c# - 如何重命名一个mongodb数据库

Question

我需要以编程方式重命名 MongoDB 数据库。我还没有看到使用 MongoDB c# 驱动程序执行此操作的方法。

我想做这样的事情: this.mongoClient.renameDatabase("oldName","newName");

我想我可以自己动手，但我觉得现在的驱动程序应该可以做到这一点。

Answer 1

我想出了一个适合我的解决方案。当然，我正在处理较小的数据库，但这可以解决一些问题。

/// <summary>
///  Renames old database to new database by copying all its collected contents
///  ToDO: Add checks and balances to ensure all items were transferred correctly over
///  Disclaimer: use at own risk and adjust to your needs
/// </summary>
/// <param name="currentName"></param>
/// <param name="newName"></param>
public void renameDatabase(string currentName, string newName)
{

    this.mongoClient.DropDatabase(newName); //we drop the new database in case it exists

    var newDb = mongoClient.GetDatabase(newName); //get an instance of the new db

    var CurrentDb = mongoClient.GetDatabase(currentName); //get an instance of the current db

    foreach (BsonDocument Col in CurrentDb.ListCollections().ToList()) //work thru all collections in the current db
    {
        string name = Col["name"].AsString; //getting collection name

        //collection of items to copy from source collection
        dynamic collectionItems = CurrentDb.GetCollection<dynamic>(name).Find(Builders<dynamic>.Filter.Empty).ToList();

        //getting instance of new collection to store the current db collection items
        dynamic destinationCollection = newDb.GetCollection<dynamic>(name);

        //insert the source items into the new destination database collection
        destinationCollection.InsertMany(collectionItems);
    }

    //removing the old datbase
    this.mongoClient.DropDatabase(currentName);
}