業精於勤,荒於嬉;行成於思,毀於隨。
我們可以結合相關的IDE做一個簡單的增刪改查了,實現MongoDB在專案中的初步應用。
前提是安裝了MongoDB服務和MongoDB視覺化工具,沒有安裝的可以點下面的路徑去操作一下。
第一步:NoSql非關係型資料庫之MongoDB應用(一):安裝MongoDB服務
第二步:NoSql非關係型資料庫之MongoDB應用(二):安裝MongoDB視覺化工具
注:文件末尾附原始碼
1、建立專案
演示操作環境(其他環境也可以):
開發環境:Windows 10 專業版
系統型別:64 位作業系統, 基於 x64 的處理器
IDE:Visual Studio 2019 Community
資料庫:MongoDB
建立一個專案名為MongoDBTest的Web API,net或者net core都可以,我這裡以net core為例
2、在NuGet引用MongoDB動態連結庫
需要在專案中引用 MongoDB.Bson 和 MongoDB.Driver 注意是2.10.4版本的。
MongoDB.Bson是什麼
BSON是一種類json的一種二進位制形式的儲存格式,簡稱Binary JSON,它和JSON一樣,支援內嵌的文件物件和陣列物件,但是BSON有JSON沒有的一些資料型別,如Date和BinData型別。
BSON可以做為網路資料交換的一種儲存形式,這個有點類似於Google的Protocol Buffer,但是BSON是一種schema-less的儲存形式,它的優點是靈活性高,但它的缺點是空間利用率不是很理想,
BSON有三個特點:輕量性、可遍歷性、高效性
{“hello":"world"} 這是一個BSON的例子,其中"hello"是key name,它一般是cstring型別,位元組表示是cstring::= (byte*) "/x00" ,其中*表示零個或多個byte位元組,/x00表示結束符;後面的"world"是value值,它的型別一般是string,double,array,binarydata等型別。
MongoDB.Bson在MongoDB中的使用
MongoDB使用了BSON這種結構來儲存資料和網路資料交換。把這種格式轉化成一文件這個概念(Document),因為BSON是schema-free的,
所以在MongoDB中所對應的文件也有這個特徵,這裡的一個Document也可以理解成關係資料庫中的一條記錄(Record),只是這裡的Document的變化更豐富一些,如Document可以巢狀。
MongoDB以BSON做為其儲存結構的一種重要原因是其可遍歷性。
MongoDB.Driver是什麼
顧名思義,MongoDB.Driver是官網推出的連線MongoDB的驅動包,我們連線MongoDB需要依賴這個連結庫。
2、建立MongoDB上下文連線工具類
引入 MongoDB.Bson 和 MongoDB.Driver包後就可以編寫幫助類了,幫助類太多,幫助類可以自己拓展需要的方法,不過這裡拓展的方法已經足夠使用了。
建立一個上下文資料夾DbContexts,建立DBFactory幫助類,新增Bson和Driver的using引用,內容如下(文件末尾附原始碼裡面有):


using MongoDB.Bson;
using MongoDB.Driver;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks; namespace MongoDBTest.DbContexts
{
/// <summary>
/// Date 2021-07-12
/// Author:xiongze
/// Describe:MongoDB工具類
/// </summary>
/// <typeparam name="T"></typeparam>
public static class MongodbClient<T> where T : class
{
#region +MongodbInfoClient 獲取mongodb例項
/// <summary>
/// 獲取mongodb例項
/// </summary>
/// <param name="host">連線字串,庫,表</param>
/// <returns></returns>
public static IMongoCollection<T> MongodbInfoClient(MongodbHost host)
{
var mongoSettings = MongoClientSettings.FromConnectionString(host.Connection);
mongoSettings.GuidRepresentation = GuidRepresentation.PythonLegacy;
MongoClient client = new MongoClient(mongoSettings);
var dataBase = client.GetDatabase(host.DataBase);
return dataBase.GetCollection<T>(host.Table);
}
#endregion
} public class MongodbHost
{
//public MongodbHost()
//{
// //Connection = CommonConfig.GetConnectionStrings().ConnectionStrings.MongoDBConnection;
// Connection =""; //這裡是獲取配置連線的mongodb連線,我這裡先不指定,各種指定寫法不一樣(net和netcore獲取不一樣)
// DataBase = new MongoUrl(Connection).DatabaseName;
//}
public MongodbHost(string connectionString)
{
Connection = connectionString;
DataBase = new MongoUrl(connectionString).DatabaseName;
}
/// <summary>
/// 連線字串
/// </summary>
public string Connection { get; set; }
/// <summary>
/// 庫
/// </summary>
public string DataBase { get; set; }
/// <summary>
/// 表
/// </summary>
public string Table { get; set; } } public static class TMongodbHelper<T> where T : class, new()
{
#region +Add 新增一條資料
/// <summary>
