mongodb c# driver(驱动)介绍
目前基于C#的mongodb驱动有两种,分别是官方驱动(下载地址)和samus驱动(下载地址)。
本次我们只演示官方驱动的使用方法。
官方驱动文档查看
第一步:引用驱动dll
引用驱动有两种方式:
1. 根据上面的下载地址下载对应的版本,然后引用到项目中。
2. 在项目的引用上右击->管理NuGet程序包(首先确保安装了nuget扩展包)->联机搜索官方驱动dll(搜索条件是 “Official MongoDB”)->安装成功后会引用3个dll(MongoDB.Driver和MongoDB.Bson,Newtonsoft.Json)。
第二步:构造MongodbHelper类
代码如下:
using MongoDB.Driver;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Server.DAL.DBHelper
{
public sealed class MongodbHelper
{
static public readonly MongodbHelper Instance = new MongodbHelper();
private MongoDatabase db;
private MongodbHelper()
{
//http://www.studyofnet.com/news/337.html
//mongodb://[username:[email protected]]host1[:port1][,host2[:port2],…[,hostN[:portN]]][/[database][?options]]
string strconn = "mongodb://sa:[email protected]:27017";
string dbName = "test";
MongoDB.Driver.MongoClient mongoClient = new MongoClient(strconn);
MongoServer server = mongoClient.GetServer();
db = server.GetDatabase(dbName);
}
public MongoDatabase DB
{
get { return db; }
}
public MongoCollection this[string value]
{
get
{
return db.GetCollection(value);
}
}
}
}
第三步:添加实体对象
在此建立的是一个复杂person对象,如下代码:
public class Test:BaseEntity
{
}
public class PersonType : BaseEntity
{
public string Code { get; set; }
public string Display { get; set; }
}
public class Person : BaseEntity
{
//如果对应多个分类,则格式为:,3,34,2
public string PersonType { get; set; }
public string Name { get; set; }
public bool Sex { get; set; }
public int Age { get; set; }
public DateTime AddTime { get; set; }
public List<Address> Addresses { get; set; }
public List<string> Courses { get; set; }
}
public class Address
{
public string Province { get; set; }
public string City { get; set; }
}
BaseEntity说明
BaseEntity中放的是mongodb数据库中自动生成的_id(类型是ObjectId)
public class BaseEntity
{
/// <summary>
/// 字段映射,告诉mongodb这个字段在数据库中对应_id
/// </summary>
[BsonId]
//告诉mongodb这个字段在数据库中的类型是ObjectId
[BsonRepresentation(BsonType.ObjectId)]
public string _id { get; set; }
}
第四步:创建ApiController
创建ApiController基类BaseApiController
BaseApiController中会初始化一些变量,代码如下:
public class BaseApiController : ApiController
{
public int skip, take;
public MongoDatabase db;
public MongoCollection col = null;//用于直接返回查询的json
public BaseApiController(string collectionName)
{
skip = GetIntRequest("skip");
take = GetIntRequest("take");
if (skip == 0 && take == 0)
{
take = int.MaxValue;
}
db = Server.DAL.DBHelper.MongodbHelper.Instance.DB;
col = db.GetCollection(collectionName);
}
public string GetStringRequest(string paramter)
{
return HttpContext.Current.Request.QueryString[paramter] ?? "";
}
public int GetIntRequest(string paramter)
{
string tmp = HttpContext.Current.Request.QueryString[paramter] ?? "";
int tag = 0;
int.TryParse(tmp, out tag);
return tag;
}
}
创建TestController继承BaseApiController
我们就用TestController来演示CURD.
具体代码如下,不再做详细说明:
public class TestController : Filter.BaseApiController
{
public TestController()
: base("Person")
{
}
public string Post([FromBody]object value)
{
var model = JsonConvert.DeserializeObject<Person>(value.ToString());
model._id = ObjectId.GenerateNewId().ToString();
try
{
col.Insert(model);
return model._id;
}
catch (WebException ex)
{
throw ex;
}
}
public object Get()
{
try
{
IEnumerable<Person> queryable = col.AsQueryable<Person>();
Func<Person, bool> where = null;
//有多少条件并多少条件
//like
//var name = GetStringRequest("Name");
if (!string.IsNullOrEmpty(name))
{
where = c => c.Name.Contains(name);
queryable = queryable.Where(where);
}
//单个条件等值查询
var personType = GetStringRequest("personType");
if (!string.IsNullOrEmpty(personType))
{
where = c => c.PersonType == personType;
queryable = queryable.Where(where);
}
//嵌套数组查询
var course = GetStringRequest("course");
if (!string.IsNullOrEmpty(course))
{
where = c => c.Courses.Contains(course);
queryable = queryable.Where(where);
}
//嵌套实体集合查询---查数量
var address = GetStringRequest("address");
if (!string.IsNullOrEmpty(address))
{
where = c => c.Addresses.Count > GetIntRequest("address");
queryable = queryable.Where(where);
}
var personList = queryable.OrderByDescending(c => c._id).Skip(skip).Take(take).ToList();
var count = queryable.Count();
var data = new { count = count, dataList = personList };
return data;
}
catch (WebException ex)
{
throw ex;
}
}
public Person Get(string id)
{
try
{
var model = col.AsQueryable<Person>().FirstOrDefault(c => c._id == id);
return model;
}
catch (WebException ex)
{
throw ex;
}
}
//部分字段修改模式,只修改需要修改的字段。缺点是只能修改单个属性,对于嵌套数组和嵌套实体集合无法修改
public int Put(string id, [FromBody]object value)
{
try
{
var query = new QueryDocument { { "_id", ObjectId.Parse(id) } };
var dicData = JsonConvert.DeserializeObject<Dictionary<string, object>>(value.ToString());
