大约有 43,000 项符合查询结果（耗时：0.0371秒） [XML]
nullable object must have a value
... resolved my problem, i just change null able object to non null able, and convert datetime to string directly, not by datetimeobject.value.datetime.tostring()
– adnan
Dec 28 '16 at 12:41
...
Convert an image (selected by path) to base64 string
How do you convert an image from a path on the user's computer to a base64 string in C#?
12 Answers
...
Why is iostream::eof inside a loop condition (i.e. `while (!stream.eof())`) considered wrong?
...ful.
// if it wasn't, the returned stream from operator>> would be converted to false
// and the loop wouldn't even be entered
// do stuff with correctly initialized data (hopefully)
}
And on your second question: Because
if(scanf("...",...)!=EOF)
is the same as
if(!(inStream >&...
Is it better practice to use String.format over string Concatenation in Java?
...
@AmirRaminar: The compiler converts "+" to calls to StringBuilder automatically.
– Martin Schröder
Feb 23 '12 at 14:50
43
...
Java equivalent of unsigned long long?
...gs (what "wrapping integer" types are). Any size number should implicitly convert to any size ring, but rings should only convert to numbers via function or via explicit typecast to the same size number. The behavior of C, where unsigned types generally behave as algebraic rings but sometimes beha...
(-2147483648> 0) returns true in C++?
...whose integer conversion rank (4.13) is less than the rank of
int can be converted to a prvalue of type int if int can represent all
the values of the source type; otherwise, the source prvalue can be
converted to a prvalue of type unsigned int.
...
How to get current time and date in C++?
...
std C libraries provide time().
This is seconds from the epoch and can be converted to date and H:M:S using standard C functions. Boost also has a time/date library that you can check.
time_t timev;
time(&timev);
sha...
How can I truncate a double to only two decimal places in Java?
...
Formating as a string and converting back to double i think will give you the result you want.
The double value will not be round(), floor() or ceil().
A quick fix for it could be:
String sValue = (String) String.format("%.2f", oldValue);
Double ...
Encrypting & Decrypting a String in C# [duplicate]
... cryptoStream.Close();
return Convert.ToBase64String(cipherTextBytes);
}
}
}
}
}
}
public static string Decrypt(string cipherText, string ...
How to get the unix timestamp in C#
...
Error for the second solution: Cannot convert source type 'double' to target type 'long'.
– Pixar
Sep 4 '15 at 15:45
...