/// 新增一條資料
/// </summary>
/// <param name="t">新增的實體</param>
/// <param name="host">mongodb連線資訊</param>
/// <returns></returns>
public static int Add(MongodbHost host, T t)
{
try
{
var client = MongodbClient<T>.MongodbInfoClient(host);
client.InsertOne(t);
return 1;
}
catch
{
return 0;
}
}
#endregion #region +AddAsync 非同步新增一條資料
/// <summary>
/// 非同步新增一條資料
/// </summary>
/// <param name="t">新增的實體</param>
/// <param name="host">mongodb連線資訊</param>
/// <returns></returns>
public static async Task<int> AddAsync(MongodbHost host, T t)
{
try
{
var client = MongodbClient<T>.MongodbInfoClient(host);
await client.InsertOneAsync(t);
return 1;
}
catch
{
return 0;
}
}
#endregion #region +InsertMany 批量插入
/// <summary>
/// 批量插入
/// </summary>
/// <param name="host">mongodb連線資訊</param>
/// <param name="t">實體集合</param>
/// <returns></returns>
public static int InsertMany(MongodbHost host, List<T> t)
{
try
{
var client = MongodbClient<T>.MongodbInfoClient(host);
client.InsertMany(t);
return 1;
}
catch (Exception)
{
//throw ex;
return 0;
}
}
#endregion #region +InsertManyAsync 非同步批量插入
/// <summary>
/// 非同步批量插入
/// </summary>
/// <param name="host">mongodb連線資訊</param>
/// <param name="t">實體集合</param>
/// <returns></returns>
public static async Task<int> InsertManyAsync(MongodbHost host, List<T> t)
{
try
{
var client = MongodbClient<T>.MongodbInfoClient(host);
await client.InsertManyAsync(t);
return 1;
}
catch (Exception)
{
return 0;
}
} public static async Task<int> AsyncInsertManyMethod(MongodbHost mongodb, T log)
{
int i = await TMongodbHelper<T>.InsertManyAsync(mongodb, new List<T> { log });
return i;
}
#endregion #region +Update 修改一條資料
/// <summary>
/// 修改一條資料
/// </summary>
/// <param name="t">新增的實體</param>
/// <param name="host">mongodb連線資訊</param>
/// <returns></returns>
public static UpdateResult Update(MongodbHost host, T t, string id)
{
try
{
var client = MongodbClient<T>.MongodbInfoClient(host);
//修改條件
FilterDefinition<T> filter = Builders<T>.Filter.Eq("_id", new ObjectId(id));
//要修改的欄位
var list = new List<UpdateDefinition<T>>();
foreach (var item in t.GetType().GetProperties())
{
if (item.Name.ToLower() == "id") continue;
list.Add(Builders<T>.Update.Set(item.Name, item.GetValue(t)));
}
var updatefilter = Builders<T>.Update.Combine(list);
return client.UpdateOne(filter, updatefilter);
}
catch (Exception ex)
{
throw ex;
}
}
#endregion #region +UpdateAsync 非同步修改一條資料
/// <summary>
/// 非同步修改一條資料
/// </summary>
/// <param name="t">新增的實體</param>
/// <param name="host">mongodb連線資訊</param>
/// <returns></returns>
public static async Task<UpdateResult> UpdateAsync(MongodbHost host, T t, string id)
{
try
{
var client = MongodbClient<T>.MongodbInfoClient(host);
//修改條件
FilterDefinition<T> filter = Builders<T>.Filter.Eq("_id", new ObjectId(id));
//要修改的欄位
var list = new List<UpdateDefinition<T>>();
foreach (var item in t.GetType().GetProperties())
{
if (item.Name.ToLower() == "id") continue;
list.Add(Builders<T>.Update.Set(item.Name, item.GetValue(t)));
