ASP.NET MVC Pager Helper Extensions

正在做一个基本于MVC的项目,要用到分页,于是花了点时间,自已写了一个!

功能和效果和http://www.cnblogs.com/的完全一样,呵呵!

比cnblogs的多了一点点小东西,可以输入分页码跳转.

注:转载请注明:0x001.com原创,下载请看附件,在项目中引用即可

下载地址:Sov.pager.dll

运行效果:

Html Helper的代码:

1 namespace System.Web.Mvc
2 {
3     public static class PagerHelper
4     {
5         private const int defaultDisplayCount = 11;
6
7         #region HtmlHelper Extensions
8
9         /// <summary>
10         /// Pager Helper Extensions
11         /// </summary>
12         /// <param name="htmlHelper"></param>
13         /// <param name="currentPage">当前页码</param>
14         /// <param name="pageSize">页面显示的数据条目</param>
15         /// <param name="totalCount">总记录数</param>
16         /// <param name="toDisplayCount">Helper要显示的页数</param>
17         /// <returns></returns>
18         public static string Pager(this HtmlHelper htmlHelper, int currentPage, int pageSize, int totalCount, int toDisplayCount)
19         {
20             RenderPager pager = new RenderPager(htmlHelper.ViewContext,currentPage, pageSize,totalCount,toDisplayCount);
21
22             return pager.RenderHtml();
23         }
24
25         /// <summary>
26         /// Pager Helper Extensions
27         /// </summary>
28         /// <param name="htmlHelper"></param>
29         /// <param name="currentPage">当前页码</param>
30         /// <param name="pageSize">页面显示的数据条目</param>
31         /// <param name="totalCount">总记录数</param>
32         /// <returns></returns>
33         public static string Pager(this HtmlHelper htmlHelper, int currentPage, int pageSize, int totalCount)
34         {
35             RenderPager pager = new RenderPager(htmlHelper.ViewContext, currentPage, pageSize, totalCount,defaultDisplayCount);
36
37             return pager.RenderHtml();
38         }
39
40         /// <summary>
41         /// IEnumerable extensions
42         /// </summary>
43         public static PageList<T> ToPageList<T>(this IEnumerable<T> source, int pageIndex, int pageSize, int totalCount)
44         {
45             return new PageList<T>(source, pageIndex, pageSize, totalCount);
46         }
47
48         #endregion
49     }
50 }

输出显示代码:

  1 namespace Sov.Pager
  2 {
  3     public class RenderPager
  4     {
  5         #region 字段
  6
  7         /// <summary>
  8         /// 当前页面的ViewContext
  9         /// </summary>
10         private ViewContext viewContext;
11         /// <summary>
12         /// 当前页码
13         /// </summary>
14         private readonly int currentPage;
15         /// <summary>
16         /// 页面要显示的数据条数
17         /// </summary>
18         private readonly int pageSize;
19         /// <summary>
20         /// 总的记录数
21         /// </summary>
22         private readonly int totalCount;
23         /// <summary>
24         /// Pager Helper 要显示的页数
25         /// </summary>
26         private readonly int toDisplayCount;
27
28         private readonly string pagelink;
29
30         #endregion
31
32         #region 构造函数
33
34         public RenderPager(ViewContext viewContext, int currentPage, int pageSize, int totalCount, int toDisplayCount)
35         {
36             this.viewContext = viewContext;
37             this.currentPage = currentPage;
38             this.pageSize = pageSize;
39             this.totalCount = totalCount;
40             this.toDisplayCount = toDisplayCount;
41
42
43             string reqUrl = viewContext.RequestContext.HttpContext.Request.RawUrl;
44             string link = "";
45
46             Regex re = new Regex(@"page=(\d+)|page=", RegexOptions.IgnoreCase);
47
48             MatchCollection results = re.Matches(reqUrl);
49
50             if (results.Count > 0)
51             {
52                 link = reqUrl.Replace(results[0].ToString(), "page=[%page%]");
53             }
54             else if (reqUrl.IndexOf("?") < 0)
55             {
56                 link = reqUrl + "?page=[%page%]";
57             }
58             else
59             {
60                 link = reqUrl + "&page=[%page%]";
61             }
62             this.pagelink = link;
63         }
64
65         #endregion
66
67         #region 方法
68
69         public string RenderHtml()
70         {
71             if (totalCount <= pageSize)
72                 return string.Empty;
73
74             //总页数
75             int pageCount = (int)Math.Ceiling(this.totalCount / (double)this.pageSize);
76
77             //起始页
78             int start = 1;
79
80             //结束页
81             int end = toDisplayCount;
82             if (pageCount < toDisplayCount) end = pageCount;
83
84             //中间值
85             int centerNumber = toDisplayCount / 2;
86
87             if (pageCount > toDisplayCount)
88             {
89
90                 //显示的第一位
91                 int topNumber = currentPage - centerNumber;
92
93                 if (topNumber > 1)
94                 {
95                     start = topNumber;
96                 }
97
98                 if (topNumber > pageCount - toDisplayCount)
99                 {
100                     start = pageCount - toDisplayCount + 1;
101                 }
102
103                 //显示的最后一位
104                 int endNumber = currentPage + centerNumber;
105
106                 if (currentPage >= pageCount - centerNumber)
107                 {
108                     end = pageCount;
109                 }
110                 else
111                 {
112                     if (endNumber > toDisplayCount)
113                     {
114                         end = endNumber;
115                     }
116                 }
117
118             }
119
120             StringBuilder sb = new StringBuilder();
121
122             //Previous
123             if (this.currentPage > 1)
124             {
125                 sb.Append(GeneratePageLink("< Prev", this.currentPage - 1));
126             }
127
128             if (start > 1)
129             {
130                 sb.Append(GeneratePageLink("1", 1));
131                 sb.Append("...");
132             }
133
134             //end Previous
135
136             for (int i = start; i <= end; i++)
137             {
138                 if (i == this.currentPage)
139                 {
140                     sb.AppendFormat("<span class=\"current\">{0}</span>", i);
141                 }
142                 else
143                 {
144                     sb.Append(GeneratePageLink(i.ToString(), i));
145                 }
146             }
147
148             //Next
149             if (end < pageCount)
150             {
151                 sb.Append("...");
152                 sb.Append(GeneratePageLink(pageCount.ToString(), pageCount));
153             }
154
155             if (this.currentPage < pageCount)
156             {
157                 sb.Append(GeneratePageLink("Next >", this.currentPage + 1));
158             }
159             //end Next
160
161             sb.Append("<span><input type=\"text\" class=\"pagerInput\" id=\"pagerInput\" maxlength=\"4\" οnkeypress=\"return event.keyCode>=48&&event.keyCode<=57\"/></span>");
162             sb.Append("<span><input type=\"button\" value=\"跳转\" class=\"pagerButton\" οnclick=\"if (!isNaN(parseInt(pagerInput.value))) window.location='" + this.pagelink.Replace("[%page%]", "") + "'+pagerInput.value;\"/></span>");
163
164             return sb.ToString();
165         }
166
167         /// <summary>
168         /// 生成Page的链接
169         /// </summary>
170         /// <param name="linkText">文字</param>
171         /// <param name="PageNumber">页码</param>
172         /// <returns></returns>
173         private string GeneratePageLink(string linkText, int PageNumber)
174         {
175
176             string linkFormat = string.Format("<a href=\"{0}\">{1}</a>", this.pagelink.Replace("[%page%]", PageNumber.ToString()), linkText);
177
178             return linkFormat;
179
180         }
181
182         #endregion
183     }
184 }
185

