user_manage_blog.aspx.cs

本程序基于 asp.net 2.0 +sql server 2

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 user_manage_blog : System.Web.UI.Page
{
    SqlDataReader dr;
    string  blogid, title, add_date;
    int userid ,pagesize=10;
    int text_folder;

    protected void Page_Load(object sender, EventArgs e)
    {
        if (Session["userid"] == null)
            Response.Redirect("~/user/userLogin.aspx?url="+Server .HtmlEncode(Request .RawUrl ));
        else
            userid = Convert.ToInt32(Session["userid"].ToString());

        if (Request.QueryString["text_folder"] != null)
            this.text_folder = Convert.ToInt32(Request.QueryString["text_folder"]);
        else
            this.text_folder = 0;
        
        if (!IsPostBack)
        {
            pageNavigate();
            readblog(1);
            ViewState["currentPage"] = 1;
        }
    }


    //根据用户的userid，和当前状态视图中存储的页码 读取指定条数的数据记录并显示
    private string readblog(int pageindex)
    {
        string strconn = ConfigurationManager.ConnectionStrings["dsn"].ToString();

        SqlConnection cn = new SqlConnection(strconn);
        cn.Open();
        SqlCommand cm = new SqlCommand("pageBlog", cn );
        cm.CommandType = CommandType.StoredProcedure;

        cm.Parameters.Add("@userid", SqlDbType.Int);
        cm.Parameters.Add("@PageSize", SqlDbType.Int);
        cm.Parameters.Add("@PageIndex", SqlDbType.Int);
        cm.Parameters.Add("@text_folder", SqlDbType.Int);

        cm.Parameters["@userid"].Value = this.userid ;
        cm.Parameters["@PageSize"].Value = pagesize;
        cm.Parameters["@PageIndex"].Value = pageindex;
        cm.Parameters["@text_folder"].Value = this.text_folder;

        try
        {
            this.dr = cm.ExecuteReader();
            displayData();
            ViewState["currentPage"] = pageindex ;
            lb_current_page.Text = pageindex.ToString () ;
            return "success";

        }
        catch (SqlException ex)
        {
            return ex.Message;
        }
        finally 
        { 
            cn.Close();
        }      
    }
    //输出html文本，输出的是一个表格，输出到了预先定义的span （message） 中
    private void displayData()
    {
        string head,data="";
        head  = "<table><tr class=firstrow>";
        head += "<td class=col1>编号</td>";
        head += "<td class=col4>标题</td>";
        head += "<td class=col3>日期</td>";
        head += "<td class=col1>编辑</td>";
        head += "<td class=col1>删除</td></tr>";

        while  (this.dr.Read())
        {
            this.blogid =dr["blogid"].ToString();
            this.title =dr["title"].ToString();
            this.add_date =dr["add_date"].ToString();

            data += "<tr class=datarow>";
            data += "<td>" + blogid  + "</td>";
            data += "<td><a href=../article.aspx?userid=" + userid + "&blogid=" + blogid;
            data += ">"+ title + "</a></td>";
            data += "<td>" + add_date   + "</td>";
            data += "<td><a href=user_blog_edit.aspx?blogid=";
            data += Convert.ToInt32(blogid );
            data +=">编辑</a></td>";
            data += "<td><a href=user_blog_delete.aspx?blogid=";
            data += Convert.ToInt32(blogid );
            data += ">删除</a></td>";
            data += "</tr>";
        }
        string all =head + data + "</table>";
        message.InnerHtml = all;
    }

    //生成总页数，根据每页显示多少条记录得出页数
    private void pageNavigate()
    {
        string strconn = ConfigurationManager.ConnectionStrings["dsn"].ToString();
        SqlConnection cn = new SqlConnection(strconn);
        cn.Open();

        string mysql = "select count(blogid) from blog where text_folder="+ this.text_folder +" and userid=" + userid;
        SqlCommand cm = new SqlCommand(mysql, cn);

        SqlDataReader sumdr = cm.ExecuteReader();
        if (sumdr.Read())
            ViewState["sumPage"] = Convert.ToInt32(sumdr[0].ToString()) / pagesize + 1;
        lb_sum_page.Text = ViewState["sumPage"].ToString();
        cn.Close();
    }

    //页面直接跳转
    protected void tb_goPage_TextChanged(object sender, EventArgs e)
    {
        int x = Convert.ToInt32(tb_goPage.Text);
        if (x < 1) x = 1;
        int sumpage = Convert.ToInt32(ViewState["sumPage"].ToString());
        if (x > sumpage) x = sumpage; 
        readblog(x);
    }

//上一页
    protected void lb_previous_Click(object sender, EventArgs e)
    {
        int x = Convert.ToInt32(ViewState["currentPage"].ToString ()) - 1;
        if (x < 1) x = 1;
        readblog(x);
    }

    //下一页
    protected void lb_next_Click(object sender, EventArgs e)
    {
        int x = Convert.ToInt32(ViewState["currentPage"].ToString ()) + 1;
        int sumpage = Convert.ToInt32(ViewState["sumPage"].ToString());
        if (x>sumpage) x = sumpage ;
        readblog(x);
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        string strconn = ConfigurationManager.ConnectionStrings["dsn"].ToString();
        SqlConnection cn = new SqlConnection(strconn);
        cn.Open();

        string sql = " select blogid,blog.userid,username,add_date,title,read_level from blog,users";

        if (dropSearch.SelectedValue == "blogid")
            sql += " where blogid=" + Convert.ToInt32(tbSearch.Text);
        else if (dropSearch.SelectedValue == "title")
            sql += " where title like '%" + Server.HtmlEncode(tbSearch.Text) + "%'";
        sql += " and users.userid=blog.userid and blog.userid="+this.userid ;
        sql+=" order by blogid desc";

        SqlCommand cm = new SqlCommand(sql, cn);

        try
        {
            this.dr = cm.ExecuteReader();
            displayData();
            navigator.InnerHtml = "";
        }
        catch (SqlException ex)
        {
            ;
        }
        finally
        {
            cn.Close();
        }
    }
}