将网络图片从URL加载到Excel工作表

从URL加载图像到Excel工作表

Aspose.Cells for .NET API提供了一种简单易行的方法，可以从URL中加载图像到Excel工作表中。本文介绍了使用Aspose.Cells API将图像数据下载到流中，然后将其插入工作表的方法。使用这种方法，图像将成为Excel文件的一部分，并且每次打开工作表时都不会重新下载。

示例代码

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
// Define memory stream object
System.IO.MemoryStream objImage;

// Define web client object
System.Net.WebClient objwebClient;

// Define a string which will hold the web image url
string sURL = "http:// Www.aspose.com/Images/aspose-logo.jpg";

try
{
    // Instantiate the web client object
    objwebClient = new System.Net.WebClient();

    // Now, extract data into memory stream downloading the image data into the array of bytes
    objImage = new System.IO.MemoryStream(objwebClient.DownloadData(sURL));

    // Create a new workbook
    Aspose.Cells.Workbook wb = new Aspose.Cells.Workbook();

    // Get the first worksheet in the book
    Aspose.Cells.Worksheet sheet = wb.Worksheets[0];

    // Get the first worksheet pictures collection
    Aspose.Cells.Drawing.PictureCollection pictures = sheet.Pictures;

    // Insert the picture from the stream to B2 cell
    pictures.Add(1, 1, objImage);

    // Save the excel file
    wb.Save(dataDir+ "webimagebook.out.xlsx");
}
catch (Exception ex)
{
    // Write the error message on the console
    Console.WriteLine(ex.Message);
}

可能存在情况，您总是希望从URL获取更新后的图像。要实现这一点，可以按照从Web地址插入链接图片文章中给出的说明。通过遵循这种方法，图像在每次打开工作表时都从URL加载。