}
var updatefilter = Builders<T>.Update.Combine(list);
return await client.UpdateOneAsync(filter, updatefilter);
}
catch (Exception ex)
{
throw ex;
}
}
#endregion #region +UpdateManay 批量修改資料
/// <summary>
/// 批量修改資料
/// </summary>
/// <param name="dic">要修改的欄位</param>
/// <param name="host">mongodb連線資訊</param>
/// <param name="filter">修改條件</param>
/// <returns></returns>
public static UpdateResult UpdateManay(MongodbHost host, Dictionary<string, string> dic, FilterDefinition<T> filter)
{
try
{
var client = MongodbClient<T>.MongodbInfoClient(host);
T t = new T();
//要修改的欄位
var list = new List<UpdateDefinition<T>>();
foreach (var item in t.GetType().GetProperties())
{
if (!dic.ContainsKey(item.Name)) continue;
var value = dic[item.Name];
list.Add(Builders<T>.Update.Set(item.Name, value));
}
var updatefilter = Builders<T>.Update.Combine(list);
return client.UpdateMany(filter, updatefilter);
}
catch (Exception ex)
{
throw ex;
}
}
#endregion #region +UpdateManayAsync 非同步批量修改資料
/// <summary>
/// 非同步批量修改資料
/// </summary>
/// <param name="dic">要修改的欄位</param>
/// <param name="host">mongodb連線資訊</param>
/// <param name="filter">修改條件</param>
/// <returns></returns>
public static async Task<UpdateResult> UpdateManayAsync(MongodbHost host, Dictionary<string, string> dic, FilterDefinition<T> filter)
{
try
{
var client = MongodbClient<T>.MongodbInfoClient(host);
T t = new T();
//要修改的欄位
var list = new List<UpdateDefinition<T>>();
foreach (var item in t.GetType().GetProperties())
{
if (!dic.ContainsKey(item.Name)) continue;
var value = dic[item.Name];
list.Add(Builders<T>.Update.Set(item.Name, value));
}
var updatefilter = Builders<T>.Update.Combine(list);
return await client.UpdateManyAsync(filter, updatefilter);
}
catch (Exception ex)
{
throw ex;
}
}
#endregion #region Delete 刪除一條資料
/// <summary>
/// 刪除一條資料
/// </summary>
/// <param name="host">mongodb連線資訊</param>
/// <param name="id">objectId</param>
/// <returns></returns>
public static DeleteResult Delete(MongodbHost host, string id)
{
try
{
var client = MongodbClient<T>.MongodbInfoClient(host);
FilterDefinition<T> filter = Builders<T>.Filter.Eq("_id", new ObjectId(id));
return client.DeleteOne(filter);
}
catch (Exception ex)
{
throw ex;
} }
#endregion #region DeleteAsync 非同步刪除一條資料
/// <summary>
/// 非同步刪除一條資料
/// </summary>
/// <param name="host">mongodb連線資訊</param>
/// <param name="id">objectId</param>
/// <returns></returns>
public static async Task<DeleteResult> DeleteAsync(MongodbHost host, string id)
{
try
{
var client = MongodbClient<T>.MongodbInfoClient(host);
//修改條件
FilterDefinition<T> filter = Builders<T>.Filter.Eq("_id", new ObjectId(id));
return await client.DeleteOneAsync(filter);
}
catch (Exception ex)
{
throw ex;
} }
#endregion #region DeleteMany 刪除多條資料
/// <summary>
/// 刪除一條資料
/// </summary>
/// <param name="host">mongodb連線資訊</param>
/// <param name="filter">刪除的條件</param>
/// <returns></returns>
