ChenYan | 登山亦有道

Panmen Park on September 3

Original link: https://chenyan98.cn/3716.html I went to Panmen once before, and it was during the day. At that time, I also took photos and wrote an article. Recently, I saw a Mid-Autumn Lantern Festival while I was on Douyin. I watched a few videos and felt pretty good, so I decided to go. It seems that …

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Ordinary but shining August

Original link: https://chenyan98.cn/3661.html August (August) is the eighth month of the Gregorian calendar year, is a big month, a total of 31 days. In the Northern Hemisphere, August is the third month of summer. The solar terms are: the beginning of autumn and the end of summer. In China, August 1st is Army Day. The …

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Lecture 09: Various Practical Applications of Inheritance in .NET and Analysis of Polymorphism Principles

Original link: https://chenyan98.cn/3656.html 1. The concept of inheritance basic inheritance: understand inheritance from real life, say that inheritance in our life is mainly property, inheritance in our program is mainly code (attributes, methods) By creating a windows form program, observe two Forms, we can find that they all inherit from Form A: What are the …

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Lecture 08: Six principles of object-oriented programming to help you write elegant programs

Original link: https://chenyan98.cn/3182.html Designing a class is to complete the design of properties and methods! Attribute: What data the class needs to encapsulate! Method: What functions (tasks) the class should implement! Considering that everyone’s thinking angle is different, the methods used are different, and the attributes and methods of the final design are also different. …

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Lecture 03: [Enhanced] WinForm entry and enterprise project standard UI design

Original link: https://chenyan98.cn/3639.html Q1: CLR CLS CTS relationship is unclear (CLR=CLS+CTS) A: The above three contents are actually different program “modules”. It is like the several modules of the computer we are talking about: CPU, memory, hard disk, motherboard. CLR: The common language runtime (virtual machine) is mainly used to compile the code we write …

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Lecture 02: [Review] C programming core syntax summary enhancement and common problem analysis

Original link: https://chenyan98.cn/3643.html 1. About variables [1] Variable types: Local variables (variables used inside a method can only be used by the method itself) (destructed when the method is executed) Member variables (defined outside the method and inside the class, you can Used by other methods inside the class) Destroy global variables (usually public static …

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Lecture 01: [Review] Various techniques and common problems of using the VS development environment

Original link: https://chenyan98.cn/3635.html VS version recommendation: (2019, 2022) Database version recommendation: SQLServer2012 Project type: (console –> mainly for learning; form programs (windows, c/s, desktop applications), web programs, web service programs) Project Composition: [1] Solution: It is mainly used to manage various projects we add. All projects within the solution can be compiled uniformly. Develop a …

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Lecture 01: [Review] Various techniques and common problems of using the VS development environment

Original link: https://chenyan98.cn/3635.html VS version recommendation: (2019, 2022) Database version recommendation: SQLServer2012 Project type: (console –> mainly for learning; form programs (windows, c/s, desktop applications), web programs, web service programs) Project Composition: [1] Solution: It is mainly used to manage various projects we add. All projects within the solution can be compiled uniformly. Develop a …

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my one july and august and a half

Original link: https://chenyan98.cn/3573.html July is the seventh month of the Gregorian calendar year and is a big month with 31 days in total. In the Northern Hemisphere, July is the second month of summer. Solar terms: small heat, big heat. July 1 of the Gregorian calendar is the founding day of the party, the seventh …

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SQL Server basic data query

Original link: https://chenyan98.cn/3548.html Recently, I finally had time to restart my C# learning. After reading a practical project, I found that my knowledge of SQL Server was not very solid, so I found a specific chapter of the course for a special study. In addition to learning basic data query about SQL Server, Also have …

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long and full June

Original link: https://chenyan98.cn/3484.html Today, July 7th, the blog has lost a lot of passion, but it will continue to be updated, but the frequency will not be very high. Some major events will be specially written, and smaller things will be like now, and will be organized in January. It is mainly in the form …

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Where to go (mid-year summary)

Original link: https://chenyan98.cn/3477.html Work, study, and life constitute a person’s life. They need to be thought about and planned in advance. If you think too much, you will be tiring, but if you don’t want to, you will be more tired one day. In terms of work, I have been very busy for the past …

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