C#怎么读取Excel的数据
有哪位大哥用C#读取Excel的数据呢?有没有相关的实例指导一下?
论坛里好少相关的资料! --------------------编程问答-------------------- 其实就跟读取数据库数据一样
http://www.csharpwin.com/csharpspace/6809r1243.shtml
http://www.cnblogs.com/tuyile006/archive/2006/10/25/395586.html --------------------编程问答-------------------- --------------------编程问答-------------------- http://www.e-iceblue.com --------------------编程问答-------------------- DataTable dt = null;
string connetionStr = "Provider=Microsoft.Ace.OleDb.12.0;" + "Data Source=" + url + ";" + "Extended Properties='Excel 12.0;HDR=Yes;IMEX=1';";
string strSql = "select xx from [Sheet1$]";
OleDbConnection oleConn = new OleDbConnection(connetionStr);
OleDbDataAdapter oleAdapter = new OleDbDataAdapter(strSql, connetionStr);
try
{
dt = new DataTable();
oleAdapter.Fill(dt);
return dt;
}
参考,根据版本修改红色某些具体值 --------------------编程问答-------------------- 有几种方法方法:
1. OLEDB
http://blog.csdn.net/weiqian000/article/details/4204826
2. Office Com组件
参考
http://www.codeproject.com/Articles/5123/Opening-and-Navigating-Excel-with-C
3第三方控件。
找crackdung,他对这方面比较熟悉。 --------------------编程问答-------------------- 怎么一些常见的问题都要在这问呢 自己百度下 就有一大堆 老是想 连搜搜都懒的做的话 还指望你动脑子吗? --------------------编程问答--------------------
+1 --------------------编程问答-------------------- 有几种方法方法:
1. OLEDB
http://blog.csdn.net/weiqian000/article/details/4204826
2. Office Com组件
参考
http://www.codeproject.com/Articles/5123/Opening-and-Navigating-Excel-with-C
3第三方控件。
找crackdung,他对这方面比较熟悉。
看到我也说两句,我用的是把ddatatgridview里面的数据存到excle中,我用的是office com这种方法,导出到是能导出,但是速度确实很慢,数据不多(也就不到一屏)就可以看到明显的停留,我看别人的程序做的都挺好的,不知道是我写的不好,还是可以优化,还是有好方法,谢谢(我主要是导出的数据希望能快)
--------------------编程问答-------------------- 请搜索ReadExcel,会有你的答案的,有一个是忽略Excel环境的 --------------------编程问答--------------------
应该是我问的不准确,我想实现在窗体键入关键字的时候,可以读取并筛选Excel,并列出该关键字同行的一些数据。 --------------------编程问答-------------------- 用OLEDB不怎么好..
有个开源的ExcelLibrary.dll处理不错的,而且服务器不用装excel都可以. --------------------编程问答-------------------- 看看这个例子可不可以
首先先添加项目引用:
1. .NET->System.Data.OracleClient.dll
2. COM->Microsoft Excel 11.0 Object Library
载编写代码如下:
using System;
using System.IO;
using System.Data;
using System.Reflection;
using System.Diagnostics;
using System.Configuration;
using System.Collections;
using Excel;
namespace ProtoType
{
///
/// 套用模板输出Excel,生成xls文件和html文件
/// Author: Liu Wen
/// Date Created: 2006-8
///
public class ExportExcel
{
#region variable member
protected string templateFile = null;
protected string excelFile = null;
protected string htmlFile = null;
protected object missing = Missing.Value;
Excel.ApplicationClass app;
Excel.Workbook book;
Excel.Worksheet sheet;
Excel.Range range;
private DateTime beforeTime; //Excel启动之前时间
private DateTime afterTime; //Excel启动之后时间
#endregion
///
/// 构造函数,将一个已有Excel工作簿作为模板,并指定输出路径
///
/// Excel模板文件路径
/// Excel输出文件路径
/// Html输出文件路径
public ExportExcel(string templateFile, string excelFile, string htmlFile)
{
if(templateFile == null)
