Web/Admin/powerAdmin/powerInfo.aspx.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.IO;
public partial class Admin_powerAdmin_powerInfo : basePage
{
    GetPowerPage power = new GetPowerPage();
    Bll.ProwerBll pow = new Bll.ProwerBll();
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            //this.CheckUser();
            GetPower(this.DropDownList1);
        }
    }
    public void GetPower(DropDownList dp)
    {
        DataTable dt = pow.GetProwerAny("select powerID,powerName from tab_powers where powerPID=0");
        dp.DataSource = dt;
        dp.DataTextField = "powerName";
        dp.DataValueField = "powerID";
        dp.DataBind();
        dp.Items.Insert(0, new ListItem("------", "0"));
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        StringBuilder strsel = new StringBuilder();
        strsel.Append("SELECT * FROM [v_power] ");
        strsel.AppendFormat(" where powerName like '{0}'+'%'", this.TextBox1.Text);
        if (this.DropDownList1.SelectedIndex > 0)
        strsel.AppendFormat("and powerPID={0}", this.DropDownList1.SelectedValue);
        this.powDataSource.SelectCommand = strsel.ToString();
        this.powDataSource.DataBind();
        

      
    }
    protected void Button4_Click(object sender, EventArgs e)
    {
        Response.ClearContent();
        Response.AddHeader("content-disposition", "attachment; filename=MyExcelFile.xls");
        Response.ContentType = "application/excel";
        StringWriter sw = new StringWriter();
        HtmlTextWriter htw = new HtmlTextWriter(sw);

        GridView gv = new GridView();

        gv.DataSource = this.powDataSource;
        gv.DataBind();
        gv.RenderControl(htw);
        Response.Write(sw.ToString());