c# 链接mongDB集群 一 了解mongdb 二 部署集群 三 C#链接mongdb 完成测试 C#链接mongdb 完成测试 此章节继续我们上一章节将的我们开始用程序去链接mondbdb,大家都知道我们链接sqlserver其实用的是微软自己写的驱动。它已经封装了一些对象,要我们去链接。但
c# 链接mongDB集群
一 了解mongdb
二 部署集群
三 C#链接mongdb 完成测试
C#链接mongdb 完成测试
此章节继续我们上一章节将的我们开始用程序去链接mondbdb,大家都知道我们链接sqlserver其实用的是微软自己写的驱动。它已经封装了一些对象,要我们去链接。但是我们链接mondbdb 同样需要一些对象,这个mongdb官网有说明,可以自己去看看或者直接下载我的这里下载 或者在第一章节有些伙伴们已经下载好了
开发驱动文件夹 在 mongo-csharp-driver-master\mongo-csharp-driver-master\src SRC下面看到驱动项目这里注意,我下载是vs2012的项目,同学们可以根据自己的需要替换net framework 版本
打开项目之后看到 如图所示
编译项目得到
MongoDB.Bson.dll
MongoDB.Driver.dll
创建项目,项目配置文件如下
<?xml version="1.0" encoding="utf-8" ?> <configuration> <startup> <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" /> </startup> <appSettings> <add key="LogLevel" value="trace" /> <add key="LogPath" value="E:\Tools\mongdb\FrmMongDB\FrmMongDB\logs" /> <!--MongDb配置begin--> <add key="MongReplicaSetName" value="zuomm"/><!--设置副本集名称--> <add key="MongoServerAddress" value="127.0.0.1:1111|127.0.0.1:2222|127.0.0.1:3333"/><!--mongdb集群列表--> <add key="TimeOut" value="60"/><!--mongdb集群链接超时时间--> <!--MongDb配置end--> </appSettings> </configuration>
LogLevel 为自定义 日记级别 ,这个后面看我的代码
LogPath 为日志路径
MongReplicaSetName 为副本集名称,其实就是建立集群的时候取的名字。
MongoServerAddress 为集群机器ip列表,我这里是自己的机器开了不同的端口来区别,你可以改成局域网ip
TimeOut 超时时间,默认貌似是3秒,我这里设置60秒方便调试
链接集群主要代码
/// <summary> /// 取得数据库连接字符串 /// </summary> /// <param name="connName">App.Config文件中AppSettings节中 AppSettings 对应的name</param> /// <returns>数据库连接字符串</returns> private static MongoServer GetConnStr() { List<MongoServerAddress> servers = new List<MongoServerAddress>(); string reg = @"^(?'server'\d{1,}.\d{1,}.\d{1,}.\d{1,}):(?'port'\d{1,})$"; string[] ServerList = ConfigurationManager.AppSettings["MongoServerAddress"].Trim().Split('|'); foreach (string server in ServerList) { MatchCollection mc = Regex.Matches(server, reg); if (mc != null && mc.Count > 0) servers.Add(new MongoServerAddress(mc[0].Groups["server"].ToString(), Convert.ToInt32(mc[0].Groups["port"].ToString()))); } if (servers == null || servers.Count < 1) return null; MongoClientSettings set = new MongoClientSettings(); set.Servers = servers; set.ReplicaSetName = ConfigurationManager.AppSettings["MongReplicaSetName"].Trim();//设置副本集名称 int TimeOut =ConvertUtil.ParseInt(ConfigurationManager.AppSettings["TimeOut"].Trim());//设置副本集名称 set.ConnectTimeout = new TimeSpan(0, 0, 0, TimeOut, 0);//设置超时时间为5秒 set.ReadPreference = new ReadPreference(ReadPreferenceMode.SecondaryPreferred); MongoClient client = new MongoClient(set); return client.GetServer(); } set.ReadPreference = new ReadPreference(ReadPreferenceMode.SecondaryPreferred); 这句代码可以根据自己需要修改。
其他没有什么注意的地方
数据插入mongdb代码
/// <summary> /// MongDB 批量insert语句 /// </summary> /// <typeparam name="T">对象类型</typeparam> /// <param name="_databaseName">数据库名称</param> /// <param name="_collectionName">表名称</param> /// <param name="entitys">对象</param> /// <param name="errorMsg">返回错误</param> /// <returns></returns> public static IEnumerable<SafeModeResult> Execute<T>(string _databaseName, string _collectionName, IEnumerable<T> entitys, out string errorMsg) { errorMsg = string.Empty; //取得数据库连接 IEnumerable<SafeModeResult> result = null; try { if (null == entitys) return null; //获取连接的服务器集群 _server = GetConnStr(); //获取数据库或者创建数据库(不存在的话)。 MongoDatabase database = _server.GetDatabase(_databaseName); using (_server.RequestStart(database))//开始连接数据库。 { MongoCollection<T> myCollection = database.GetCollection<T>(_collectionName); result = myCollection.InsertBatch<T>(entitys); } } catch (Exception ex) { errorMsg = ex.ToString(); } finally { } //记录日志 if (!string.IsNullOrEmpty(errorMsg)) { LogUtil.Error("CommonLib.DbAccess.MongDBAccess", "Execute", errorMsg + "\n\r\t"); } return result; }
读取mongdb数据代码
/// <summary> /// 如果不清楚具体的数量,一般不要用这个函数。 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="collectionName"></param> /// <returns></returns> public static List<T> GetAll<T>(string _databaseName, string collectionName,out string errorMsg) { errorMsg = string.Empty; List<T> result = new List<T>(); try { //获取连接的服务器集群 _server = GetConnStr(); //获取数据库或者创建数据库(不存在的话)。 MongoDatabase database = _server.GetDatabase(_databaseName); using (_server.RequestStart(database))//开始连接数据库。 { MongoCollection<T> myCollection = database.GetCollection<T>(collectionName); result.AddRange(myCollection.FindAll()); } } catch (Exception ex ) { errorMsg = ex.ToString(); } //记录日志 if (!string.IsNullOrEmpty(errorMsg)) { LogUtil.Error("CommonLib.DbAccess.MongDBAccess", "GetAll", errorMsg + "\n\r\t"); } return result; }
以上是插入和读取代码。
后面运行效果如下
我这里插入了10w条数据 人然后读取10w条数据。效率比sqlserver是快很多。

