Fixing a Header in Datagrid

raj8696, S.Rajeshwar

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3.75/5 (3 votes)

25 Jun 2009CPOL1 min read

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A simple way to fix the Datagrid header using JavaScript and CSS

TestScrollingDG.zip
- App_Code
  - DataGridSource.cs
- App_Data
- FixedHeaderDatagrid.aspx
- FixedHeaderDatagrid.aspx.cs
- web.config

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="FixedHeaderDatagrid.aspx.cs" Inherits="Default2" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Scrolling Header for Datagrid</title>
    <script type="text/javascript" language="javascript">
        function setonScroll(divObj,DgID)  // call this in onscroll event in div
        {
            var datagrid = document.getElementById(DgID);
            var HeaderCells = datagrid.getElementsByTagName('th');
            var HeaderRow;
            if(HeaderCells == null || HeaderCells.length == 0)     // check wether any tableheader cells present in given datagrid
            {
                var AllRows = datagrid.getElementsByTagName('tr');
                HeaderRow = AllRows[0];        
            }
            else
            {
                HeaderRow = HeaderCells[0].parentNode;        
            }            
            
            var DivsTopPosition = parseInt(divObj.scrollTop);
            
            if(DivsTopPosition>0)
            {
                HeaderRow.style.position = 'absolute';
                HeaderRow.style.top = (parseInt(DivsTopPosition)).toString() + 'px';
                HeaderRow.style.width = datagrid.style.width;                
                HeaderRow.style.zIndex='1000';
            }
            else
            {
                divObj.scrollTop = 0;
                HeaderRow.style.position = 'relative';
                HeaderRow.style.top = '0';
                HeaderRow.style.bottom='0';
                HeaderRow.style.zIndex='0';                
            }
        }
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div id="Div" runat="server" style="position:relative; top:0px; left:0px; height:500px; width:250px; overflow:auto">
    <asp:DataGrid ID="dgCheckScrollingHeader" runat="server" Width="410px" AutoGenerateColumns="False" CellSpacing="1"  CellPadding="0" ForeColor="#333333" GridLines="vertical">
        <Columns>
            <asp:TemplateColumn HeaderText="Column 1">
                <ItemTemplate>
                    <asp:Label ID="lblCol1Data" Width="130px" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"Col1Data") %>' ></asp:Label>
                </ItemTemplate>
                <HeaderStyle Width="150px" />
                <ItemStyle Width="150px" />
            </asp:TemplateColumn>
            <asp:TemplateColumn HeaderText="Column 2">
                <ItemTemplate>
                    <asp:Label ID="lblCol2Data" Width="170px" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"Col2Data") %>' ></asp:Label>
                </ItemTemplate>
                <HeaderStyle Width="180px" />
                <ItemStyle Width="180px" />
            </asp:TemplateColumn>
            <asp:TemplateColumn HeaderText="Column 3">
                <ItemTemplate>
                    <asp:Label ID="lblCol3Data" Width="70px" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"Col3Data") %>' ></asp:Label>
                </ItemTemplate>
                <HeaderStyle Width="80px" />
                <ItemStyle Width="80px" />
            </asp:TemplateColumn>
        </Columns>        
        <AlternatingItemStyle BackColor="White" />
        <ItemStyle BackColor="#EFF3FB" />
        <HeaderStyle BackColor="#507CD1" Font-Bold="True" Height="25px" Font-Size="15px" ForeColor="White" HorizontalAlign="Center" Wrap="false" />
    </asp:DataGrid>
    </div>
    </form>
</body>
</html>

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Written By

raj8696

Web Developer

India

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