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我想从数据表中获取pdf并将其附加到CRM中的实体。为此我使用这个代码。不幸的是,创建的pdf已损坏,我无法打开它。有任何想法吗?itextSharp datatable到pdf base64字符串 - pdf损坏
var bytes = memoryStream.ToArray();
var encodedPDF = Convert.ToBase64String(bytes);
document.Close();
移动ToArray的调用之前的千钧一发:
private static string ExportToBase64Pdf(DataTable dt, string entityName)
{
using (MemoryStream memoryStream = new MemoryStream())
{
Document document = new Document(PageSize.A4);
PdfWriter writer = PdfWriter.GetInstance(document, memoryStream);
document.Open();
Font font5 = FontFactory.GetFont(FontFactory.HELVETICA, 5);
PdfPTable table = new PdfPTable(dt.Columns.Count);
float[] widths = new float[dt.Columns.Count];
for (int i =0; i<dt.Columns.Count; i++) { widths[i] = 4f; }
table.SetWidths(widths);
table.WidthPercentage = 100;
PdfPCell cell = new PdfPCell(new Phrase(entityName));
cell.Colspan = dt.Columns.Count;
foreach (DataColumn c in dt.Columns)
{
table.AddCell(new Phrase(c.ColumnName, font5));
}
foreach (DataRow r in dt.Rows)
{
for (int i = 0; i < dt.Columns.Count; i++)
{
table.AddCell(new Phrase(r[i].ToString(), font5));
}
}
document.Add(table);
var bytes = memoryStream.ToArray();
var encodedPDF = Convert.ToBase64String(bytes);
document.Close();
return encodedPDF;
}
}
非常感谢!你能否详细说明一下为什么会造成如此大的差异? :)) – cAMPy
当调用'Document.Close'时,'PdfWriter'完成pdf,尤其是它写入pdf对象交叉引用和文件尾部,这两个部分在关闭之前无法写入。因此,您的原始代码检索到不完整的pdf。 – mkl