var update = new UpdateDocument { { "$set", new QueryDocument(dicData) } };
col.Update(query, update);
return 1;
}
catch (WebException ex)
{
throw ex;
}
}
//完全修改模式,先查后改,支持任意类型的对象的修改。缺点是需要先查询一次
public int Put([FromBody]object value)
{
try
{
var model = JsonConvert.DeserializeObject<Person>(value.ToString());
col.Save(model);
return 1;
}
catch (WebException ex)
{
throw ex;
}
}
public void Delete(string id)
{
try
{
var query = new QueryDocument { { "_id", ObjectId.Parse(id) } };
col.Remove(query);
}
catch (WebException ex)
{
throw ex;
}
}
}
第五步:CURD演示
在这里我们使用一个工具Fiddler2演示。
添加
*:first-child {
margin-top: 0 !important;
}
body>*:last-child {
margin-bottom: 0 !important;
}
/* BLOCKS
=============================================================================*/
p, blockquote, ul, ol, dl, table, pre {
margin: 15px 0;
}
/* HEADERS
=============================================================================*/
h1, h2, h3, h4, h5, h6 {
margin: 20px 0 10px;
padding: 0;
font-weight: bold;
-webkit-font-smoothing: antialiased;
}
h1 tt, h1 code, h2 tt, h2 code, h3 tt, h3 code, h4 tt, h4 code, h5 tt, h5 code, h6 tt, h6 code {
font-size: inherit;
}
h1 {
font-size: 28px;
color: #000;
}
h2 {
font-size: 24px;
border-bottom: 1px solid #ccc;
color: #000;
}
h3 {
font-size: 18px;
}
h4 {
font-size: 16px;
}
h5 {
font-size: 14px;
}
h6 {
color: #777;
font-size: 14px;
}
body>h2:first-child, body>h1:first-child, body>h1:first-child+h2, body>h3:first-child, body>h4:first-child, body>h5:first-child, body>h6:first-child {
margin-top: 0;
padding-top: 0;
}
a:first-child h1, a:first-child h2, a:first-child h3, a:first-child h4, a:first-child h5, a:first-child h6 {
margin-top: 0;
padding-top: 0;
}
h1+p, h2+p, h3+p, h4+p, h5+p, h6+p {
margin-top: 10px;
}
/* LINKS
=============================================================================*/
a {
color: #4183C4;
text-decoration: none;
}
a:hover {
text-decoration: underline;
}
/* LISTS
=============================================================================*/
ul, ol {
padding-left: 30px;
}
ul li > :first-child,
ol li > :first-child,
ul li ul:first-of-type,
ol li ol:first-of-type,
ul li ol:first-of-type,
ol li ul:first-of-type {
margin-top: 0px;
}
ul ul, ul ol, ol ol, ol ul {
margin-bottom: 0;
}
dl {
padding: 0;
}
dl dt {
font-size: 14px;
font-weight: bold;
font-style: italic;
padding: 0;
margin: 15px 0 5px;
}
dl dt:first-child {
padding: 0;
}
dl dt>:first-child {
margin-top: 0px;
}
dl dt>:last-child {
margin-bottom: 0px;
}
dl dd {
margin: 0 0 15px;
padding: 0 15px;
}
dl dd>:first-child {
margin-top: 0px;
}
dl dd>:last-child {
margin-bottom: 0px;
}
/* CODE
=============================================================================*/
pre, code, tt {
font-size: 12px;
font-family: Consolas, "Liberation Mono", Courier, monospace;
}
code, tt {
margin: 0 0px;
padding: 0px 0px;
white-space: nowrap;
border: 1px solid #eaeaea;
background-color: #f8f8f8;
border-radius: 3px;
}
pre>code {
margin: 0;
padding: 0;
white-space: pre;
border: none;
background: transparent;
}
pre {
background-color: #f8f8f8;
border: 1px solid #ccc;
font-size: 13px;
line-height: 19px;
overflow: auto;
padding: 6px 10px;
border-radius: 3px;
}
pre code, pre tt {
background-color: transparent;
border: none;
}
kbd {
-moz-border-bottom-colors: none;
-moz-border-left-colors: none;
-moz-border-right-colors: none;
-moz-border-top-colors: none;
background-color: #DDDDDD;
background-image: linear-gradient(#F1F1F1, #DDDDDD);
background-repeat: repeat-x;
border-color: #DDDDDD #CCCCCC #CCCCCC #DDDDDD;
border-image: none;
border-radius: 2px 2px 2px 2px;
border-style: solid;
border-width: 1px;
font-family: "Helvetica Neue",Helvetica,Arial,sans-serif;
line-height: 10px;
padding: 1px 4px;
}
/* QUOTES
=============================================================================*/
blockquote {
border-left: 4px solid #DDD;
padding: 0 15px;
color: #777;
}
blockquote>:first-child {
margin-top: 0px;
}
blockquote>:last-child {
margin-bottom: 0px;
}
/* HORIZONTAL RULES
=============================================================================*/
hr {
clear: both;
margin: 15px 0;
height: 0px;
overflow: hidden;
border: none;
background: transparent;
border-bottom: 4px solid #ddd;
padding: 0;
}
/* TABLES
=============================================================================*/
table th {
font-weight: bold;
}
table th, table td {
border: 1px solid #ccc;
padding: 6px 13px;
}
table tr {
border-top: 1px solid #ccc;
background-color: #fff;
}
table tr:nth-child(2n) {
background-color: #f8f8f8;
}
/* IMAGES
=============================================================================*/
img {
max-width: 100%
}
-->