public static DeleteResult DeleteMany(MongodbHost host, FilterDefinition<T> filter)
{
try
{
var client = MongodbClient<T>.MongodbInfoClient(host);
return client.DeleteMany(filter);
}
catch (Exception ex)
{
throw ex;
} }
#endregion #region DeleteManyAsync 非同步刪除多條資料
/// <summary>
/// 非同步刪除多條資料
/// </summary>
/// <param name="host">mongodb連線資訊</param>
/// <param name="filter">刪除的條件</param>
/// <returns></returns>
public static async Task<DeleteResult> DeleteManyAsync(MongodbHost host, FilterDefinition<T> filter)
{
try
{
var client = MongodbClient<T>.MongodbInfoClient(host);
return await client.DeleteManyAsync(filter);
}
catch (Exception ex)
{
throw ex;
} }
#endregion #region Count 根據條件獲取總數
/// <summary>
/// 根據條件獲取總數
/// </summary>
/// <param name="host">mongodb連線資訊</param>
/// <param name="filter">條件</param>
/// <returns></returns>
public static long Count(MongodbHost host, FilterDefinition<T> filter)
{
try
{
var client = MongodbClient<T>.MongodbInfoClient(host);
return client.CountDocuments(filter);
}
catch (Exception ex)
{
throw ex;
}
}
#endregion #region CountAsync 非同步根據條件獲取總數
/// <summary>
/// 非同步根據條件獲取總數
/// </summary>
/// <param name="host">mongodb連線資訊</param>
/// <param name="filter">條件</param>
/// <returns></returns>
public static async Task<long> CountAsync(MongodbHost host, FilterDefinition<T> filter)
{
try
{
var client = MongodbClient<T>.MongodbInfoClient(host);
return await client.CountDocumentsAsync(filter);
}
catch (Exception ex)
{
throw ex;
}
}
#endregion #region FindOne 根據id查詢一條資料
/// <summary>
/// 根據id查詢一條資料
/// </summary>
/// <param name="host">mongodb連線資訊</param>
/// <param name="id">objectid</param>
/// <param name="field">要查詢的欄位,不寫時查詢全部</param>
/// <returns></returns>
public static T FindOne(MongodbHost host, string id, string[] field = null)
{
try
{
var client = MongodbClient<T>.MongodbInfoClient(host);
FilterDefinition<T> filter = Builders<T>.Filter.Eq("_id", new ObjectId(id));
//不指定查詢欄位
if (field == null || field.Length == 0)
{
return client.Find(filter).FirstOrDefault<T>();
} //制定查詢欄位
var fieldList = new List<ProjectionDefinition<T>>();
for (int i = 0; i < field.Length; i++)
{
fieldList.Add(Builders<T>.Projection.Include(field[i].ToString()));
}
var projection = Builders<T>.Projection.Combine(fieldList);
fieldList?.Clear();
return client.Find(filter).Project<T>(projection).FirstOrDefault<T>();
}
catch (Exception ex)
{
throw ex;
}
}
#endregion #region FindOneAsync 非同步根據id查詢一條資料
/// <summary>
/// 非同步根據id查詢一條資料
/// </summary>
/// <param name="host">mongodb連線資訊</param>
/// <param name="id">objectid</param>
/// <returns></returns>
public static async Task<T> FindOneAsync(MongodbHost host, string id, string[] field = null)
{
try
{
var client = MongodbClient<T>.MongodbInfoClient(host);
FilterDefinition<T> filter = Builders<T>.Filter.Eq("_id", new ObjectId(id));
//不指定查詢欄位
if (field == null || field.Length == 0)
{
return await client.Find(filter).FirstOrDefaultAsync();
} //制定查詢欄位
var fieldList = new List<ProjectionDefinition<T>>();
