c#关于EXCEL导出数据库的做法

using System;
using System.Diagnostics;
using System.Collections;
using System.Data;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Excel;
using System.Data.OleDb;
namespace Maticsoft.Common
{
/// <summary>
/// 操作EXCEL导出数据报表的类
/// Copyright (C) Maticsoft
/// </summary>
public class DataToExcel
{
public DataToExcel()
{
}

#region 操作EXCEL的一个类(需要Excel.dll支持)

private int titleColorindex = 15;
/// <summary>
/// 标题背景色
/// </summary>
public int TitleColorIndex
{
set { titleColorindex = value; }
get { return titleColorindex; }
}

private DateTime beforeTime; //Excel启动之前时间
private DateTime afterTime; //Excel启动之后时间

#region 创建一个Excel示例
/// <summary>
/// 创建一个Excel示例
/// </summary>
public void CreateExcel()
{
Excel.Application excel = new Excel.Application();
excel.Application.Workbooks.Add(true);
excel.Cells[1, 1] = "第1行第1列";
excel.Cells[1, 2] = "第1行第2列";
excel.Cells[2, 1] = "第2行第1列";
excel.Cells[2, 2] = "第2行第2列";
excel.Cells[3, 1] = "第3行第1列";
excel.Cells[3, 2] = "第3行第2列";

//保存
excel.ActiveWorkbook.SaveAs("./lizitt.xls", XlFileFormat.xlExcel7, null, null, false, false, Excel.XlSaveAsAccessMode.xlNoChange, null, null, null, null, null);
//打开显示
excel.Visible = true;
// excel.Quit();
// excel=null;
// GC.Collect();//垃圾回收
}
#endregion

#region 将DataTable的数据导出显示为报表
/// <summary>
/// 将DataTable的数据导出显示为报表
/// </summary>
/// <param name="dt">要导出的数据</param>
/// <param name="strTitle">导出报表的标题</param>
/// <param name="FilePath">保存文件的路径</param>
/// <returns></returns>
public string OutputExcel(System.Data.DataTable dt, string strTitle, string FilePath)
{
beforeTime = DateTime.Now;

Excel.Application excel;
Excel._Workbook xBk;
Excel._Worksheet xSt;

int rowIndex = 4;
int colIndex = 1;

excel = new Excel.ApplicationClass();
xBk = excel.Workbooks.Add(true);
xSt = (Excel._Worksheet)xBk.ActiveSheet;

//取得列标题
foreach (DataColumn col in dt.Columns)
{
colIndex++;
excel.Cells[4, colIndex] = col.ColumnName;

//设置标题格式为居中对齐
xSt.get_Range(excel.Cells[4, colIndex], excel.Cells[4, colIndex]).Font.Bold = true;
xSt.get_Range(excel.Cells[4, colIndex], excel.Cells[4, colIndex]).HorizontalAlignment = Excel.XlVAlign.xlVAlignCenter;
xSt.get_Range(excel.Cells[4, colIndex], excel.Cells[4, colIndex]).Select();
xSt.get_Range(excel.Cells[4, colIndex], excel.Cells[4, colIndex]).Interior.ColorIndex = titleColorindex;//19;//设置为浅黄色，共计有56种
}

//取得表格中的数据
foreach (DataRow row in dt.Rows)
{
rowIndex++;
colIndex = 1;
foreach (DataColumn col in dt.Columns)
{
colIndex++;
if (col.DataType == System.Type.GetType("System.DateTime"))
{
excel.Cells[rowIndex, colIndex] = (Convert.ToDateTime(row[col.ColumnName].ToString())).ToString("yyyy-MM-dd");
xSt.get_Range(excel.Cells[rowIndex, colIndex], excel.Cells[rowIndex, colIndex]).HorizontalAlignment = Excel.XlVAlign.xlVAlignCenter;//设置日期型的字段格式为居中对齐
}
else
if (col.DataType == System.Type.GetType("System.String"))
{
excel.Cells[rowIndex, colIndex] = "'" + row[col.ColumnName].ToString();
xSt.get_Range(excel.Cells[rowIndex, colIndex], excel.Cells[rowIndex, colIndex]).HorizontalAlignment = Excel.XlVAlign.xlVAlignCenter;//设置字符型的字段格式为居中对齐
}
else
{
excel.Cells[rowIndex, colIndex] = row[col.ColumnName].ToString();
}
}
}

