如何在.Net中使用MongoDB
private static MongoClient client;private static IMongoDatabase database;
//本地配置
private const string MongoDBConnectionStr = "mongodb://localhost";
//数据库名称
private static string DefaultDataBaseName = "Test";
public MongoDBHelper()
{
GetConnection(DefaultDataBaseName);
}
/// <summary>
/// 构造函数 指定数据库
/// </summary>
/// <param name="dataBaseName"></param>
public MongoDBHelper(string dataBaseName)
{
GetConnection(dataBaseName);
}
private static void GetConnection(string dataBaseName)
{
client = new MongoClient(MongoDBConnectionStr);
database = client.GetDatabase(dataBaseName);
}
/// <summary>
/// 异步插入一条数据，手动输入collection name
/// </summary>
public Task InsertAsync<T>(string collectionName, T obj)
{
if (database == null)
{
throw new Exception("没有指定数据库");
}
var collection = database.GetCollection<T>(collectionName);
return collection.InsertOneAsync(obj);
}
/// <summary>
/// 异步插入一条数据，采用类型T的完全限定名作为collection name
/// </summary>
public Task InsertAsync<T>(T obj)
{
return InsertAsync(typeof(T).FullName, obj);
}
/// <summary>
/// 异步插入多条数据，手动输入collection name
/// </summary>
public Task BatchInsertAsync<T>(string collectionName, IEnumerable<T> objs)
{
if (database == null)
{
throw new Exception("没有指定数据库");
}
if (objs == null)
{
throw new ArgumentException();
}
var collection = database.GetCollection<T>(collectionName);
return collection.InsertManyAsync(objs);
}
/// <summary>
/// 异步插入多条数据，采用类型T的完全限定名作为collection name
/// </summary>
public Task BatchInsertAsync<T>(IEnumerable<T> objs)
{
return BatchInsertAsync(typeof(T).FullName, objs);
}
/// <summary>
/// 插入一条数据
/// </summary>
public void Insert<T>(T obj)
{
InsertAsync(obj).Wait();
}
/// <summary>
/// 插入多条数据
/// </summary>
public void Insert<T>(IEnumerable<T> objs)
{
BatchInsertAsync(objs).Wait();
}
/// <summary>
/// MongoDB C# Driver的Find方法，返回IFindFluent。手动输入collection name
/// </summary>
public IFindFluent<T, T> Find<T>(string collectionName, FilterDefinition<T> filter, FindOptions options = null)
{
if (database == null)
{
throw new Exception("没有指定数据库");
}
var collection = database.GetCollection<T>(collectionName);
return collection.Find(filter, options);
}
/// <summary>
/// MongoDB C# Driver的Find方法，返回IFindFluent。采用类型T的完全限定名作为collection name
/// </summary>
public IFindFluent<T, T> Find<T>(FilterDefinition<T> filter, FindOptions options = null)
{
return Find(typeof(T).FullName, filter, options);
}
/// <summary>
/// 取符合条件的数据 sort中多个排序条件逗号分隔，默认asc
/// </summary>
public List<T> Get<T>(Expression<Func<T, bool>> condition, int skip, int limit, string sort)
{
return Get(new List<Expression<Func<T, bool>>> { condition }, skip, limit, sort);
}
public List<T> Get<T>(Expression<Func<T, bool>> condition)
{
return Get(condition, 0, 0, null);
}
/// <summary>
/// 取符合条件的数据 sort中多个排序条件逗号分隔，默认asc
/// </summary>
public List<T> Get<T>(List<Expression<Func<T, bool>>> conditions, int skip, int limit, string sort)
{
if (conditions == null || conditions.Count == 0)
{
conditions = new List<Expression<Func<T, bool>>> { x => true };
}
var builder = Builders<T>.Filter;
var filter = builder.And(conditions.Select(x => builder.Where(x)));
var ret = new List<T>();
try
{
List<SortDefinition<T>> sortDefList = new List<SortDefinition<T>>();
if (sort != null)
{
var sortList = sort.Split(',');
for (var i = 0; i < sortList.Length; i++)
{
var sl = Regex.Replace(sortList.Trim(), @"\s+", " ").Split(' ');
if (sl.Length == 1 || (sl.Length >= 2 && sl.ToLower() == "asc"))
{
sortDefList.Add(Builders<T>.Sort.Ascending(sl));
}
else if (sl.Length >= 2 && sl.ToLower() == "desc")
{
sortDefList.Add(Builders<T>.Sort.Descending(sl));
}
}
}
var sortDef = Builders<T>.Sort.Combine(sortDefList);
ret = Find(filter).Sort(sortDef).Skip(skip).Limit(limit).ToListAsync().Result;
}
catch (Exception e)
{
//异常处理
}
return ret;
}
public List<T> Get<T>(List<Expression<Func<T, bool>>> conditions)
{
return Get(conditions, 0, 0, null);
}
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