Question

我有一个mongodb集合，我将其序列化为List<BsonDocument>。

有没有办法使用C＃将文档列表保存到文件（最好是人类可读的）？

然后将此文件加载回List？

我使用它来保存Settings集合的副本，以便将其传递给不同的用户。

我无法使用mongodb技术（db.copyDatabase），因为用户不具备该级别的访问权限

Answer 1

您可以使用ToJson()

将BsonDocument转换为Json字符串

您可以使用BsonDocument.Parse()

将Json字符串转换为BsonDocument

Answer 2

根据Reda的回答我写了这个：哪个工作正常

        /// <summary>
    /// Saves the current Settings collection to a file
    /// </summary>
    internal void BackupSettings()
    {
        SaveFileDialog saveFileDialog = new SaveFileDialog();
        saveFileDialog.Filter = "JSON files (*.json)|*.json";
        saveFileDialog.InitialDirectory = @"C:\Beam.NET\Settings backups";
        saveFileDialog.RestoreDirectory = true;

        if (saveFileDialog.ShowDialog() == DialogResult.OK)
        {
            try
            {
                List<BsonDocument> settingsList = _beamDatabaseClient.GetAllSettings();

                using (StreamWriter streamWriter = new StreamWriter(saveFileDialog.FileName, false))
                {
                    foreach (var bsonDocument in settingsList)
                    {
                        var json = bsonDocument.ToJson();
                        streamWriter.WriteLine(json);
                    }
                }
            }
            catch (Exception)
            {
                MessageBox.Show("Failed to Backup Settings",
                                "Critical Warning",
                                MessageBoxButtons.OK,
                                MessageBoxIcon.Warning,
                                MessageBoxDefaultButton.Button1,
                                MessageBoxOptions.RightAlign,
                                true);
            }

        }
    }

    /// <summary>
    /// Restores the Settings collection from a file
    /// </summary>
    internal void RestoreSettings()
    {
        OpenFileDialog openFileDialog = new OpenFileDialog();
        openFileDialog.Filter = "JSON files (*.json)|*.json";
        openFileDialog.InitialDirectory = @"C:\Beam.NET\Settings backups";
        openFileDialog.RestoreDirectory = true;

        if (openFileDialog.ShowDialog() == DialogResult.OK)
        {
            try
            {
                _beamDatabaseClient.DeleteSettings();

                using (StreamReader streamReader = new StreamReader(openFileDialog.FileName))
                {
                    string json;
                    while((json = streamReader.ReadLine()) != null)
                    {
                        var bsonDocument = BsonDocument.Parse(json);

                        _beamDatabaseClient.WriteBSONRecord(Collections.Settings, bsonDocument);
                    }
                }
            }
            catch (Exception)
            {
                MessageBox.Show("Failed to Restore Settings",
                                "Critical Warning",
                                MessageBoxButtons.OK,
                                MessageBoxIcon.Warning,
                                MessageBoxDefaultButton.Button1,
                                MessageBoxOptions.RightAlign,
                                true);
            }
        }  
    }
}

我没有包含写入MongoDb和从MongoDb写入的方法，但它们只是简单的读/写

我可以使用C＃序列化mongodb集合吗？

2 个答案: