一般由微软自带的分页效率极低
每次查询服务器端都会发送所有的查询记录到浏览器端
为此，很多人就用存储过程来提高效率，每次传送的都是一个页面的内容
今天自己弄了个分页的，呵呵
每次都传送一个页面的内容，不过没有用到存储过程，呵呵
看代码自己领悟吧，呵呵...
在前台弄些分页的常用控件，呵呵
<asp:Button ID="Button3" runat="server" Text="首页" OnClick="Button3_Click" />
<asp:Button ID="Button1" runat="server" Text="上一页" OnClick="Button1_Click" />
当前第<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>页
<asp:Button ID="Button2" runat="server" Text="下一页" OnClick="Button2_Click" />
<asp:Button ID="Button4" runat="server" Text="尾页" OnClick="Button4_Click" />
跳到第<asp:TextBox ID="TextBox1" runat="server" Width="31px"></asp:TextBox>页<asp:Button ID="Button5" runat="server" OnClick="Button5_Click" Text="GO" />
后台代码如下，呵呵...
PRivate static int pagesize;
private static int n;//count
private static int c;//current index
string connectionstring = ConfigurationManager.AppSettings["SqlConnectionString"].ToString();
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
Button1.Enabled = false;
Label1.Text = "1";
pagesize = 5;
c=n=count();
msg_top(c);
}
}
private int count()
{
SqlConnection con = new SqlConnection(connectionstring);
con.Open();
string sql = "select count(*) from MSGPlate";
SqlCommand cmd = new SqlCommand(sql, con);
return (int)cmd.ExecuteScalar();
}
void msg_top(int c)
{
string msg_top = "";
SqlConnection con = new SqlConnection(connectionstring);
con.Open();
string sql = "select top "+pagesize+" * from MSGPlate where id in(select top "+c+" id from MSGPlate order by id desc)order by id asc";
SqlCommand cmd = new SqlCommand(sql, con);
SqlDataReader rs = cmd.ExecuteReader();
Response.Write("<div id='MPback'>");
Response.Write("<div id='MPline'>");
Response.Write("<div id='MPicon'> </div>");
Response.Write("<div id='MPpage'>");
Response.Write("<strong>最新留言</strong> [<a href=msg_add.aspx >添加留言</a>]");
Response.Write("</div>");
Response.Write("<div id='MPfont'>");
Response.Write("<SPAN id=fontCtrl title=设置字体大小>大字/<A class=b1 href='javascript:setSize(12)'><font color='FFFD68'>小字</font></A></SPAN>");
Response.Write("</div>");
Response.Write("</div>");
Response.Write("</div>");
if (rs.HasRows)
{
while (rs.Read())
{
Response.Write("<div class='MPct'>");
Response.Write("<div class='MPcta'>");
Response.Write("<strong> 标题：" + rs["title"].ToString() + "</strong>");
Response.Write("</div>");
Response.Write("<div class='MPctb'>");
Response.Write("操作");
Response.Write("</div>");
Response.Write("</div>");
Response.Write("<div class='MPcl'>");
Response.Write("<div class='MPclc'>");
Response.Write("" + rs["content"].ToString() + "");
Response.Write("</div>");
Response.Write("<div class='MPclinfo'>");
Response.Write("</div>");
Response.Write("<div class='MPclin'>");
Response.Write("<div class='MPlefts'>");
Response.Write("<strong> </strong>");
Response.Write("</div>");
Response.Write("<div style='width:100%; height:auto; font-weight:600; text-align:left; padding-left:30px'>回复:</div>");
Response.Write("<div style='width:100%; height:auto; text-align:left; padding-left:40px;'>" + rs["recall"].ToString() + "</div>");
Response.Write("<div class='MPrights'>");
Response.Write("<strong> 发表：</strong>" + rs["cname"].ToString() + "");
Response.Write("<strong> 时间：</strong>" + rs["addtime"].ToString() + "");
Response.Write("</div></div>");
Response.Write("</div>");
}
}
con.Close();
}
protected void Button1_Click(object sender, EventArgs e)
{
Button1.Enabled = true;
Button2.Enabled = true;
if (c >= n-pagesize)
{
Button1.Enabled = false;
}
Response.Clear();
c = c + pagesize;
Response.Write(c.ToString());
msg_top(c);
Label1.Text = Convert.ToString((n - c) / pagesize + 1);
}
protected void Button2_Click(object sender, EventArgs e)
{
Button1.Enabled = true;
Button2.Enabled = true;
if (c <=pagesize*2)
{
Button2.Enabled = false;
}
Response.Clear();
c = c - pagesize;
Response.Write(c.ToString());
msg_top(c);
Label1.Text=Convert.ToString((n-c)/pagesize+1);
}
protected void Button3_Click(object sender, EventArgs e)
{
Button1.Enabled = false;
Button2.Enabled = true;
c = n;
Response.Clear();
Response.Write(c.ToString());
msg_top(c);
Label1.Text = "1";
}
protected void Button4_Click(object sender, EventArgs e)
{
Button1.Enabled = true;
Button2.Enabled = false;
c =n- (n / pagesize)*pagesize;
Response.Clear();
Response.Write(c.ToString());
msg_top(c);
Label1.Text = Convert.ToString(n/pagesize + 1);
}
protected void Button5_Click(object sender, EventArgs e)
{
int gx = Convert.ToInt32(TextBox1.Text);
if (gx < 1 || gx > n / pagesize)
{
}
else
{
Button1.Enabled = true;
Button2.Enabled = true;
if (c >= n - pagesize)
{
Button1.Enabled = false;
}
if (c <= pagesize * 2)
{
Button2.Enabled = false;
}
c = n - ((gx - 1) * pagesize);
Response.Clear();
Response.Write(c.ToString());
msg_top(c);
Label1.Text = Convert.ToString((n - c) / pagesize + 1);
}
}
