接昨天的导出
导入excel内容
对比昨天导出的内容增加了一行实体属性名称作为标题行,这样到转换为实体的时候才能找到对应的属性。
导入代码
代码语言:javascript复制public IActionResult InportExcel()
{
var file = "D:\a.xls";
var excelHeper = new ExcelHelper();
var dt = excelHeper.ExcelImport(file,2);
var list = dt.ToList<Student>();
return Content("");
}
excel文件路径可以通过上传控件上传到服务器再读取。
注意
如果你导入和发现bool类型不能正确读取请修改一下两个文件的两个地方:
DataTableExtensions的public static IEnumerable ToList(this DataTable dt) where T : class, new()方法增加一个bool类型判断
代码语言:javascript复制else if (p.PropertyType == typeof(bool))
{
p.SetValue(ob, bool.Parse(row[p.Name].ToString()), null);
}
ExcelHelper的private DataTable ReadSheetToDataTable(int headerRowNo, ISheet sheet)方法替换为如下代码或增加一个bool类型判断
代码语言:javascript复制private DataTable ReadSheetToDataTable(int headerRowNo, ISheet sheet)
{
var dt = new DataTable();
IRow headerRow = sheet.GetRow(headerRowNo);
int cellCount = headerRow.LastCellNum;
for (int j = 0; j < cellCount; j )
{
ICell cell = headerRow.GetCell(j);
dt.Columns.Add(cell.ToString());
}
for (int i = (headerRowNo 1); i <= sheet.LastRowNum; i )
{
IRow row = sheet.GetRow(i);
DataRow dataRow = dt.NewRow();
for (int j = 0; j < cellCount; j )
{
if (row.GetCell(j) == null)
{
continue;
}
ICell cell = row.GetCell(j);
switch (cell.CellType)
{
case CellType.Unknown:
case CellType.Error:
throw new Exception($"第{i 1}行,列【{dt.Columns[j].ColumnName}】,单元格格式错误");
break;
case CellType.Numeric:
if (DateUtil.IsCellDateFormatted(cell))
{
dataRow[j] = cell.DateCellValue;
}
else
{
dataRow[j] = cell.NumericCellValue;
}
break;
case CellType.Blank:
dataRow[j] = "";
break;
case CellType.Boolean:
dataRow[j] = cell.BooleanCellValue;
break;
case CellType.Formula:
dataRow[j] = cell.CellFormula ;
break;
case CellType.String:
default:
dataRow[j] = cell.StringCellValue;
break;
}
//dataRow[j] = row.GetCell(j).ToString();
}
bool existsValue = false;
foreach (DataColumn column in dt.Columns)
{
if (dataRow[column.ColumnName] == null || string.IsNullOrEmpty(dataRow[column.ColumnName].ToString()))
{
continue;
}
existsValue = true;
break;
}
if (existsValue)
{
dt.Rows.Add(dataRow);
}
}
return dt;
}