in c# how to convert an varto a char array. char[8] array I can guarantee this var is not too big.
such as, I have
var a = 634711440648369988;
and I want char[8] c store it.
How to do this conversion correctly? Thanks.
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I changed my question from "int" to "var". Just let you know. Sorry for inconvenientAnders Lind– Anders Lind2012-04-28 00:22:11 +00:00Commented Apr 28, 2012 at 0:22
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2Are you trying to store the 8 bytes that make up a long in a "char" array? A c# char isn't the same as a c char.user287466– user2874662012-04-28 00:24:30 +00:00Commented Apr 28, 2012 at 0:24
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5 Answers
2 Comments
Anders Lind
how to make sure my result array has size of 8? This is very important for me
Ben Voigt
@Anders: It depends on which overload you choose.
Int64 or UInt64 inputs will produce 8 bytes out. Int32 or UInt32 inputs produce 4 bytes out. And so on. So use ulong a = 634711440648369988; instead of var, to guarantee the exact size.You can just cast it to a string and use the ToCharArray method.
char [ ] c = a.ToString().ToCharArray();
3 Comments
Adam Mihalcin
Calling
toString isn't a cast, though. It's a method call.Anders Lind
how to make sure my result array has size of 8? This is very important for me
David Heffernan
@AndersLind if you call
a.ToString().ToCharArray(), then the array can be pretty any length between 1 to the maximimum number of decimal digits in your number.In C# there is no such thing as char[8]. An array of char would be char[].
I guess you are coming at this from a C++ viewpoint and actually want an array of bytes, of length 8. In which case the type you need is byte[]. Note that you want byte[] rather than char[] since char in C# is a 16 bit data type.
You can obtain what you need by calling BitConverter.GetBytes(). When you call this function passing an 8 byte integer, the returned array will be a byte[] with length equal to 8, as stated in the documentation.
answered Apr 28, 2012 at 0:21
David Heffernan
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Comments
int a = 123412;
char[] d = a.ToString().ToCharArray();
foreach (char c in d)
{
Console.WriteLine(c);
}
Comments
Thank you everyone. I seen the question for different type. Therefore, I'm writing different types. Firstly, I did split the string to string array, Secondly, I did convert the string array to var array, Thirdly, I did convert var array to char array.
string input="q;w;e;r;t;y";
string[] roleSplit = new string[input.Length];
roleSplit = input.Split(';');
var varArray = roleSplit.SelectMany(x => x.ToCharArray());
char[] charArray = varArray.ToArray();
