具有实体框架的可空小数问题

Question

I'm using EF with Oracle, and I have a table with a nullable float column. When I map this table, the column shows up as a Nullable Decimal.

In this table I inserted a row, in the nullable column, I inserted this number:

0.0237786257912282

Then, I call the table with LINQ:

lList = db.EntTest.ToList();

Doing that, Visual Studio throws a

System.InvalidCastException

If I update the record, removing the number and them I call the list again, it works.

Any suggestions?

Answer 1

As StevePy says, using

HasPrecision 

on OnModelCreating function in the Context.cs works, for example:

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
    modelBuilder.Entity<EntTest>().Property(p => p.NUMBER).HasPrecision(15,30);
}