将DataTable和图片导出到Excel中

1.功能说明

a.将DataTable数据和表头完整导入Excel,其位置可以随意定.如B4,A1...

b.将图片导入到Excel中,并指定导入Excel的位置.如B5,C6...

c.按钮为Button.且可以像HyperLink一样,弹出对话框,让用户将其导出(打开,保存,取消)

 

2.调用类

 

using System;
using System.Web;
using System.IO;
using System.Data;
using Excel = Microsoft.Office.Interop.Excel;

namespace DataToExcel
{
 /// <summary>
 /// DataToExcel 的摘要说明。
 /// </summary>
 public class DataToExcel
 {
  /// <summary>
  /// 打开没有模板的操作。
  /// </summary>
  public void Open( )
  {
   this.Open(String.Empty);
  }

  /// <summary>
  /// 功能:实现Excel应用程序的打开
  /// </summary>
  /// <param name="TemplateFilePath">模板文件物理路径</param>
  public void Open( string TemplateFilePath )
  {
   //打开对象
   m_objExcel = new Excel.Application();
   m_objExcel.Visible = false;
   m_objExcel.DisplayAlerts = false;

   if (m_objExcel.Version != "11.0")
   {
    //    MessageBox.Show("您的 Excel 版本不是 11.0 (Office 2003),操作可能会出现问题。");
    m_objExcel.Quit();
    return;
   }

   m_objBooks = (Excel.Workbooks)m_objExcel.Workbooks;
   if (TemplateFilePath.Equals(String.Empty))
   {
    m_objBook = (Excel._Workbook)(m_objBooks.Add(m_objOpt));
   }
   else
   {
    m_objBook = m_objBooks.Open(TemplateFilePath, m_objOpt, m_objOpt, m_objOpt, m_objOpt,
     m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt);
   }
   m_objSheets = (Excel.Sheets)m_objBook.Worksheets;
   m_objSheet = (Excel._Worksheet)(m_objSheets.get_Item(1));
   m_objExcel.WorkbookBeforeClose += new Excel.AppEvents_WorkbookBeforeCloseEventHandler(m_objExcel_WorkbookBeforeClose);
  }

  private void m_objExcel_WorkbookBeforeClose( Excel.Workbook m_objBooks, ref bool _Cancel )
  {
   //   MessageBox.Show("保存完毕!");
  }

  /// <summary>
  /// 将图片插入到指定的单元格位置。
  /// 注意:图片必须是绝对物理路径
  /// </summary>
  /// <param name="RangeName">单元格名称,例如:B4</param>
  /// <param name="PicturePath">要插入图片的绝对路径。</param>
  public void InsertPicture( string RangeName, string PicturePath )
  {
   m_objRange = m_objSheet.get_Range(RangeName, m_objOpt);
   m_objRange.Select();
   Excel.Pictures pics = (Excel.Pictures)m_objSheet.Pictures(m_objOpt);
   pics.Insert(PicturePath, m_objOpt);
  }

  /// <summary>
  /// 将图片插入到指定的单元格位置,并设置图片的宽度和高度。
  /// 注意:图片必须是绝对物理路径
  /// </summary>
  /// <param name="RangeName">单元格名称,例如:B4</param>
  /// <param name="PicturePath">要插入图片的绝对路径。</param>
  /// <param name="PictuteWidth">插入后,图片在Excel中显示的宽度。</param>
  /// <param name="PictureHeight">插入后,图片在Excel中显示的高度。</param>
  public void InsertPicture( string RangeName, string PicturePath, float PictuteWidth, float PictureHeight )
  {
   m_objRange = m_objSheet.get_Range(RangeName, m_objOpt);
   m_objRange.Select();
   float PicLeft, PicTop;
   PicLeft = Convert.ToSingle(m_objRange.Left);
   PicTop = Convert.ToSingle(m_objRange.Top);
   //参数含义:
   //图片路径
   //是否链接到文件
   //图片插入时是否随文档一起保存
   //图片在文档中的坐标位置(单位:points)
   //图片显示的宽度和高度(单位:points)
   m_objSheet.Shapes.AddPicture(PicturePath, Microsoft.Office.Core.MsoTriState.msoFalse,
    Microsoft.Office.Core.MsoTriState.msoTrue, PicLeft, PicTop, PictuteWidth, PictureHeight);
  }

