读excle

时间:2023-03-09 14:30:34
读excle

1.OleDbConnection读取Excel

///<summary>
///上传文件到临时目录中
///</ummary>
private void Upload()
{
HttpPostedFile file = this.fileSelect.PostedFile;
string fileName = file.FileName;
string tempPath = System.IO.Path.GetTempPath(); //获取系统临时文件路径
fileName = System.IO.Path.GetFileName(fileName); //获取文件名(不带路径)
this.currFileExtension = System.IO.Path.GetExtension(fileName); //获取文件的扩展名
this.currFilePath = tempPath + fileName; //获取上传后的文件路径 记录到前面声明的全局变量
file.SaveAs(this.currFilePath); //上传
}

///<summary>
///读取xls\xlsx格式的Excel文件的方法
///</ummary>
///<param name="path">待读取Excel的全路径</param>
///<returns></returns>
private DataTable ReadExcelToTable(string path)
{
//连接字符串
string connstring = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties='Excel 8.0;HDR=NO;IMEX=1';"; // Office 07及以上版本 不能出现多余的空格 而且分号注意
//string connstring = Provider=Microsoft.JET.OLEDB.4.0;Data Source=" + path + ";Extended Properties='Excel 8.0;HDR=NO;IMEX=1';"; //Office 07以下版本 因为本人用Office2010 所以没有用到这个连接字符串 可根据自己的情况选择 或者程序判断要用哪一个连接字符串
using(OleDbConnection conn = new OleDbConnection(connstring))
{
conn.Open();
DataTable sheetsName = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables,new object[]{null,null,null,"Table"}); //得到所有sheet的名字
string firstSheetName = sheetsName.Rows[0][2].ToString(); //得到第一个sheet的名字
string sql = string.Format("SELECT * FROM [{0}],firstSheetName); //查询字符串
OleDbDataAdapter ada =new OleDbDataAdapter(sql,connstring);
DataSet set = new DataSet();
ada.Fill(set);
return set.Tables[0];

}
}

///<summary>
///读取csv格式的Excel文件的方法
///</ummary>
///<param name="path">待读取Excel的全路径</param>
///<returns></returns>
private DataTable ReadExcelWithStream(string path)
{
DataTable dt = new DataTable();
bool isDtHasColumn = false; //标记DataTable 是否已经生成了列
StreamReader reader = new StreamReader(path,System.Text.Encoding.Default); //数据流
while(!reader.EndOfStream)
{
string meaage = reader.ReadLine();
string[] splitResult = message.Split(new char[]{','},StringSplitOption.None); //读取一行 以逗号分隔 存入数组
DataRow row = dt.NewRow();
for(int i = 0;i<splitResult.Length;i++)
{
if(!isDtHasColumn) //如果还没有生成列
{
dt.Columns.Add("column" + i,typeof(string));
}
row[i] = splitResult[i];
}
dt.Rows.Add(row); //添加行
isDtHasColumn = true; //读取第一行后 就标记已经存在列 再读取以后的行时,就不再生成列
}
return dt;
}

2.ExcelDataReader可以读取 Microsoft Excel 文件

ExcelDataReader可以读取 Microsoft Excel 文件 ('97-2007),支持Windows .Net Framework 2 +、 Windows Mobile with Compact Framework
、 Linux, OS X, BSD with Mono 2。项目地址:http://exceldatareader.codeplex.com/(下载插件)

使用方法非常简单:

FileStream stream = File.Open(filePath, FileMode.Open, FileAccess.Read);

//1. Reading from a binary Excel file ('97-2003 format; *.xls)

IExcelDataReader excelReader = ExcelReaderFactory.CreateBinaryReader(stream);

//...

//2. Reading from a OpenXml Excel file (2007 format; *.xlsx)

IExcelDataReader excelReader = ExcelReaderFactory.CreateOpenXmlReader(stream);

//...

//3. DataSet - The result of each spreadsheet will be created in the result.Tables

DataSet result = excelReader.AsDataSet();

//...

//4. DataSet - Create column names from first row

excelReader.IsFirstRowAsColumnNames = true;

DataSet result = excelReader.AsDataSet();

//5. Data Reader methods

while (excelReader.Read())

{

//excelReader.GetInt32(0);

}

//6. Free resources (IExcelDataReader is IDisposable)

excelReader.Close();