How do I convert them to a list string from an object? Asking for help, clarification, or responding to other answers. How to describe a scene that a small creature chop a large creature's head off? Temporary policy: Generative AI (e.g., ChatGPT) is banned, C# convert List to List, Issue with IQueryable and List, Patterns for string manipulation (in C# or other languages), Convert List to List based on property fed in at runtime, Generic method to recive any type of object and convert the object to a List, converting a generic list to string array, convert list of objects to list of strings and generics, Generic List to List of string for single Property, Conversion of object List to Generic List, Convert a generic collection to a List of strings, Converting List> to List>. Electrical box extension on a box on top of a wall only to satisfy box fill volume requirements. Connect and share knowledge within a single location that is structured and easy to search. Update any date to the current date in a text file. var dList = new List<dynamic> () { /*.initialize list */ }; If you are interested in extracting all the strings in the collection, ignoring all other types, you can use: // Solution 1: Include only strings, no null values, no exceptions thrown var strings = dlist.OfType<string> ().ToList (); If you are certain that all the items in the . In TikZ, is there a (convenient) way to draw two arrow heads pointing inward with two vertical bars and whitespace between (see sketch)? How to convert Object to List in c#? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Instead of throwing an exception if the conversion is unsuccessful, the TryParse() method returns a boolean value indicating whether or not the conversion was successful. If you're really just dealing with these three types, though, then you're in luck because it's pretty easy: I ran into same problem - I have a collection which data type is only known at run time and I can't cast it to anything. - Why is "anything" used? Convert.ToString(obj) Successed Select each item in it and execute ToString() on it. obj.ToString() Successed In the above example, we used ToString() method in basic logic that is we can create two classes and has one method. Test Data Generation With AutoFixture in .NET. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. We'll define what each one does, then provide a use-case example for when you might use this code. Now i nedd do Cast Back to List to perfom a foreach, some like this: But obj content change every time, and i have some like this: I have another variable holding current obj Type: Obs: I no the current type in the list but i need to cast , and i dont now another form instead: Lots of trial and error gave me this on SL 5 but it should also work on a regular C#. Which is why I commented the poster obviously never learned the language. Temporary policy: Generative AI (e.g., ChatGPT) is banned. you need to why some of the cases fail. Similarly for DBNull to string. Just a matter of opinion really. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Did the ISS modules have Flight Termination Systems when they launched? Lets use the DateTimeStyles.AssumeUniversal for this example: Since we dont specify the time zone, the string format is assumed to be UTC. This is because there is no type conversion defined from Integer to String. import csv with open ('YourCSVFile.csv') as csv_file: reader = csv.reader (csv_file, delimiter=',') rows = list (reader) listItems = rows [0] Not sure how this is related to the question. The Parse() method will parse the string to a DateTime in fr-FR format 15/01/2023 10:12:12 AM. How to cast List to List, How to cast a list of specific type to a list of generic type in c#, Cast Object into Generic List to get List of Items, Cast instance in list to its generic interface. To learn more, see our tips on writing great answers. Can help me with the next conversion, I'm trying to convert a custom object to list, I have the next parameter like list object, I'm working with asp.net core 3.1. when convert with the next statement of code the result is. To Convert a list to string in java, You can do by, 1. Latex3 how to use content/value of predefined command in token list/string? I'm confused, because the docs explicitly say they won't work (require string, not object). Connect and share knowledge within a single location that is structured and easy to search. You can specify / write the iteration in different ways (foreach(), or .ConvertAll() or whatever), but in the end, one way or another, some code is going to iterate over each and every element and convert it. ", I think what you really want may be a SelectMany. Here we convert the object to a string by using the Object.toString() method for translating the object to string values. Check MSDN for more details. Unicode objects are converted to C strings using 'utf-8' encoding. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Choose the one that pleases you more. We can also override this method whenever we used it on a specific area of the code also it always returns the string that represents and create the object instance whenever necessary for the application. Electrical box extension on a box on top of a wall only to satisfy box fill volume requirements, Output a Python dictionary as a table with a custom format, 1960s? @MelihMucuk yes it does, See my updated version where I replaced the. Ask Question Asked 12 years, 4 months ago Modified 2 years ago Viewed 376k times 135 I have a string: var names = "Brian,Joe,Chris"; Is there a way to convert this to a List<string> delimited by , in one line? Ever learned the language in a structured way? Convert Character List To String 7. why does music become less harmonic if we transpose it down to the extreme low end of the piano? Share The combination of a language and a region is known as a culture. The first four parameters in this overload are similar to the ones in the ParseExact(String, String, IFormatProvider, DateTimeStyles) overload, but with an additional out DateTime parameter. (string)obj Successed By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Lets use the DateTimeStyles.AdjustToUniversal for this example: Using AdjustToUniversal as the DateTimeStyle option means that the parsedDate variable will receive the date and time in Coordinated Universal Time (UTC) format. How does one transpile valid code that corresponds to undefined behavior in the target language? How to inform a co-worker about a lacking technical skill without sounding condescending, Idiom for someone acting extremely out of character. By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. How should I ask my new chair not to hire someone? I test something about convert object to string on C#.Net . Thanks for contributing an answer to Stack Overflow! 