for (int i = 0; i < field.Length; i++)
{
fieldList.Add(Builders<T>.Projection.Include(field[i].ToString()));
}
var projection = Builders<T>.Projection.Combine(fieldList);
fieldList?.Clear();
return await client.Find(filter).Project<T>(projection).FirstOrDefaultAsync();
}
catch (Exception ex)
{
throw ex;
}
}
#endregion #region FindList 查詢集合
/// <summary>
/// 查詢集合
/// </summary>
/// <param name="host">mongodb連線資訊</param>
/// <param name="filter">查詢條件</param>
/// <param name="field">要查詢的欄位,不寫時查詢全部</param>
/// <param name="sort">要排序的欄位</param>
/// <returns></returns>
public static List<T> FindList(MongodbHost host, FilterDefinition<T> filter, string[] field = null, SortDefinition<T> sort = null)
{
try
{
var client = MongodbClient<T>.MongodbInfoClient(host);
//不指定查詢欄位
if (field == null || field.Length == 0)
{
if (sort == null) return client.Find(filter).ToList();
//進行排序
return client.Find(filter).Sort(sort).ToList();
} //制定查詢欄位
var fieldList = new List<ProjectionDefinition<T>>();
for (int i = 0; i < field.Length; i++)
{
fieldList.Add(Builders<T>.Projection.Include(field[i].ToString()));
}
var projection = Builders<T>.Projection.Combine(fieldList);
fieldList?.Clear();
if (sort == null) return client.Find(filter).Project<T>(projection).ToList();
//排序查詢
return client.Find(filter).Sort(sort).Project<T>(projection).ToList();
}
catch (Exception ex)
{
throw ex;
}
}
#endregion #region FindListAsync 非同步查詢集合
/// <summary>
/// 非同步查詢集合
/// </summary>
/// <param name="host">mongodb連線資訊</param>
/// <param name="filter">查詢條件</param>
/// <param name="field">要查詢的欄位,不寫時查詢全部</param>
/// <param name="sort">要排序的欄位</param>
/// <returns></returns>
public static async Task<List<T>> FindListAsync(MongodbHost host, FilterDefinition<T> filter, string[] field = null, SortDefinition<T> sort = null)
{
try
{
var client = MongodbClient<T>.MongodbInfoClient(host);
//不指定查詢欄位
if (field == null || field.Length == 0)
{
if (sort == null) return await client.Find(filter).ToListAsync();
return await client.Find(filter).Sort(sort).ToListAsync();
} //制定查詢欄位
var fieldList = new List<ProjectionDefinition<T>>();
for (int i = 0; i < field.Length; i++)
{
fieldList.Add(Builders<T>.Projection.Include(field[i].ToString()));
}
var projection = Builders<T>.Projection.Combine(fieldList);
fieldList?.Clear();
if (sort == null) return await client.Find(filter).Project<T>(projection).ToListAsync();
//排序查詢
return await client.Find(filter).Sort(sort).Project<T>(projection).ToListAsync();
}
catch (Exception ex)
{
throw ex;
}
}
#endregion #region FindListByPage 分頁查詢集合
/// <summary>
/// 分頁查詢集合
/// </summary>
/// <param name="host">mongodb連線資訊</param>
/// <param name="filter">查詢條件</param>
/// <param name="pageIndex">當前頁</param>
/// <param name="pageSize">頁容量</param>
/// <param name="count">總條數</param>
/// <param name="field">要查詢的欄位,不寫時查詢全部</param>
/// <param name="sort">要排序的欄位</param>
/// <returns></returns>
