HtmlHelper的扩展

向右看齐 2022-05-22 08:56 183阅读 0赞

注意点：扩展方法必须是静态方法，所在的类必须是静态类，所在的命名空间改成System.Web.MVC则能省略页面中必须添加命名空间的约束。  
//主要就是输出分页的超级链接的标签  
//自定义分页Helper扩展

public static HtmlString ShowPageNavigate(this HtmlHelper htmlHelper, int currentPage, int pageSize, int totalCount)
            {
                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();
                if (totalPages > 1)
                {
                    //if (currentPage != 1)
                    {//处理首页连接
                        output.AppendFormat("<a class='pageLink' href='{0}?pageIndex=1&pageSize={1}'>首页</a> ", redirectTo, pageSize);
                    }
                    if (currentPage > 1)
                    {//处理上一页的连接
                        output.AppendFormat("<a class='pageLink' href='{0}?pageIndex={1}&pageSize={2}'>上一页</a> ", redirectTo, currentPage - 1, pageSize);
                    }
                    else
                    {
                       // output.Append("<span class='pageLink'>上一页</span>");
                    }
    
                    output.Append(" ");
                    int currint = 5;
                    for (int i = 0; i <= 10; i++)
                    {//一共最多显示10个页码，前面5个，后面5个
                        if ((currentPage + i - currint) >= 1 && (currentPage + i - currint) <= totalPages)
                        {
                            if (currint == i)
                            {//当前页处理
                                //output.Append(string.Format("[{0}]", currentPage));
                                output.AppendFormat("<a class='cpb' href='{0}?pageIndex={1}&pageSize={2}'>{3}</a> ", redirectTo, currentPage , pageSize, currentPage );
                            }
                            else
                            {//一般页处理
                                output.AppendFormat("<a class='pageLink' href='{0}?pageIndex={1}&pageSize={2}'>{3}</a> ", redirectTo, currentPage + i - currint, pageSize, currentPage + i - currint);
                            }
                        }
                        output.Append(" ");
                    }
                    if (currentPage < totalPages)
                    {//处理下一页的链接
                        output.AppendFormat("<a class='pageLink' href='{0}?pageIndex={1}&pageSize={2}'>下一页</a> ", redirectTo, currentPage + 1, pageSize);
                    }
                    else
                    {
                        //output.Append("<span class='pageLink'>下一页</span>");
                    }
                    output.Append(" ");
                    if (currentPage != totalPages)
                    {
                        output.AppendFormat("<a class='pageLink' href='{0}?pageIndex={1}&pageSize={2}'>末页</a> ", redirectTo, totalPages, pageSize);
                    }
                    output.Append(" ");
                }
                output.AppendFormat("第{0}页 / 共{1}页", currentPage, totalPages);//这个统计加不加都行
    
                return new HtmlString(output.ToString());
            }
    		
    		//样式部分：
    		body
    {
    }
    
    .paginator
    {
        font: 12px Arial, Helvetica, sans-serif;
        padding: 10px 20px 10px 0;
        margin: 0px;
    }
    
    .paginator a
    {
        border: solid 1px #ccc;
        color: #0063dc;
        cursor: pointer;
        text-decoration: none;
    }
    
    .paginator a:visited
    {
        padding: 1px 6px;
        border: solid 1px #ddd;
        background: #fff;
        text-decoration: none;
    }
    
    .paginator .cpb
    {
        border: 1px solid #F50;
        font-weight: 700;
        color: #F50;
        background-color: #ffeee5;
    }
    
    .paginator a:hover
    {
        border: solid 1px #F50;
        color: #f60;
        text-decoration: none;
    }
    
    .paginator a, .paginator a:visited, .paginator .cpb, .paginator a:hover
    {
        float: left;
        height: 16px;
        line-height: 16px;
        min-width: 10px;
        _width: 10px;
        margin-right: 5px;
        text-align: center;
        white-space: nowrap;
        font-size: 12px;
        font-family: Arial,SimSun;
        padding: 0 3px;
    }