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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Text.RegularExpressions;
using System.Collections;
namespace YSMV.Control
{
[DefaultProperty("Text")]
[ToolboxData("<{0}:YsmvRepeater runat=\"server\" AllowPage=\"true\" PageSize=\"10\" ShowPage=\"true\"></{0}:YsmvRepeater>")]
public class YsmvRepeater : Repeater
{
//Static param
private static readonly Regex RX;
private static readonly object EventPageChanged;
static YsmvRepeater()
{
RX = new Regex(@"^&page=\d+", RegexOptions.Compiled);
EventPageChanged = new object();
}
//Static constants
protected const string HTML1 = "<table cellpadding=0 cellspacing=0 class='inputTable'><tr><td colspan=2>";
protected const string HTML2 = "</td></tr><tr><td class=paging align=left>";
protected const string HTML3 = "</td><td align=right class=paging>";
protected const string HTML4 = "</td></tr></table>";
private const string LINK_PREV = "<a href=?page={0}>< Previous</a>";
private const string LINK_MORE = "<a href=?page={0}>More ></a>";
private const string KEY_PAGE = "page";
private const string COMMA = "?";
private const string AMP = "&";
protected string emptyText;
private IList dataSource;
private int pageSize = 10;
private int currentPageIndex;
private int itemCount;
private bool allowPage = false;
private bool showPage = true;
[Browsable(true)
, Category("Appearance"),
DefaultValue(true),
Description("是否显示翻页链接")
]
public bool ShowPage
{
get { return showPage; }
set { showPage = value; }
}
[Browsable(true),
Category("Appearance"),
DefaultValue(true),
Description("是否允许分页")]
public bool AllowPage
{
get { return allowPage; }
set { allowPage = value; }
}
[Browsable(true),
Category("Appearance"),
DefaultValue(10),
Description("每页显示的数量")
]
public int PageSize
{
get { return pageSize; }
set { pageSize = value; }
}
[Browsable(true),
Category("Appearance"),
DefaultValue(""),
Description("无记录时候显示的内容")]
public string EmptyText
{
set { emptyText = value; }
}
override public object DataSource
{
set
{
//This try catch block is to avoid issues with the VS.NET designer
//The designer will try and bind a datasource which does not derive from ILIST
try
{
dataSource = (IList)value;
ItemCount = dataSource.Count;
}
catch
{
dataSource = null;
ItemCount = 0;
}
}
}
protected int PageCount
{
get { return (ItemCount - 1) / pageSize; }
}
virtual public int ItemCount
{
get { return itemCount; }
set
{itemCount = value;}
}
virtual public int CurrentPageIndex
{
get { return currentPageIndex; }
set { currentPageIndex = value; }
}
public void SetPage(int index)
{
//OnPageIndexChanged(new DataGridPageChangedEventArgs(null, index));
OnPageIndexChanged(new GridViewPageEventArgs(index));
}
override protected void OnLoad(EventArgs e)
{
if (Visible)
{
string page = Context.Request[KEY_PAGE];
int index = (page != null) ? int.Parse(page) : 0;
SetPage(index);
}
}
/// <summary>
/// Overriden method to control how the page is rendered
/// </summary>
/// <param name="writer"></param>
override protected void Render(HtmlTextWriter writer)
{
//Check there is some data attached
string page = Context.Request[KEY_PAGE];
int index = (page != null) ? int.Parse(page) : 0;
if (ItemCount == 0)
{
writer.Write(emptyText);
return;
}
//Mask the query
string query = Context.Request.Url.Query.Replace(COMMA, AMP);
query = RX.Replace(query, string.Empty);
// Write out the first part of the control, the table header
writer.Write(HTML1);
// Call the inherited method
base.Render(writer);
// Write out a table row closure
writer.Write(HTML2);
//Determin whether next and previous buttons are required
//Previous button?
if (currentPageIndex > 0)
{
if (ShowPage)
writer.Write(string.Format(LINK_PREV, (currentPageIndex - 1) + query));
}
//Close the table data tag
writer.Write(HTML3);
//Next button?
