在更改网格的页面索引时进行排序的问题

问题描述

我有一个gridview，它使用文件夹进行绑定，它具有分页和排序功能。





每次加载页面时，每页只能获得8条记录。所以每当下一页按钮事件触发时。网格将填充该文件夹中的后8条记录。





因为它有排序所以我遇到了问题。网格对所有网格记录进行排序，并希望它只对当前页面中的记录进行排序。





那么我该怎么办呢？

请帮帮我





我正在使用此代码

I have a gridview which get binds using folder it has paging and sorting.


Each time page load it only get 8 records per page. So whenever a next page button event fire. The grid get populated with next 8 records from the folder.


Since it has a sorting so I am facing a problem. The grid get sorts all record of grid and want that it only sorts the records with in the current page.


So what should I do so my sort...
Please help me


I am using this code

readonly Image _sortImage = new Image();
       public string SortDireaction
       {
           get {
               return ViewState["SortDireaction"] != null ? ViewState["SortDireaction"].ToString() : string.Empty;
           }
           set
           {
               ViewState["SortDireaction"] = value;
           }
       }
       private string _sortDirection;
       protected new void Page_Load(object sender, EventArgs e)
       {
           
           BindGrid();
         
       }

protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
       {
           GridView1.PageIndex = e.NewPageIndex;
           GridView1.DataBind();
           BindGrid();
       }

       protected void BindGrid()
       {
           var fl = GetList();
           var dt = EntitySetToDataTable.ConvertEntitySetToDataTable(fl);
           GridView1.DataSource = dt;
           GridView1.DataBind();
       }

       protected void gv_Sorting(object sender, GridViewSortEventArgs e)
       {
           SetSortDirection(SortDireaction);
           var fl = GetList();
           var dt = EntitySetToDataTable.ConvertEntitySetToDataTable(fl);
           dt.DefaultView.Sort = e.SortExpression + " " + _sortDirection;
           GridView1.DataSource = dt;
           GridView1.DataBind();
           SortDireaction = _sortDirection;
           var columnIndex = 0;
           foreach (var headerCell in GridView1.HeaderRow.Cells.Cast<DataControlFieldHeaderCell>().Where(headerCell => headerCell.ContainingField.SortExpression == e.SortExpression))
           {
               columnIndex = GridView1.HeaderRow.Cells.GetCellIndex(headerCell);
           }
           GridView1.HeaderRow.Cells[columnIndex].Controls.Add(_sortImage);
       }

       protected void SetSortDirection(string sortDirection)
       {
           if (sortDirection == "ASC")
           {
               _sortDirection = "DESC";
               _sortImage.ImageUrl = "../Images/desc.png";

           }
           else
           {
               _sortDirection = "ASC";
               _sortImage.ImageUrl = "../Images/asc.png";
           }
       }

       private IEnumerable<FileList> GetList()
       {
           var filePaths = Directory.GetFiles(MainFolder + ddlMainFolder.SelectedValue + "/" + ddlSubFolder.SelectedValue);
           return (from filePath in filePaths
               let fl = new FileInfo(filePath)
               select new FileList
               {
                   FileName = Path.GetFileName(filePath), Download = filePath, FileSize = GetFileLength(fl.Length), FileSizeInBytes = fl.Length, UploadDate = string.Format("{0:g}", fl.CreationTime)
               }).ToList();
       }

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