如何使用Epplus从Base64编码的图像在Excel中插入图片

我有一个格式为Base64的图像。 我需要显示从Base64编码图像的图片单元格。

Answer 1

这是我在我的代码中修复了这个问题。

var receiptSheet = package.Workbook.Worksheets.Add("Receipt"); int rowIndex = 1; int columnIndex = 1; var base64String = fromDataBase; base64String = base64String.Replace(" ", "+"); int mod4 = base64String.Length % 4; if (mod4 > 0) { base64String += new string('=', 4 - mod4); } var image = Base64StringToBitmap(base64String); ExcelPicture picture = null; if (image != null) { picture = receiptSheet.Drawings.AddPicture("pic" + rowIndex.ToString() + columnIndex.ToString(), image); picture.From.Column = columnIndex; picture.From.Row = rowIndex; picture.SetSize(600, 400); } package.Save(); private Bitmap Base64StringToBitmap(string base64String) { var bitmapData = Convert.FromBase64String(FixBase64ForImage(base64String)); var streamBitmap = new System.IO.MemoryStream(bitmapData); var bitmap = new Bitmap((Bitmap)Image.FromStream(streamBitmap)); return bitmap; } private string FixBase64ForImage(string Image) { var sbText = new System.Text.StringBuilder(Image, Image.Length); sbText.Replace("\r\n", String.Empty); sbText.Replace(" ", String.Empty); return sbText.ToString(); }