I'm new to C#, coming from Java, and I'd like to check whether a certain object is a Number (it can be an Integer, Double, Float, etc). In Java I did this by saying if (toRet instanceof Number)
. I'm hoping there's a similar C# thing like if (toRet is Number)
but thus far I haven't been able to find a Number class that does this. Is there a way to do this, or do I have to manually check for Integer, Double, etc?
Edit for more info: Basically what I want to do is eventually have a byte array. However, when the array is stored in a text file, the parser I'm using can sometimes think it's an integer array or a double array. In Java, I had this:
JSONArray dblist = (JSONArray)result_;
byte[] reallyToRet = new byte[dblist.size()];
Object toComp = dblist.get(0);
if (toComp instanceof Number)
for (int i=0; i < dblist.size(); ++i) {
byte elem = ((Number) dblist.get(i)).byteValue();
reallyToRet[i] = elem;
}
return reallyToRet;
}
The important bit here is the if statement. Sometimes the objects in dblist
would parse as integers, sometimes as doubles, and only rarely as bytes, but all I really care about at the end is the byte value.
Well, yeah, but it's an extension method that just ORs all the possibilities.
This is it:
public static bool IsNumber(this object value)
{
return value is sbyte
|| value is byte
|| value is short
|| value is ushort
|| value is int
|| value is uint
|| value is long
|| value is ulong
|| value is float
|| value is double
|| value is decimal
|| value is BigInteger;
}
and you would use it like this:
if (toRet.IsNumber());
This needs to be in a static class
.
I am not sure about any class for that. But you can check for instance, for integer see
int val;
if(Int32.TryParse(integer, out val))
else
Unlikely, you can use Double.TryParse(number, out val) etc.
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