关于SQL导出EXCEL的问题

[bll123456]

小弟最近需要把数据库的一张表导出至EXCEL，因为以前没弄过，所以呢我就上网找呀找，找到了一个最基本的方法，语句如下：

EXEC master..xp_cmdshell 'bcp STEPWMS.dbo.MstBOMDetail out f:\test.xls -c -q -S"Database" /U"sa" -P""'

小弟我是相当兴奋，一运行，结果显示如下：

output
-----------------------------------------------------------------------------NULL
开始复制...
NULL
已复制 3 行。
网络数据包大小(字节): 4096
总时钟时间(毫秒) : 1 平均值: (每秒 3000.00 行。)
NULL

(7 行受影响)

于是我去F：盘下找那可爱的TEST.XLS，可是没有，我又运行了N次，可是怎么也没有，然后我继续上网找，就是没有解决呀，于是我就来向各位大侠请教了。

请各位高人不吝赐教！！在下必当叩谢！

[xingyuan96]

没有试过用SQL导出EXCEL,可以先查处数据,用DataTable导出EXCEL:

using System;
using System.Windows.Forms;
using System.Data;
using System.Collections;
using System.IO;
using System.Diagnostics;

namespace CHUmanager.MoonCake.Common
{
/// <summary>
/// DataSetToExcel 的摘要说明。
/// </summary>
public class DataSetToExcel
{
private DateTime beforeTime; //Excel启动之前时间
private DateTime afterTime; //Excel启动之后时间
public DataSetToExcel()
{
//
// TODO: 在此处添加构造函数逻辑
//
}


/// <summary>
/// 导出到Excel
/// </summary>
/// <param name="filename">为要保存的excel文件名</param>
/// <param name="dt">dt为关联grid的DataTable</param>
/// <param name="excelname">excelname为excel表的标题</param>
public bool ExportToExcel(string filename,DataTable dt,string excelname)
{

if(dt==null) return false;

string saveFileName="";
bool fileSaved=false;
SaveFileDialog saveDialog=new SaveFileDialog();
saveDialog.DefaultExt ="xls";
saveDialog.Filter="Excel文件|*.xls";
saveDialog.FileName =filename;
saveDialog.ShowDialog();
saveFileName=saveDialog.FileName;
if(saveFileName.IndexOf(":")<0) return false; //被点了取消

beforeTime = DateTime.Now;//Excel启动之前时间
Excel.Application xlApp=new Excel.Application();
afterTime = DateTime.Now;//Excel启动之后时间

if(xlApp==null)
{
MessageBox.Show("无法创建Excel对象，可能您的机子未安装Excel");
return false;
}

Excel.Workbooks workbooks=xlApp.Workbooks;
Excel.Workbook workbook=workbooks.Add(Excel.XlWBATemplate.xlWBATWorksheet);
Excel.Worksheet worksheet=(Excel.Worksheet)workbook.Worksheets[1];//取得sheet1
Excel.Range range;


long totalCount=dt.Rows.Count;
long rowRead=0;
float percent=0;

//合并单元格
Excel.Range rH = worksheet.get_Range("A1",intToString(dt.Columns.Count)+"1");
rH.Merge(0);
//写如标题
worksheet.Cells[1,1]=excelname;
//标题样式
range=(Excel.Range)worksheet.Cells[1,1];
range.Interior.ColorIndex = 15;
range.Font.Size = 14;
range.Font.Name = "隶书";
range.Font.Bold = true;
range.HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;
//写入字段
for(int i=0;i<dt.Columns.Count;i++)
{
worksheet.Cells[2,i+1]=dt.Columns[i].ColumnName;
//获取字段样式
range=(Excel.Range)worksheet.Cells[2,i+1];
range.Font.Bold = true;

}
//写入数值
for(int r=0;r<dt.Rows.Count;r++)
{
for(int i=0;i<dt.Columns.Count;i++)
{
worksheet.Cells[r+3,i+1]=dt.Rows[r][i];
}
rowRead++;
percent=((float)(100*rowRead))/totalCount;
System.Windows.Forms .Application.DoEvents();
}

range=worksheet.get_Range(worksheet.Cells[2,1],worksheet.Cells[dt.Rows.Count+2,dt.Columns.Count]);
range.BorderAround(Excel.XlLineStyle.xlContinuous,Excel.XlBorderWeight.xlThin,Excel.XlColorIndex.xlColorIndexAutomatic,null);

range.Borders[Excel.XlBordersIndex.xlInsideHorizontal].ColorIndex = Excel.XlColorIndex.xlColorIndexAutomatic;
range.Borders[Excel.XlBordersIndex.xlInsideHorizontal].LineStyle =Excel.XlLineStyle.xlContinuous;
range.Borders[Excel.XlBordersIndex.xlInsideHorizontal].Weight =Excel.XlBorderWeight.xlThin;

if(dt.Columns.Count>1)
{
range.Borders[Excel.XlBordersIndex.xlInsideVertical].ColorIndex =Excel.XlColorIndex.xlColorIndexAutomatic;
range.Borders[Excel.XlBordersIndex.xlInsideVertical].LineStyle = Excel.XlLineStyle.xlContinuous;
range.Borders[Excel.XlBordersIndex.xlInsideVertical].Weight = Excel.XlBorderWeight.xlThin;
}

if(saveFileName!="")
{
try
{
workbook.Saved =true;
workbook.SaveCopyAs(saveFileName);
fileSaved=true;
}
catch(Exception ex)
{
fileSaved=false;
MessageBox.Show("导出文件时出错,文件可能正被打开！\n"+ex.Message);
}
}
else
{
fileSaved=false;
}
xlApp.Quit();
GC.Collect();//强行销毁,经测试这句话并没有结束Excel进程
KillExcelProcess();//强制结束进程
//用Excel打开文件
//if(fileSaved&&File.Exists(saveFileName))System.Diagnostics.Process.Start(saveFileName);
return fileSaved;
}
/// <summary>
/// 数字转字符。如：1转A 2转B
/// </summary>
/// <param name="num">要转换的数字,最大为26,最小为1</param>
/// <returns></returns>
private string intToString(int num)
{
if (num>26 || num<1)
{
return null;
}
string[] str = new string[26];
str[0] = "A";
str[1] = "B";
str[2] = "C";
str[3] = "D";
str[4] = "E";
str[5] = "F";
str[6] = "G";
str[7] = "H";
str[8] = "I";
str[9] = "J";
str[10] = "K";
str[11] = "L";
str[12] = "M";
str[13] = "N";
str[14] = "O";
str[15] = "P";
str[16] = "Q";
str[17] = "R";
str[18] = "S";
str[19] = "T";
str[20] = "U";
str[21] = "V";
str[22] = "W";
str[23] = "S";
str[24] = "Y";
str[25] = "Z";
return str[num-1];
}

/// <summary>
/// 结束Excel进程
/// </summary>
private 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();
}
}
}
}
}