqlCommand(strSql, con);
        SqlDataReader dr = com.ExecuteReader();
        while (dr.Read())
        {
            DateTime dat = Convert.ToDateTime(dr[0].ToString());
            DropDownList1.Items.Add(dat.ToShortDateString());
        }
        dr.Close();
        con.Close();
    }
        
    
    }