throw new Exception("Excel模板文件路径不能为空!");
if(excelFile == null)
throw new Exception("Excel输出文件路径不能为空!");
if(htmlFile == null)
throw new Exception("Html输出文件路径不能为空!");
if(!File.Exists(templateFile))
throw new Exception("指定路径的Excel模板文件不存在!");
this.templateFile = templateFile;
this.excelFile = excelFile;
this.htmlFile = htmlFile;
//创建一个Application对象
beforeTime = DateTime.Now;
app = new ApplicationClass();
//app.Visible = true;
afterTime = DateTime.Now;
//打开模板文件,得到WorkBook对象
try
{
book = app.Workbooks.Open(templateFile,missing,missing,missing,missing,missing,
missing,missing,missing,missing,missing,missing,missing,missing,missing);
}
catch (Exception e)
{
throw e;
}
//得到WorkSheet对象
sheet = (Excel.Worksheet)book.Sheets.get_Item(1);
}
///
/// 将DataTable数据导出到Excel(可动态插入行)
///
/// DataTable
/// 插入行的索引
/// 插入列的索引
public void DataTableToExcel(System.Data.DataTable dt, int rowIndex, int colIndex)
{
//range = sheet.get_Range("A7", missing);
//range.Value2 = "raogerrr";
//string str = range.Text.ToString();
int rowCount = dt.Rows.Count; //DataTable行数
int colCount = dt.Columns.Count; //DataTable列数
int iRow;
int iCol;
//将数据导出到相应的单元格
for (iRow = 0; iRow < rowCount; iRow++)
{
//插入新行
this.InsertRows(sheet, iRow+rowIndex);
//填充当前行
for (iCol = 0; iCol < colCount; iCol++)
{
sheet.Cells[iRow+rowIndex, iCol+colIndex] = dt.Rows[iRow][iCol].ToString();
}
}
this.DeleteRows(sheet, rowCount+rowIndex);
//Excel.QueryTables qts = sheet.QueryTables;
//Excel.QueryTable qt = qts.Add(,,);
//qt.RefreshStyle = Excel.XlCellInsertionMode.xlInsertEntireRows;
//qt.Refresh();
}
///
/// 将DataTable数据导出到Excel(可动态插入行)
///
/// DataTable
/// 插入数据的起始单元格
public void DataTableToExcel(System.Data.DataTable dt, string cellID)
{
int rowIndex = sheet.get_Range(cellID, missing).Row;
int colIndex = sheet.get_Range(cellID, missing).Column;
int rowCount = dt.Rows.Count; //DataTable行数
int colCount = dt.Columns.Count; //DataTable列数
int iRow;
int iCol;
//利用二维数组批量写入
string[,] array = new string[rowCount,colCount];
for (iRow = 0; iRow < rowCount; iRow++)
{
for (iCol = 0; iCol < colCount; iCol++)
{
array[iRow,iCol] = dt.Rows[iRow][iCol].ToString();
}
}
for (iRow = 0; iRow < rowCount; iRow++)
{
this.InsertRows(sheet, iRow+rowIndex);
}
this.DeleteRows(sheet, rowCount+rowIndex);
range = sheet.get_Range(cellID, missing);
range = range.get_Resize(rowCount, colCount);
range.Value2 = array;
}
///
/// 将DataTable数据导出到Excel(固定)
///
/// DataTable
/// 插入数据的起始单元格
public void DataTableToExcel2(System.Data.DataTable dt, string cellID)
{
int rowCount = dt.Rows.Count; //DataTable行数
int colCount = dt.Columns.Count; //DataTable列数
int iRow;
int iCol;
//利用二维数组批量写入
string[,] array = new string[rowCount,colCount];
for (iRow = 0; iRow < rowCount; iRow++)
{
for (iCol = 0; iCol < colCount; iCol++)
{
array[iRow,iCol] = dt.Rows[iRow][iCol].ToString();
}
}
range = sheet.get_Range(cellID, missing);
range = range.get_Resize(rowCount, colCount);