public static List<T> FindListByPage(MongodbHost host, FilterDefinition<T> filter, int pageIndex, int pageSize, out long count, string[] field = null, SortDefinition<T> sort = null)
{
try
{
var client = MongodbClient<T>.MongodbInfoClient(host);
count = client.CountDocuments(filter);
//不指定查詢欄位
if (field == null || field.Length == 0)
{
if (sort == null) return client.Find(filter).Skip((pageIndex - 1) * pageSize).Limit(pageSize).ToList();
//進行排序
return client.Find(filter).Sort(sort).Skip((pageIndex - 1) * pageSize).Limit(pageSize).ToList();
} //制定查詢欄位
var fieldList = new List<ProjectionDefinition<T>>();
for (int i = 0; i < field.Length; i++)
{
fieldList.Add(Builders<T>.Projection.Include(field[i].ToString()));
}
var projection = Builders<T>.Projection.Combine(fieldList);
fieldList?.Clear(); //不排序
if (sort == null) return client.Find(filter).Project<T>(projection).Skip((pageIndex - 1) * pageSize).Limit(pageSize).ToList(); //排序查詢
return client.Find(filter).Sort(sort).Project<T>(projection).Skip((pageIndex - 1) * pageSize).Limit(pageSize).ToList(); }
catch (Exception ex)
{
throw ex;
}
}
#endregion #region FindListByPageAsync 非同步分頁查詢集合
/// <summary>
/// 非同步分頁查詢集合
/// </summary>
/// <param name="host">mongodb連線資訊</param>
/// <param name="filter">查詢條件</param>
/// <param name="pageIndex">當前頁</param>
/// <param name="pageSize">頁容量</param>
/// <param name="field">要查詢的欄位,不寫時查詢全部</param>
/// <param name="sort">要排序的欄位</param>
/// <returns></returns>
public static async Task<List<T>> FindListByPageAsync(MongodbHost host, FilterDefinition<T> filter, int pageIndex, int pageSize, string[] field = null, SortDefinition<T> sort = null)
{
try
{
var client = MongodbClient<T>.MongodbInfoClient(host);
//不指定查詢欄位
if (field == null || field.Length == 0)
{
if (sort == null) return await client.Find(filter).Skip((pageIndex - 1) * pageSize).Limit(pageSize).ToListAsync();
//進行排序
return await client.Find(filter).Sort(sort).Skip((pageIndex - 1) * pageSize).Limit(pageSize).ToListAsync();
} //制定查詢欄位
var fieldList = new List<ProjectionDefinition<T>>();
for (int i = 0; i < field.Length; i++)
{
fieldList.Add(Builders<T>.Projection.Include(field[i].ToString()));
}
var projection = Builders<T>.Projection.Combine(fieldList);
fieldList?.Clear(); //不排序
if (sort == null) return await client.Find(filter).Project<T>(projection).Skip((pageIndex - 1) * pageSize).Limit(pageSize).ToListAsync(); //排序查詢
return await client.Find(filter).Sort(sort).Project<T>(projection).Skip((pageIndex - 1) * pageSize).Limit(pageSize).ToListAsync(); }
catch (Exception ex)
{
throw ex;
}
}
#endregion #region Save 替換原資料表列 (欄位刪除新增) public static T Save(MongodbHost host, FilterDefinition<T> filter, T t)
{
try
{
var client = MongodbClient<T>.MongodbInfoClient(host);
return client.FindOneAndReplace(filter, t);
}
catch (Exception ex)
{
throw ex;
}
} #endregion #region SaveAsync 替換原資料表列 (欄位刪除新增) public static async Task<T> SaveAsync(MongodbHost host, FilterDefinition<T> filter, T t)
{
try
{
var client = MongodbClient<T>.MongodbInfoClient(host);
