Add method to get worksheet names in the same order they appear in excel (for review/comments only)

src/LinqToExcel/ExcelQueryFactory.cs

@@ -139,6 +139,17 @@ public IEnumerable<string> GetWorksheetNames()
             return ExcelUtilities.GetWorksheetNames(FileName);
         }
 
+        /// <summary>
+        /// Returns a list of worksheet names that the spreadsheet contains, in the same order that they would appear in excel
+        /// </summary>
+        public IEnumerable<string> GetWorksheetNamesOrdered()
+        {
+            if (String.IsNullOrEmpty(FileName))
+                throw new NullReferenceException("FileName property is not set");
+
+            return ExcelUtilities.GetWorksheetNamesOrdered(FileName);
+        }
+
         /// <summary>
         /// Returns a list of columns names that a worksheet contains
         /// </summary>

src/LinqToExcel/LinqToExcel.csproj

@@ -10,7 +10,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>LinqToExcel</RootNamespace>
     <AssemblyName>LinqToExcel</AssemblyName>
-    <TargetFrameworkVersion>v3.5</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <FileUpgradeFlags>
     </FileUpgradeFlags>
@@ -31,6 +31,7 @@
     <IsWebBootstrapper>false</IsWebBootstrapper>
     <UseApplicationTrust>false</UseApplicationTrust>
     <BootstrapperEnabled>true</BootstrapperEnabled>
+    <TargetFrameworkProfile />
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
@@ -42,6 +43,7 @@
     <WarningLevel>4</WarningLevel>
     <PlatformTarget>x86</PlatformTarget>
     <DocumentationFile>bin\Debug\LinqToExcel.xml</DocumentationFile>
+    <Prefer32Bit>false</Prefer32Bit>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
     <DebugType>none</DebugType>
@@ -51,6 +53,7 @@
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
     <PlatformTarget>x86</PlatformTarget>
+    <Prefer32Bit>false</Prefer32Bit>
   </PropertyGroup>
   <PropertyGroup>
     <SignAssembly>true</SignAssembly>
@@ -62,7 +65,7 @@
     <Reference Include="log4net">
       <HintPath>..\..\lib\Log4Net\log4net.dll</HintPath>
     </Reference>
-    <Reference Include="Microsoft.VisualStudio.DebuggerVisualizers, Version=9.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL" />
+    <Reference Include="Microsoft.VisualStudio.DebuggerVisualizers, Version=11.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL" />
     <Reference Include="Remotion, Version=1.13.52.2, Culture=neutral, PublicKeyToken=0669cf0452175907, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
       <HintPath>..\..\lib\Remotion\Remotion.dll</HintPath>
@@ -75,6 +78,7 @@
     <Reference Include="System.Core">
       <RequiredTargetFramework>3.5</RequiredTargetFramework>
     </Reference>
+    <Reference Include="System.IO.Compression" />
     <Reference Include="System.Xml.Linq">
       <RequiredTargetFramework>3.5</RequiredTargetFramework>
     </Reference>

src/LinqToExcel/Query/ExcelUtilities.cs

@@ -7,6 +7,9 @@
 using System.IO;
 using LinqToExcel.Domain;
 using LinqToExcel.Extensions;
+using System.IO.Compression;
+using System.Xml;
+using System.Xml.Linq;
 
 namespace LinqToExcel.Query
 {
@@ -130,6 +133,34 @@ where IsNotBuiltinTable(tableName)
             return worksheetNames;
         }
 
+        internal static IEnumerable<string> GetWorksheetNamesOrdered(string fileName)
+        {
+            if (fileName.ToLower().EndsWith("csv"))
+                return new List<string>();
+
+            //open the excel file
+            using (FileStream data = new FileStream(fileName, FileMode.Open))
+            {
+                //unzip
+                ZipArchive archive = new ZipArchive(data);
+
+                //select the correct file from the archive
+                ZipArchiveEntry appxmlFile = archive.Entries.SingleOrDefault(e => e.FullName == "docProps/app.xml");
+
+                //read the xml
+                XDocument xdoc = XDocument.Load(appxmlFile.Open());
+
+                //find the titles element
+                XElement titlesElement = xdoc.Descendants().Where(e => e.Name.LocalName == "TitlesOfParts").Single();
+
+                //extract the worksheet names
+                return titlesElement
+                    .Elements().Where(e => e.Name.LocalName == "vector").Single()
+                    .Elements().Where(e => e.Name.LocalName == "lpstr")
+                    .Select(e => e.Value);
+            }
+        }
+
         internal static bool IsTable(DataRow row)
         {
             return row["TABLE_NAME"].ToString().Contains("$");