1960s? Can renters take advantage of adverse possession under certain situations? For example: Thanks for contributing an answer to Stack Overflow! Is there a way to convert a List (of Object) to a List (of String) in c# or vb.net without iterating through all the items? @DanielSchaffer I read the question as: you have a. Shoot for writing code that is clear and understandable, not ways to fit an operation into as small a space as possible. What was the symbol used for 'one thousand' in Ancient Rome? In Java, you can convert an object to a string using the toString () method, which is a method of the Object class. The combination of a language and a region is known as a culture. The one and only resource you'll ever need to learn APIs: Want to kick start your web development in C#? Wrap the result into a list. Thanks for contributing an answer to Stack Overflow! so you are building a list of type names. As a side note, DateTime struct gives you quite a few methods to return different forms of date and time strings. Finally I solved it by serializing to JSON and de-serializing back. Can the supreme court decision to abolish affirmative action be reversed at any time? This worked from me in Unity where the other answers did not. The TryParse() method is a safer and more convenient way of converting strings to DateTime objects. This is a guide to C# Object to String. You also need to add LINQ to your using list for the last half to work. 1 answer Sort by: Most helpful Bruce (SqlWork.com) 38,066 Oct 15, 2021, 3:49 PM the ToString () method of an object returns the type name. Check out the following link regarding the as keyword: https://msdn.microsoft.com/en-us/library/cscsdfbt.aspx#Anchor_0. Is there any particular reason to only include 3 out of the 6 trigonometry functions? By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. I don't understand. string User: User name to use for Authentication. @Dan: I agree, and generally I do use the params overload. Share. Changing unicode font for just one symbol. Can converting a string to a List be simplified? I want to convert List<String> to List<Object>. By using the CultureInfo.InvariantCulture and DateTimeStyle.None, we should expect the parsed DateTime to be 1/15/2023 12:00:00 AM. The List has a constructor that accepts an IEnumerable: I prefer this because it prevents a single item list with an empty item if your source string is empty: Split a string delimited by characters and return all non-empty elements. This will give you much more flexibility. It's generally a good idea to try out code like this before posting it as an answer. The dateString variable receives the string representation of date and time15/1/2023 10:12:12, with the format of dd/M/yyyy hh:mm:ss. @geoff: Depends on what you're looking for. Is there any particular reason to only include 3 out of the 6 trigonometry functions? This website or its third-party tools use cookies, which are necessary to its functioning and required to achieve the purposes illustrated in the cookie policy. Check out, 10 Things You Should Avoid in Your ASP.NET Core Controllers. there is no options for seanceInfo.theatre[i].seances[0] like Select or any LINQ expression. How can I calculate the volume of spatial geometry? ToList() doesn't seem to be avail anymore? Click box. Which is why it will not work on null - which is a null reference. In C# object is the root class and it is represented with the block of memory that has been used for allocating the user datas and configured to the other default keywords and functions that can be associated with the classes if we want to convert object to string types by using the default method like Object.toString() mainly it converts the object to its string representations so that it is used for validating the user inputs the object will be created with the help of constructor it may be derived or parent classes the object is to be created by using Object.toString() method it returns the string as the result. Frozen core Stability Calculations in G09? No, you can't cast without going around corners (this is: reflection), generic type parameters have to be known at compile time. Find centralized, trusted content and collaborate around the technologies you use most. Why Convert.ToString() can convert all type but another can't ? var stringlist = intlist.Select (x=>""+x).ToList (); Or also: var stringlist = intlist.Select (x=>$" {x}").ToList (); And finally the traditional: Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing. You need to add the items to your List. The DateTime.TryParseExact() method works like the DateTime.TryParse() method, but the format of the string representation must match the specified format exactly like the DateTime.ParseExact() method. If possible, can you create a simple sample (with some test data) to reproduce the problem and tell us what result you want to get, then it might easier for us to help you fix the problem. Right-click one of the captions and select Replace Smart Shape. Connect and share knowledge within a single location that is structured and easy to search. Ok, I'm calling your bluff. But wherever we need to convert the types we use some default methods like ToString(), arrays, etc. THANKS! To learn more, see our tips on writing great answers. Connect and share knowledge within a single location that is structured and easy to search. How can I calculate the volume of spatial geometry? Otherwise, it will return false with the minimum DateTime value: Considering the current culture is en-US, the TryParse() method returns true and the parsedDate variable stores the DateTime1/15/2023 12:00:00 AM. How to describe a scene that a small creature chop a large creature's head off?