## CustomDocumentPropertyCollection class

A collection of custom document properties.

```csharp
public class CustomDocumentPropertyCollection : DocumentPropertyCollection
```

## Properties

| Name | Description |
| --- | --- |
| [Capacity](../../aspose.cells/collectionbase-1/capacity/) { get; set; } |  |
| [Count](../../aspose.cells/collectionbase-1/count/) { get; } |  |
| [Item](../../aspose.cells.properties/documentpropertycollection/item/) { get; } | Returns a [`DocumentProperty`](../documentproperty/) object by index.(Inherited from [`DocumentPropertyCollection`](../documentpropertycollection/).) |
| [Item](../../aspose.cells/collectionbase-1/item/) { get; set; } |  |
| virtual [Item](../../aspose.cells.properties/documentpropertycollection/item/) { get; } | Returns a [`DocumentProperty`](../documentproperty/) object by the name of the property.(Inherited from [`DocumentPropertyCollection`](../documentpropertycollection/).) |

## Methods

| Name | Description |
| --- | --- |
| [Add](../../aspose.cells.properties/customdocumentpropertycollection/add/#add)(string, bool) | Creates a new custom document property of the **PropertyType.Boolean** data type. |
| [Add](../../aspose.cells.properties/customdocumentpropertycollection/add/#add_3)(string, DateTime) | Creates a new custom document property of the **PropertyType.DateTime** data type. |
| [Add](../../aspose.cells.properties/customdocumentpropertycollection/add/#add_1)(string, double) | Creates a new custom document property of the **PropertyType.Float** data type. |
| [Add](../../aspose.cells.properties/customdocumentpropertycollection/add/#add_2)(string, int) | Creates a new custom document property of the **PropertyType.Number** data type. |
| [Add](../../aspose.cells.properties/customdocumentpropertycollection/add/#add_4)(string, string) | Creates a new custom document property of the **PropertyType.String** data type. |
| [AddLinkToContent](../../aspose.cells.properties/customdocumentpropertycollection/addlinktocontent/)(string, string) | Creates a new custom document property which links to content. |
| [BinarySearch](../../aspose.cells/collectionbase-1/binarysearch/)(DocumentProperty) |  |
| [BinarySearch](../../aspose.cells/collectionbase-1/binarysearch/)(DocumentProperty, IComparer<DocumentProperty>) |  |
| [BinarySearch](../../aspose.cells/collectionbase-1/binarysearch/)(int, int, DocumentProperty, IComparer<DocumentProperty>) |  |
| [Clear](../../aspose.cells/collectionbase-1/clear/)() |  |
| [Contains](../../aspose.cells/collectionbase-1/contains/)(DocumentProperty) |  |
| [Contains](../../aspose.cells.properties/documentpropertycollection/contains/)(string) | Returns true if a property with the specified name exists in the collection.(Inherited from [`DocumentPropertyCollection`](../documentpropertycollection/).) |
| [CopyTo](../../aspose.cells/collectionbase-1/copyto/)(DocumentProperty[]) |  |
| [CopyTo](../../aspose.cells/collectionbase-1/copyto/)(DocumentProperty[], int) |  |
| [CopyTo](../../aspose.cells/collectionbase-1/copyto/)(int, DocumentProperty[], int, int) |  |
| [Exists](../../aspose.cells/collectionbase-1/exists/)(Predicate<DocumentProperty>) |  |
| [Find](../../aspose.cells/collectionbase-1/find/)(Predicate<DocumentProperty>) |  |
| [FindAll](../../aspose.cells/collectionbase-1/findall/)(Predicate<DocumentProperty>) |  |
| [FindIndex](../../aspose.cells/collectionbase-1/findindex/)(Predicate<DocumentProperty>) |  |
| [FindIndex](../../aspose.cells/collectionbase-1/findindex/)(int, Predicate<DocumentProperty>) |  |
| [FindIndex](../../aspose.cells/collectionbase-1/findindex/)(int, int, Predicate<DocumentProperty>) |  |
| [FindLast](../../aspose.cells/collectionbase-1/findlast/)(Predicate<DocumentProperty>) |  |
| [FindLastIndex](../../aspose.cells/collectionbase-1/findlastindex/)(Predicate<DocumentProperty>) |  |
| [FindLastIndex](../../aspose.cells/collectionbase-1/findlastindex/)(int, Predicate<DocumentProperty>) |  |
| [FindLastIndex](../../aspose.cells/collectionbase-1/findlastindex/)(int, int, Predicate<DocumentProperty>) |  |
| [GetEnumerator](../../aspose.cells/collectionbase-1/getenumerator/)() |  |
| [IndexOf](../../aspose.cells/collectionbase-1/indexof/)(DocumentProperty) |  |
| [IndexOf](../../aspose.cells.properties/documentpropertycollection/indexof/)(string) | Gets the index of a property by name.(Inherited from [`DocumentPropertyCollection`](../documentpropertycollection/).) |
| [IndexOf](../../aspose.cells/collectionbase-1/indexof/)(DocumentProperty, int) |  |
| [IndexOf](../../aspose.cells/collectionbase-1/indexof/)(DocumentProperty, int, int) |  |
| [LastIndexOf](../../aspose.cells/collectionbase-1/lastindexof/)(DocumentProperty) |  |
| [LastIndexOf](../../aspose.cells/collectionbase-1/lastindexof/)(DocumentProperty, int) |  |
| [LastIndexOf](../../aspose.cells/collectionbase-1/lastindexof/)(DocumentProperty, int, int) |  |
| [Remove](../../aspose.cells.properties/documentpropertycollection/remove/)(string) | Removes a property with the specified name from the collection.(Inherited from [`DocumentPropertyCollection`](../documentpropertycollection/).) |
| [RemoveAt](../../aspose.cells.properties/documentpropertycollection/removeat/)(int) | Removes a property at the specified index. (2 methods) |
| [UpdateLinkedPropertyValue](../../aspose.cells.properties/customdocumentpropertycollection/updatelinkedpropertyvalue/)() | Updates values of all custom properties that are linked to content(use cell value of linked range to update value of custom property). |
| [UpdateLinkedRange](../../aspose.cells.properties/customdocumentpropertycollection/updatelinkedrange/)() | Updates all ranges that are linked to custom properties(use the value of custom document property to update cell value of linked range). |

