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();
}
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