range.Value2 = array;
}
///
/// 输出生成的Excel, Html文件
///
public void OutputFile()
{
if (this.excelFile == null)
throw new Exception("没有指定Excel输出文件路径!");
if (this.htmlFile == null)
throw new Exception("没有指定Htmll输出文件路径!");
try
{
book.SaveAs(excelFile, missing, missing, missing, missing, missing,
Excel.XlSaveAsAccessMode.xlExclusive, missing, missing, missing, missing,missing);
book.SaveAs(htmlFile, Excel.XlFileFormat.xlHtml, missing, missing, missing, missing,
Excel.XlSaveAsAccessMode.xlNoChange, missing, missing, missing, missing, missing);
}
catch (Exception e)
{
throw e;
}
finally
{
this.Dispose();
}
}
///
/// 在工作表中插入行,并调整其他行以留出空间
///
/// 当前工作表
/// 欲插入的行索引
private void InsertRows(Excel.Worksheet sheet, int rowIndex)
{
Range r = (Excel.Range)sheet.Rows[rowIndex, missing];
//object Range.Insert(object shift, object copyorigin);
//shift: Variant类型,可选。指定单元格的调整方式。可以为下列 XlInsertShiftDirection 常量之一:
//xlShiftToRight 或 xlShiftDown。如果省略该参数,Microsoft Excel 将根据区域形状确定调整方式。
r.Insert(Excel.XlInsertShiftDirection.xlShiftDown, missing);
}
///
/// 在工作表中删除行
///
/// 当前工作表
/// 欲删除的行索引
private void DeleteRows(Excel.Worksheet sheet, int rowIndex)
{
Range r = (Range)sheet.Rows[rowIndex, missing];
r.Delete(Excel.XlDeleteShiftDirection.xlShiftUp);
}
///
/// 退出Excel,并且释放调用的COM资源
///
private void Dispose()
{
book.Close(missing, missing, missing);
app.Workbooks.Close();
app.Quit();
if(range != null)
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(range);
range = null;
}
if(sheet != null)
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(sheet);
sheet = null;
}
if(book != null)
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(book);
book = null;
}
if(app != null)
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(app);
app = null;
}
GC.Collect();
this.KillExcelProcess();
}
///
/// 结束Excel进程
///
private void KillExcelProcess()
{
DateTime startTime;
Process[] processes = Process.GetProcessesByName("Excel");
//得不到Excel进程ID,暂时只能判断进程启动时间
foreach (Process process in processes)
{
startTime = process.StartTime;
if(startTime > beforeTime && startTime < afterTime)
process.Kill();
}
}
}
}
--------------------编程问答-------------------- 如果你使用office庫,注意使用的版本就好,不然,,呵呵 --------------------编程问答--------------------
因为我是用WPF做的程序,不知道后台读取并筛选Excel的数据后显示到窗体的难度大不大? --------------------编程问答--------------------
这样就可以了 --------------------编程问答-------------------- --------------------编程问答--------------------
我想在Excel查找定位到关键字,并复制跟他同行的某几个数据(不是整行)。我试过OleDB、ExcelLibrary,但是网上关于它们的查找这一功能的资料很少,讲的比较多的还是怎么读取全部数据或者将数据导出到Excel里面。而且我的是数据源很大,一个簿里面有很多表,并都有做了筛选的,我用Library读的时候就报错大概说“不能打开特殊表”,换个小一点的表却没事.
--------------------编程问答--------------------
前两天刚好用到这个,读Excel文件到DataTable。
参考:
http://www.dotneter.com/tag/read-excel-file-in-c --------------------编程问答-------------------- --------------------编程问答-------------------- C#窗体程序,谁能帮忙一下给一个com组件操作读写Excel文件,显示在gridview控件中的demo
补充:.NET技术 , C#