<asp:DataList runat="server" id="datalist1" RepeatColumns="4" RepeatDirection="Horizontal">
<ItemTemplate>
<table border="0" cellpadding="0" cellspacing="0">
<tr>
<td>
<img  src="<%=DataBinder.Eval(Container.DataItem,"Image_name")%>" width="90" height="90">
   </td>
  </tr>
</table>
</ItemTemplate>
</asp:DataList>

<table border="0" width="410">
<tr>
<td align="left">
<asp:LinkButton ID="lbPrev" Runat="server">
Prev
</asp:LinkButton>
</td>
<td align="right">
<asp:LinkButton ID="lbNext" Runat="server">
Next
</asp:LinkButton> 
</td>
</tr>
</table>

binddatalist()
{
// use PageDatasource object for paging  purpose..

PagedDataSource Page = new PagedDataSource();
try
{
 
 DataSet ds = ds // ds is your datasource..
 Page.AllowPaging = true;

//page object store the datasource of datalist..
 Page.DataSource = ds.Tables[0].DefaultView; 
 Page.PageSize = 8;
     
 //"CurrentPage" is global variable that content the current page index..
 Page.CurrentPageIndex = CurrentPage;  

 dlGallery.DataSource = Page;
 dlGallery.DataKeyField = "Image_ID";
 dlGallery.DataBind();
 //now datalist only show the a images... 
 //due to "Page.PageSize = 8;" statement...

//visible true or false of next and previous button
//according to last and first page...
lbtnNext.Enabled = !objPage.IsLastPage;
lbtnPrev.Enabled = !objPage.IsFirstPage;
}
    
catch(Exception ex)
{
 throw ex;
}

}

private void lbPrev_Click(object sender, System.EventArgs e)

{
 CurrentPage -=1;
 //"CurrentPage" is global variable that content the current page index..
 BindList();
}

private void lbNext_Click(object sender, System.EventArgs e)

{
 CurrentPage +=1;
//"CurrentPage" is global variable that content the current page index..
 BindList();
}