ASP.NET GridView Fix Header!

GridView Markup

Below is the GridView Markup

<div id = "container" style ="height:200px;overflow:auto;width:617px ">

<asp:GridView ID="GridView1" runat="server"

    AutoGenerateColumns = "false" CssClass = "grid">

   <Columns>

    <asp:BoundField ItemStyle-Width = "200px"

    DataField = "CustomerID" HeaderText = "CustomerId" />

    <asp:BoundField ItemStyle-Width = "200px"

    DataField = "City" HeaderText = "City"/>

    <asp:BoundField ItemStyle-Width = "200px"

    DataField = "Country" HeaderText = "Country"/>

   </Columns>

</asp:GridView>

</div>

You will notice above I have placed the GridView inside a DIV of fixed height and width and setting its overflow property to auto so that the scrollbars are available. Also I have set the width of the Div slightly more than the GridView so that the horizontal scrollbar is hidden and it can accommodate the vertical scrollbar.

 

Binding the GridView

Below are the methods to Bind the GridView control with data

C#

private void BindGrid()

{

    DataTable dt = new DataTable();

    String strConnString = System.Configuration.ConfigurationManager

                .ConnectionStrings["conString"].ConnectionString;

    SqlConnection con = new SqlConnection(strConnString);

    SqlDataAdapter sda = new SqlDataAdapter();

    SqlCommand cmd = new SqlCommand("select * from customers");

    cmd.Connection = con;

    sda.SelectCommand = cmd;

    sda.Fill(dt);

    GridView1.DataSource = dt;

    GridView1.DataBind();

    GridView1.HeaderRow.Attributes["style"] = "display:none";

    GridView1.UseAccessibleHeader = true;

    GridView1.HeaderRow.TableSection = TableRowSection.TableHeader;

}

VB.Net

Private Sub BindGrid()

 Dim dt As New DataTable()

 Dim strConnString As [String] = System.Configuration.ConfigurationManager _

                    .ConnectionStrings("conString").ConnectionString

 Dim con As New SqlConnection(strConnString)

 Dim sda As New SqlDataAdapter()

 Dim cmd As New SqlCommand("select * from customers")

 cmd.Connection = con

 sda.SelectCommand = cmd

 sda.Fill(dt)

 GridView1.DataSource = dt

 GridView1.DataBind()

 GridView1.HeaderRow.Attributes("style") = "display:none"

 GridView1.UseAccessibleHeader = True

 GridView1.HeaderRow.TableSection = TableRowSection.TableHeader

End Sub

Above after binding the GridView I am hiding the GridView header row by setting its display to none. If you set ShowHeader to false it will break the working of sorting library. In the next statements I am modifying the GridView settings so that it renders with THEAD and TBODY tags which are necessary for the library in order to sort a table

 

Building the Dummy Header

For preparing the dummy header we will need to extract the header row of the GridView as shown in the screenshot

Now complete paste it above the GridView and remove display:none so that the dummy header is visible, I have also provided ID to the dummy header table and your dummyHeader and the scrollable GridView is ready

CSS

Add the following CSS to the head section of the page

<style type = "text/css">

    .sortAsc

    {

        background-image: url(images/asc.gif);

        background-repeat: no-repeat;

        background-position: center right;

        cursor: pointer;

        width:200px;

    }

    .sortDesc

    {

        background-image: url(images/desc.gif);

        background-repeat: no-repeat;

        background-position: center right;

        cursor: pointer;

        width:200px;

    }

    .grid

    {

        font-family:Arial;

        font-size:10pt;

        width:600px

    }

    .grid THEAD

    {

         background-color:Green;

         color:White;

    }

</style>

 

Client Side Sorting

Now for the Client Side Script I have used the tablesorter jQuery Plugin which will be used to sort the GridView control. Hence add the following scripts to your page

<script src="scripts/jquery-1.3.2.min.js" type="text/javascript"></script>

<script src="scripts/jquery.tablesorter.min.js" type="text/javascript"></script>

<script type = "text/javascript">

    $(document).ready(function() {

    $("#<%=GridView1.ClientID%>").tablesorter();

        SetDefaultSortOrder();

    });

 

    function Sort(cell, sortOrder) {

        var sorting = [[cell.cellIndex, sortOrder]];

        $("#<%=GridView1.ClientID%>").trigger("sorton", [sorting]);

        if (sortOrder == 0) {

            sortOrder = 1;

            cell.className = "sortDesc";

        }

        else {

            sortOrder = 0;

            cell.className = "sortAsc";

        }

        cell.setAttribute("onclick", "Sort(this, " + sortOrder + ")");
        cell.onclick = function() { Sort(this, sortOrder); };

        document.getElementById("container").scrollTop = 0;

    }

 

    function SetDefaultSortOrder() {

        var gvHeader = document.getElementById("dummyHeader");

        var headers = gvHeader.getElementsByTagName("TH");

        for (var i = 0; i < headers.length; i++) {

            headers[i].setAttribute("onclick", "Sort(this, 1)");
            headers[i].onclick = function() { Sort(this, 1); };

            headers[i].className = "sortDesc";
        }

    }

</script>

All the client side methods are explained below

The following method notifies the tablesorter library the ID of the control that needs to be sorted and also calls theSetDefaultSortOrder method to set the default sort order.