return await client.FindOneAndReplaceAsync(filter, t);
}
catch (Exception ex)
{
throw ex;
}
} #endregion }
}
寫好工具類我們就可以直接寫增刪改查了。
3、連線MongoDB編編寫語句
3.1、插入
先定義實體類,下面就不在重複說定義實體了。


[BsonIgnoreExtraElements] //忽略增加項(MongoDB是文件型資料庫,所以資料欄位是根據傳入的資料自動增加的,如果不忽略,增加項,查詢返回實體就少了欄位報錯,當然也可以查詢指定欄位)
public class empty_collection
{
public ObjectId _id { get; set; } //主鍵
public string Name { get; set; } //姓名
public List<ClassTable> ClassTable { get; set; } //資料集合
public DateTime CreateDate { get; set; } //建立時間
} public class ClassTable
{
public string ItemName { get; set; } //鍵名
public string ItemValue { get; set; } //值
} //返回型別實體
public class ResultInfo
{
public int code { get; set; }
public string message { get; set; }
public object result { get; set; }
}
編寫插入方法,注意看裡面的註釋,資料庫連線的字串格式、傳值的型別等都有詳細註釋,這裡就不進行囉嗦,直接上菜。


//插入
//GET api/values/InsertDate
[HttpGet("InsertDate")]
public JsonResult InsertDate()
{
ResultInfo res = new ResultInfo(); try
{
//連線mongodb的固定格式,應該寫在配置裡面,由於這裡做演示,所以單獨寫
//user:user 第一個是使用者名稱,第二個是密碼
//localhost:27017 是你資料庫的連線
//TestData 是你的資料庫名稱
var mongodbClient = "mongodb://user:user@localhost:27017/TestData";
MongodbHost mongodb = new MongodbHost(mongodbClient); mongodb.DataBase = "TestData"; //資料庫名
mongodb.Table = "empty_collection"; //操作的資料表(如果資料庫沒有定義表名,插入時會自動定義) List<ClassTable> ctList = new List<ClassTable>();
int i = 0;
while(i<3)
{
ClassTable ct = new ClassTable();
switch (i)
{
case 0:
ct.ItemName = "班級";
ct.ItemValue = "取經天團";
break;
case 1:
ct.ItemName = "種族";
ct.ItemValue = "龍族";
break;
case 2:
ct.ItemName = "戰鬥力";
ct.ItemValue = "999999";
break;
}
ctList.Add(ct);
i++;
} empty_collection model = new empty_collection()
{
Name = "白龍馬",
ClassTable = ctList,
CreateDate=DateTime.Now
};
List<empty_collection> Listmodel = new List<empty_collection>();
Listmodel.Add(model);
var resCount=TMongodbHelper<empty_collection>.InsertMany(mongodb, Listmodel); // 插入多條資料 res.code = resCount;
res.message = resCount > 0 ? "操作成功" : "操作失敗";
}
catch (Exception ex)
{
res.code = -2;
res.message = "操作失敗:" + ex.Message;
} return new JsonResult(res);
}
然後我們執行呼叫這個方法,檢視一下資料庫的值,很顯然寫入成功了。
3.2、查詢
編寫查詢方法,然後呼叫這個方法。


//查詢
//GET api/values/GetDateList
[HttpGet("GetDateList")]
public JsonResult GetDateList()
{
ResultInfo res = new ResultInfo();
try
{
//連線mongodb的固定格式,應該寫在配置裡面,由於這裡做演示,所以單獨寫
//user:user 第一個是使用者名稱,第二個是密碼
//localhost:27017 是你資料庫的連線
//TestData 是你的資料庫名稱
var mongodbClient = "mongodb://user:user@localhost:27017/TestData";
MongodbHost mongodb = new MongodbHost(mongodbClient); mongodb.DataBase = "TestData"; //資料庫名
mongodb.Table = "empty_collection"; //操作的資料表 #region 篩選條件(至少一個條件) var list = new List<FilterDefinition<empty_collection>>();
//Gte 大於等於 Lte 小於等於
list.Add(Builders<empty_collection>.Filter.Gte("CreateDate", "2021-01-01")); //注意:MongoDB當前方法查詢需要必傳至少一個引數,否則會報錯
var filter = Builders<empty_collection>.Filter.And(list); #endregion var GetList = TMongodbHelper<empty_collection>.FindList(mongodb, filter).ToList(); //查詢全部
