public static List <EntityBase> GetEntities(Type importType, ExcelFileInfo fileInfo, out List <EntityBase> errors)
{
using (var npoiHelper = new NPOIExcelHelper(fileInfo.FilePathAndName))
{
var dtExcelData = npoiHelper.ExcelToDataTable(string.Empty, fileInfo.ColumnNameRow);//展示只支持取第一个sheet
if (dtExcelData.Rows.Count <= 0)
{
throw new Exception("SimpleUploadExcelHelper-Exception:Excel中没有填写数据");
}
errors = new List <EntityBase>();
var allEntities = new List <EntityBase>();
var entities = new List <EntityBase>();
var fields = importType.GetFields();
var properties = importType.GetProperties();
var isCellValid = true;
Dictionary <string, DataTable> allDataSource = new Dictionary <string, DataTable>();
foreach (System.Data.DataRow dtRow in dtExcelData.Rows)
{
var concreteObject = (EntityBase)Activator.CreateInstance(importType);
foreach (var property in properties)
{
var excelColumnAttribute = property.GetCustomAttribute <ExcelColumnAttribute>(false);
#region 给原始导入属性赋值
if (property.Name == "OriginalData")
{
var propertySetMethod = property.GetSetMethod();
//BindingFlags flag = BindingFlags.Public | BindingFlags.Instance;
propertySetMethod.Invoke(concreteObject, new object[] { dtRow });
}
#endregion
#region 根据Attribute校验Excel的原始导入值是否校验通过，校验不通过则加到错误实体，通过则加到正确实体
if (excelColumnAttribute != null)
{
var propertySetMethod = property.GetSetMethod();
//BindingFlags flag = BindingFlags.Public | BindingFlags.Instance;
isCellValid = true;
var cellVal = dtRow[excelColumnAttribute.ColumnName].ToString();
#region DataSourceAttribute
var datasourceAttribute = property.GetCustomAttribute <DataSourceBaseAttribute>();
var datasourceFieldAttribute = property.GetCustomAttribute <DataSourceFieldAttribute>();
var isDatasource = datasourceAttribute != null && datasourceFieldAttribute != null;
if (isDatasource)
{//两者必须成対的出现
var dt = new DataTable();
#region 类型的数据源拿过一次后确保不会重复拿
var dataSourceTypeName = datasourceAttribute.GetType().Name;
if (allDataSource.ContainsKey(dataSourceTypeName))
{
dt = allDataSource[dataSourceTypeName];
}
else
{
dt = datasourceAttribute.GetDataSource();
allDataSource.Add(dataSourceTypeName, dt);
}
#endregion
var keyFieldName = datasourceFieldAttribute.KeyFieldName;
var valFieldName = datasourceFieldAttribute.ValueFieldName;
if (!string.IsNullOrEmpty(cellVal))
{
var dr = dt.Select(keyFieldName + "='" + cellVal + "'");
if (!dr.Any())
{
concreteObject.AppendError(excelColumnAttribute.ColumnName + "值" + cellVal + datasourceFieldAttribute.ErrorMsg);
}
else
{
var propertyType = property.PropertyType;
if (propertyType.IsEnum)
{
propertySetMethod.Invoke(concreteObject, new object[] { Enum.Parse(propertyType, dr[0][valFieldName].ToString()) });
}
else
{
propertySetMethod.Invoke(concreteObject, new object[] { Convert.ChangeType(dr[0][valFieldName], propertyType) });
}
}
}
}
#endregion
#region 校验Atrribute
var validAttributes = property.GetCustomAttributes <ValidBaseAttribute>();
foreach (var validAttribute in validAttributes)
{
if (!validAttribute.Valid(cellVal))
{//记录校验错误
isCellValid = false;
concreteObject.AppendError(excelColumnAttribute.ColumnName + "值" + cellVal + validAttribute.ErrorMsg);
}
}
if (isCellValid && !isDatasource)
{
propertySetMethod.Invoke(concreteObject, new object[] { Convert.ChangeType(cellVal, property.PropertyType) });
}
#endregion
}
#endregion
}
allEntities.Add(concreteObject);
}
#region 如果有用户自定义所有实体处理
var handlerType = importType.GetCustomAttribute <EntitiesHandlerAttribute>();
if (handlerType != null)
{
allEntities = ReolveAndDoHandler(handlerType.HandlerName, allEntities);
}
#endregion
#region 区分校验正确与错误的实体
foreach (var entity in allEntities)
{
#region 校验不通过则加到错误实体，通过则加到正确实体
if (entity.IsValid())
{
entities.Add(entity);
}
else
{
errors.Add(entity);
}
#endregion
}
#endregion
return(entities);
}
}
