/// <summary>
/// 从excel导入数据到数组
/// </summary>
public List <T> Import <T>(Stream ExcelFileStream, int SheetIndex, int HeaderRowIndex, List <ExcelHeader> list)
{
HSSFWorkbook workbook = new HSSFWorkbook(ExcelFileStream);
HSSFSheet sheet = workbook.GetSheetAt(SheetIndex);
List <T> resultList = new List <T>();
HSSFRow headerRow = sheet.GetRow(HeaderRowIndex);
int cellCount = headerRow.LastCellNum;
Dictionary <int, string> dict = new Dictionary <int, string>();
for (int i = headerRow.FirstCellNum; i < cellCount; i++)
{
dict.Add(i, headerRow.GetCell(i).StringCellValue);
}
int rowCount = sheet.LastRowNum;
for (int i = (sheet.FirstRowNum + 1); i <= sheet.LastRowNum; i++)
{
HSSFRow row = sheet.GetRow(i);
Dictionary <string, object> valueMap = new Dictionary <string, object>();
for (int j = row.FirstCellNum; j < cellCount; j++)
{
ExcelHeader header = list.Find(f => f.HeaderText == dict[j]);
string value = row.GetCell(j) == null ? "" : row.GetCell(j).ToString();
if (header != null)
{
valueMap.Add(header.PropertyName, value);
}
}
resultList.Add(this.Create <T>(list, valueMap));
}
ExcelFileStream.Close();
workbook = null;
sheet = null;
return(resultList);
}
/// <summary>
/// 返回列头
/// </summary>
/// <param name="template"></param>
/// <returns></returns>
public List <ExcelHeader> GetHeaderList(string template)
{
XmlTextReader reader = new XmlTextReader(template);
XmlDocument doc = new XmlDocument();
doc.Load(reader);
List <ExcelHeader> headerList = new List <ExcelHeader>();
foreach (XmlNode node in doc.DocumentElement.ChildNodes)
{
ExcelHeader header = new ExcelHeader();
if (node.Attributes["HeaderText"] != null)
{
header.HeaderText = node.Attributes["HeaderText"].Value;
}
if (node.Attributes["PropertyName"] != null)
{
header.PropertyName = node.Attributes["PropertyName"].Value;
}
if (node.Attributes["DataType"] != null)
{
header.DataType = node.Attributes["DataType"].Value;
}
if (node.Attributes["StringFormat"] != null)
{
header.StringFormat = node.Attributes["StringFormat"].Value;
}
if (node.Attributes["MappingTo"] != null)
{
header.MappingTo = node.Attributes["MappingTo"].Value;
}
if (node.Attributes["Width"] != null)
{
string width = node.Attributes["Width"].Value;
if (Regexlib.MatchInt(width))
{
header.Width = int.Parse(width);
}
}
foreach (XmlNode subNode in node.ChildNodes)
{
header.Mapping.Add(new Mapping
{
Original = subNode.Attributes["Original"].Value,
Target = subNode.Attributes["Target"].Value
});
}
headerList.Add(header);
}
return(headerList);
}
/// <summary>
/// ListToMemoryStream
/// </summary>
/// <param name="list">数据源</param>
/// <param name="nameList">列头信息</param>
public MemoryStream Export <T>(BindingList <T> list, string strHeaderText, List <ExcelHeader> hearderList)
{
HSSFWorkbook workbook = new HSSFWorkbook();
HSSFSheet sheet = workbook.CreateSheet(strHeaderText);
#region 文件属性信息
{
DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();
dsi.Company = this.Author;
workbook.DocumentSummaryInformation = dsi;
SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
si.Author = Author;
si.ApplicationName = ApplicationName;
si.Comments = Comments;
si.Title = strHeaderText;
si.Subject = strHeaderText;
si.CreateDateTime = DateTime.Now;
workbook.SummaryInformation = si;
}
#endregion
#region 列头及样式
{
HSSFRow headerRow = sheet.CreateRow(0);
HSSFCellStyle headStyle = workbook.CreateCellStyle();
headStyle.Alignment = CellHorizontalAlignment.CENTER;
HSSFFont font = workbook.CreateFont();
font.FontHeightInPoints = 10;
font.Boldweight = 600;
headStyle.SetFont(font);
headStyle.FillForegroundColor = NPOI.HSSF.Util.HSSFColor.LIGHT_GREEN.index;
headStyle.FillPattern = CellFillPattern.SOLID_FOREGROUND;
headStyle.FillBackgroundColor = NPOI.HSSF.Util.HSSFColor.LIGHT_TURQUOISE.index;
headStyle.BorderBottom = CellBorderType.THIN;
headStyle.BorderLeft = CellBorderType.THIN;
headStyle.BorderRight = CellBorderType.THIN;
headStyle.BorderTop = CellBorderType.THIN;
for (int i = 0; i < hearderList.Count; i++)
{
headerRow.CreateCell(i).SetCellValue(hearderList[i].HeaderText);
headerRow.GetCell(i).CellStyle = headStyle;
sheet.SetColumnWidth(i, hearderList[i].Width * 40);//设置列宽
}
headerRow.Dispose();
}
#endregion
int rowIndex = 1;
HSSFRow dataRow;
HSSFCellStyle style = workbook.CreateCellStyle();
style.BorderBottom = CellBorderType.THIN;
style.BorderLeft = CellBorderType.THIN;
style.BorderRight = CellBorderType.THIN;
style.BorderTop = CellBorderType.THIN;
foreach (Object obj in list)
{
dataRow = sheet.CreateRow(rowIndex);
PropertyInfo[] pis = obj.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance);//就是这个对象所有属性的集合
if (pis != null)
{
for (int j = 0; j < hearderList.Count; j++)
{
HSSFCell newCell = dataRow.CreateCell(j);
ExcelHeader eh = hearderList[j];
newCell.CellStyle = style;
foreach (PropertyInfo pi in pis)//针对每一个属性进行循环
{
if (eh.PropertyName.Equals(pi.Name))
{
object PropertyValue = pi.GetValue(obj, null);
if (PropertyValue != null)
{
string drValue = PropertyValue.ToString();
switch (PropertyValue.GetType().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);
if (eh.StringFormat != null)
{
newCell.SetCellValue(string.Format(eh.StringFormat, dateV));
}
else
{
newCell.SetCellValue(string.Format("{0:yyyy-MM-dd}", 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;
}
}
}
}
}
}
rowIndex++;
}
MemoryStream ms = new MemoryStream();
workbook.Write(ms);
ms.Flush();
ms.Position = 0;
sheet.Dispose();
workbook.Dispose();
return(ms);
}