//加载一个合计行
int rowSum = rowIndex + 1;
int colSum = 2;
excel.Cells[rowSum, 2] = "合计";
xSt.get_Range(excel.Cells[rowSum, 2], excel.Cells[rowSum, 2]).HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;
//设置选中的部分的颜色
xSt.get_Range(excel.Cells[rowSum, colSum], excel.Cells[rowSum, colIndex]).Select();
//xSt.get_Range(excel.Cells[rowSum,colSum],excel.Cells[rowSum,colIndex]).Interior.ColorIndex =Assistant.GetConfigInt("ColorIndex");// 1;//设置为浅黄色，共计有56种

//取得整个报表的标题
excel.Cells[2, 2] = strTitle;

//设置整个报表的标题格式
xSt.get_Range(excel.Cells[2, 2], excel.Cells[2, 2]).Font.Bold = true;
xSt.get_Range(excel.Cells[2, 2], excel.Cells[2, 2]).Font.Size = 22;

//设置报表表格为最适应宽度
xSt.get_Range(excel.Cells[4, 2], excel.Cells[rowSum, colIndex]).Select();
xSt.get_Range(excel.Cells[4, 2], excel.Cells[rowSum, colIndex]).Columns.AutoFit();

//设置整个报表的标题为跨列居中
xSt.get_Range(excel.Cells[2, 2], excel.Cells[2, colIndex]).Select();
xSt.get_Range(excel.Cells[2, 2], excel.Cells[2, colIndex]).HorizontalAlignment = Excel.XlHAlign.xlHAlignCenterAcrossSelection;

//绘制边框
xSt.get_Range(excel.Cells[4, 2], excel.Cells[rowSum, colIndex]).Borders.LineStyle = 1;
xSt.get_Range(excel.Cells[4, 2], excel.Cells[rowSum, 2]).Borders[Excel.XlBordersIndex.xlEdgeLeft].Weight = Excel.XlBorderWeight.xlThick;//设置左边线加粗
xSt.get_Range(excel.Cells[4, 2], excel.Cells[4, colIndex]).Borders[Excel.XlBordersIndex.xlEdgeTop].Weight = Excel.XlBorderWeight.xlThick;//设置上边线加粗
xSt.get_Range(excel.Cells[4, colIndex], excel.Cells[rowSum, colIndex]).Borders[Excel.XlBordersIndex.xlEdgeRight].Weight = Excel.XlBorderWeight.xlThick;//设置右边线加粗
xSt.get_Range(excel.Cells[rowSum, 2], excel.Cells[rowSum, colIndex]).Borders[Excel.XlBordersIndex.xlEdgeBottom].Weight = Excel.XlBorderWeight.xlThick;//设置下边线加粗

afterTime = DateTime.Now;

//显示效果
// excel.Visible=true;
//excel.Sheets[0] = "sss";

ClearFile(FilePath);
string filename = DateTime.Now.ToString("yyyyMMddHHmmssff") + ".xls";
excel.ActiveWorkbook.SaveAs(FilePath + filename, Excel.XlFileFormat.xlExcel7, null, null, false, false, Excel.XlSaveAsAccessMode.xlNoChange, null, null, null, null, null);

//打开显示
//excel.Visible = true;
// excel.Quit();
// excel=null;
// GC.Collect();//垃圾回收
//wkbNew.SaveAs strBookName;
//excel.Save(strExcelFileName);

