search
HomeBackend DevelopmentC#.Net TutorialASP.NET adds data instance to database

Use Sql Server to create a database hovertree

Then use the following script to create the table hovertree_usermessage

USE [hovertree]
GO
/****** Object: Table [dbo].[hovertree_usermessage] ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[hovertree_usermessage](
[hvtId] [int] IDENTITY(1,1) NOT NULL,
[hvtTitle] [nvarchar](500) NULL,
[hvtContent] [nvarchar](max) NULL,
[hvtUser] [nvarchar](50) NULL,
[hvtTime] [datetime] NULL,
[hvtReply] [nvarchar](max) NULL,
[hvtIsShow] [bit] NULL,
CONSTRAINT [PK_hovertree_usermessage] PRIMARY KEY CLUSTERED 
(
[hvtId] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
ALTER TABLE [dbo].[hovertree_usermessage] ADD CONSTRAINT [DF_hovertree_usermessage_hvtTime] DEFAULT (getdate()) FOR [hvtTime]
GO

Then the C# code for using the KeleyiSQLHelper class to add data to the database is:

C# code

string m_sql="insert into hovertree_usermessage (hvtTitle,hvtContent,hvtUser)values("  
+SQLTools.GetQuotes(txtTitle.Text)+","   
+ SQLTools.GetQuotes(txtContent.Text)+","   
+SQLTools.GetQuotes(txtUser.Text) +")";  
KeleyiSQLHelper.ExecuteSql(m_sql);

where txtTitle, txtContent, and txtUser are ASP.NET TextBox control

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
The C# .NET Advantage: Features, Benefits, and Use CasesThe C# .NET Advantage: Features, Benefits, and Use CasesMay 05, 2025 am 12:01 AM

The advantages of C#.NET include: 1) Language features, such as asynchronous programming simplifies development; 2) Performance and reliability, improving efficiency through JIT compilation and garbage collection mechanisms; 3) Cross-platform support, .NETCore expands application scenarios; 4) A wide range of practical applications, with outstanding performance from the Web to desktop and game development.

Is C# Always Associated with .NET? Exploring AlternativesIs C# Always Associated with .NET? Exploring AlternativesMay 04, 2025 am 12:06 AM

C# is not always tied to .NET. 1) C# can run in the Mono runtime environment and is suitable for Linux and macOS. 2) In the Unity game engine, C# is used for scripting and does not rely on the .NET framework. 3) C# can also be used for embedded system development, such as .NETMicroFramework.

The .NET Ecosystem: C#'s Role and BeyondThe .NET Ecosystem: C#'s Role and BeyondMay 03, 2025 am 12:04 AM

C# plays a core role in the .NET ecosystem and is the preferred language for developers. 1) C# provides efficient and easy-to-use programming methods, combining the advantages of C, C and Java. 2) Execute through .NET runtime (CLR) to ensure efficient cross-platform operation. 3) C# supports basic to advanced usage, such as LINQ and asynchronous programming. 4) Optimization and best practices include using StringBuilder and asynchronous programming to improve performance and maintainability.

C# as a .NET Language: The Foundation of the EcosystemC# as a .NET Language: The Foundation of the EcosystemMay 02, 2025 am 12:01 AM

C# is a programming language released by Microsoft in 2000, aiming to combine the power of C and the simplicity of Java. 1.C# is a type-safe, object-oriented programming language that supports encapsulation, inheritance and polymorphism. 2. The compilation process of C# converts the code into an intermediate language (IL), and then compiles it into machine code execution in the .NET runtime environment (CLR). 3. The basic usage of C# includes variable declarations, control flows and function definitions, while advanced usages cover asynchronous programming, LINQ and delegates, etc. 4. Common errors include type mismatch and null reference exceptions, which can be debugged through debugger, exception handling and logging. 5. Performance optimization suggestions include the use of LINQ, asynchronous programming, and improving code readability.

C# vs. .NET: Clarifying the Key Differences and SimilaritiesC# vs. .NET: Clarifying the Key Differences and SimilaritiesMay 01, 2025 am 12:12 AM

C# is a programming language, while .NET is a software framework. 1.C# is developed by Microsoft and is suitable for multi-platform development. 2..NET provides class libraries and runtime environments, and supports multilingual. The two work together to build modern applications.

Beyond the Hype: Assessing the Current Role of C# .NETBeyond the Hype: Assessing the Current Role of C# .NETApr 30, 2025 am 12:06 AM

C#.NET is a powerful development platform that combines the advantages of the C# language and .NET framework. 1) It is widely used in enterprise applications, web development, game development and mobile application development. 2) C# code is compiled into an intermediate language and is executed by the .NET runtime environment, supporting garbage collection, type safety and LINQ queries. 3) Examples of usage include basic console output and advanced LINQ queries. 4) Common errors such as empty references and type conversion errors can be solved through debuggers and logging. 5) Performance optimization suggestions include asynchronous programming and optimization of LINQ queries. 6) Despite the competition, C#.NET maintains its important position through continuous innovation.

The Future of C# .NET: Trends and OpportunitiesThe Future of C# .NET: Trends and OpportunitiesApr 29, 2025 am 12:02 AM

The future trends of C#.NET are mainly focused on three aspects: cloud computing, microservices, AI and machine learning integration, and cross-platform development. 1) Cloud computing and microservices: C#.NET optimizes cloud environment performance through the Azure platform and supports the construction of an efficient microservice architecture. 2) Integration of AI and machine learning: With the help of the ML.NET library, C# developers can embed machine learning models in their applications to promote the development of intelligent applications. 3) Cross-platform development: Through .NETCore and .NET5, C# applications can run on Windows, Linux and macOS, expanding the deployment scope.

C# .NET Development Today: Trends and Best PracticesC# .NET Development Today: Trends and Best PracticesApr 28, 2025 am 12:25 AM

The latest developments and best practices in C#.NET development include: 1. Asynchronous programming improves application responsiveness, and simplifies non-blocking code using async and await keywords; 2. LINQ provides powerful query functions, efficiently manipulating data through delayed execution and expression trees; 3. Performance optimization suggestions include using asynchronous programming, optimizing LINQ queries, rationally managing memory, improving code readability and maintenance, and writing unit tests.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Dreamweaver Mac version

Dreamweaver Mac version

Visual web development tools

PhpStorm Mac version

PhpStorm Mac version

The latest (2018.2.1) professional PHP integrated development tool

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

Atom editor mac version download

Atom editor mac version download

The most popular open source editor

Safe Exam Browser

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.