C# offers a variety of object type conversion methods: direct conversion, "AS" operator and Tostring () method.
Direct conversion
Direct conversion, grammar is (string) O, and try to convert the object to a specified type. If the conversion is successful, the new value will be assigned to the variable; otherwise, the INVALIDCASTTEXCEPTION will be thrown out. This method is usually used for developers to confirm the conversion scenarios of object types.
"AS" operator
AS "operator, writing o as string, try to convert the object into a specified type. Unlike direct conversion, if the conversion fails, it returns NULL. This computing symbol is often used for developers uncertain object types or expected NULL values.
Tostring () method is not a type conversion operation, but the string representation of the object that can be used to obtain the object. This method is usually used to indicate the form of the object string to represent the form, regardless of its type.
Suggestion
For most conversion, direct conversion is the first choice, because it has the least ambiguity and higher performance. However, when the NULL value is expected to be eliminated, the "AS" operator is more suitable. The Tostring () method should be retained in the scenario that requires the form of the object string, regardless of its type.
The above is the detailed content of How to Choose the Best Casting Method in C#?. For more information, please follow other related articles on the PHP Chinese website!
Mastering Polymorphism in C : A Deep DiveMay 14, 2025 am 12:13 AMMastering polymorphisms in C can significantly improve code flexibility and maintainability. 1) Polymorphism allows different types of objects to be treated as objects of the same base type. 2) Implement runtime polymorphism through inheritance and virtual functions. 3) Polymorphism supports code extension without modifying existing classes. 4) Using CRTP to implement compile-time polymorphism can improve performance. 5) Smart pointers help resource management. 6) The base class should have a virtual destructor. 7) Performance optimization requires code analysis first.
C Destructors vs Garbage Collectors : What are the differences?May 13, 2025 pm 03:25 PMC destructorsprovideprecisecontroloverresourcemanagement,whilegarbagecollectorsautomatememorymanagementbutintroduceunpredictability.C destructors:1)Allowcustomcleanupactionswhenobjectsaredestroyed,2)Releaseresourcesimmediatelywhenobjectsgooutofscop
C and XML: Integrating Data in Your ProjectsMay 10, 2025 am 12:18 AMIntegrating XML in a C project can be achieved through the following steps: 1) parse and generate XML files using pugixml or TinyXML library, 2) select DOM or SAX methods for parsing, 3) handle nested nodes and multi-level properties, 4) optimize performance using debugging techniques and best practices.
Using XML in C : A Guide to Libraries and ToolsMay 09, 2025 am 12:16 AMXML is used in C because it provides a convenient way to structure data, especially in configuration files, data storage and network communications. 1) Select the appropriate library, such as TinyXML, pugixml, RapidXML, and decide according to project needs. 2) Understand two ways of XML parsing and generation: DOM is suitable for frequent access and modification, and SAX is suitable for large files or streaming data. 3) When optimizing performance, TinyXML is suitable for small files, pugixml performs well in memory and speed, and RapidXML is excellent in processing large files.
C# and C : Exploring the Different ParadigmsMay 08, 2025 am 12:06 AMThe main differences between C# and C are memory management, polymorphism implementation and performance optimization. 1) C# uses a garbage collector to automatically manage memory, while C needs to be managed manually. 2) C# realizes polymorphism through interfaces and virtual methods, and C uses virtual functions and pure virtual functions. 3) The performance optimization of C# depends on structure and parallel programming, while C is implemented through inline functions and multithreading.
C XML Parsing: Techniques and Best PracticesMay 07, 2025 am 12:06 AMThe DOM and SAX methods can be used to parse XML data in C. 1) DOM parsing loads XML into memory, suitable for small files, but may take up a lot of memory. 2) SAX parsing is event-driven and is suitable for large files, but cannot be accessed randomly. Choosing the right method and optimizing the code can improve efficiency.
C in Specific Domains: Exploring Its StrongholdsMay 06, 2025 am 12:08 AMC is widely used in the fields of game development, embedded systems, financial transactions and scientific computing, due to its high performance and flexibility. 1) In game development, C is used for efficient graphics rendering and real-time computing. 2) In embedded systems, C's memory management and hardware control capabilities make it the first choice. 3) In the field of financial transactions, C's high performance meets the needs of real-time computing. 4) In scientific computing, C's efficient algorithm implementation and data processing capabilities are fully reflected.
Debunking the Myths: Is C Really a Dead Language?May 05, 2025 am 12:11 AMC is not dead, but has flourished in many key areas: 1) game development, 2) system programming, 3) high-performance computing, 4) browsers and network applications, C is still the mainstream choice, showing its strong vitality and application scenarios.
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.
VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft
MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.
SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.
SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.
