Merge-Excel-Documents

Real Time Examples in Excel/Merge Excel Documents/.NET Core/MergeExcel.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.9.34310.174
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MergeExcel", "MergeExcel\MergeExcel.csproj", "{B68720C9-71D9-4706-B1E2-7C207699EF1D}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{B68720C9-71D9-4706-B1E2-7C207699EF1D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{B68720C9-71D9-4706-B1E2-7C207699EF1D}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{B68720C9-71D9-4706-B1E2-7C207699EF1D}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B68720C9-71D9-4706-B1E2-7C207699EF1D}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {C8553F0E-B638-4BC4-9E5B-2FC2C818FB4A}
+	EndGlobalSection
+EndGlobal

Real Time Examples in Excel/Merge Excel Documents/.NET Core/MergeExcel/MergeExcel.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Syncfusion.XlsIO.Net.Core" Version="23.2.4" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Folder Include="Data\" />
+    <Folder Include="Output\" />
+  </ItemGroup>
+
+</Project>

Real Time Examples in Excel/Merge Excel Documents/.NET Core/MergeExcel/Program.cs

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+// See https://aka.ms/new-console-template for more information
+using Syncfusion.XlsIO;
+
+
+namespace MergeExcel
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            string inputPath = @"../../../Data/";
+
+            string outputPath = @"../../../Output/";
+
+            FileInfo[] files = new DirectoryInfo(inputPath).GetFiles();
+
+            List<Stream> streams = new List<Stream>();
+
+            foreach (FileInfo file in files)
+            {
+                streams.Add(file.OpenRead());
+            }
+
+            Stream mergedStream = MergeExcelDocuments(streams);
+
+            FileStream fileStream = new FileStream(outputPath + "MergedExcel.xlsx", FileMode.Create, FileAccess.Write);
+            mergedStream.Position = 0;
+            mergedStream.CopyTo(fileStream);
+            fileStream.Close();
+        }
+
+        /// <summary>
+        /// Merge Excel documents from the list of Excel streams
+        /// </summary>
+        /// <param name="streams">List of Excel document stream to be merged</param>
+        /// <returns></returns>
+        public static Stream MergeExcelDocuments(List<Stream> streams)
+        {
+            using (ExcelEngine excelEngine = new ExcelEngine())
+            {
+                IApplication application = excelEngine.Excel;
+                application.DefaultVersion = ExcelVersion.Xlsx;
+                IWorkbook workbook = application.Workbooks.Create(0);
+
+                //Loop through each Excel document and add the worksheets to the new workbook
+                foreach (Stream stream in streams)
+                {
+                    stream.Position = 0;
+                    IWorkbook tempWorkbook = application.Workbooks.Open(stream);
+                    workbook.Worksheets.AddCopy(tempWorkbook.Worksheets);
+                    tempWorkbook.Close();
+                }
+
+                //Save the workbook to a memory stream
+                MemoryStream memoryStream = new MemoryStream();
+                workbook.Version = ExcelVersion.Xlsx;
+                workbook.SaveAs(memoryStream);
+
+                return memoryStream;
+            }
+        }
+    }
+}
+
+