InnoDBBufferPool reduces disk I/O by caching data and indexing pages, improving database performance. Its working principle includes: 1. Data reading: Read data from BufferPool; 2. Data writing: After modifying the data, write to BufferPool and refresh it to disk regularly; 3. Cache management: Use the LRU algorithm to manage cache pages; 4. Reading mechanism: Load adjacent data pages in advance. By sizing the BufferPool and using multiple instances, database performance can be optimized.

Compared with other programming languages, MySQL is mainly used to store and manage data, while other languages such as Python, Java, and C are used for logical processing and application development. MySQL is known for its high performance, scalability and cross-platform support, suitable for data management needs, while other languages have advantages in their respective fields such as data analytics, enterprise applications, and system programming.

MySQL is worth learning because it is a powerful open source database management system suitable for data storage, management and analysis. 1) MySQL is a relational database that uses SQL to operate data and is suitable for structured data management. 2) The SQL language is the key to interacting with MySQL and supports CRUD operations. 3) The working principle of MySQL includes client/server architecture, storage engine and query optimizer. 4) Basic usage includes creating databases and tables, and advanced usage involves joining tables using JOIN. 5) Common errors include syntax errors and permission issues, and debugging skills include checking syntax and using EXPLAIN commands. 6) Performance optimization involves the use of indexes, optimization of SQL statements and regular maintenance of databases.

MySQL is suitable for beginners to learn database skills. 1. Install MySQL server and client tools. 2. Understand basic SQL queries, such as SELECT. 3. Master data operations: create tables, insert, update, and delete data. 4. Learn advanced skills: subquery and window functions. 5. Debugging and optimization: Check syntax, use indexes, avoid SELECT*, and use LIMIT.

MySQL efficiently manages structured data through table structure and SQL query, and implements inter-table relationships through foreign keys. 1. Define the data format and type when creating a table. 2. Use foreign keys to establish relationships between tables. 3. Improve performance through indexing and query optimization. 4. Regularly backup and monitor databases to ensure data security and performance optimization.

MySQL is an open source relational database management system that is widely used in Web development. Its key features include: 1. Supports multiple storage engines, such as InnoDB and MyISAM, suitable for different scenarios; 2. Provides master-slave replication functions to facilitate load balancing and data backup; 3. Improve query efficiency through query optimization and index use.

SQL is used to interact with MySQL database to realize data addition, deletion, modification, inspection and database design. 1) SQL performs data operations through SELECT, INSERT, UPDATE, DELETE statements; 2) Use CREATE, ALTER, DROP statements for database design and management; 3) Complex queries and data analysis are implemented through SQL to improve business decision-making efficiency.

The basic operations of MySQL include creating databases, tables, and using SQL to perform CRUD operations on data. 1. Create a database: CREATEDATABASEmy_first_db; 2. Create a table: CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY, titleVARCHAR(100)NOTNULL, authorVARCHAR(100)NOTNULL, published_yearINT); 3. Insert data: INSERTINTObooks(title, author, published_year)VA


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