### Remarks

Each [`DocumentProperty`](../documentproperty/) object represents a custom property of a container document.

### Examples

```csharp
namespace AsposeCellsExamples
{
    using Aspose.Cells;
    using Aspose.Cells.Properties;
    using System;

    public class CustomDocumentPropertyCollectionDemo
    {
        public static void CustomDocumentPropertyCollectionExample()
        {
            // Instantiate a Workbook object
            Workbook workbook = new Workbook();

            // Retrieve a list of all custom document properties of the Excel file
            CustomDocumentPropertyCollection customProperties = workbook.Worksheets.CustomDocumentProperties;

            // Add custom document properties
            customProperties.Add("Author", "John Doe");
            customProperties.Add("Revision", 3);
            customProperties.Add("LastModified", DateTime.Now);
            customProperties.Add("IsFinal", true);
            customProperties.Add("Rating", 4.5);

            // Add a linked custom document property
            customProperties.AddLinkToContent("LinkedProperty", "Sheet1!A1");

            // Update linked property values
            //customProperties.UpdateLinkedPropertyValue();
            customProperties.UpdateLinkedRange();

            // Accessing custom document properties
            DocumentProperty authorProperty = customProperties["Author"];
            DocumentProperty revisionProperty = customProperties["Revision"];
            DocumentProperty lastModifiedProperty = customProperties["LastModified"];
            DocumentProperty isFinalProperty = customProperties["IsFinal"];
            DocumentProperty ratingProperty = customProperties["Rating"];
            DocumentProperty linkedProperty = customProperties["LinkedProperty"];

            // Print custom document properties
            Console.WriteLine($"Author: {authorProperty.Value}");
            Console.WriteLine($"Revision: {revisionProperty.ToInt()}");
            Console.WriteLine($"Last Modified: {lastModifiedProperty.ToDateTime()}");
            Console.WriteLine($"Is Final: {isFinalProperty.ToBool()}");
            Console.WriteLine($"Rating: {ratingProperty.ToDouble()}");
            Console.WriteLine($"Linked Property: {linkedProperty.Value}");

            // Save the workbook
            workbook.Save("CustomDocumentPropertiesExample.xlsx");
            workbook.Save("CustomDocumentPropertiesExample.pdf");
        }
    }
}
```

### See Also

* class [DocumentPropertyCollection](../documentpropertycollection/)
* namespace [Aspose.Cells.Properties](../../aspose.cells.properties/)
* assembly [Aspose.Cells](../../)