Asp.Net下的DataGrid的多层表头详细些

<HTML>
    <HEAD>
        <title>MergeHeader</title>
        <meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
        <meta name="CODE_LANGUAGE" Content="C#">
        <meta name="vs_defaultClientScript" content="JavaScript">
        <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
    </HEAD>
    <body MS_POSITIONING="GridLayout">
        <form id="Form1" method="post" runat="server">
            <asp:datagrid id="DataGrid1" style="Z-INDEX: 101; LEFT: 8px; POSITION: absolute; TOP: 8px" runat="server"
                BorderColor="Tan" BorderWidth="1px" BackColor="LightGoldenrodYellow" CellPadding="1" ForeColor="Black"
                CellSpacing="1">
                <FooterStyle BackColor="Tan"></FooterStyle>
                <SelectedItemStyle ForeColor="GhostWhite" BackColor="DarkSlateBlue"></SelectedItemStyle>
                <AlternatingItemStyle BackColor="PaleGoldenrod"></AlternatingItemStyle>
                <HeaderStyle Font-Bold="True" BackColor="Tan"></HeaderStyle>
                <PagerStyle HorizontalAlign="Center" ForeColor="DarkSlateBlue" BackColor="PaleGoldenrod"></PagerStyle>
            </asp:datagrid>
        </form>
    </body>
</HTML>
public class MergeHeader : System.Web.UI.Page
    {
        private DataGrid m_dgDatagridToDecorate = null;
        private ArrayList m_arrHeaderCells = null;
        protected System.Web.UI.WebControls.DataGrid DataGrid1;
        private Hashtable m_htblRowspanIndex = new Hashtable();        private void Page_Load(object sender, System.EventArgs e)
        {
            if(!this.IsPostBack)
            {
                MergeGrid();
            }
        }        AddMergeHeader#region AddMergeHeader
        private void AddMergeHeader(ArrayList arrHeaderCells)
        {
            m_arrHeaderCells =arrHeaderCells;
        }

               private DataGrid DatagridToDecorate
        {
            get
            {
                return m_dgDatagridToDecorate;
            }
            set
            {
                if(null != m_dgDatagridToDecorate)
                {
                    m_dgDatagridToDecorate.ItemCreated -= new DataGridItemEventHandler(DatagridToDecorate_ItemCreated);
                }
                m_dgDatagridToDecorate = value;
                m_dgDatagridToDecorate.ItemCreated += new DataGridItemEventHandler(DatagridToDecorate_ItemCreated);
            }
        }
                DatagridToDecorate_ItemCreated#region DatagridToDecorate_ItemCreated
        private void DatagridToDecorate_ItemCreated(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
        {

            ListItemType lit = e.Item.ItemType;
            if(ListItemType.Header == lit)
            {
                               e.Item.SetRenderMethodDelegate(new RenderMethod(NewRenderMethod));
            }
        }
        #endregion                NewRenderMethod#region NewRenderMethod
        private void NewRenderMethod(HtmlTextWriter writer, Control ctl)
        {
            int iCurrIndex = 0;
            for(int i=0; i<m_arrHeaderCells.Count; i++)
            {
                TableCell item = (TableCell)m_arrHeaderCells[i];
                if(item.ColumnSpan > 1)
                {
                    iCurrIndex += item.ColumnSpan-1;
                }
                if(item.RowSpan > 1)
                {
                    m_htblRowspanIndex.Add(iCurrIndex + i, iCurrIndex + i);
                }
                item.RenderControl(writer);
            }
            writer.WriteEndTag("TR");

            m_dgDatagridToDecorate.HeaderStyle.AddAttributesToRender(writer);
                     writer.RenderBeginTag("TR");
                        for(int i=0; i< ctl.Controls.Count; i++)
            {
                if((null == m_htblRowspanIndex[i]))
                {
                    ctl.Controls[i].RenderControl(writer);
                }
            }

        }              GetData#region GetData
        private DataTable GetData()
        {
            DataTable dt;
            dt = new DataTable();            dt.Columns.Add("Code");
            dt.Columns.Add("FName");
            dt.Columns.Add("MName");
            dt.Columns.Add("LName");
            dt.Columns.Add("Age");
            dt.Columns.Add("Elementary");
            dt.Columns.Add("Junior");
            dt.Columns.Add("High");
            dt.Columns.Add("Religion");            for(int i=1; i <= 12; i++)
            {
                DataRow dr = dt.NewRow();                dr["Code"] = "Code" + i.ToString();
                dr["FName"] = "FName" + i.ToString();
                dr["MName"] = "MName" + i.ToString();
                dr["LName"] = "LName" + i.ToString();
                dr["Age"] = "Age" + i.ToString();
                dr["Elementary"] = "Elementary" + i.ToString();
                dr["Junior"] = "Junior" + i.ToString();
                dr["High"] = "High" + i.ToString();
                dr["Religion"] = "Religion" + i.ToString();                dt.Rows.Add(dr);
            }
            return dt;
        }

        private void MergeGrid()
        {
            TableCell cell = null;            DatagridToDecorate = DataGrid1;
            ArrayList header = new ArrayList();                                            cell = new TableCell();
            cell.Text = "Name";
            cell.RowSpan = 2;
            cell.HorizontalAlign = HorizontalAlign.Center;
            header.Add(cell);            cell = new TableCell();
            cell.Text = "Name";
            cell.ColumnSpan = 3;
            cell.HorizontalAlign = HorizontalAlign.Center;
            header.Add(cell);            cell = new TableCell();
            cell.Text = "Age";
            cell.RowSpan = 2;
            cell.HorizontalAlign = HorizontalAlign.Center;
            header.Add(cell);            cell = new TableCell();
            cell.Text = "School";
            cell.ColumnSpan = 3;
            cell.HorizontalAlign = HorizontalAlign.Center;
            header.Add(cell);            cell = new TableCell();
            cell.Text = "Religion";
            cell.RowSpan = 2;
            cell.HorizontalAlign = HorizontalAlign.Center;
            header.Add(cell);            AddMergeHeader(header);            DataGrid1.DataSource = GetData();
            DataGrid1.DataBind();
        }
                     Web Form Designer generated code#region Web Form Designer generated code
        override protected void OnInit(EventArgs e)
        {

            InitializeComponent();
            base.OnInit(e);
        }


        private void InitializeComponent()
        {
            this.Load += new System.EventHandler(this.Page_Load);        }
        #endregion
    }

转自小山的blog
http://singlepine.cnblogs.com/articles/282990.html

用LgxGrid就很简单了。
————————————————————————————————————
欢迎试用lgxgrid表格控件，内置强大的格式控制和打印功能，内置通过XML与WebService服务交换数据的便捷方法（开发基于B/S的WEB应用程序很有用），有详尽的中文帮助文档，有基于VB6、C#、ASP.net、VC++的例程！欢迎访问http://lgxyslldw.512j.com

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DataGrid显示双层表头
假设你的DataGrid有三列，现在想将前两列作为"大类1"，第三列作为"大类2"，现在，你可以在ItemDataBound事件中加入下面的代码：
if (e.Item.ItemType == ListItemType.Header)
{
e.Item.Cells[0].ColumnSpan = 2;
e.Item.Cells[0].Text = "大类1</td><td>大类2</td></tr><tr><td>" + e.Item.Cells[0].Text;
}
用这个方法可以为任意添加新行。

调试易

Asp.Net下的DataGrid的多层表头详细些

解决方案 »