.Net分页控件发布.net -电脑资料

电脑资料时间：2019-01-01 我要投稿

【www.unjs.com - 电脑资料】

由于.net自带的分页功能极其死板，自定义性不强不能满足需求俺花了一个多星期的时间写成的一个.net分页控件特性: 1、支持datagrid,datalist等分种数据显示控件，理论上只要有datasource的控件都可以 2、支持url方式分页，url分页的每一页都可以被搜索引

由于.net自带的分页功能极其死板，自定义性不强不能满足需求

俺花了一个多星期的时间写成的一个.net分页控件

特性:

1、支持datagrid,datalist等分种数据显示控件，理论上只要有datasource的控件都可以

2、支持url方式分页，url分页的每一页都可以被搜索引擎搜到，并且支持url重写

3、控件样式可自定义

4、封装完全，使用过程序只需写一行代码

<PRE>1 /****************************************************************** 2 ** 文件名:Pager.cs 3 ** 创建人:杨响武 4 ** 日期:2005年7月27日 5 ** 修改人: 6 ** 日期: 7 ** 描述: 8 ** 9 **---------------------------------------------------------------- 10 ******************************************************************/ 11 12 using System; 13 using System.Web.UI.WebControls; 14 using System.Web.UI.HtmlControls; 15 using System.Web; 16 using System.Web.UI; 17 using System.Text.RegularExpressions; 18 19 namespace MyCompany.Controls 20 { 21 ///<SUMMARY> 22 /// 分页控件 23 ///</SUMMARY> 24 public class Pager : Label, INamingContainer 25 { 26 #region 成员变量和构造函数 27 HttpContext context = HttpContext.Current; 28 Label countLabel; 29 HyperLink previousButton; 30 HyperLink nextButton; 31 HyperLink firstButton; 32 HyperLink lastButton; 33 HyperLink[] pagingLinkButtons; 34 35 public override ControlCollection Controls 36 { 37 get 38 { 39 EnsureChildControls(); 40 return base.Controls; 41 } 42 } 43 44 protected override void CreateChildControls() 45 { 46 Controls.Clear(); 47 48 AddCountLabel(); 49 50 AddPageButtons(); 51 52 AddPreviousNextHyperLinks(); 53 54 AddFirstLastHyperLinks(); 55 } 56 #endregion 57 58 #region 呈现方法 59 protected override void Render(HtmlTextWriter writer) 60 { 61 // 修改总页数小于等于1的时候不呈现任何控件 62 // int totalPages = CalculateTotalPages(); 63 // 64 // if (totalPages <= 1) 65 // return; 66 67 AddAttributesToRender(writer); 68 69 writer.AddAttribute(HtmlTextWriterAttribute.Class, this.CssClass, false); 70 71 RenderCountLabel(writer); 72 73 RenderFirst(writer); 74 75 RenderPrevious(writer); 76 77 RenderPagingButtons(writer); 78 79 RenderNext(writer); 80 81 RenderLast(writer); 82 } 83 84 void RenderCountLabel(HtmlTextWriter writer) 85 { 86 countLabel.RenderControl(writer); 87 88 LiteralControl l = new LiteralControl(" "); 89 l.RenderControl(writer); 90 } 91 92 void RenderFirst (HtmlTextWriter writer) 93 { 94 firstButton.RenderControl(writer); 95 96 LiteralControl l = new LiteralControl(" "); 97 l.RenderControl(writer); 98 } 99 100 void RenderLast (HtmlTextWriter writer) 101 { 102 lastButton.RenderControl(writer); 103 104 LiteralControl l = new LiteralControl(" "); 105 l.RenderControl(writer); 106 } 107 108 void RenderPrevious (HtmlTextWriter writer) 109 { 110 previousButton.RenderControl(writer); 111 112 LiteralControl l = new LiteralControl(" "); 113 l.RenderControl(writer); 114 } 115 116 void RenderNext(HtmlTextWriter writer) 117 { 118 nextButton.RenderControl(writer); 119 120 LiteralControl l = new LiteralControl(" "); 121 l.RenderControl(writer); 122 } 123 124 private void RenderButtonRange(int start, int end, HtmlTextWriter writer) 125 { 126 for (int i = start; i < end; i++) 127 { 128 