MongoDB入门教程之C#驱动操作实例 - 黑马程序员技术交流社区

#region 数据实体
/// <summary>
/// 数据实体
/// </summary>
public class Person
{
[MongoAlias("_id")]
public string ID { get; set; }
public string Name { get; set; }
public int Age { get; set; }
public DateTime CreateTime { get; set; }
}
#endregion

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string connectionString = string.Empty;
string databaseName = string.Empty;
string collectionName = string.Empty;
static MongodbHelper<T> mongodb;
#region 初始化操作
/// <summary>
/// 初始化操作
/// </summary>
public MongodbHelper()
{
connectionString = "Server=127.0.0.1:2222";
databaseName = "shopex";
collectionName = "person";
}
#endregion

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#region 实现linq查询的映射配置
/// <summary>
/// 实现linq查询的映射配置
/// </summary>
public MongoConfiguration configuration
{
get
{
var config = new MongoConfigurationBuilder();
config.Mapping(mapping =>
{
mapping.DefaultProfile(profile =>
{
profile.SubClassesAre(t => t.IsSubclassOf(typeof(T)));
});
mapping.Map<T>();
mapping.Map<T>();
});
config.ConnectionString(connectionString);
return config.BuildConfiguration();
}
}
#endregion

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#region 插入操作
/// <summary>
/// 插入操作
/// </summary>
/// <param name="person"></param>
/// <returns></returns>
public void Insert(T t)
{
using (Mongo mongo = new Mongo(configuration))
{
try
{
mongo.Connect();
var db = mongo.GetDatabase(databaseName);
var collection = db.GetCollection<T>(collectionName);
collection.Insert(t, true);
mongo.Disconnect();
}
catch (Exception)
{
mongo.Disconnect();
throw;
}
}
}
#endregion
#region 更新操作
/// <summary>
/// 更新操作
/// </summary>
/// <param name="person"></param>
/// <returns></returns>
public void Update(T t, Expression<Func<T, bool>> func)
{
using (Mongo mongo = new Mongo(configuration))
{
try
{
mongo.Connect();
var db = mongo.GetDatabase(databaseName);
var collection = db.GetCollection<T>(collectionName);
collection.Update<T>(t, func, true);
mongo.Disconnect();
}
catch (Exception)
{
mongo.Disconnect();
throw;
}
}
}
#endregion
#region 获取集合
/// <summary>
///获取集合
/// </summary>
/// <param name="person"></param>
/// <returns></returns>
public List<T> List(int pageIndex, int pageSize, Expression<Func<T, bool>> func, out int pageCount)
{
pageCount = 0;
using (Mongo mongo = new Mongo(configuration))
{
try
{
mongo.Connect();
var db = mongo.GetDatabase(databaseName);
var collection = db.GetCollection<T>(collectionName);
pageCount = Convert.ToInt32(collection.Count());
var personList = collection.Linq().Where(func).Skip(pageSize * (pageIndex - 1))
.Take(pageSize).Select(i => i).ToList();
mongo.Disconnect();
return personList;
}
catch (Exception)
{
mongo.Disconnect();
throw;
}
}
}
#endregion
#region 读取单条记录
/// <summary>
///读取单条记录
/// </summary>
/// <param name="person"></param>
/// <returns></returns>
public T Single(Expression<Func<T, bool>> func)
{
using (Mongo mongo = new Mongo(configuration))
{
try
{
mongo.Connect();
var db = mongo.GetDatabase(databaseName);
var collection = db.GetCollection<T>(collectionName);
var single = collection.Linq().FirstOrDefault(func);
mongo.Disconnect();
return single;
}
catch (Exception)
{
mongo.Disconnect();
throw;
}
}
}
#endregion
#region 删除操作
/// <summary>
/// 删除操作
/// </summary>
/// <param name="person"></param>
/// <returns></returns>
public void Delete(Expression<Func<T, bool>> func)
{
using (Mongo mongo = new Mongo(configuration))
{
try
{
mongo.Connect();
var db = mongo.GetDatabase(databaseName);
var collection = db.GetCollection<T>(collectionName);
//这个地方要注意，一定要加上T参数，否则会当作object类型处理
//导致删除失败
collection.Remove<T>(func);
mongo.Disconnect();
}
catch (Exception)
{
mongo.Disconnect();
throw;
}
}
}
#endregion

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static void Main(string[] args)
{
MongodbHelper<Person> helper = new MongodbHelper<Person>();
//插入1000条数据
for (int i = 0; i < 1000; i++)
{
helper.Insert(new Person()
{
ID = Guid.NewGuid().ToString(),
Name = "jack" + i,
Age = i,
CreateTime = DateTime.Now
});
}
Console.WriteLine("插入成功");
Console.Read();
}

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static void Main(string[] args)
{
MongodbHelper<Person> helper = new MongodbHelper<Person>();
//修改jack941改成mary
var single = helper.Single(i => i.Name == "jack941");
single.Name = "mary";
helper.Update(single, i => i.ID == single.ID);
Console.WriteLine("修改成功");
Console.Read();
}

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static void Main(string[] args)
{
MongodbHelper<Person> helper = new MongodbHelper<Person>();
//删除mary这个记录
helper.Delete(i => i.Name == "mary");
Console.WriteLine("删除成功");
Console.Read();
}

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static void Main(string[] args)
{
MongodbHelper<Person> helper = new MongodbHelper<Person>();
int pagecount;
//获取名字里面带9的人数
var list = helper.List(1, 20, i => i.Name.Contains("9"), out pagecount);
Console.Read();
}

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