2023年10月15日 在ASP.NET CORE中测试通过
public ActionResult Index()
{
DataTable table = new DataTable();
table.Columns.Add("科室名称");
table.Columns.Add("备注");
for (int i = 0; i < 2; i++)
{
System.Data.DataRow dr = table.NewRow();
dr["科室名称"] = "名称"+i;
dr["备注"] = "备注"+i;
table.Rows.Add(dr);
}
System.IO.MemoryStream ms = Util.DataTableRenderToExcel.RenderDataTableToExcel(table) as System.IO.MemoryStream;
string filePath = "科室列表.xls";
new FileExtensionContentTypeProvider().TryGetContentType(filePath, out string contentType);
return File(ms.ToArray(), contentType, filePath) ;
}
using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.IO;
using NPOI.HSSF.UserModel;
namespace JCT.Util
{
public static class DataTableRenderToExcel
{
public static Stream RenderDataTableToExcel(DataTable SourceTable)
{
HSSFWorkbook workbook = new HSSFWorkbook();
MemoryStream ms = new MemoryStream();
HSSFSheet sheet = (HSSFSheet)workbook.CreateSheet();
HSSFRow headerRow = (HSSFRow)sheet.CreateRow(0);
// handling header.
foreach (DataColumn column in SourceTable.Columns)
headerRow.CreateCell(column.Ordinal).SetCellValue(column.ColumnName);
// handling value.
int rowIndex = 1;
foreach (DataRow row in SourceTable.Rows)
{
HSSFRow dataRow = (HSSFRow)sheet.CreateRow(rowIndex);
foreach (DataColumn column in SourceTable.Columns)
{
dataRow.CreateCell(column.Ordinal).SetCellValue(row[column].ToString());
}
rowIndex++;
}
workbook.Write(ms);
ms.Flush();
ms.Position = 0;
sheet = null;
headerRow = null;
workbook = null;
return ms;
}
public static void RenderDataTableToExcel(DataTable SourceTable, string FileName)
{
MemoryStream ms = RenderDataTableToExcel(SourceTable) as MemoryStream;
FileStream fs = new FileStream(FileName, FileMode.Create, FileAccess.Write);
byte[] data = ms.ToArray();
fs.Write(data, 0, data.Length);
fs.Flush();
fs.Close();
data = null;
ms = null;
fs = null;
}
public static DataTable RenderDataTableFromExcel(Stream ExcelFileStream, string SheetName, int HeaderRowIndex)
{
HSSFWorkbook workbook = new HSSFWorkbook(ExcelFileStream);
HSSFSheet sheet = (HSSFSheet)workbook.GetSheet(SheetName);
DataTable table = new DataTable();
HSSFRow headerRow = (HSSFRow)sheet.GetRow(HeaderRowIndex);
int cellCount = headerRow.LastCellNum;
for (int i = headerRow.FirstCellNum; i < cellCount; i++)
{
DataColumn column = new DataColumn(headerRow.GetCell(i).StringCellValue);
table.Columns.Add(column);
}
int rowCount = sheet.LastRowNum;
for (int i = (sheet.FirstRowNum + 1); i < sheet.LastRowNum; i++)
{
HSSFRow row = (HSSFRow)sheet.GetRow(i);
DataRow dataRow = table.NewRow();
for (int j = row.FirstCellNum; j < cellCount; j++)
dataRow[j] = row.GetCell(j).ToString();
}
ExcelFileStream.Close();
workbook = null;
sheet = null;
return table;
}
public static DataTable RenderDataTableFromExcel(Stream ExcelFileStream, int SheetIndex, int HeaderRowIndex)
{
HSSFWorkbook workbook = new HSSFWorkbook(ExcelFileStream);
HSSFSheet sheet = (HSSFSheet)workbook.GetSheetAt(SheetIndex);
DataTable table = new DataTable();
HSSFRow headerRow = (HSSFRow)sheet.GetRow(HeaderRowIndex);
int cellCount = headerRow.LastCellNum;
for (int i = headerRow.FirstCellNum; i < cellCount; i++)
{
DataColumn column = new DataColumn(headerRow.GetCell(i).StringCellValue);
table.Columns.Add(column);
}
int rowCount = sheet.LastRowNum;
for (int i = (sheet.FirstRowNum + 1); i < sheet.LastRowNum; i++)
{
HSSFRow row = (HSSFRow)sheet.GetRow(i);
DataRow dataRow = table.NewRow();
for (int j = row.FirstCellNum; j < cellCount; j++)
{
if (row.GetCell(j) != null)
dataRow[j] = row.GetCell(j).ToString();
}
table.Rows.Add(dataRow);
}
ExcelFileStream.Close();
workbook = null;
sheet = null;
return table;
}
/// <summary>读取excel
/// 默认第一行为标头
/// </summary>
/// <param name="path">excel文档路径</param>
/// <returns></returns>
public static DataTable RenderDataTableFromExcel(string path)
{
DataTable dt = new DataTable();
HSSFWorkbook hssfworkbook;
using (FileStream file = new FileStream(path, FileMode.Open, FileAccess.Read))
{
hssfworkbook = new HSSFWorkbook(file);
}
HSSFSheet sheet = (HSSFSheet)hssfworkbook.GetSheetAt(0);
