GridView複合多層表頭(不限級)!!!

頭定義說明：
        表頭定義方法:相鄰父列頭之間用'#'分隔,上級行與下級行用空格(' ')分隔,相鄰未級子列頭用逗號分隔(',').
表頭定義樣本：
A.兩層

煙葉等級#層級#保山市 保山,小計#楚雄州 姚安,小計#大理州 賓川,大理,小計#紅河州 建水,瀘西,彌勒,石屏,小計#昆明市 富民,祿勸,小計#麗江市 華坪,寧蒗,小計#臨滄市 滄源,鳳慶,耿馬,臨翔,雙江,永德,雲縣,鎮康,小計#普洱市 景東,思茅,鎮沅,小計#曲靖市 富源,陸良,羅平,師宗,宣威,小計#文山州 文山,小計#玉溪市 玉溪,小計#總計
B.三層

 

等級#層級#上期結存 件數,重量,比例#本期調入 收購調入 件數,重量,比例#本期發出 車間投料 件數,重量,比例#本期發出 產品外銷百分比 件數,重量,比例#平均值

調用說明:使用時在GridView的RowCreated事件中加入下面代碼調用

        if (e.Row.RowType == DataControlRowType.Header)
        ...{
            DynamicTHeaderHepler dHelper = new DynamicTHeaderHepler();
            string header = "等級#層級#上期結存 件數,重量,比例#本期調入 收購調入 件數,重量,比例#本期發出 車間投料 件數,重量,"
                          + "比例#本期發出 產品外銷百分比 件數,重量,比例#平均值";

            dHelper.SplitTableHeader(e.Row, header);
        }
表頭產生類：

//
//***********************************************************************
//  Created: 2007-10-29    Author:  ruijc
//  File: DynamicTHeaderHepler.cs
//  Description: 動態產生複合表頭協助類
//  相鄰父列頭之間用'#'分隔,父列頭與子列頭用空格(' ')分隔,相鄰子列頭用逗號分隔(',').
//***********************************************************************
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;
using System.Collections.Generic;
using System.Collections;
public class DynamicTHeaderHepler
...{
    public DynamicTHeaderHepler()
    ...{
        //
        // TODO: Add constructor logic here
        //
    }

    /**//// <summary>
    /// 重寫表頭
    /// </summary>
    /// <param name="targetHeader">目標表頭</param>
    /// <param name="newHeaderNames">新表頭</param>
    /// <remarks>
    /// 等級#層級#上期結存 件數,重量,比例#本期調入 收購調入 件數,重量,比例#本期發出 車間投料 件數,重量,
    /// 比例#本期發出 產品外銷百分比 件數,重量,比例#平均值
    /// </remarks>
    public void SplitTableHeader(GridViewRow targetHeader, string newHeaderNames)...{
        TableCellCollection tcl = targetHeader.Cells;//獲得表頭元素的執行個體
        tcl.Clear();//清除元素
        int row = GetRowCount(newHeaderNames);
        int col = GetColCount(newHeaderNames);
        string[,] nameList = ConvertList(newHeaderNames,row,col);
        int RowSpan = 0;
        int ColSpan = 0;
        for (int k = 0; k < row; k++)
        ...{
            string LastFName = "";
            for (int i = 0; i < col; i++)
            ...{
                if (LastFName == nameList[i, k] && k!=row-1)
                ...{
                    LastFName = nameList[i, k];
                    continue;
                }
                else
                ...{
                    LastFName = nameList[i, k];
                }
                int bFlag=IsVisible(nameList, k, i, LastFName);
                switch (bFlag)
                ...{
                    case 0:
                        break;
                    case 1:
                        RowSpan = GetSpanRowCount(nameList,row, k, i);
                        ColSpan = GetSpanColCount(nameList,row,col, k, i);
                        tcl.Add(new TableHeaderCell());//添加表頭控制項
                        tcl[tcl.Count - 1].RowSpan = RowSpan;
                        tcl[tcl.Count - 1].ColumnSpan = ColSpan;
                        tcl[tcl.Count - 1].HorizontalAlign = HorizontalAlign.Center;
                        tcl[tcl.Count - 1].Text = LastFName;
                        break;
                    case -1:
                        string[] EndColName = LastFName.Split(new char[] ...{ ',' });
                        foreach(string eName in EndColName)...{
                            tcl.Add(new TableHeaderCell());//添加表頭控制項
                            tcl[tcl.Count - 1].HorizontalAlign = HorizontalAlign.Center;
                            tcl[tcl.Count - 1].Text = eName;
                        }
                        break;
                }
            }
            if (k != row-1)
            ...{//不是起始行,加入新列標籤
                tcl[tcl.Count - 1].Text = tcl[tcl.Count - 1].Text+"</th></tr><tr>";
            }
        }
    }

