SignatureLine

public SignatureLine SignatureLine { get; set; }

[C#]
//实例化一个工作簿对象
Workbook workbook = new Workbook();
Worksheet worksheet = workbook.Worksheets[0];
//在工作表中行列索引均为1的单元格位置添加图片。它是“B2”单元格
int imgIndex = worksheet.Pictures.Add(1, 1, "example.jpeg");
//获取插入的图片对象
Picture pic = worksheet.Pictures[imgIndex];
// 创建签名线对象
SignatureLine s = new SignatureLine();
s.Signer = "Simon Zhao";
s.Title = "Development Lead";
s.Email = "Simon.Zhao@aspose.com";
// 将签名线对象分配给 Picture。
pic.SignatureLine = s;
//保存excel文件。
workbook.Save("result.xlsx");