//var GetList = TMongodbHelper<empty_collection>.FindListByPage(mongodb, filter, 1, 5, out count).ToList(); //分頁查詢
res.code = 0;
res.message = "查詢成功";
res.result = GetList; }
catch (Exception ex)
{
res.code = -2;
res.message = ex.Message;
}
return new JsonResult(res);
}
需要注意的是,查詢語句的資料庫互動至少有一個條件
3.3、修改
編寫修改方法,然後呼叫這個方法。


//修改
//GET api/values/UpdateDate
[HttpGet("UpdateDate")]
public JsonResult UpdateDate()
{
ResultInfo res = new ResultInfo();
try
{
//連線mongodb的固定格式,應該寫在配置裡面,由於這裡做演示,所以單獨寫
//user:user 第一個是使用者名稱,第二個是密碼
//localhost:27017 是你資料庫的連線
//TestData 是你的資料庫名稱
var mongodbClient = "mongodb://user:user@localhost:27017/TestData";
MongodbHost mongodb = new MongodbHost(mongodbClient); mongodb.DataBase = "TestData"; //資料庫名
mongodb.Table = "empty_collection"; //操作的資料表 //需要修改的條件
var UpdateList = new List<FilterDefinition<empty_collection>>();
UpdateList.Add(Builders<empty_collection>.Filter.Gte("CreateDate", "2021-01-01")); //注意:MongoDB當前方法查詢需要必傳至少一個引數,否則會報錯
UpdateList.Add(Builders<empty_collection>.Filter.Eq("Name", "白龍馬"));
var filterList = Builders<empty_collection>.Filter.And(UpdateList); //需要修改後的值
Dictionary<string, string> dicList = new Dictionary<string, string>();
dicList.Add("Name", "南無八部天龍廣力菩薩");
dicList.Add("CreateDate", DateTime.Now.ToString()); var resCount = TMongodbHelper<empty_collection>.UpdateManay(mongodb, dicList, filterList); res.code = resCount.ModifiedCount > 0 ? 0 : -2;
res.message = resCount.ModifiedCount > 0 ? "操作成功" : "操作失敗"; }
catch (Exception ex)
{
res.message = "操作失敗:" + ex.Message;
}
return new JsonResult(res);
}
3.4、刪除
編寫刪除方法,然後呼叫這個方法。


//刪除
//GET api/values/DeleteDate
[HttpGet("DeleteDate")]
public JsonResult DeleteDate()
{
ResultInfo res = new ResultInfo();
try
{
//連線mongodb的固定格式,應該寫在配置裡面,由於這裡做演示,所以單獨寫
//user:user 第一個是使用者名稱,第二個是密碼
//localhost:27017 是你資料庫的連線
//TestData 是你的資料庫名稱
var mongodbClient = "mongodb://user:user@localhost:27017/TestData";
MongodbHost mongodb = new MongodbHost(mongodbClient); mongodb.DataBase = "TestData"; //資料庫名
mongodb.Table = "empty_collection"; //操作的資料表 #region 篩選條件(至少一個條件) var list = new List<FilterDefinition<empty_collection>>();
//Gte 大於等於 Lte 小於等於
list.Add(Builders<empty_collection>.Filter.Gte("CreateDate", "2021-01-01")); //注意:MongoDB當前方法查詢需要必傳至少一個引數,否則會報錯
list.Add(Builders<empty_collection>.Filter.Eq("Name", "南無八部天龍廣力菩薩"));
var filter = Builders<empty_collection>.Filter.And(list); #endregion var resCount = TMongodbHelper<empty_collection>.DeleteMany(mongodb, filter); res.code = resCount.DeletedCount > 0 ? 0 : -2;
res.message = resCount.DeletedCount > 0 ? "操作成功" : "操作失敗"; }
catch (Exception ex)
{
res.message = "操作失敗:" + ex.Message;
}
return new JsonResult(res);
}
原始碼下載(git)
https://gitee.com/xiongze/MongoDBTest.git
https://gitee.com/xiongze/MongoDBTest
後語
NoSql非關係型資料庫之MongoDB在專案中的初步應用我們就介紹到這裡了,
有想法其他想法的可以在評論區留言討論。
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作者:熊澤-學習中的苦與樂 公眾號:熊澤有話說 出處:https://www.cnblogs.com/xiongze520/p/15001789.html 創作不易,任何人或團體、機構全部轉載或者部分轉載、摘錄,請在文章明顯位置註明作者和原文連結。 |