生成工作表的缩略图
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从工作表生成缩略图可能很有用。缩略图是一个小图像,可以粘贴到 Word 文档或 PowerPoint 演示文稿中,以预览工作表内容。它可以添加到网页,用于提供下载原始文档的链接,并且具有各种其他用途。
Aspose.Cells for .NET 允许您将工作表输出为图像文件,因此制作缩略图非常容易。下面的示例代码显示了如何将工作表输出为图像文件。
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// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET | |
//Source directory | |
string sourceDir = RunExamples.Get_SourceDirectory(); | |
//Output directory | |
string outputDir = RunExamples.Get_OutputDirectory(); | |
// Instantiate and open an Excel file | |
Workbook book = new Workbook(sourceDir + "sampleGenerateThumbnailOfWorksheet.xlsx"); | |
// Define ImageOrPrintOptions | |
ImageOrPrintOptions imgOptions = new ImageOrPrintOptions(); | |
// Specify the image format | |
imgOptions.ImageType = Drawing.ImageType.Jpeg; | |
// Set the vertical and horizontal resolution | |
imgOptions.VerticalResolution = 200; | |
imgOptions.HorizontalResolution = 200; | |
// One page per sheet is enabled | |
imgOptions.OnePagePerSheet = true; | |
// Get the first worksheet | |
Worksheet sheet = book.Worksheets[0]; | |
// Render the sheet with respect to specified image/print options | |
SheetRender sr = new SheetRender(sheet, imgOptions); | |
// Render the image for the sheet | |
Bitmap bmp = sr.ToImage(0); | |
// Create a bitmap | |
Bitmap thumb = new Bitmap(600, 600); | |
// Get the graphics for the bitmap | |
System.Drawing.Graphics gr = System.Drawing.Graphics.FromImage(thumb); | |
if (bmp != null) | |
{ | |
// Draw the image | |
gr.DrawImage(bmp, 0, 0, 600, 600); | |
} | |
// Save the thumbnail | |
thumb.Save(outputDir + "outputGenerateThumbnailOfWorksheet.bmp"); |