AppsheetEpplus/Utils/SqRefUtility.cs

using System;
using System.Text.RegularExpressions;

namespace AppsheetEpplus;

/// <summary>
/// Class for handling translation between ExcelAddresses and sqref addresses.
/// </summary>
public static class SqRefUtility {
  /// <summary>
  /// Transforms an address to a valid sqRef address.
  /// </summary>
  /// <param name="address">The address to transform</param>
  /// <returns>A valid SqRef address</returns>
  public static string ToSqRefAddress(string address) {
    ArgumentException.ThrowIfNullOrEmpty(address);
    address = address.Replace(",", " ");
    address = new Regex("[ ]+").Replace(address, " ");
    return address;
  }

  /// <summary>
  /// Transforms an sqRef address into a excel address
  /// </summary>
  /// <param name="address">The address to transform</param>
  /// <returns>A valid excel address</returns>
  public static string FromSqRefAddress(string address) {
    ArgumentException.ThrowIfNullOrEmpty(address);
    address = address.Replace(" ", ",");
    return address;
  }
}