    $(document).ready(function() {

    $("#<%=GridView1.ClientID%>").tablesorter();

        SetDefaultSortOrder();

    });

 

The following function as the name suggests sets the default sort order for the GridView in the dummy header that we’ve created earlier

function SetDefaultSortOrder() {

        var gvHeader = document.getElementById("dummyHeader");

        var headers = gvHeader.getElementsByTagName("TH");

        for (var i = 0; i < headers.length; i++) {

            headers[i].setAttribute("onclick", "Sort(this, 1)");
            headers[i].onclick = function() { Sort(this, 1); };

            headers[i].className = "sortDesc";
        }

}

 

This function get’s called when user clicks on the header row for sorting it accepts the cell and the sort order in which the grid needs to be sorted.

function Sort(cell, sortOrder) {

        var sorting = [[cell.cellIndex, sortOrder]];

        $("#<%=GridView1.ClientID%>").trigger("sorton", [sorting]);

        if (sortOrder == 0) {

            sortOrder = 1;

            cell.className = "sortDesc";

        }

        else {

            sortOrder = 0;

            cell.className = "sortAsc";

        }

        cell.setAttribute("onclick", "Sort(this, " + sortOrder + ")");
        cell.onclick = function() { Sort(this, sortOrder); };

        document.getElementById("container").scrollTop = 0;

}

 

Checkout the demo GridView below

CustomerId	City	Country

ALFKI	Berlin	Germany
ANATR	México D.F.	Mexico
ANTON	México D.F.	Mexico
AROUT	London	UK
BERGS	Luleå	Sweden
BLAUS	Mannheim	Germany
BLONP	Strasbourg	France
BOLID	Madrid	Spain
BONAP	Marseille	France
BOTTM	Tsawassen	Canada
BSBEV	London	UK
CACTU	Buenos Aires	Argentina
CENTC	México D.F.	Mexico
CHOPS	Bern	Switzerland
COMMI	Sao Paulo	Brazil
CONSH	London	UK
DRACD	Aachen	Germany
DUMON	Nantes	France
EASTC	London	UK
ERNSH	Graz	Austria
FAMIA	Sao Paulo	Brazil
FISSA	Madrid	Spain
FOLIG	Lille	France
FOLKO	Bräcke	Sweden
FRANK	München	Germany
FRANR	Nantes	France
FRANS	Torino	Italy
FURIB	Lisboa	Portugal
GALED	Barcelona	Spain
GODOS	Sevilla	Spain
GOURL	Campinas	Brazil
GREAL	Eugene	USA
GROSR	Caracas	Venezuela
HANAR	Rio de Janeiro	Brazil
HILAA	San Cristóbal	Venezuela
HUNGC	Elgin	USA
HUNGO	Cork	Ireland
ISLAT	Cowes	UK
KOENE	Brandenburg	Germany
LACOR	Versailles	France
LAMAI	Toulouse	France
LAUGB	Vancouver	Canada
LAZYK	Walla Walla	USA
LEHMS	Frankfurt a.M.	Germany
LETSS	San Francisco	USA
LILAS	Barquisimeto	Venezuela
LINOD	I. de Margarita	Venezuela
LONEP	Portland	USA
MAGAA	Bergamo	Italy
MAISD	Bruxelles	Belgium
MEREP	Montréal	Canada
MORGK	Leipzig	Germany
NORTS	London	UK
OCEAN	Buenos Aires	Argentina
OLDWO	Anchorage	USA
OTTIK	Köln	Germany
PARIS	Paris	France
PERIC	México D.F.	Mexico
PICCO	Salzburg	Austria
PRINI	Lisboa	Portugal
QUEDE	Rio de Janeiro	Brazil
QUEEN	Sao Paulo	Brazil
QUICK	Cunewalde	Germany
RANCH	Buenos Aires	Argentina
RATTC	Albuquerque	USA
REGGC	Reggio Emilia	Italy
RICAR	Rio de Janeiro	Brazil
RICSU	Genève	Switzerland
ROMEY	Madrid	Spain
SANTG	Stavern	Norway
SAVEA	Boise	USA
SEVES	London	UK
SIMOB	Kobenhavn	Denmark
SPECD	Paris	France
SPLIR	Lander	USA
SUPRD	Charleroi	Belgium
THEBI	Portland	USA
THECR	Butte	USA
TOMSP	Münster	Germany
TORTU	México D.F.	Mexico
TRADH	Sao Paulo	Brazil
TRAIH	Kirkland	USA
VAFFE	Århus	Denmark
VICTE	Lyon	France
VINET	Reims	France
WANDK	Stuttgart	Germany
WARTH	Oulu	Finland
WELLI	Resende	Brazil
WHITC	Seattle	USA
WILMK	Helsinki	Finland
WOLZA	Warszawa	Poland

The above code has been tested in the following browsers

         

Author: Mudassar Khan

Good Luck`..

Posted in: ASP.NET,How To?,Tips n Tricks