adminguestbook.aspx.cs

学生寝室管理系统

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;
public partial class adminguestbook : System.Web.UI.Page
{
    SqlCommand cmd, cmd1;
    SqlConnection cn;
    string strsql;
    SqlDataAdapter da;
    DataSet ds = new DataSet();
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!this.IsPostBack)
        {
            this.databindlist();
            if (Session["adminname"] == null)
            {
                Response.Redirect("index.aspx");
            }
        }
    }
    public void databindlist()
    {

        cn = sqldata.createcon();
        cn.Open();
        int countpage = Convert.ToInt32(this.Labelye.Text);
        strsql = "select * from guestbook  order by id desc ";
        da = new SqlDataAdapter(strsql, cn);
        da.Fill(ds, "Result");
        System.Web.UI.WebControls.PagedDataSource ps = new PagedDataSource();
        ps.DataSource = ds.Tables["Result"].DefaultView;
        ps.AllowPaging = true;
        ps.PageSize = 6;
        ps.CurrentPageIndex = countpage - 1;
        this.lblPageCount.Text = Convert.ToString(ps.PageCount);

        this.Button1.Enabled = true;
        this.Button2.Enabled = true;

        if (countpage == 1)
        {
            this.Button1.Enabled = false;
        }
        if (countpage == ps.PageCount)
        {
            this.Button2.Enabled = false;
        }

        this.mydatalist.DataSource = ps;
        this.mydatalist.DataBind();

        SqlCommand cmd1 = new SqlCommand("select count(*) from guestbook", cn);
        this.lblRecordCount.Text = Convert.ToString(cmd1.ExecuteScalar());
        sqldata.pagecount = Convert.ToString(ps.PageCount);
        cn.Close();
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        this.Labelye.Text = Convert.ToString(Convert.ToInt32(this.Labelye.Text) - 1);
        this.databindlist();
    }
    protected void Button2_Click(object sender, EventArgs e)
    {

        this.Labelye.Text = Convert.ToString(Convert.ToInt32(this.Labelye.Text) + 1);
        this.databindlist();
    }
    protected void Button3_Click(object sender, EventArgs e)
    {
        this.Labelye.Text = "1";
        this.databindlist();
    }
    protected void Button4_Click(object sender, EventArgs e)
    {
        this.Labelye.Text = sqldata.pagecount;
        this.databindlist();
    }
    protected void mydatalist_ItemDataBound(object sender, DataListItemEventArgs e)
    {
        LinkButton lkb = (LinkButton)(e.Item.FindControl("LinkButton2"));
        if (lkb!= null)
        {
            lkb.Attributes.Add("onclick", "return confirm('您是否删除留言？');");
        }
    }
    protected void LinkButton2_Command(object sender, CommandEventArgs e)
    {
        cn = sqldata.createcon();
        cn.Open();
        cmd = new SqlCommand("delete from guestbook where id=" + e.CommandArgument, cn);
        if (Convert.ToInt32(cmd.ExecuteNonQuery()) > 0)
        {
        this.Labmessage .Text ="删除成功！";

        }
        else
        {
         this .Labmessage .Text ="删除失败！？";
        }
        cn.Close();

    }
}