C#/VB.NET 给Excel添加、删除数字签名

一、程序环境

以下内容通过C#及VB.NET代介绍如何给Excel文档添加数字签名，以及删除Excel文档中已有的数字签名。工具使用最近发布的Spire.XLS for .NET 版本10.11.2，可在官网下载包，或者通过Nuget搜索下载；编辑代码前，注意先将Spire.XLS.dll添加引用到VS，并添加相应using指令，如下添加引用效果：

 

 

二、C# / VB示例代码

1. 添加数字签名

C#

using Spire.Xls;
 Spire.Xls.Core.MergeSpreadsheet.Interfaces;
 System;
 System.Security.Cryptography.X509Certificates;


namespace DigitalSignature_XLS
{
    class Program
    {
        static void Main(string[] args)
        {
            //创建Workbook实例
            Workbook workbook = new Workbook();
            加载Excel文档
            workbook.LoadFromFile("sample.xlsx");

            添加数字签名
            X509Certificate2 cert = new X509Certificate2(gary.pfx",123456);
            DateTime certtime = new DateTime(2020,1)">7,1)">1,1)">10,1)">36);
            IDigitalSignatures signature = workbook.AddDigitalSignature(cert,1)">Manager,certtime);

            保存文档
            workbook.SavetoFile(AddDigitalSignature.xlsxstem.Diagnostics.Process.Start();
        }
    }
}

 

VB.NET

Imports Spire.Xls
 Spire.Xls.Core.MergeSpreadsheet.Interfaces
 System.Security.Cryptography.X509Certificates


Namespace DigitalSignature_XLS
    Class Program
        Private Shared Sub Main(args As String())
            '创建Workbook实例
            Dim workbook New Workbook()
            )

            添加数字签名
            Dim cert New X509Certificate2()
            Dim certtime New DateTime(Dim signature As IDigitalSignatures = workbook.AddDigitalSignature(cert,certtime)

            stem.Diagnostics.Process.Start()
        End Sub
    End Class
End Namespace

数字签名添加效果：

 

2. 删除Excel中的数字签名

C#

 Spire.Xls;

 RemoveSignature
{
    加载Excel文档
            Workbook workbook =  Workbook();
            workbook.LoadFromFile(删除文档中的数字签名
            workbook.RemoveAllDigitalSignatures();

            RemoveDigitalSignature.xlsx);
        }
    }
}

VB.NET

 Spire.Xls

 RemoveSignature
    加载Excel文档
             Workbook()
            workbook.LoadFromFile(            workbook.RemoveAllDigitalSignatures()

            End Namespace

 

运行程序后，原有的签名已删除。