I think that Datagrid is very useful. However, there are some glitch in Datagrid.
For example, it is as follows.
A sign of two above is the sign that should escape by the general development, but works like a query when I input in search field.
2.If I specify the related Enumeration or Boolean as DropDown of the search condition, only the elements found up to line 1000 are displayed as pull-down elements.
Since boolean has only two elements, I think that program does not need to search data source.