#region 结束Excel进程

//需要对Excel的DCOM对象进行配置:dcomcnfg

//excel.Quit();
//excel=null;

xBk.Close(null, null, null);
excel.Workbooks.Close();
excel.Quit();

//注意：这里用到的所有Excel对象都要执行这个操作，否则结束不了Excel进程
// if(rng != null)
// {
// System.Runtime.InteropServices.Marshal.ReleaseComObject(rng);
// rng = null;
// }
// if(tb != null)
// {
// System.Runtime.InteropServices.Marshal.ReleaseComObject(tb);
// tb = null;
// }
if (xSt != null)
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(xSt);
xSt = null;
}
if (xBk != null)
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(xBk);
xBk = null;
}
if (excel != null)
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(excel);
excel = null;
}
GC.Collect();//垃圾回收
#endregion

return filename;

}
#endregion

#region Kill Excel进程

/// <summary>
/// 结束Excel进程
/// </summary>
public void KillExcelProcess()
{
Process[] myProcesses;
DateTime startTime;
myProcesses = Process.GetProcessesByName("Excel");

//得不到Excel进程ID，暂时只能判断进程启动时间
foreach (Process myProcess in myProcesses)
{
startTime = myProcess.StartTime;
if (startTime > beforeTime && startTime < afterTime)
{
myProcess.Kill();
}
}
}
#endregion

#endregion

#region 将DataTable的数据导出显示为报表(不使用Excel对象，使用COM.Excel)

#region 使用示例
/*使用示例：
* DataSet ds=(DataSet)Session["AdBrowseHitDayList"];
string ExcelFolder=Assistant.GetConfigString("ExcelFolder");
string FilePath=Server.MapPath(".")+"\\"+ExcelFolder+"\\";

//生成列的中文对应表
Hashtable nameList = new Hashtable();
nameList.Add("ADID", "广告编码");
nameList.Add("ADName", "广告名称");
nameList.Add("year", "年");
nameList.Add("month", "月");
nameList.Add("browsum", "显示数");
nameList.Add("hitsum", "点击数");
nameList.Add("BrowsinglIP", "独立IP显示");
nameList.Add("HitsinglIP", "独立IP点击");
//利用excel对象
DataToExcel dte=new DataToExcel();
string filename="";
try
{
if(ds.Tables[0].Rows.Count>0)
{
filename=dte.DataExcel(ds.Tables[0],"标题",FilePath,nameList);
}
}
catch
{
//dte.KillExcelProcess();
}

if(filename!="")
{
Response.Redirect(ExcelFolder+"\\"+filename,true);
}
*
* */

#endregion

/// <summary>
/// 将DataTable的数据导出显示为报表(不使用Excel对象)
/// </summary>
/// <param name="dt">数据DataTable</param>
/// <param name="strTitle">标题</param>
/// <param name="FilePath">生成文件的路径</param>
/// <param name="nameList"></param>
/// <returns></returns>
public string DataExcel(System.Data.DataTable dt, string strTitle, string FilePath, Hashtable nameList)
{
COM.Excel.cExcelFile excel = new COM.Excel.cExcelFile();
ClearFile(FilePath);
string filename = DateTime.Now.ToString("yyyyMMddHHmmssff") + ".xls";
excel.CreateFile(FilePath + filename);
excel.PrintGridLines = false;

COM.Excel.cExcelFile.MarginTypes mt1 = COM.Excel.cExcelFile.MarginTypes.xlsTopMargin;
COM.Excel.cExcelFile.MarginTypes mt2 = COM.Excel.cExcelFile.MarginTypes.xlsLeftMargin;
COM.Excel.cExcelFile.MarginTypes mt3 = COM.Excel.cExcelFile.MarginTypes.xlsRightMargin;
COM.Excel.cExcelFile.MarginTypes mt4 = COM.Excel.cExcelFile.MarginTypes.xlsBottomMargin;

double height = 1.5;
excel.SetMargin(ref mt1, ref height);
excel.SetMargin(ref mt2, ref height);
excel.SetMargin(ref mt3, ref height);
excel.SetMargin(ref mt4, ref height);