  /// <summary>
  /// 将DataTable插入Excel中.
  /// </summary>
  /// <param name="RangeName">插入的位置.比如:A1</param>
  /// <param name="dt">插入的表</param>
  public void DataTableToExcel( string RangeName, DataTable dt)
  {
   int rowIndex=1;
   int colIndex=0;
 
   foreach(DataColumn col in dt.Columns)
   {
    colIndex++;
    m_objExcel.Cells[rowIndex,colIndex] = col.ColumnName;
   }

   foreach(DataRow row in dt.Rows)
   {
    rowIndex++;
    for(int i = 1; i <= dt.Columns.Count; i++)
    {
     m_objExcel.Cells[rowIndex,i] = row[i-1];
    }
   }   
  }
  /// <summary>
  /// 将Excel文件保存到指定的目录,目录必须事先存在,文件名称不一定要存在。
  /// </summary>
  /// <param name="OutputFilePath">要保存成的文件的全路径。</param>
  public void SaveFile( string OutputFilePath )
  {
   m_objBook.SaveAs(OutputFilePath, m_objOpt, m_objOpt,
    m_objOpt, m_objOpt, m_objOpt, Excel.XlSaveAsAccessMode.xlNoChange,
    m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt);

   this.Close();
  }
  /// <summary>
  /// 关闭应用程序
  /// </summary>
  private void Close( )
  {
   m_objBook.Close(false, m_objOpt, m_objOpt);
   m_objExcel.Quit();
  }

  /// <summary>
  /// 释放所引用的COM对象。注意:这个过程一定要执行。
  /// </summary>
  public void Dispose( )
  {
   ReleaseObj(m_objSheets);
   ReleaseObj(m_objBook);
   ReleaseObj(m_objBooks);
   ReleaseObj(m_objExcel);
   System.GC.Collect();
   System.GC.WaitForPendingFinalizers();
  }
  /// <summary>
  /// 释放对象,内部调用
  /// </summary>
  /// <param name="o"></param>
  private void ReleaseObj( object o )
  {
   try
   {
    System.Runtime.InteropServices.Marshal.ReleaseComObject(o);
   }
   catch { }
   finally { o = null; }
  }

  /// <summary>
  /// 從WEB頁面文件下載
  /// </summary>
  /// <param name="strFile">要下載的文件的絕對路徑 </param>
  public void DownloadFile(string strFile)
  {
   HttpContext.Current.Response.Clear();
   HttpContext.Current.Response.ContentType = "application/octet-stream";
   HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment;filename=\"" + HttpUtility.UrlEncode(Path.GetFileName(strFile).Trim()) + "\"");
   HttpContext.Current.Response.Flush();

   HttpContext.Current.Response.WriteFile(strFile);
   HttpContext.Current.Response.End();
  }

  private Excel.Application m_objExcel = null;
  private Excel.Workbooks m_objBooks = null;
  private Excel._Workbook m_objBook = null;
  private Excel.Sheets m_objSheets = null;
  private Excel._Worksheet m_objSheet = null;
  private Excel.Range m_objRange = null;
  private object m_objOpt = System.Reflection.Missing.Value; 
 }
}

 

3.调用样例.

private void btnExport_Click(object sender, System.EventArgs e)
  {
   DataToExcel dte =new DataToExcel();

   dte.Open();
   
   DataTable dt=(DataTable)ViewState["Table"];

   dte.DataTableToExcel("B1",dt);

   string txtimge = this.txtImg.Text.Trim();

   string imag = txtimge.Substring(txtimge.IndexOf("dnc-"),16);

   dte.InsertPicture("B4",Server.MapPath("~/Temp/" + imag));

   dte.SaveFile(Server.MapPath("~/Temp/ziping.xls"));   

   dte.DownloadFile(Server.MapPath("~/Temp/ziping.xls"));

   dte.Dispose();
  }

 

希望对大家有所帮助,请回个帖!呵呵.....

posted on 2009-12-01 10:57  秋天  阅读(5160)  评论(8编辑  收藏

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