if (PageIndex == i) 129 { 130 Literal l = new Literal(); 131 l.Text = "" + (i + 1).ToString() + ""; 132 133 l.RenderControl(writer); 134 } 135 else 136 { 137 pagingLinkButtons[i].RenderControl(writer); 138 } 139 if (i < (end - 1)) 140 writer.Write(" "); 141 } 142 143 LiteralControl l1 = new LiteralControl(" "); 144 l1.RenderControl(writer); 145 } 146 147 private void RenderPagingButtons(HtmlTextWriter writer) 148 { 149 int totalPages; 150 151 totalPages = CalculateTotalPages(); 152 153 if (totalPages <= 10) 154 { 155 RenderButtonRange(0, totalPages, writer); 156 } 157 else 158 { 159 int lowerBound = (PageIndex - 4); 160 int upperBount = (PageIndex + 6); 161 162 if (lowerBound <= 0) 163 lowerBound = 0; 164 165 if (PageIndex <= 4) 166 RenderButtonRange(0, 10, writer); 167 168 else if (PageIndex < (totalPages - 5)) 169 RenderButtonRange(lowerBound, (PageIndex + 6), writer); 170 171 else if (PageIndex >= (totalPages - 5)) 172 RenderButtonRange((totalPages - 10), totalPages, writer); 173 } 174 } 175 176 #endregion 177 178 #region 控件树方法 179 ///<SUMMARY> 180 /// 信息标签 181 ///</SUMMARY> 182 void AddCountLabel() 183 { 184 countLabel = new Label(); 185 countLabel.ID = "countLabel"; 186 countLabel.Text = string.Format(text, CalculateTotalPages().ToString("n0")); 187 188 Controls.Add(countLabel); 189 } 190 191 private void AddPageButtons() 192 { 193 pagingLinkButtons = new HyperLink[CalculateTotalPages()]; 194 195 for (int i = 0; i < pagingLinkButtons.Length; i++) 196 { 197 pagingLinkButtons[i] = new HyperLink(); 198 pagingLinkButtons[i].EnableViewState = false; 199 pagingLinkButtons[i].Text = (i + 1).ToString(); 200 pagingLinkButtons[i].ID = i.ToString(); 201 pagingLinkButtons[i].CssClass = linkCss; 202 pagingLinkButtons[i].NavigateUrl = GetHrefString(i); 203 204 Controls.Add(pagingLinkButtons[i]); 205 } 206 } 207 208 ///<SUMMARY> 209 /// 首页末页 210 ///</SUMMARY> 211 void AddFirstLastHyperLinks() 212 { 213 firstButton = new HyperLink(); 214 firstButton.ID = "First"; 215 firstButton.Text = "首页"; 216 if(PageIndex != 0 && CalculateTotalPages() > 0) 217 { 218 firstButton.NavigateUrl = GetHrefString(0); 219 } 220 else 221 { 222 firstButton.Enabled = false; 223 } 224 225 Controls.Add(firstButton); 226 227 lastButton = new HyperLink(); 228 lastButton.ID = "Last"; 229 lastButton.Text = "末页"; 230 if(PageIndex != CalculateTotalPages() - 1) 231 { 232 lastButton.NavigateUrl = GetHrefString(CalculateTotalPages() - 1); 233 } 234 else 235 { 236 lastButton.Enabled = false; 237 } 238 Controls.Add(lastButton); 239 } 240 241 ///<SUMMARY> 242 /// 上一页下一页 243 ///</SUMMARY> 244 void AddPreviousNextHyperLinks() 245 { 246 previousButton = new HyperLink(); 247 previousButton.ID = "Prev"; 248 previousButton.Text = "上一页"; 249 if (HasPrevious) 250 { 251 previousButton.NavigateUrl = GetHrefString(PageIndex - 1); 252 } 253 else 254 { 255 previousButton.Enabled = false; 256 } 257 Controls.Add(previousButton); 258 259 nextButton = new HyperLink(); 260 nextButton.ID = "Next"; 261 nextButton.Text = "下一页"; 262 if(HasNext) 263 { 264 nextButton.NavigateUrl = GetHrefString(PageIndex + 1); 265 } 266 else 267 { 268 nextButton.Enabled = false; 269 } 270 Controls.Add(nextButton); 271 } 272 #endregion 273 274 #region 私有属性 275 private bool HasPrevious 276 { 277 get 278 { 279 if (PageIndex > 0) 280 return true; 281 282 return false; 283 } 284 } 285 286 private bool HasNext 287 { 288 get 289 { 290 if (PageIndex + 1 < CalculateTotalPages() ) 291 return true; 292 293 return false; 294 } 295 } 296 #endregion 297 298 #region 帮助方法和公共属性 299 300 ///<SUMMARY> 301 /// 获取分页导航按钮的超链接字符串 302 ///</SUMMARY> 303 ///<PARAM name="pageIndex">该分页按钮相对应的页索引</PARAM> 304 ///<RETURNS>分页导航按钮的超链接字符串</RETURNS> 305 private string GetHrefString(int pageIndex) 306 { 307 string url = Page.Request.RawUrl; 308 309 if (Regex.IsMatch(url, @"(\d+).shtml", RegexOptions.IgnoreCase)) 310 { 311 url = Regex.Replace(url, @"(\d+).shtml", pageIndex + ".shtml"); 312 } 313 314 if (Regex.IsMatch(url, @"PageIndex=(\d+)", RegexOptions.IgnoreCase)) 315 { 316 url = Regex.Replace(url, @"PageIndex=(\d+)", "PageIndex=" + pageIndex.ToString()); 317 } 318 319 return Page.Server.UrlPathEncode(url); 320 } 321 322 public int CalculateTotalPages() 323 { 324 int totalPagesAvailable; 325 326 if (TotalRecords == 0) 327 return 0; 328 329 totalPagesAvailable = TotalRecords / PageSize; 330 331 if ((TotalRecords % PageSize) > 0) 332 totalPagesAvailable++; 333 334 return totalPagesAvailable; 335 } 336 337 ///<SUMMARY> 338 /// 当前页 339 ///</SUMMARY> 340 public int PageIndex 341 { 342 get 343 { 344 int _pageIndex = 0; 345 346 if ((!Page.IsPostBack) && (context.PageIndex > 0)) 347 _pageIndex = context.PageIndex; 348 else 349 _pageIndex = Convert.ToInt32(ViewState["PageIndex"]); 350 351 if (_pageIndex < 0) 352 return 0; 353 else 354 { 355 if (_pageIndex > CalculateTotalPages()-1) 356 return CalculateTotalPages()-1; 357 else 358 return _pageIndex; 359 } 360 } 361 set 362 { 363 ViewState["PageIndex"] = value; 364 } 365 } 366 367 ///<SUMMARY> 368 /// 每页记录数 369 ///</SUMMARY> 370 public int PageSize 371 { 372 get 373 { 374 int pageSize = Convert.ToInt32(ViewState["PageSize"]); 375 376 if (pageSize == 0) 377 { 378 return 10; 379 } 380 381 return pageSize; 382 } 383 set 384 { 385 ViewState["PageSize"] = value; 386 } 387 388 } 389 390 ///<SUMMARY> 391 /// 总记录数 392 ///</SUMMARY> 393 public int TotalRecords 394 { 395 get 396 { 397 return Convert.ToInt32(ViewState["TotalRecords"]); 398 } 399 set 400 { 401 ViewState["TotalRecords"] = value; 402 } 403 } 404 405 private string text = "共{0}页"; 406 407 private string linkCss = ""; 408 ///<SUMMARY> 409 /// 链接样式 410 ///</SUMMARY> 411 public string LinkCss 412 { 413 get { return linkCss; } 414 set { linkCss = value;} 415 } 416 417 private string textCss = ""; 418 ///<SUMMARY> 419 /// 文字样式 420 ///</SUMMARY> 421 public string TextCss 422 { 423 get { return textCss; } 424 set { textCss = value;} 425 } 426 427 public string TextFormat 428 { 429 get 430 { 431 return text; 432 } 433 set 434 { 435 text = value; 436 } 437 } 438 439 #endregion 440 } 441 } 442 </PRE>

在页面上只需要向下面这样写：

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原文转自：http://www.ltesting.net

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