HtmlHelper Grid 扩展分页为submit 保存查询条件值

1. 扩展Grid让他生成的分页用submit提交
    HZMCRM.Extension
   {
       public class GridEx<T> : Grid<T> where T : class
       {
           public GridEx(IEnumerable<T> items, GridColumnBuilder<T> columns, IDictionary htmlAttributes, TextWriter writer, HttpContextBase context)
               : base(items, columns, htmlAttributes, writer, context)
           {
           }
   
           public GridEx(string viewDataKey, ViewContext viewContext, GridColumnBuilder<T> columns, IDictionary htmlAttributes, TextWriter writer)
               : this(MvcContrib.UI.Html.Grid.Grid<T>.GetDataSourceFromViewData(viewDataKey, viewContext), columns, htmlAttributes, writer, viewContext.HttpContext)
           {
           }
   
           protected override string CreatePageLink(int pageNumber, string text)
           {
               string str = this.CreateQueryString(this.Context.Request.QueryString);
               string filePath = this.Context.Request.FilePath;
               //return string.Format("<a href=\"{0}?{1}={2}{3}\">{4}</a>", new object[] { filePath, pageQueryName(), pageNumber, str, text });
               return string.Format("<a href=\"javascript:window.form1.action='{0}?{1}={2}{3}';window.form1.submit();\">{4}</a>", new object[] { filePath, pageQueryName(), pageNumber, str, text });
           }
   
           private string pageQueryName()
           {
               string _pageQueryName = "page";
   
               if (this.HtmlAttributes.Contains("page"))
               {
                   _pageQueryName = this.HtmlAttributes["page"] as string;
                   this.HtmlAttributes.Remove("page");
               }
   
               return _pageQueryName;
           }
       }
   }
2. 扩展HtmlHelper让其的Html.Grid方法之一能实例化我们新扩展的类GridEx 

 HZMCRM.Extension
{
    public static class GridExEx
    {
        public static void Grid<T>(this HtmlHelper helper, string viewDataKey, Action<IRootGridColumnBuilder<T>> columns, MyExtention postPageLink) where T : class
        {
            new GridEx<T>(viewDataKey, helper.ViewContext, CreateColumnBuilder<T>(columns,null), null, helper.ViewContext.HttpContext.Response.Output).Render();
        } 

        private static GridColumnBuilder<T> CreateColumnBuilder<T>(Action<IRootGridColumnBuilder<T>> columns, Action<IGridSections<T>> sections) where T : class
        {
            GridColumnBuilder<T> builder = new GridColumnBuilder<T>();
            if (columns != null)
            {
                columns(builder);
            }
            if (sections != null)
            {
                sections(builder);
            }
            return builder;
        }

        public enum MyExtention
        {
            PageLink
        }

    }
}