    /**//// <summary>
    /// 如果上一行已經輸出和當前內容相同的列頭，則不顯示
    /// </summary>
    /// <param name="ColumnList">表頭集合</param>
    /// <param name="rowIndex">行索引</param>
    /// <param name="colIndex">列索引</param>
    /// <returns>1:顯示,-1:含','分隔字元,0:不顯示</returns>
    private int IsVisible(string[,] ColumnList,int rowIndex, int colIndex,string CurrName)
    ...{
        if (rowIndex!=0)...{
            if (ColumnList[colIndex,rowIndex-1]==CurrName)...{
                return 0;
            }else...{
                if (ColumnList[colIndex, rowIndex].Contains(","))
                ...{
                    return -1;
                }else...{
                    return 1;
                }
            }
        }
        return 1;
    }

    /**//// <summary>
    /// 取得和當前索引行及列對應的下級的內容所跨的行數
    /// </summary>
    /// <param name="ColumnList">表頭集合</param>
    /// <param name="row">行數</param>
    /// <param name="rowIndex">行索引</param>
    /// <param name="colIndex">列索引</param>
    /// <returns>行數</returns>
    private int GetSpanRowCount(string[,] ColumnList, int row,int rowIndex, int colIndex)
    ...{
        string LastName = "";
        int RowSpan = 1;
        for (int k = rowIndex; k < row; k++)
        ...{
            if (ColumnList[colIndex,k]==LastName)...{
                RowSpan++;
            }else...{
                LastName = ColumnList[colIndex, k];
            }
        }
        return RowSpan;
    }

    /**//// <summary>
    /// 取得和當前索引行及列對應的下級的內容所跨的列數
    /// </summary>
    /// <param name="ColumnList">表頭集合</param>
    /// <param name="row">行數</param>
    /// <param name="col">列數</param>
    /// <param name="rowIndex">行索引</param>
    /// <param name="colIndex">列索引</param>
    /// <returns>列數</returns>
    private int GetSpanColCount(string[,] ColumnList,int row, int col,int rowIndex, int colIndex)...{
        string LastName = ColumnList[colIndex, rowIndex] ;
        int ColSpan = ColumnList[colIndex, row-1].Split(new char[] ...{ ',' }).Length;
        ColSpan = ColSpan == 1 ? 0 : ColSpan;
        for(int i=colIndex+1;i<col;i++)...{
            if (ColumnList[i, rowIndex] == LastName)
            ...{
                ColSpan += ColumnList[i, row - 1].Split(new char[] ...{ ',' }).Length;
            }
            else
            ...{
                LastName = ColumnList[i, rowIndex];
                break;
            }
        }
        return ColSpan;
    }

    /**//// <summary>
    /// 將已定義的表頭儲存到數組
    /// </summary>
    /// <param name="newHeaders">新表頭</param>
    /// <param name="row">行數</param>
    /// <param name="col">列數</param>
    /// <returns>表頭數組</returns>
    private string[,] ConvertList(string newHeaders, int row, int col)
    ...{
        string[] ColumnNames = newHeaders.Split(new char[] ...{ '#' });
        string[,] news = new string[col, row];
        string Name = "";
        for (int i = 0; i < col; i++)
        ...{
            string[] CurrColNames = ColumnNames[i].ToString().Split(new char[] ...{ ' ' });
            for (int k = 0; k < row; k++)
            ...{
                if (CurrColNames.Length - 1 >= k)
                ...{
                    if (CurrColNames[k].Contains(","))
                    ...{
                        if (CurrColNames.Length != row)
                        ...{
                            if (Name == "")
                            ...{
                                news[i, k] = news[i, k - 1];
                                Name = CurrColNames[k].ToString();
                            }
                            else
                            ...{
                                news[i, k + 1] = Name;
                                Name = "";
                            }
                        }else...{
                            news[i, k] = CurrColNames[k].ToString();
                        }
                    }else...{
                        news[i, k] = CurrColNames[k].ToString();
                    }
                }else...{
                    if (Name == "")
                    ...{
                        news[i, k] = news[i, k - 1];
                    }else...{

                        news[i, k] = Name;
                        Name = "";
                    }
                }
            }
        }
        return news;
    }

    /**//// <summary>
    /// 取得複合表頭的行數
    /// </summary>
    /// <param name="newHeaders">新表頭</param>
    /// <returns>行數</returns>
    private int GetRowCount(string newHeaders)
    ...{
        string[] ColumnNames = newHeaders.Split(new char[] ...{ '#' });
        int Count = 0;
        foreach(string name in ColumnNames)...{
            int TempCount = name.Split(new char[] ...{ ' ' }).Length;
            if (TempCount > Count)
                Count = TempCount;
        }
        return Count;
    }

    /**//// <summary>
    /// 取得複合表頭的列數
    /// </summary>
    /// <param name="newHeaders">新表頭</param>
    /// <returns>列數</returns>
    private int GetColCount(string newHeaders)...{
        return newHeaders.Split(new char[] ...{ '#' }).Length;
    }
  
}

http://blog.csdn.net/aoeagle/archive/2008/02/20/2108567.aspx