public T2 Max <T2>(Expression <Func <T, T2> > expression)
{
string prop = ExpressionHelper.GetExpressionMemberName(expression);
ColumnMapping column = TableMapping.GetColumnMappingByProperty(prop);
return((T2)base.Max(column != null ? column.Name : prop));
}
public Criteria <T> AddConditionPropertyValues(SqlConditionType type, string prop, IList vals)
{
ColumnMapping column = TableMapping.GetColumnMappingByProperty(prop);
this.AddConditionColumnValues(type, column != null ? column.Name : prop, vals);
return(this);
}
public Criteria <T> AddUpdateProperty(Expression <Func <T, object> > expression, object val)
{
string prop = ExpressionHelper.GetExpressionMemberName(expression);
ColumnMapping column = TableMapping.GetColumnMappingByProperty(prop);
this.UpdateParameters.Add(new SqlParameter(column != null ? column.Name : prop, val));
return(this);
}
public Criteria <T> AddOrderProperty(Expression <Func <T, object> > expression, SqlOrderType type = SqlOrderType.ASC)
{
string prop = ExpressionHelper.GetExpressionMemberName(expression);
ColumnMapping column = TableMapping.GetColumnMappingByProperty(prop);
base.AddOrderColumn(column != null ? column.Name : prop, type);
return(this);
}
public Criteria <T> AddProperty(Expression <Func <T, object> > expr)
{
var memberExpression = expr.Body as MemberExpression;
if (memberExpression == null)
{
AnonymousObjectPropertiesExpressionVisitor Visitor = new AnonymousObjectPropertiesExpressionVisitor();
Visitor.Visit(expr);
foreach (var prop in Visitor.Properties)
{
ColumnMapping column = TableMapping.GetColumnMappingByProperty(prop);
base.AddColumn(column != null ? column.Name : prop);
}
}
else
{
string prop = memberExpression.Member.Name;
ColumnMapping column = TableMapping.GetColumnMappingByProperty(prop);
base.AddColumn(column != null ? column.Name : prop);
}
return(this);
}
public int Update(Expression <Func <object> > expression)
{
HashSet <string> props = ExpressionHelper.GetExpression_PropertyList(expression);
if (props.Count == 0)
{
throw new ObjectMappingException("not any property updated!");
}
object obj = expression.Compile()();
Type objType = obj.GetType();
foreach (var prop in props)
{
var val = objType.GetProperty(prop).GetValue(obj, null);
ColumnMapping column = TableMapping.GetColumnMappingByProperty(prop);
this.UpdateParameters.Add(new SqlParameter(column != null ? column.Name : prop, val));
}
DatabaseEngine db = DatabaseEngineFactory.GetDatabaseEngine();
return(db.Update(this));
}
public virtual int Update(TableMapping table, object obj, HashSet <string> updateprops)
{
Criteria criteria = new Criteria(table);
criteria.AddEqualTo(table.ColumnPK.Name, table.ColumnPK.GetValue(obj));
if ((updateprops != null) && (updateprops.Count > 0))
{
foreach (string propname in updateprops)
{
ColumnMapping column = table.GetColumnMappingByProperty(propname);
if (column == null)
{
continue;
}
if ((column.IsPK == false) && (column.IsAutoIncrement == false))
{
criteria.AddUpdateColumn(column.Name, column.GetValue(obj));
}
else
{
throw new ObjectMappingException(propname);
}
}
}
else
{
foreach (ColumnMapping column in table.Columns)
{
if ((column.IsPK == false) && (column.IsAutoIncrement == false))
{
criteria.AddUpdateColumn(column.Name, column.GetValue(obj));
}
}
};
return(this.Update(criteria));
}
