/// <summary>
/// 利用模板，DataTable导出到Excel（单个类别）
/// </summary>
/// <param name="dtSource">DataTable</param>
/// <param name="strTemplateFileName">模板的文件路径、名称</param>
/// <param name="flg">文件标识--sheet名（1：个人所得税/2：）</param>
/// <param name="titleName">表头名称</param>
/// <returns></returns>
private static MemoryStream ExportExcelForDtByNPOI(DataTable dtSource, string strTemplateFileName, FileEmun.TemplateEmun type, string titleName)
{
#region 处理DataTable,处理明细表中没有而需要额外读取汇总值的两列
#endregion
int totalIndex = 20; // 每个类别的总行数
int rowIndex = 2; // 起始行
int dtRowIndex = dtSource.Rows.Count; // DataTable的数据行数
FileStream file = new FileStream(strTemplateFileName, FileMode.Open, FileAccess.Read); //读入excel模板
HSSFWorkbook workbook = new HSSFWorkbook(file);
string sheetName = "";
switch (type)
{
case FileEmun.TemplateEmun.Template_Income:
sheetName = "IncomeReport";
break;
case FileEmun.TemplateEmun.Template_AllBasicPositionSalary:
sheetName = "AllBasicSalaryStandardReport";
break;
case FileEmun.TemplateEmun.Template_AreaBasicPositionSalary:
sheetName = "AreaBasicPositionSalaryReport";
break;
case FileEmun.TemplateEmun.Template_ShopBasicPositionSalary:
sheetName = "ShopBasicPositionSalary";
break;
case FileEmun.TemplateEmun.Template_ExceptionalStaff:
sheetName = "ExceptionalStaff";
break;
case FileEmun.TemplateEmun.Template_UserWage:
sheetName = "UserWage";
break;
}
Sheet sheet = workbook.GetSheet(sheetName);
#region 右击文件 属性信息
{
DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();
dsi.Company = "易美娜公司";
workbook.DocumentSummaryInformation = dsi;
SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
si.Author = "于 明"; //填加xls文件作者信息
si.ApplicationName = "导出EXCEL数据"; //填加xls文件创建程序信息
si.LastAuthor = "于 明"; //填加xls文件最后保存者信息
si.Comments = "于 明"; //填加xls文件作者信息
si.Title = "EXCEL报表数据"; //填加xls文件标题信息
si.Subject = "EXCEL报表数据"; //填加文件主题信息
si.CreateDateTime = DateTime.Now;
workbook.SummaryInformation = si;
}
#endregion
#region 表头
Row headerRow = sheet.GetRow(0);
Cell headerCell = headerRow.GetCell(0);
headerCell.SetCellValue(titleName);
#endregion
// 隐藏多余行
for (int i = rowIndex + dtRowIndex; i < rowIndex + totalIndex; i++)
{
Row dataRowD = sheet.GetRow(i);
dataRowD.Height = 0;
dataRowD.ZeroHeight = true;
//sheet.RemoveRow(dataRowD);
}
foreach (DataRow row in dtSource.Rows)
{
#region 填充内容
Row dataRow = sheet.GetRow(rowIndex);
int columnIndex = 0; // 开始列（0为标题列，从1开始）
foreach (DataColumn column in dtSource.Columns)
{
// 列序号赋值
if (columnIndex > dtSource.Columns.Count)
{
break;
}
Cell newCell = dataRow.GetCell(columnIndex);
if (newCell == null)
{
newCell = dataRow.CreateCell(columnIndex);
}
string drValue = row[column].ToString();
switch (column.DataType.ToString())
{
case "System.String": //字符串类型
newCell.SetCellValue(drValue);
break;
case "System.DateTime": //日期类型
DateTime dateV;
DateTime.TryParse(drValue, out dateV);
newCell.SetCellValue(dateV);
break;
case "System.Boolean": //布尔型
bool boolV = false;
bool.TryParse(drValue, out boolV);
newCell.SetCellValue(boolV);
break;
case "System.Int16": //整型
case "System.Int32":
case "System.Int64":
case "System.Byte":
int intV = 0;
int.TryParse(drValue, out intV);
newCell.SetCellValue(intV);
break;
case "System.Decimal": //浮点型
case "System.Double":
double doubV = 0;
double.TryParse(drValue, out doubV);
newCell.SetCellValue(doubV);
break;
case "System.DBNull": //空值处理
newCell.SetCellValue("");
break;
default:
newCell.SetCellValue("");
break;
}
columnIndex++;
}
#endregion
rowIndex++;
}
//格式化当前sheet，用于数据total计算
sheet.ForceFormulaRecalculation = true;
#region Clear "0"
System.Collections.IEnumerator rows = sheet.GetRowEnumerator();
int cellCount = headerRow.LastCellNum;
for (int i = (sheet.FirstRowNum + 1); i <= sheet.LastRowNum; i++)
{
Row row = sheet.GetRow(i);
if (row != null)
{
for (int j = row.FirstCellNum; j < cellCount; j++)
{
Cell c = row.GetCell(j);
if (c != null)
{
switch (c.CellType)
{
case CellType.NUMERIC:
if (c.NumericCellValue == 0)
{
c.SetCellType(CellType.STRING);
c.SetCellValue(string.Empty);
}
break;
case CellType.BLANK:
case CellType.STRING:
if (c.StringCellValue == "0")
{
c.SetCellValue(string.Empty);
}
break;
}
}
}
}
}
#endregion
using (MemoryStream ms = new MemoryStream())
{
workbook.Write(ms);
ms.Flush();
ms.Position = 0;
sheet = null;
workbook = null;
//sheet.Dispose();
//workbook.Dispose();//一般只用写这一个就OK了，他会遍历并释放所有资源，但当前版本有问题所以只释放sheet
return(ms);
}
}
/// <summary>
/// 利用模板，DataTable导出到Excel（单个类别）
/// </summary>
/// <param name="dtSource">DataTable</param>
/// <param name="strFileName">生成的文件路径、名称</param>
/// <param name="strTemplateFileName">模板的文件路径、名称</param>
/// <param name="flg">文件标识（1：个人所得税/2：）</param>
/// <param name="titleName">表头名称</param>
public static void ExportExcelForDtByNPOI(DataTable dtSource, string strFileName, string strTemplateFileName, FileEmun.TemplateEmun type, string titleName)
{
// 利用模板，DataTable导出到Excel（单个类别）
using (MemoryStream ms = ExportExcelForDtByNPOI(dtSource, strTemplateFileName, type, titleName))
{
byte[] data = ms.ToArray();
#region 客户端保存
HttpResponse response = System.Web.HttpContext.Current.Response;
response.Clear();
//Encoding pageEncode = Encoding.GetEncoding(PageEncode);
response.ContentEncoding = Encoding.UTF8;
response.Charset = "gb2312";
response.ContentType = "application/vnd.ms-excel";//"application/vnd.ms-excel application/vnd-excel";
response.AppendHeader("Content-Disposition",
"attachment;filename=" + HttpUtility.UrlEncode(strFileName, Encoding.UTF8));
System.Web.HttpContext.Current.Response.BinaryWrite(data);
#endregion
}
}
