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Retrieve a dictionary of all named ranges in a spreadsheet document

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This topic shows how to use the classes in the Open XML SDK for Office to programmatically retrieve a dictionary that contains the names and ranges of all defined names in an Microsoft Excel 2010 or Microsoft Excel 2013 workbook. It contains an example GetDefinedNames method to illustrate this task.

GetDefinedNames Method

The GetDefinedNames method accepts a single parameter that indicates the name of the document from which to retrieve the defined names. The method returns an Dictionary instance that contains information about the defined names within the specified workbook, which may be empty if there are no defined names.

How the Code Works

The code opens the spreadsheet document, using the Open method, indicating that the document should be open for read-only access with the final false parameter. Given the open workbook, the code uses the WorkbookPart property to navigate to the main workbook part. The code stores this reference in a variable named wbPart.

// Open the spreadsheet document for read-only access.
using (SpreadsheetDocument document = SpreadsheetDocument.Open(fileName, false))
{
    // Retrieve a reference to the workbook part.
    var wbPart = document.WorkbookPart;

Retrieving the Defined Names

Given the workbook part, the next step is simple. The code uses the Workbook property of the workbook part to retrieve a reference to the content of the workbook, and then retrieves the DefinedNames collection provided by the Open XML SDK. This property returns a collection of all of the defined names that are contained within the workbook. If the property returns a non-null value, the code then iterates through the collection, retrieving information about each named part and adding the key name) and value (range description) to the dictionary for each defined name.

// Retrieve a reference to the defined names collection.
DefinedNames? definedNames = wbPart?.Workbook?.DefinedNames;

// If there are defined names, add them to the dictionary.
if (definedNames is not null)
{
    foreach (DefinedName dn in definedNames)
    {
        if (dn?.Name?.Value is not null && dn?.Text is not null)
        {
            returnValue.Add(dn.Name.Value, dn.Text);
        }
    }
}

Sample Code

The following is the complete GetDefinedNames code sample in C# and Visual Basic.

using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Spreadsheet;
using System;
using System.Collections.Generic;

static Dictionary<String, String>GetDefinedNames(String fileName)
{
    // Given a workbook name, return a dictionary of defined names.
    // The pairs include the range name and a string representing the range.
    var returnValue = new Dictionary<String, String>();

    // Open the spreadsheet document for read-only access.
    using (SpreadsheetDocument document = SpreadsheetDocument.Open(fileName, false))
    {
        // Retrieve a reference to the workbook part.
        var wbPart = document.WorkbookPart;


        // Retrieve a reference to the defined names collection.
        DefinedNames? definedNames = wbPart?.Workbook?.DefinedNames;

        // If there are defined names, add them to the dictionary.
        if (definedNames is not null)
        {
            foreach (DefinedName dn in definedNames)
            {
                if (dn?.Name?.Value is not null && dn?.Text is not null)
                {
                    returnValue.Add(dn.Name.Value, dn.Text);
                }
            }
        }

    }

    return returnValue;
}