NPOI元件實現EXCEL大資料的讀取和寫入
阿新 • • 發佈：2019-01-09
public bool DataToExcel(DataTable
SourceDataTable )
{
if (SourceDataTable == null) return false;
if (SourceDataTable.Rows.Count == 0) return false;
MemoryStream ms = new MemoryStream();
try
{
using (SourceDataTable)
{
String hz = Path.GetExtension(ExcelName);
IWorkbook workbook;
if (hz.Equals(".xls")) //針對2003版本
workbook = new HSSFWorkbook();
else
workbook = new XSSFWorkbook();
NPOI.SS.UserModel.IFont font = workbook.CreateFont();
font.FontHeightInPoints = 12;
font.FontName = "宋體";
ICellStyle cellStyle = workbook.CreateCellStyle();
cellStyle.SetFont(font);
ISheet sheet = workbook.CreateSheet();
IRow headerRow = sheet.CreateRow(0);
// handling header.
foreach (DataColumn column in SourceDataTable.Columns)
{
sheet.SetColumnWidth(column.Ordinal, 10 * 256);
sheet.SetDefaultColumnStyle(column.Ordinal, cellStyle);
headerRow.CreateCell(column.Ordinal).SetCellValue(column.Caption);
}
// handling value.
int rowIndex = 0;
foreach (DataRow row in SourceDataTable.Rows)
{
IRow dataRow = sheet.CreateRow(rowIndex);
dataRow.RowStyle = cellStyle;
foreach (DataColumn column in SourceDataTable.Columns)
{
dataRow.CreateCell(column.Ordinal).SetCellValue(row[column].ToString());
}
rowIndex++;
}
workbook.Write(ms);
ms.Flush();
ms.Position = 0;
}
File.Delete(ExcelName);
using (FileStream fs = new FileStream(ExcelName, FileMode.Create, FileAccess.Write))
{
byte[] data = ms.ToArray();
fs.Write(data, 0, data.Length);
fs.Flush();
}
return true;
}
catch (Exception e)
{
MessageBox.Show(e.ToString());
return false;
}
}
{
if (SourceDataTable == null) return false;
if (SourceDataTable.Rows.Count == 0) return false;
MemoryStream ms = new MemoryStream();
try
{
using (SourceDataTable)
{
String hz = Path.GetExtension(ExcelName);
IWorkbook workbook;
if (hz.Equals(".xls")) //針對2003版本
workbook = new HSSFWorkbook();
else
workbook = new XSSFWorkbook();
NPOI.SS.UserModel.IFont font = workbook.CreateFont();
font.FontHeightInPoints = 12;
font.FontName = "宋體";
ICellStyle cellStyle = workbook.CreateCellStyle();
cellStyle.SetFont(font);
ISheet sheet = workbook.CreateSheet();
IRow headerRow = sheet.CreateRow(0);
// handling header.
foreach (DataColumn column in SourceDataTable.Columns)
{
sheet.SetColumnWidth(column.Ordinal, 10 * 256);
sheet.SetDefaultColumnStyle(column.Ordinal, cellStyle);
headerRow.CreateCell(column.Ordinal).SetCellValue(column.Caption);
}
// handling value.
int rowIndex = 0;
foreach (DataRow row in SourceDataTable.Rows)
{
IRow dataRow = sheet.CreateRow(rowIndex);
dataRow.RowStyle = cellStyle;
foreach (DataColumn column in SourceDataTable.Columns)
{
dataRow.CreateCell(column.Ordinal).SetCellValue(row[column].ToString());
}
rowIndex++;
}
workbook.Write(ms);
ms.Flush();
ms.Position = 0;
}
File.Delete(ExcelName);
using (FileStream fs = new FileStream(ExcelName, FileMode.Create, FileAccess.Write))
{
byte[] data = ms.ToArray();
fs.Write(data, 0, data.Length);
fs.Flush();
}
return true;
}
catch (Exception e)
{
MessageBox.Show(e.ToString());
return false;
}
}