---
title: "Class MetadataService | Customer's Canvas On-Premises"
canonical: "https://customerscanvas.com/docs/on-premises/design-atoms-cs/reference/api/Aurigma.DesignAtoms.Services/MetadataService/"
---

# Class MetadataService

> **Inheritance:** `System.Object` -> MetadataService

###### **Namespace**: [Aurigma.DesignAtoms.Services](https://customerscanvas.com/docs/on-premises/design-atoms-cs/reference/api/Aurigma.DesignAtoms.Services.md)

###### **Assembly**: Aurigma.DesignAtoms.dll

```csharp title="Syntax"
public class MetadataService : IMetadataService
```

## Implements

* [Aurigma.DesignAtoms.Services.IMetadataService](https://customerscanvas.com/docs/on-premises/design-atoms-cs/reference/api/Aurigma.DesignAtoms.Services/IMetadataService.md)

## Inherited Members

* `System.Object.ToString`
* `System.Object.Equals(System.Object)`
* `System.Object.Equals(System.Object,System.Object)`
* `System.Object.ReferenceEquals(System.Object,System.Object)`
* `System.Object.GetHashCode`
* `System.Object.GetType`
* `System.Object.MemberwiseClone`

## Constructors

### MetadataService

```csharp
public MetadataService(IFileCache fileCache)
```

## Methods

### GetMetadata

```csharp
public Task<ImageMetaData> GetMetadata(string key, GetMetadataParams metadataParams, Func<MetadataInfo, bool> validateMetadataCallback, Func<Task<Stream>> requestStreamCallback)
```

##### Parameters

| Type | Name | Description |
|:---|:---|:---|
| `System.String` | *key* |  |
| [Aurigma.DesignAtoms.Services.GetMetadataParams](https://customerscanvas.com/docs/on-premises/design-atoms-cs/reference/api/Aurigma.DesignAtoms.Services/GetMetadataParams.md) | *metadataParams* |  |
| `System.Func<Aurigma.DesignAtoms.Services.MetadataInfo,System.Boolean>` | *validateMetadataCallback* |  |
| `System.Func<System.Threading.Tasks.Task<System.IO.Stream>>` | *requestStreamCallback* |  |

##### Returns

`System.Threading.Tasks.Task<Aurigma.DesignAtoms.Model.Items.ImageMetaData>`