tryparse

I know.. I know... Performance is not the main concern here, but just for curiosity, what is better? bool parsed = int.TryParse(string, out num); if (parsed) ... OR try { int.Parse(string); } catch () { do something... } Better is highly subjective. For instance, I personally prefer int.TryParse , since I most often don't care why the parsing fails, if it fails. However, int.Parse can (according to the documentation ) throw three different exceptions: the input is null the input is not in a valid format the input contains a number that procudes an overflow If you care about why it fails, then

I have the following date in string format "2011-29-01 12:00 am" . Now I am trying to convert that to datetime format with the following code: DateTime.TryParse(dateTime, out dt); But I am alwayws getting dt as {1/1/0001 12:00:00 AM} , Can you please tell me why ? and how can I convert that string to date. EDIT: I just saw everybody mentioned to use format argument. I will mention now that I can't use the format parameter as I have some setting to select the custom dateformat what user wants, and based on that user is able to get the date in textbox in that format automatically via jQuery

Here is my Problem. I need to Convert say "5.550" (string) to double as 5.550 that is double with 3 decimal digits. i have tried IFormatProvider while parsing but no use.it keeps skipping last zero(). Please advice. Thanks, Kumar M A double doesn't keep insignificant digits - there's no difference between 1.5 and 1.50000 as far as double is concerned. If you want to preserve insignificant digits, use decimal instead. It may well be more appropriate for you anyway, depending on your exact context. (We have very little context to go on here...) 来源： https://stackoverflow.com/questions/19574656

For some reason the following C# Console program always outputs: 32 False wtf=0 What am I doing wrong? using System.Collections.Generic; using System.Linq; using System.Text; using System.Globalization; namespace ConsoleApplication1 { class Program { static void Main(string[] args) { Console.WriteLine(Convert.ToUInt32("0x20", 16)); UInt32 wtf = 0; Console.WriteLine(UInt32.TryParse("0x20", NumberStyles.HexNumber, // I've tried also AllowHexSpecifier CultureInfo.InvariantCulture, // I've also tried CurrentCulture out wtf)); Console.WriteLine("wtf={0}", wtf); } } } Peter You need to drop the "0x"

I'm writing a custom string to decimal validator that needs to use Decimal.TryParse that ignores culture (i.e. doesn't care if the input contains "." or "," as decimal point separator). This is the suggested method: public static bool TryParse( string s, NumberStyles style, IFormatProvider provider, out decimal result ) I can't figure out what to use as the 3rd parameter. The examples I've seen look like this: culture = CultureInfo.CreateSpecificCulture("en-GB"); Decimal.TryParse(value, style, culture, out number) so they create a specific culture. CultureInfo does not have a

I'm running into a behavior I wasn't expecting when using Enum.TryParse. If I have an enum: public enum MyEnum { ValueA, ValueB, ValueC } And then I pass a numeric value (as a string) into Enum.TryParse, like: MyEnum outputEnum; bool result = Enum.TryParse("1234", out outputEnum); Despite the string "1234" not being a possible value, result will come back as true, and my outputEnum will have a value of 1234. Is there a way I can avoid this sort of behavior? I'm trying to write a function which will process arbitrary string input as an enum, and this has thrown a bit of a monkeywrench in my bad

I find myself often needing to use Integer.TryParse to test if a value is an integer. However, when you use TryParse, you have to pass a reference variable to the function, so I find myself always needing to create a blank integer to pass in. Usually it looks something like: Dim tempInt as Integer If Integer.TryParse(myInt, tempInt) Then I find this to be quite cumbersome considering that all I want is a simple True / False response. Is there a better way to approach this? Why isn't there an overloaded function where I can just pass the value I want to test and get a true / false response? No