using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
public partial class Homework : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
ViewState["pageindex"] = 1;
ViewState["pagenums"] = 0;
DatabindGrid();
}
CalcRecords();
CreateDh();
}
protected void Button1_Click(object sender, EventArgs e)
{
//用来存放页数
if (Session["user"] != null)
{
Pl();
}
else
{
ScriptManager.RegisterStartupScript(this, GetType(), "as", "<script>alert('请您先登录！')</script>", false);
}
}
private void Pl()
{
string strcon = "server=.\\sqlexpress;initial catalog=MyTest;integrated security=true";
using (SqlConnection con = new SqlConnection(strcon))
{
using (SqlCommand cmd = new SqlCommand("insert Mytext values(@name,@msg,@from,@date)", con))
{
con.Open();
cmd.Parameters.AddWithValue("@name", Session["user"].ToString());
cmd.Parameters.AddWithValue("@msg", TextBox1.Text.Trim());
cmd.Parameters.AddWithValue("@from", "河北软件");
cmd.Parameters.AddWithValue("@date", System.DateTime.Now.ToString());
cmd.ExecuteNonQuery();
ScriptManager.RegisterStartupScript(this, GetType(), "as", "<script>alert('评论成功！')</script>", false);
DatabindGrid();
CalcRecords();
}
}
}
int pagenum = 10;
protected void DatabindGrid()
{
string strcon = "server=.\\sqlexpress;initial catalog=MyTest;integrated security=true";
using (SqlConnection con = new SqlConnection(strcon))
{
using (SqlCommand cmd = new SqlCommand("pageyouku",con))
{
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@pageindex",ViewState["pageindex"]);
cmd.Parameters.AddWithValue("@pagenum",pagenum.ToString());
DataTable dt = new DataTable();
SqlDataAdapter sda = new SqlDataAdapter(cmd);
sda.Fill(dt);
GridView1.DataSource = dt;
GridView1.DataBind();
}
}
if (Convert.ToInt32(ViewState["pageindex"].ToString()) == Convert.ToInt32(ViewState["pagenums"].ToString()))
{
// ScriptManager.RegisterStartupScript(this, GetType(), "as", "<script>alert('评论成功！')</script>", false);
Label1.Text = "第" + ((Convert.ToInt32(ViewState["pageindex"].ToString()) - 1)*10).ToString() + "-" + Label3.Text.Trim();
}
else
{
Label1.Text = "第" + (Convert.ToInt32(ViewState["pageindex"].ToString()) * 10 - 9).ToString() + "-" + (Convert.ToInt32(ViewState["pageindex"].ToString()) * 10).ToString();
//Label1.Text ="第"+
}
}
//创建导航条
protected void CalcRecords()
{
// int pagenums = 0;
string strcon = "server=.\\sqlexpress;initial catalog=MyTest;integrated security=true";
using (SqlConnection con = new SqlConnection(strcon))
{
using (SqlCommand cmd = new SqlCommand("select count(*) from Mytext", con))
{
con.Open();
object obj = cmd.ExecuteScalar();
if (obj!=null)
{
Label3.Text = obj.ToString();
if (Convert.ToInt32(obj.ToString()) % 10 == 0)
{
ViewState["pagenums"] = Convert.ToInt32(obj.ToString()) / 10;
}
else
{
ViewState["pagenums"] = Convert.ToInt32(obj.ToString()) / 10 + 1;
}
}
}
}
}
//单击分页
void btn_Command(object sender, CommandEventArgs e)
{
//throw new NotImplementedException();
// ScriptManager.RegisterStartupScript(this, GetType(), "as", "<script>alert('评论成功！')</script>", false);
Button btn = (Button)sender;
ViewState["pageindex"] = btn.Text.Trim();
DatabindGrid();
CalcRecords();
}
protected void CreateDh()
{
for (int i = 1; i <= Convert.ToInt32(ViewState["pagenums"].ToString()); i++)
{
Button btn = new Button();
btn.Text = i.ToString();
btn.Command += new CommandEventHandler(btn_Command);
if (!btn.Controls.Contains(btn))
{
dh.Controls.Add(btn);
}
}
}
protected void Button4_Click(object sender, EventArgs e)
{
string strcon = "server=.\\sqlexpress;initial catalog=MyTest;integrated security=true";
using (SqlConnection con = new SqlConnection(strcon))
{
using (SqlCommand cmd = new SqlCommand("select count(*) from T_user wherename=@name and
password=@pwd", con))
{
cmd.Parameters.AddWithValue("@name", TextBox2.Text.Trim());
cmd.Parameters.AddWithValue("@pwd", TextBox3.Text.Trim());
con.Open();
object obj = cmd.ExecuteScalar();
if (obj != null)
{
if (Convert.ToInt32(obj) == 1)
{
Session["user"] = TextBox2.Text.Trim();
}
else
{
ClientScript.RegisterClientScriptBlock(GetType(), "aa", "<script>alert('密码或用户名在误!')</script>");
}
}
}
}
}
protected void Button5_Click(object sender, EventArgs e)
{
if (Convert.ToInt32(ViewState["pageindex"].ToString())>1)
{
ViewState["pageindex"]=Convert.ToInt32(ViewState["pageindex"].ToString())-1;
DatabindGrid();
}
}
protected void Button6_Click(object sender, EventArgs e)
{
if (Convert.ToInt32(ViewState["pageindex"].ToString()) < Convert.ToInt32(ViewState["pagenums"].ToString()))
{
ViewState["pageindex"] = Convert.ToInt32(ViewState["pageindex"].ToString()) +1;
DatabindGrid();
}
}
}
