Monday, 9 December 2013

Merge GridView Header Columns Multiple Headers ASP.NET

Here is the example to merge or merging gridView header columns or merging multiple headers in GridView using C# and ASP.NET

For this you need to create GridView header row in RowCreated Event

Source Page : 

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

<!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 id="Head1" runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:GridView ID="grvMergeHeader" runat="server" BackColor="LightGoldenrodYellow"
            BorderColor="Tan" BorderWidth="5px" CellPadding="3" ForeColor="Black" GridLines="None"
            BorderStyle="None" CellSpacing="2" AutoGenerateColumns="False" DataSourceID="SqlDataSource1"
            OnRowCreated="grvMergeHeader_RowCreated">
            <FooterStyle BackColor="Tan" />
            <SelectedRowStyle BackColor="DarkSlateBlue" ForeColor="GhostWhite" />
            <PagerStyle BackColor="PaleGoldenrod" ForeColor="DarkSlateBlue" HorizontalAlign="Center" />
            <HeaderStyle BackColor="Tan" Font-Bold="True" />
            <AlternatingRowStyle BackColor="PaleGoldenrod" />
            <Columns>
                <asp:BoundField DataField="DepartMentID" HeaderText="DepartMentID" SortExpression="DepartMentID" />
                <asp:BoundField DataField="DepartMent" HeaderText="DepartMent" SortExpression="DepartMent" />
                <asp:BoundField DataField="Name" HeaderText="Name" SortExpression="Name" />
                <asp:BoundField DataField="Location" HeaderText="Location" SortExpression="Location" />
            </Columns>
        </asp:GridView>
        <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:ConnectionString %>"
            SelectCommand="SELECT [DepartMentID],
[DepartMent], [Name], [Location] FROM [Employee]"></asp:SqlDataSource>
        &nbsp;</div>
    </form>
</body>
</html>

Code Behind :

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e) { }
    protected void grvMergeHeader_RowCreated
        (object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.Header)
        {
            GridView HeaderGrid = (GridView)sender;
            GridViewRow HeaderGridRow = new GridViewRow(0, 0, DataControlRowType.Header,    DataControlRowState.Insert);
            TableCell HeaderCell = new TableCell();
            HeaderCell.Text = "Department";
            HeaderCell.ColumnSpan = 2;
            HeaderGridRow.Cells.Add(HeaderCell);
            HeaderCell = new TableCell();
            HeaderCell.Text = "Employee";
            HeaderCell.ColumnSpan = 2; HeaderGridRow.Cells.Add(HeaderCell);
            grvMergeHeader.Controls[0].Controls.AddAt(0, HeaderGridRow);
        }
    }
}




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