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Get version, filepath, bitness of installed versions of Excel
/**** Requires PeHeaderReader to determine bitness: http://code.cheesydesign.com/?p=572 ****/
using Microsoft.Win32;
using System;
using System.Collections.Generic;
using System.IO;
using System.Security.AccessControl;
/// <summary>
/// See: http://support.microsoft.com/kb/240794
/// </summary>
public class ExcelHelper
{
public enum ExcelVersions
{
/*
Office 97 - 7.0
Office 98 - 8.0
Office 2000 - 9.0
Office XP - 10.0
Office 2003 - 11.0
Office 2007 - 12.0
Office 2010 - 14.0 (sic!)
Office 2013 - 15.0
*/
Excel_Pre2003 = 0,
Excel_2003 = 11,
Excel_2007 = 12,
Excel_2010 = 14,
Excel_2013 = 15,
Excel_2016 = 16,
Unknown = 99
}
private ExcelVersions Version = ExcelVersions.Unknown;
public ExcelHelper(ExcelVersions version)
{
Version = version;
}
public string ExcelFilePath
{
get
{
var versionNumber = (int)Version;
var keyPath = string.Format(@"Software\Microsoft\Office\{0}.0\Excel\InstallRoot", versionNumber);
RegistryKey hklmWow32 = RegistryKey.OpenBaseKey(Microsoft.Win32.RegistryHive.LocalMachine, RegistryView.Registry32);
RegistryKey key = hklmWow32.OpenSubKey(keyPath, RegistryKeyPermissionCheck.ReadSubTree, RegistryRights.ReadKey);
if (key != null)
{
var path = key.GetValue("Path");
if (path != null)
{
path = Path.Combine(path.ToString(), "excel.exe");
if (File.Exists(path.ToString()))
return path.ToString();
else
throw new Exception("Excel path specified in Registry not found on disk: " + path);
}
throw new Exception("InstallRoot key doesn't contain Path sub-key");
}
hklmWow32 = RegistryKey.OpenBaseKey(Microsoft.Win32.RegistryHive.LocalMachine, RegistryView.Registry64);
key = hklmWow32.OpenSubKey(keyPath, RegistryKeyPermissionCheck.ReadSubTree, RegistryRights.ReadKey);
if (key != null)
{
var path = key.GetValue("Path");
if (path != null)
{
path = Path.Combine(path.ToString(), "excel.exe");
if (File.Exists(path.ToString()))
return path.ToString();
else
throw new Exception("Excel path specified in Registry not found on disk: " + path);
}
throw new Exception("InstallRoot key doesn't contain Path sub-key");
}
throw new Exception("Excel file path (InstallRoot key) not found");
}
}
public bool ExcelIs32bit
{
get
{
var file = ExcelFilePath;
if (string.IsNullOrWhiteSpace(file))
throw new Exception("Excel path could not be determined.");
if (!File.Exists(file))
throw new Exception("Excel path is incorrect.");
PeHeaderReader pe = new PeHeaderReader(file);
return pe.Is32BitHeader;
}
}
public ExcelVersions ExcelVersion
{
get { return Version; }
}
internal int ExcelVersionNumber
{
get { return (int)Version; }
}
public static string ExcelFullName(ExcelVersions version, bool is32bit)
{
var fullName = "";
if (version == ExcelVersions.Excel_2003) fullName = "Excel 2003";
else if (version == ExcelVersions.Excel_2007) fullName = "Excel 2007";
else if (version == ExcelVersions.Excel_2010) fullName = "Excel 2010";
else if (version == ExcelVersions.Excel_2013) fullName = "Excel 2013";
else if (version == ExcelVersions.Excel_2016) fullName = "Excel 2016";
else if (version == ExcelVersions.Excel_Pre2003) fullName = "(NOT SUPPORTED): Excel pre-2003";
fullName += is32bit ? " (32bit)" : " (64bit)";
return fullName;
}
public static List<ExcelVersions> GetAllInstalledVersionsOfExcel()
{
var results = new List<ExcelVersions>();
if (ExcelVersionIsInstalled(ExcelVersions.Excel_2003)) results.Add(ExcelVersions.Excel_2003);
if (ExcelVersionIsInstalled(ExcelVersions.Excel_2007)) results.Add(ExcelVersions.Excel_2007);
if (ExcelVersionIsInstalled(ExcelVersions.Excel_2010)) results.Add(ExcelVersions.Excel_2010);
if (ExcelVersionIsInstalled(ExcelVersions.Excel_2013)) results.Add(ExcelVersions.Excel_2013);
if (ExcelVersionIsInstalled(ExcelVersions.Excel_2016)) results.Add(ExcelVersions.Excel_2016);
return results;
}
private static bool ExcelVersionIsInstalled(ExcelVersions version)
{
var versionNumber = (int)version;
var keyPath = string.Format(@"Software\Microsoft\Office\{0}.0\Excel\InstallRoot", versionNumber);
RegistryKey hklmWow32 = RegistryKey.OpenBaseKey(Microsoft.Win32.RegistryHive.LocalMachine, RegistryView.Registry32);
RegistryKey key = hklmWow32.OpenSubKey(keyPath, RegistryKeyPermissionCheck.ReadSubTree, RegistryRights.ReadKey);
if (key != null)
{
var path = key.GetValue("Path");
if (path != null)
{
path = Path.Combine(path.ToString(), "excel.exe");
return File.Exists(path.ToString());
}
}
////////////////
hklmWow32 = RegistryKey.OpenBaseKey(Microsoft.Win32.RegistryHive.LocalMachine, RegistryView.Registry64);
key = hklmWow32.OpenSubKey(keyPath, RegistryKeyPermissionCheck.ReadSubTree, RegistryRights.ReadKey);
if (key != null)
{
var path = key.GetValue("Path");
if (path != null)
{
path = Path.Combine(path.ToString(), "excel.exe");
return File.Exists(path.ToString());
}
}
return false;
}
}
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