How to C#: Preview Document Content Using XDoc.PowerPoint
Overview for How to Use XDoc.PowerPoint to preview document content without loading entire document in C# .NET Programming Project
RasterEdge XDoc.PowerPoint provide you with APIs to get a thumbnail bitmap of the first page in the PowerPoint document file. You can be able to get a preview of this PowerPoint document without loading or processing the entire document in memory.
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With the SDK, you can preview the document content according to the preview thumbnail by the ways as following.
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C# DLLs: Preview PowerPoint Document
Add necessary XDoc.PowerPoint DLL libraries into your created C# application as references.
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RasterEdge.Imaging.Basic.dll
RasterEdge.XDoc.Office.Inner.Common.dll
RasterEdge.Imaging.Drawing.dll
RasterEdge.Imaging.Processing.dll
RasterEdge.XDoc.Office.Inner.Office03.dll
RasterEdge.Imaging.Font.dll
RasterEdge.XDoc.PowerPoint.dll
RasterEdge.XImage.Raster.Core.dll
RasterEdge.XImage.Raster.dll
Use corresponding namespaces;
using RasterEdge.Imaging.Basic;
using RasterEdge.XDoc.PowerPoint;
Get Preview From File
You may get document preview image from an existing PowerPoint file in C#.net.
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// Get document preview from PowerPoint file
String inputFilePath1 = Program.RootPath + "\\" + "1.pptx";
Size size = new Size(200, 200);
Bitmap bmp = PPTXDocument.GetPreviewImage(inputFilePath1, size);
if (bmp == null) throw new Exception("fail to load the document preview");
// ...
|
Get Preview From Stream
You may get document preview image from stream object in C#.net.
// Get document preview from stream object
String inputFilePath1 = Program.RootPath + "\\" + "1.pptx";
Stream stream = File.Open(intputFilePath, FileMode.Open);
Size size = new Size(200, 200);
Bitmap bmp = PPTXDocument.GetPreviewImage(stream, size);
if (bmp == null) throw new Exception("fail to load the document preview");
// ...
|
Get Preview From Byte Array
You may get document preview image from byte array object in C#.net.
// Get document preview from byte array object
String inputFilePath = Program.RootPath + "\\" + "1.pptx";
Size size = new Size(200, 200);
Stream stream = File.Open(inputFilePath, FileMode.Open);
byte[] array = new byte[stream.Length];
stream.Read(array, 0, array.Length);
Bitmap bmp = PPTXDocument.GetPreviewImage(inputFilePath1);
if (bmp == null) throw new Exception("fail to load the document preview");
// ...
|
