Html辅助方法（分页、下拉框）

引用命名空间：

using System.Text;
using System.Web.Mvc;

Html分页方法

#region 分页Html辅助方法/// <summary>/// 分页Html辅助方法/// </summary>/// <param name="htmlHelper"></param>/// <param name="currentPage"></param>/// <param name="pageSize"></param>/// <param name="totalCount"></param>/// <param name="parameterString"></param>/// <returns></returns>public static HtmlString PageNavigate(this HtmlHelper htmlHelper, int currentPage, int pageSize, int totalCount, string parameterString){var redirectTo = htmlHelper.ViewContext.RequestContext.HttpContext.Request.Url.AbsolutePath;pageSize = pageSize == 0 ? 3 : pageSize;var totalPages = Math.Max((totalCount + pageSize - 1) / pageSize, 1);//总页数var output = new StringBuilder();output.Append("<nav>");output.Append("<ul class='pagination'>");string pageSizrWithParameter = string.Empty;if (!string.IsNullOrEmpty(parameterString))pageSizrWithParameter = pageSize + "&" + parameterString;if (totalPages>1){output.AppendFormat("<li><a href='{0}?pageIndex=1&pageSize={1}' aria-label='Previous'><span aria-hidden='true'>&laquo;</span></a></li>",redirectTo,pageSizrWithParameter);if (currentPage > 1)//处理上一页连接output.AppendFormat("<li><a href='{0}?pageIndex={1}&pageSize={2}'>上一页</a></li>",redirectTo,currentPage-1,pageSizrWithParameter);output.Append("");int currint = 5;for (int i = 0; i < 10; i++){//一共最多显示10个页码，前面五个后面五个if ((currentPage+i-currint)>=1 && (currentPage+1-currint)<=totalPages){if (currint == i)//当前页处理output.AppendFormat("<li class='active'><a href='{0}?pageIndex={1}&pageSize={2}'>{3}</a></li>", redirectTo, currentPage, pageSizrWithParameter, currentPage);else//一般页处理output.AppendFormat("<li><a href='{0}?pageIndex={1}&pageSize={2}'>{3}</a></li>",redirectTo,currentPage+i-currint,pageSizrWithParameter,currentPage+i-currint);}output.Append("");}if (currentPage < totalPages)//处理下一页连接output.AppendFormat("<li><a href='{0}?pageIndex={1}&pageSize={2}'>下一页</a></li>", redirectTo, currentPage + 1, pageSizrWithParameter);output.Append("");if (currentPage != totalPages)output.AppendFormat("<li><a href='{0}?pageIndex={1}&pageSize={2}'><span aria-hidden='true'>&raquo;</span></a></li>", redirectTo, totalPages, pageSizrWithParameter);output.Append("");}output.Append("</ul>");output.Append("</nav>");return new HtmlString(output.ToString());}#endregion

View Code

控制器方法（搜索的关键字在Js中拼接出来，然后用window.location="路径?参数="+。。+"&参数="+。。。+"。。。。"）

[HttpGet]
public ActionResult Moments(int pageIndex=1,int pageSize=20)
{int totalRecord=0;List<实体类> list=得到集合方法(pageIndex,pageSize,out totalRecord);ViewData["totalRecord"]=totalRecord;ViewData["pageIndex"]=pageIndex;ViewData["pageSize"]=pageSize;#region 生成搜索状态保存数据StringBuilder sb=new StringBuilder();foreach(string item in Request.QueryString.AllKeys){if(!item.Equals("pageIndex") && !item.Equals("pageSize"))sb.Append(item+"="+Request.QueryString[item]+"&")  } ViewData["parameter"]=sb.ToString().Trim('&');#endregionreturn View(lam);
}

View Code

引用分页

<!--在控制器里面存储的ViewData，totalRecord表示根据添加查询到的数据并返回的条数，parameter表示搜索条件（关键字搜索等等）-->
@Html.PageNavigate(int.Parse(ViewData["pageIndex"].ToString()),int.Parse(ViewData["pageSize"].ToString()),int.Parse(ViewData["totalRecord"].ToString()),ViewData["parameter"].ToString())

DropDownList：（还没有经过测试，只是展示一下思路，我也不清楚理解是否是正确的，求大神们指教一下）

public static HtmlString ExtDropDownList(this HtmlHelper htmlHelper, string name, IEnumerable<SelectListItem> list){TagBuilder select = new TagBuilder("select");TagBuilder option = new TagBuilder("option");if (!select.Attributes.ContainsKey("id") && name!=null)select.GenerateId(name);//添加Id属性if (!String.IsNullOrEmpty(name))select.MergeAttribute("name", name);//添加那么属性//添加节点option.MergeAttribute("value", "0");option.InnerHtml = "--请选择--";select.InnerHtml += option;if (list!=null){foreach (var item in list){option.MergeAttribute("value", item.Value);option.InnerHtml = item.Text;select.InnerHtml += option;}}return new HtmlString(select.ToString());//return ExtDropDownList(htmlHelper, select.ToString(), null);}