if (currentPageIndex < PageCount)
{
if (ShowPage)
writer.Write(string.Format(LINK_MORE, (currentPageIndex + 1) + query));
}
//Close the table
writer.Write(HTML4);
}
override protected void OnDataBinding(EventArgs e)
{
if (!allowPage)
{
base.DataSource = dataSource;
base.OnDataBinding(e);
return;
}
//Work out which items we want to render to the page
int start = CurrentPageIndex * pageSize;
int size = Math.Min(pageSize, ItemCount - start);
IList page = new ArrayList();
//Add the relevant items from the datasource
for (int i = 0; i < size; i++)
page.Add(dataSource[start + i]);
//set the base objects datasource
base.DataSource = page;
base.OnDataBinding(e);
}
//public event DataGridPageChangedEventHandler PageIndexChanged;
public event GridViewPageEventHandler PageIndexChanged
{
add
{
Events.AddHandler(EventPageChanged, value);
}
remove
{
Events.RemoveHandler(EventPageChanged, value);
}
}
virtual protected void OnPageIndexChanged(GridViewPageEventArgs e)
{
GridViewPageEventHandler pagehandler = (GridViewPageEventHandler)Events[EventPageChanged];
if (pagehandler != null)
pagehandler(this, e);
}
}
}
public string Mepage(int Mcount, int pagesize, string Mepostbackurl, string Meurlstr, string Meurlpage)
{
int num;
int num2;
StringBuilder builder = new StringBuilder();
string str = Meurlstr + Meurlpage;
if ((HttpContext.Current.Request.QueryString[Meurlpage] != null) && int.TryParse(HttpContext.Current.Request.QueryString[Meurlpage], out num))
{
num2 = Convert.ToInt32(HttpContext.Current.Request.QueryString[Meurlpage]);
}
else
{
num2 = 1;
}
int num3 = Mcount / pagesize;
if (num3 == 0)
{
num3 = 1;
}
else if ((Mcount % pagesize) > 0)
{
num3++;
}
builder.Append("<table><tr>");
builder.Append("<td>");
builder.Append("共有条" + Mcount.ToString() + "记录 ");
builder.Append(string.Concat(new object[] { "当前是第", num2, "/", num3, "页 " }));
if (num3 == 1)
{
builder.Append("首页 ");
builder.Append("上一页 ");
builder.Append("下一页 ");
builder.Append("最后一页");
}
else if (num2 == 1)
{
builder.Append("首页 ");
builder.Append("上一页 ");
builder.Append(string.Concat(new object[] { "<a href=", Mepostbackurl, "?", str, "=", num2 + 1, ">下一页</a> " }));
builder.Append(string.Concat(new object[] { "<a href=", Mepostbackurl, "?", str, "=", num3, ">最后一页</a>" }));
}
else if (num2 >= num3)
{
builder.Append("<a href=" + Mepostbackurl + "?" + str + "=1>首页</a> ");
builder.Append(string.Concat(new object[] { "<a href=", Mepostbackurl, "?", str, "=", num2 - 1, ">上一页</a> " }));
builder.Append("下一页 ");
builder.Append("最后一页");
}
else
{
builder.Append("<a href=" + Mepostbackurl + "?" + str + "=1>首页</a> ");
builder.Append(string.Concat(new object[] { "<a href=", Mepostbackurl, "?", str, "=", num2 - 1, ">上一页</a> " }));
builder.Append(string.Concat(new object[] { "<a href=", Mepostbackurl, "?", str, "=", num2 + 1, ">下一页</a> " }));
builder.Append(string.Concat(new object[] { "<a href=", Mepostbackurl, "?", str, "=", num3, ">最后一页</a>" }));
}
builder.Append("</td>");
builder.Append("<td><select id=\"MeSelectPage\" onchange=\"window.location='" + Mepostbackurl + "?" + str + "='+this.options[this.selectedIndex].value\">\r\n");
for (int i = 1; i < (num3 + 1); i++)
{
if ((HttpContext.Current.Request.QueryString[Meurlpage] != null) && (HttpContext.Current.Request.QueryString[Meurlpage].ToString() == i.ToString()))
{
builder.Append(string.Concat(new object[] { "<option value=", i, " selected>", i, "页</option>\r\n" }));
}
else
{
builder.Append(string.Concat(new object[] { "<option value=", i, ">", i, "页</option>\r\n" }));
}
}
builder.Append("</select></td>\r\n");
builder.Append("</tr></table>");
return builder.ToString();
}