implement ExtractPicturesFromXls example

git-svn-id: http://npoi.googlecode.com/svn/trunk@21 3d0cb27c-5942-9f1f-b0c8-b51bd5f61ba7

examples/hssf/ExtractPicturesFromXls/ExtractPicturesFromXls.csproj

@@ -31,14 +31,28 @@
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
   <ItemGroup>
+    <Reference Include="Ionic.Zip, Version=1.9.1.5, Culture=neutral, PublicKeyToken=edbe51ad942a3f5c, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\..\..\solution\Lib\Ionic.Zip.dll</HintPath>
+    </Reference>
+    <Reference Include="NPOI, Version=1.2.4.0, Culture=neutral, PublicKeyToken=0df73ec7942b34e1, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\..\..\solution\Lib\NPOI.dll</HintPath>
+    </Reference>
     <Reference Include="System" />
     <Reference Include="System.Data" />
+    <Reference Include="System.Drawing" />
     <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Program.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>
+  <ItemGroup>
+    <None Include="clothes.xls">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.

examples/hssf/ExtractPicturesFromXls/Program.cs

@@ -32,6 +32,8 @@ using NPOI.HSSF.UserModel;
 using NPOI.HPSF;
 using NPOI.POIFS.FileSystem;
 using NPOI.SS.UserModel;
+using System.Collections;
+using System.Drawing;
 
 namespace ExtractPicturesFromXls
 {
@@ -41,46 +43,33 @@ namespace ExtractPicturesFromXls
         {
             InitializeWorkbook();
 
-            Sheet sheet1 = hssfworkbook.CreateSheet("Sheet1");
-
-            sheet1.CreateRow(0).CreateCell(0).SetCellValue("This is a Sample");
-            int x = 1;
-            int i = 1;
-            for (i = 1; i <= 15; i++)
+            IList pictures = hssfworkbook.GetAllPictures();
+            int i = 0;
+            foreach (HSSFPictureData pic in pictures)
             {
-                Row row = sheet1.CreateRow(i);
-                for (int j = 0; j < 15; j++)
+                string ext = pic.SuggestFileExtension();
+                if (ext.Equals("jpeg"))
+                {
+                    Image jpg = Image.FromStream(new MemoryStream(pic.Data));
+                    jpg.Save(string.Format("pic{0}.jpg",i++));
+                }
+                else if (ext.Equals("png"))
                 {
-                    row.CreateCell(j).SetCellValue(x++);
+                    Image png = Image.FromStream(new MemoryStream(pic.Data));
+                    png.Save(string.Format("pic{0}.png", i++));
                 }
+
             }
 
-            WriteToFile();
         }
 
         static HSSFWorkbook hssfworkbook;
 
-        static void WriteToFile()
-        {
-            //Write the stream data of workbook to the root directory
-            FileStream file = new FileStream(@"test.xls", FileMode.Create);
-            hssfworkbook.Write(file);
-            file.Close();
-        }
 
         static void InitializeWorkbook()
         {
-            hssfworkbook = new HSSFWorkbook();
-
-            ////create a entry of DocumentSummaryInformation
-            DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();
-            dsi.Company = "NPOI Team";
-            hssfworkbook.DocumentSummaryInformation = dsi;
-
-            ////create a entry of SummaryInformation
-            SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
-            si.Subject = "NPOI SDK Example";
-            hssfworkbook.SummaryInformation = si;
+            FileStream file = new FileStream(@"clothes.xls", FileMode.Open, FileAccess.Read);
+            hssfworkbook = new HSSFWorkbook(file);
         }
     }
 }