public class DataTableRenderToExcel
{
public static Stream RenderDataTableToExcel(DataTable SourceTable)
{
HSSFWorkbook workbook = new HSSFWorkbook();
MemoryStream ms = new MemoryStream();
HSSFSheet sheet = workbook.CreateSheet();
HSSFRow headerRow = 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 = 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;
}
/// <summary>
///
/// </summary>
/// <param name="SourceTable">数据源</param>
/// <param name="ht">key-字段名称;value-excel标题</param>
/// <returns></returns>
public static Stream RenderDataTableToExcel(DataTable SourceTable, Dictionary<String, String> ht)
{
HSSFWorkbook workbook = new HSSFWorkbook();
MemoryStream ms = new MemoryStream();
HSSFSheet sheet = workbook.CreateSheet();
HSSFRow headerRow = sheet.CreateRow(0);
// handling header.
int index = 0;
foreach (string item in ht.Values)
{
headerRow.CreateCell(index).SetCellValue(item);
index++;
}
// handling value.
int rowIndex = 1;
foreach (DataRow row in SourceTable.Rows)
{
HSSFRow dataRow = sheet.CreateRow(rowIndex);
index = 0;
foreach (string item in ht.Keys)
{
dataRow.CreateCell(index).SetCellValue(row[item].ToString());
index++;
}
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,string FilePath)
{
if (!Directory.Exists(FilePath))
Directory.CreateDirectory(FilePath);
MemoryStream ms = RenderDataTableToExcel(SourceTable) as MemoryStream;
FileStream fs = new FileStream(FilePath+"\\"+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;
}
/// <summary>
/// 下载文件
/// </summary>
/// <param name="fs"></param>
/// <param name="FileName"></param>
public static void RenderDataTableToExcel(Stream fs, string FileName)
{
HttpContext curContext = HttpContext.Current;
byte[] bytes = new byte[(int)fs.Length];
fs.Read(bytes, 0, bytes.Length);
fs.Close();
curContext.Response.ContentType = "application/octet-stream";
//通知浏览器下载文件而不是打开
curContext.Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8));
curContext.Response.BinaryWrite(bytes);
curContext.Response.Flush();
curContext.Response.End();
}
public static DataTable RenderDataTableFromExcel(Stream ExcelFileStream, string SheetName, int HeaderRowIndex)
{
HSSFWorkbook workbook = new HSSFWorkbook(ExcelFileStream);
HSSFSheet sheet = workbook.GetSheet(SheetName);
DataTable table = new DataTable();
HSSFRow headerRow = 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 = 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 = workbook.GetSheetAt(SheetIndex);
DataTable table = new DataTable();
HSSFRow headerRow = 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 = 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 = hssfworkbook.GetSheetAt(0);
System.Collections.IEnumerator rows = sheet.GetRowEnumerator();
HSSFRow headerRow = sheet.GetRow(0);
int cellCount = headerRow.LastCellNum;
for (int j = 0; j < cellCount; j++)
{
HSSFCell cell = headerRow.GetCell(j);
dt.Columns.Add(cell.ToString());
}
for (int i = (sheet.FirstRowNum + 1); i <= sheet.LastRowNum; i++)
{
HSSFRow row = sheet.GetRow(i);
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);
}
//while (rows.MoveNext())
//{
// HSSFRow row = (HSSFRow)rows.Current;
// DataRow dr = dt.NewRow();
// for (int i = 0; i < row.LastCellNum; i++)
// {
// HSSFCell cell = row.GetCell(i);
// if (cell == null)
// {
// dr[i] = null;
// }
// else
// {
// dr[i] = cell.ToString();
// }
// }
// dt.Rows.Add(dr);
//}
return dt;
}
}
