导入Excel（xlsx）到List

Posted 2022-03-29 starts

/// <summary>
/// 导入Excel（xlsx）到List
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="stream"></param>
/// <param name="sheetIndex">从零开始sheet索引</param>
/// <param name="headerRowCount">表头行数，即从此开始读取数据</param>
/// <returns></returns>
public static List<T> ExcelToList<T>(MemoryStream stream,int sheetIndex, int headerRowCount)

List<T> list = new List<T>();
IWorkbook workbook = new XSSFWorkbook();
try

workbook = new XSSFWorkbook(stream);
ISheet sheet = workbook.GetSheetAt(sheetIndex);
IRow cellNum = sheet.GetRow(0);
var propertys = typeof(T).GetProperties();
string cellValue = null;
int lastCellNum = cellNum.LastCellNum;

for (int i = headerRowCount; i <= sheet.LastRowNum; i++)

IRow row = sheet.GetRow(i);
var tInstance = System.Activator.CreateInstance<T>();
for (int j = 0; j < lastCellNum; j++)

cellValue = row.GetCell(j) != null ? row.GetCell(j).ToString() : null;

string propertyTypeFullName = (propertys[j].PropertyType).FullName;

if (IsNullableType(propertys[j].PropertyType))

if (string.IsNullOrWhiteSpace(cellValue))

propertys[j].SetValue(tInstance, null, null);
continue;

propertyTypeFullName = Nullable.GetUnderlyingType(propertys[j].PropertyType).FullName;

switch (propertyTypeFullName)

case "System.String":
propertys[j].SetValue(tInstance, cellValue, null);
break;
case "System.DateTime":
DateTime dtParam = Convert.ToDateTime(cellValue, CultureInfo.InvariantCulture);
propertys[j].SetValue(tInstance, dtParam, null);
break;
case "System.Boolean":
bool blParam = Convert.ToBoolean(cellValue);
propertys[j].SetValue(tInstance, blParam, null);
break;
case "System.Int16":
short int16Param = Convert.ToInt16(cellValue);
propertys[j].SetValue(tInstance, int16Param, null);
break;
case "System.Int32":
int int32Param = Convert.ToInt32(cellValue);
propertys[j].SetValue(tInstance, int32Param, null);
break;
case "System.Int64":
long int64Param = Convert.ToInt64(cellValue);
propertys[j].SetValue(tInstance, int64Param, null);
break;
case "System.Byte":
byte btPrame = Convert.ToByte(cellValue);
propertys[j].SetValue(tInstance, btPrame, null);
break;
case "System.Single":
float sgParam = Convert.ToSingle(cellValue);
propertys[j].SetValue(tInstance, sgParam, null);
break;
case "System.Double":
double dbParam = Convert.ToDouble(cellValue);
propertys[j].SetValue(tInstance, dbParam, null);
break;
default:
propertys[j].SetValue(tInstance, null, null);
break;

list.Add(tInstance);

stream.Flush();
stream.Close();
workbook.Close();

finally

stream.Close();
workbook.Close();

return list;