我已经使用HttpContext从数据库导出数据,格式为table,tr和td.我想读同一个文件并转换成datatable.
<add name="Excel03ConString" connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties='HTML Import;HDR={1};IMEX=1'" />
<add name="Excel03ConString" connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties='Excel 8.0;HDR={1};IMEX=1'" />
private DataTable GetTableFromExcel()
{
DataTable dt = new DataTable();
try
{
if (exclFileUpload.HasFile)
{
string FileName = Path.GetFileName(exclFileUpload.PostedFile.FileName);
string Extension = Path.GetExtension(exclFileUpload.PostedFile.FileName);
string FolderPath = Server.MapPath(ConfigurationManager.AppSettings["FolderPath"]);
//string NewFileName = string.Format("{0}_{1}",DateTime.Now.ToString().Replace("/","").Replace(" ","").Replace(":",""),FileName);
string FilePath = Path.Combine(string.Format("{0}/{1}",FolderPath,FileName));
exclFileUpload.SaveAs(FilePath);
string conStr = "";
switch (Extension)
{
case ".xls": //Excel 97-03
conStr = ConfigurationManager.ConnectionStrings["Excel03ConString"].ConnectionString;
break;
case ".xlsx": //Excel 07
conStr = ConfigurationManager.ConnectionStrings["Excel07ConString"].ConnectionString;
break;
}
conStr = String.Format(conStr,FilePath,true);
OleDbConnection connExcel = new OleDbConnection(conStr);
OleDbCommand cmdExcel = new OleDbCommand();
OleDbDataAdapter oda = new OleDbDataAdapter();
cmdExcel.Connection = connExcel;
connExcel.Open();
DataTable dtExcelSchema;
dtExcelSchema = connExcel.GetOleDbSchemaTable(OleDbSchemaGuid.Tables,null);
string SheetName = dtExcelSchema.Rows[0]["TABLE_NAME"].ToString();
connExcel.Close();
connExcel.Open();
cmdExcel.CommandText = "SELECT * From [" + SheetName + "]";
oda.SelectCommand = cmdExcel;
oda.Fill(dt);
connExcel.Close();
File.Delete(FilePath);
}
}
catch (Exception ex)
{
}
return dt;
}
当使用第二个连接字符串时,我收到错误“外部表不是预期格式的connection.Open()”.但是当使用第一个时,我在阅读工作表名称时会收到错误.
请告诉我如何从Excel中读取表格或直接从Excel中读取数据.
解决方法
我认为这个
Third party dll-(ExcellDataReader)可能有助于解决你的问题.
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();