PageList封装Model代码:

1 namespace System.Web.Mvc
2 {
3     public class PageList<T>:List<T>
4     {
5         /// <summary>
6         /// 当前分页
7         /// </summary>
8         public int PageIndex { get; private set; }
9         /// <summary>
10         /// 显示数据条目
11         /// </summary>
12         public int PageSize { get; private set; }
13         /// <summary>
14         /// 总页数
15         /// </summary>
16         public int TotalCount { get; private set; }
17
18         public PageList(IEnumerable<T> source, int pageIndex, int pageSize, int totalCount)
19         {
20             PageIndex = pageIndex;
21
22             PageSize = pageSize;
23
24             TotalCount = totalCount;
25
26             AddRange(source);
27         }
28     }
29 }

使用的时候,可自定义CSS,以下是我自用的CSS:

1 /* Pager */
2 .pager
3 {
4     font-size: 12px;
5     margin: 8px 0;
6     padding: 3px 0 3px;
7     text-align: left;
8 }
9
10 .pager .current
11 {
12     background-color: #06c;
13     border: 1px solid #009;
14     color: #fff;
15     font-weight: bold;
16     margin-top: 4px;
17     padding: 3px 5px;
18     text-align: center;
19 }
20
21 .pager a
22 {
23     margin: 4px 3px;
24     border: 1px solid #9AAFE5;
25     padding: 3px 5px;
26     text-align: center;
27     text-decoration: none;
28     color: #2E6AB1;
29 }
30
31 .pager .pagerInput
32 {
33     padding: 3px 0 0 0;
34     border: 1px solid #9AAFE5;
35     text-align: center;
36     text-decoration: none;
37     height: 16px;
38     width: 30px;
39 }
40 .pager .pagerButton
41 {
42     border: 1px solid #9AAFE5;
43     cursor: pointer;
44 }

ASP.NET MVC中使用方法如下:

Controller Action

1 /// <summary>
2 /// 获取角色列表
3 /// </summary>
4 /// <returns></returns>
5 private List<RBAC_Role> RoleList(int? page)
6 {
7     if (!page.HasValue)
8     {
9         page = 1;
10     }
11     int total = 0;
12     int pageSize = 2;
13
14     //获得角色数据列表
15     List<RBAC_Role> roleItems = Bll.GetPageData(page.Value,pageSize,ref total);
16
17     return roleItems.ToPageList(page.Value, pageSize, total);
18 }

现在在View里面的头部加上Model类型并只需要如下调用:

1 <%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<PageList<Entity.RBAC_Role>>" %>

这样使用起来是非常方便的!欢迎大家使用

转载于:https://www.cnblogs.com/0x001/archive/2010/01/12/1645965.html

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