View Code

public static HtmlString ExtDropDownList(this HtmlHelper htmlHelper, string name, IEnumerable<SelectListItem> list, IDictionary<string,object> htmlAttribute){TagBuilder select = new TagBuilder("select");TagBuilder option = new TagBuilder("option");if (!select.Attributes.ContainsKey("id") && name != null)select.GenerateId(name);//添加Id属性if (!String.IsNullOrEmpty(name))select.MergeAttribute("name", name);//添加那么属性//添加节点option.MergeAttribute("value", "0");option.InnerHtml = "--请选择--";select.InnerHtml += option;if (list != null){foreach (var item in list){option.MergeAttribute("value", item.Value);option.InnerHtml = item.Text;select.InnerHtml += option;}}select.MergeAttributes(htmlAttribute);return new HtmlString(select.ToString());}

View Code

public static HtmlString ExtDropDownList(this HtmlHelper htmlHelper, string name, string value, IEnumerable<SelectListItem> list, object attribute){TagBuilder select = new TagBuilder("select");TagBuilder option = new TagBuilder("option");if (!select.Attributes.ContainsKey("id") && name != null)select.GenerateId(name);//添加Id属性if (!String.IsNullOrEmpty(name))select.MergeAttribute("name", name);//添加那么属性//添加节点option.MergeAttribute("value", "0");option.InnerHtml = "--请选择--";select.InnerHtml += option;if (list != null){foreach (var item in list){option.MergeAttribute("value", item.Value);option.InnerHtml = item.Text;select.InnerHtml += option;}}return ExtDropDownList(htmlHelper, select.ToString(), null, HtmlHelper.AnonymousObjectToHtmlAttributes(attribute));}

View Code

public static HtmlString ExtDropDownList(this HtmlHelper htmlHelper, string name, string value, IEnumerable<SelectListItem> list){TagBuilder select = new TagBuilder("select");TagBuilder option = new TagBuilder("option");if (!select.Attributes.ContainsKey("id") && name != null)select.GenerateId(name);//添加Id属性if (!String.IsNullOrEmpty(name))select.MergeAttribute("name", name);//添加那么属性//添加节点option.MergeAttribute("value", "0");option.InnerHtml = "--请选择--";select.InnerHtml += option;if (list != null){foreach (var item in list){if (!String.IsNullOrEmpty(value)){if (item.Value == value)option.MergeAttribute("value", value);}elseoption.MergeAttribute("value", item.Value);option.InnerHtml = item.Text;select.InnerHtml += option;}}return new HtmlString(select.ToString());}

View Code

public static HtmlString ExtDropDownList(this HtmlHelper htmlHelper, string name, string value, IEnumerable<SelectListItem> list, IDictionary<string, object> htmlAttribute){TagBuilder select = new TagBuilder("select");TagBuilder option = new TagBuilder("option");if (!select.Attributes.ContainsKey("id") && name != null)select.GenerateId(name);//添加Id属性if (!String.IsNullOrEmpty(name))select.MergeAttribute("name", name);//添加那么属性//添加节点option.MergeAttribute("value", "0");option.InnerHtml = "--请选择--";select.InnerHtml += option;if (list != null){foreach (var item in list){if (!String.IsNullOrEmpty(value)){if (item.Value == value)option.MergeAttribute("value", value);}elseoption.MergeAttribute("value", item.Value);option.InnerHtml = item.Text;select.InnerHtml += option;}}select.MergeAttributes(htmlAttribute);return new HtmlString(select.ToString());}

View Code

public static HtmlHelper ExtDropDownList(this HtmlHelper htmlHelper, string name, string value, IEnumerable<SelectListItem> list, object attribute, IDictionary<string, object> htmlAttribute){TagBuilder select = new TagBuilder("select");TagBuilder option = new TagBuilder("option");if (!select.Attributes.ContainsKey("id") && name != null)select.GenerateId(name);//添加Id属性if (!String.IsNullOrEmpty(name))select.MergeAttribute("name", name);//添加那么属性//添加节点option.MergeAttribute("value", "0");option.InnerHtml = "--请选择--";select.InnerHtml += option;if (list != null){foreach (var item in list){if (!String.IsNullOrEmpty(value)){if (item.Value == value)option.MergeAttribute("value", value);}elseoption.MergeAttribute("value", item.Value);option.InnerHtml = item.Text;select.InnerHtml += option;}}select.MergeAttributes(htmlAttribute);return ExtDropDownList(htmlHelper, select.ToString(), null, null, HtmlHelper.AnonymousObjectToHtmlAttributes(attribute), null);}

View Code

public static HtmlString ExtDropDownList(this HtmlHelper htmlHelper, string name, string value, IEnumerable<SelectListItem> list, object attribute1, object attribute2){TagBuilder select = new TagBuilder("select");TagBuilder option = new TagBuilder("option");if (!select.Attributes.ContainsKey("id") && name != null)select.GenerateId(name);//添加Id属性if (!String.IsNullOrEmpty(name))select.MergeAttribute("name", name);//添加那么属性//添加节点option.MergeAttribute("value", "0");option.InnerHtml = "--请选择--";select.InnerHtml += option;if (list != null){foreach (var item in list){if (!String.IsNullOrEmpty(value)){if (item.Value == value)option.MergeAttribute("value", value);}elseoption.MergeAttribute("value", item.Value);option.InnerHtml = item.Text;select.InnerHtml += option;}}return ExtDropDownList(htmlHelper, select.ToString(), null, null, HtmlHelper.AnonymousObjectToHtmlAttributes(attribute1), HtmlHelper.AnonymousObjectToHtmlAttributes(attribute2));}

View Code

转载于:https://www.cnblogs.com/xibianriluo/p/4852018.html

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Html辅助方法（分页、下拉框）

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