moudle/ascx/Cha.ascx.cs

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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.Text;
using System.Data.SqlClient;
//该源码下载自www.51aspx.com(５１ａｓｐｘ．ｃｏｍ)


public partial class moudle_ascx_Cha : System.Web.UI.UserControl
{
    protected void Page_Load(object sender, EventArgs e)
    {


        this.DropDownList3.Visible = false;
        this.TextBox1.Visible = false;
        this.TextBox2.Visible = false;
        this.TextBox3.Visible = false;
        this.Label1.Visible = false;
        this.Label2.Visible = false;
        this.Label3.Visible = false;

    }

    protected void DropDownList2_SelectedIndexChanged1(object sender, EventArgs e)
    {
        this.Label1.Text = "";
        this.Label2.Text = "";
        this.Label3.Text = "";
        SqlData sd = new SqlData();


        if (DropDownList2.SelectedValue.ToString() == "all")
        {
            this.Label3.Visible = false;
            this.DropDownList3.Visible = false;
            this.TextBox1.Visible = false;
            this.TextBox2.Visible = false;
            this.TextBox3.Visible = false;
            this.Label1.Visible = false;
            this.Label2.Visible = false;


        }
        else if (DropDownList2.SelectedValue.ToString() == "xl" || DropDownList2.SelectedValue.ToString() == "xl1")
        {
            if (DropDownList2.SelectedItem.ToString() == "按商品统计")
            {
                this.Label3.Text = "商品";

                SqlDataReader sdr = sd.ExceRead("select k_name from gy_KName");

                this.DropDownList3.DataSource = sdr;