C#实现EXCEL表格转DataTable
C#代码实现把Excel文件转化为DataTable，根据Excel的文件后缀名不同，用不同的方法来进行实现，下面通过根据Excel文件的两种后缀名（*.xlsx和*.xls）分别来实现。获取文件后缀名的方法是：Path.GetExtension(fileName)方法，通过引用：using System.IO;实现代码如下：（其中以下代码中出现的filename都是带盘符的绝对路径）
根据Excel文件的后缀名不同调用的主方法
private DataTable FileToDataTable(string fileName)
{
DataTable dt = new DataTable();
string extendName = Path.GetExtension(fileName);//获取文件的后缀名
switch (extendName.ToLower())
{
case ".xls":
dt = XlsToDataTable(fileName);
break;
case ".xlsx":
dt = XlsxToDataTable(fileName);
break;
default:
break;
}
return dt;
}
XlsToDataTable()
private DataTable XlsToDataTable(string fileName)
{
DataTable dataTable = new DataTable();
Stream stream = null;
try
{
stream = File.OpenRead(fileName);
HSSFWorkbook hssfworkbook = new HSSFWorkbook(stream);
HSSFSheet hssfsheet = (HSSFSheet)hssfworkbook.GetSheetAt(hssfworkbook.ActiveSheetIndex);
HSSFRow hssfrow = (HSSFRow)hssfsheet.GetRow(0);
int lastCellNum = (int)hssfrow.LastCellNum;
for (int i = (int)hssfrow.FirstCellNum; i < lastCellNum; i++)
{
DataColumn column = new DataColumn(hssfrow.GetCell(i).StringCellValue);
dataTable.Columns.Add(column);
}
dataTable.TableName = hssfsheet.SheetName;
int lastRowNum = hssfsheet.LastRowNum;
//列名后,从TABLE第二行开始进行填充数据
for (int i = hssfsheet.FirstRowNum + 1; i < hssfsheet.LastRowNum; i++)//
{
HSSFRow hssfrow2 = (HSSFRow)hssfsheet.GetRow(i);
DataRow dataRow = dataTable.NewRow();
for (int j = (int)hssfrow2.FirstCellNum; j < lastCellNum; j++)//
{
dataRow[j] = hssfrow2.GetCell(j);//
}
dataTable.Rows.Add(dataRow);
}
stream.Close();
}
catch (Exception ex)
{
ScriptManager.RegisterStartupScript(Page, GetType(), "alertForm", "alert(' Xls to DataTable: " + ex.Message + "');", true);
}
finally
{
if (stream != null)
{
stream.Close();
}
}
return dataTable;
}
XlsxToDataTable()
public DataTable XlsxToDataTable(string vFilePath)
{
DataTable dataTable = new DataTable();
try
{
SLDocument sldocument = new SLDocument(vFilePath);
dataTable.TableName = sldocument.GetSheetNames()[0];
SLWorksheetStatistics worksheetStatistics = sldocument.GetWorksheetStatistics();
int startColumnIndex = worksheetStatistics.StartColumnIndex;
int endColumnIndex = worksheetStatistics.EndColumnIndex;
int startRowIndex = worksheetStatistics.StartRowIndex;
int endRowIndex = worksheetStatistics.EndRowIndex;
for (int i = startColumnIndex; i <= endColumnIndex; i++)
{
SLRstType cellValueAsRstType = sldocument.GetCellValueAsRstType(1, i);
dataTable.Columns.Add(new DataColumn(cellValueAsRstType.GetText(), typeof(string)));
}
for (int j = startRowIndex + 1; j <= endRowIndex; j++)
{
DataRow dataRow = dataTable.NewRow();
for (int i = startColumnIndex; i <= endColumnIndex; i++)
{
dataRow[i - 1] = sldocument.GetCellValueAsString(j, i);
}
dataTable.Rows.Add(dataRow);
}
}
catch (Exception ex)
{
throw new Exception("Xlsx to DataTable: \n" + ex.Message);
}
return dataTable;
}