COM.Excel.cExcelFile.FontFormatting ff = COM.Excel.cExcelFile.FontFormatting.xlsNoFormat;
string font = "宋体";
short fontsize = 9;
excel.SetFont(ref font, ref fontsize, ref ff);

byte b1 = 1,
b2 = 12;
short s3 = 12;
excel.SetColumnWidth(ref b1, ref b2, ref s3);

string header = "页眉";
string footer = "页脚";
excel.SetHeader(ref header);
excel.SetFooter(ref footer);

COM.Excel.cExcelFile.ValueTypes vt = COM.Excel.cExcelFile.ValueTypes.xlsText;
COM.Excel.cExcelFile.CellFont cf = COM.Excel.cExcelFile.CellFont.xlsFont0;
COM.Excel.cExcelFile.CellAlignment ca = COM.Excel.cExcelFile.CellAlignment.xlsCentreAlign;
COM.Excel.cExcelFile.CellHiddenLocked chl = COM.Excel.cExcelFile.CellHiddenLocked.xlsNormal;

// 报表标题
int cellformat = 1;
// int rowindex = 1,colindex = 3;
// object title = (object)strTitle;
// excel.WriteValue(ref vt, ref cf, ref ca, ref chl,ref rowindex,ref colindex,ref title,ref cellformat);

int rowIndex = 1;//起始行
int colIndex = 0;

//取得列标题
foreach (DataColumn colhead in dt.Columns)
{
colIndex++;
string name = colhead.ColumnName.Trim();
object namestr = (object)name;
IDictionaryEnumerator Enum = nameList.GetEnumerator();
while (Enum.MoveNext())
{
if (Enum.Key.ToString().Trim() == name)
{
namestr = Enum.Value;
}
}
excel.WriteValue(ref vt, ref cf, ref ca, ref chl, ref rowIndex, ref colIndex, ref namestr, ref cellformat);
}

//取得表格中的数据
foreach (DataRow row in dt.Rows)
{
rowIndex++;
colIndex = 0;
foreach (DataColumn col in dt.Columns)
{
colIndex++;
if (col.DataType == System.Type.GetType("System.DateTime"))
{
object str = (object)(Convert.ToDateTime(row[col.ColumnName].ToString())).ToString("yyyy-MM-dd"); ;
excel.WriteValue(ref vt, ref cf, ref ca, ref chl, ref rowIndex, ref colIndex, ref str, ref cellformat);
}
else
{
object str = (object)row[col.ColumnName].ToString();
excel.WriteValue(ref vt, ref cf, ref ca, ref chl, ref rowIndex, ref colIndex, ref str, ref cellformat);
}
}
}
int ret = excel.CloseFile();

// if(ret!=0)
// {
// //MessageBox.Show(this,"Error!");
// }
// else
// {
// //MessageBox.Show(this,"请打开文件c:\\test.xls!");
// }
//打开显示
return filename;

}

#endregion

#region 清理过时的Excel文件

private void ClearFile(string FilePath)
{
String[] Files = System.IO.Directory.GetFiles(FilePath);
if (Files.Length > 10)
{
for (int i = 0; i < 10; i++)
{
try
{
System.IO.File.Delete(Files[i]);
}
catch
{
}

}
}
}
#endregion

public DataSet ExecleDs(string filenameurl)
{
filenameurl = "D:/cypShow/file/test.xls";

string strConn = "Provider=Microsoft.Jet.OleDb.4.0;" + "data source=" +filenameurl+ ";Extended Properties='Excel 8.0; HDR=YES; IMEX=1'";
OleDbConnection conn = new OleDbConnection(strConn);
OleDbDataAdapter odda = new OleDbDataAdapter("select * from [Sheet1$]",conn);
DataSet ds = new DataSet();
odda.Fill(ds);
return ds;
}

}
}