Gridview Custom Paging and Sorting in Asp.net

Introduction
Today we are working with GridView custom sorting and paging without using any datasource control in Asp.net. Gridview is flexible enough to perform these tasks without the use of any datasource control and only a few lines of code. For paging a Gridview manually we have to handle the Gridview’s PageIndexChanged Event. In the event we need to change the PageIndex of Gridview to the page that user has clicked and again bind the Gridview.
Gridview Paging.

protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)

 {

      GridView1.PageIndex = e.NewPageIndex;

      GridView1.AllowPaging = true;

      GridView1.PageSize = 3;    

      GridView1.DataBind();

 }

This is all you need to do to make manual paging in the Gridview.

Gridview Sorting

protected void GridView1_Sorting(object sender, GridViewSortEventArgs e)

 {

      DataTable _dataTable = GridView1.DataSource as DataTable;

      if (_dataTable != null)

       {

          DataView _dataView = new DataView(_dataTable);

          _dataView.Sort=e.SortExpression + "" + getDirection(e.SortDirection);

          GridView1.DataSource=_dataView;

          GridView1.DataBind();

       }

 }

   

private string getDirection(SortDirection _sortDirection)

 {

      string _newDirection = string.Empty;

      if (_sortDirection == SortDirection.Ascending)

      {

          _newDirection = "ASC";

      }

      else

      {

          _newDirection = "DESC";

      }

      return _newDirection;

 }

And we have the manual sorting for the Gridview.