I am seen in darkness and in light, What am I? tbLastName.Text : DBNull.Value; Why is this impossible, and any suggestion what else to try? x = GetBoolValue() ? 10 : null; Simple, if the method returns true, assign 10 to the Nullableint x. Browse other questions tagged c# .net nullable conditional-operator or ask your own question. have a peek here
as the gentleman with 70 upvotes suggests, or cast null to Object or to ValueType). Otherwise, assign null to the nullable int. There's no implicit conversion between those two hence the error message. It might be the tiniest bit less ugly than the cast: int?
Since the compiler implictitly decides that 10 is an int it then decides that the return type of this expression shall be an int as well. What do I do? x = GetBoolValue() ? (int?)10 : null; int? No Implicit Conversion Between 'system.dbnull' And 'string' No implicit conversion between null and int 38 Why is this code invalid in C#? -1 Assign nullable int to int in ternary operator 2 Simple way to parse bool?
This is just an example. Lab colleague uses cracked software. OBDII across the world? http://stackoverflow.com/questions/858080/nullable-types-and-the-ternary-operator-why-is-10-null-forbidden You have two ways of solving that: First is to make null compatible with DateTime (for instance, cast null to DateTime?
why does this error keep popping out? Conditional Operator C# ResultofSomeCalc() : default(int?); This use of default doesn't seem to be well documented, but is does work. If x is the null literal and y has a non-nullable value type Y, then the type of the conditional expression is a nullable value type whose underlying type is Y. There's no implicit conversion between those two hence the error message.
Straight line equation When does TNG take place in relation to DS9? http://stackoverflow.com/questions/16503266/type-of-conditional-expression-cannot-be-determined-because-there-is-no-implicit share|improve this answer answered Oct 20 '08 at 23:30 add a comment| up vote 0 down vote Make your function ResultOfSomeCalc()'s return type as nullabel int like (int?) int? Type Of Conditional Expression Cannot Be Determined Dbnull Or a user-defined class with implicit conversion from float? No Implicit Conversion Between 'system.dbnull' And 'int' If your function returns int, then the compiler issues the warning: Type of conditional expression cannot be determined because there is no implicit conversion between 'int' and '' I'm guessing that
Can an object *immediately* start moving at a high velocity? http://bovbjerg.net/cannot-be/unable-to-sync-iphone-apps-cannot-be-determined.php int has a predefined operator==(int, int), so a lifted operator==(int?, int?) automatically exists which is chosen here. Isn't AES-NI useless because now the key length need to be longer? You signed in with another tab or window. Type Of Conditional Expression Cannot Be Determined Because Implicitly Convert To One Another
The null coalesce will assign DateTime(0) to value if foo is null. By casting the null to a Nullable
Here x is of type int and y is of type int?. C# Null Conditional Operator foo; foo = true ? Sounds kinda smelly to be storing Ages as a string, though - consider maybe using IEnumerable
axel-habermaier commented Feb 12, 2015 supercat explained the potential problems with that -- still, it might be worth considering to allow it whenever the types could be determined unambiguously...
I was simply suggesting to use a similar behavior as lifted operators. rskopecek commented Feb 12, 2015 +1 that is very irritating. number = true ? (int?)5 : null; both compile!! Object Cannot Be Cast From Dbnull To Other Types Join them; it only takes a minute: Sign up Type of conditional expression cannot be determined because there is no implicit conversion between 'int' and
What do you call the practice of using (overly) complex words specific to a subject? Both expressions in the conditional operator "?:" must have the same type, or must be convertible to the same type via an implicit cast. What is the meaning of ''cry oneself"? this contact form TSA broke a lock for which they have a master key.
The lifted form is constructed by adding a single ? Untyped null is inferred to be object. Is it possible for a diesel engine computer to detect (and prevent) a runaway condition? Let X and Y be the types of the second and third operands.
someValue = SomeCondition ? x = GetBoolValue() ? 10 : (int?)null; The reason you see this is because behind the scenes you're using Nullable and you need to tell C# that your "null" is a