System.Collections.IEnumerator rows = sheet.GetRowEnumerator();
HSSFRow headerRow = (HSSFRow)sheet.GetRow(0);
int cellCount = headerRow.LastCellNum;
for (int j = 0; j < cellCount; j++)
{
HSSFCell cell = (HSSFCell)headerRow.GetCell(j);
if (cell == null)
{
dt.Columns.Add("");
}
else
{
dt.Columns.Add(cell.ToString());
}
}
for (int i = (sheet.FirstRowNum + 1); i <= sheet.LastRowNum; i++)
{
HSSFRow row = (HSSFRow)sheet.GetRow(i);
if (row == null)
{
continue;
}
DataRow dataRow = dt.NewRow();
for (int j = row.FirstCellNum; j < cellCount; j++)
{
if (row.GetCell(j) != null)
dataRow[j] = row.GetCell(j).ToString();
}
dt.Rows.Add(dataRow);
}
return dt;
}
/// <summary>读取excel
/// 默认第一行为标头
/// </summary>
/// <param name="path">excel文档路径</param>
/// <param name="sheetnum">第几个sheet，从0开始</param>
/// <returns></returns>
public static DataTable RenderDataTableFromExcel(string path, int sheetnum)
{
DataTable dt = new DataTable();
HSSFWorkbook hssfworkbook;
using (FileStream file = new FileStream(path, FileMode.Open, FileAccess.Read))
{
hssfworkbook = new HSSFWorkbook(file);
}
HSSFSheet sheet = (HSSFSheet)hssfworkbook.GetSheetAt(sheetnum);
System.Collections.IEnumerator rows = sheet.GetRowEnumerator();
HSSFRow headerRow = (HSSFRow)sheet.GetRow(0);
int cellCount = headerRow.LastCellNum;
for (int j = 0; j < cellCount; j++)
{
HSSFCell cell = (HSSFCell)headerRow.GetCell(j);
if (cell==null)
{
dt.Columns.Add("");
}
else {
dt.Columns.Add(cell.ToString());
}
}
for (int i = (sheet.FirstRowNum + 1); i <= sheet.LastRowNum; i++)
{
HSSFRow row = (HSSFRow)sheet.GetRow(i);
if (row == null)
{
continue;
}
DataRow dataRow = dt.NewRow();
for (int j = row.FirstCellNum; j < cellCount; j++)
{
if (row.GetCell(j) != null)
dataRow[j] = row.GetCell(j).ToString();
}
dt.Rows.Add(dataRow);
}
return dt;
}
/// <summary>读取excel
/// 默认第一行为标头
/// </summary>
/// <param name="path">excel文档路径</param>
/// <param name="sheetname">sheet名称</param>
/// <returns></returns>
public static DataTable RenderDataTableFromExcel(string path, string sheetname)
{
DataTable dt = new DataTable();
HSSFWorkbook hssfworkbook;
using (FileStream file = new FileStream(path, FileMode.Open, FileAccess.Read))
{
hssfworkbook = new HSSFWorkbook(file);
}
HSSFSheet sheet = (HSSFSheet)hssfworkbook.GetSheet(sheetname);
System.Collections.IEnumerator rows = sheet.GetRowEnumerator();
HSSFRow headerRow = (HSSFRow)sheet.GetRow(0);
int cellCount = headerRow.LastCellNum;
for (int j = 0; j < cellCount; j++)
{
HSSFCell cell = (HSSFCell)headerRow.GetCell(j);
if (cell == null)
{
dt.Columns.Add("");
}
else
{
dt.Columns.Add(cell.ToString());
}
}
for (int i = (sheet.FirstRowNum + 1); i <= sheet.LastRowNum; i++)
{
HSSFRow row = (HSSFRow)sheet.GetRow(i);
if (row == null)
{
continue;
}
DataRow dataRow = dt.NewRow();
for (int j = row.FirstCellNum; j < cellCount; j++)
{
if (row.GetCell(j) != null)
dataRow[j] = row.GetCell(j).ToString();
}
dt.Rows.Add(dataRow);
}
return dt;
}
/// <summary>获取excel中sheet的集合
///
/// </summary>
/// <param name="filepath"></param>
/// <returns></returns>
internal static List<string> GetExcelSheet(string filepath)
{
HSSFWorkbook hssfworkbook;
using (FileStream file = new FileStream(filepath, FileMode.Open, FileAccess.Read))
{
hssfworkbook = new HSSFWorkbook(file);
}
List<string> list = new List<string>();
for (int i = 0; i < hssfworkbook.NumberOfSheets; i++)
{
list.Add(hssfworkbook.GetSheetName(i));
}
return list;
}
}
}
使用示例代码：（导出xls）ASP.NET ASPX
DataSet ds = dal.GetList("*", "createdate", "desc", anp.PageSize, anp.CurrentPageIndex, GetCond());
DataTable table = ds.Tables0;
// 填充資料（由讀者自行撰寫）
// 產生 Excel 資料流。
MemoryStream ms = DataTableRenderToExcel.RenderDataTableToExcel(table) as MemoryStream;
//判断是否是IE，是则编码文件名，防止中文乱码
HttpBrowserCapabilities bc = Request.Browser;
string browser = bc.Browser.ToString();
string filename = browser.ToLower().Contains("ie") ? HttpUtility.UrlEncode(System.Text.UTF8Encoding.UTF8.GetBytes("学员信息表")) : "学员信息表";
// 設定強制下載標頭。
Response.AddHeader("Content-Disposition", string.Format("attachment; filename=" + filename + ".xls"));
// 輸出檔案。
Response.BinaryWrite(ms.ToArray());
ms.Close();
ms.Dispose();