IsValid

IDigitalSignature.IsValid 属性

如果此数字签名有效且文档未被篡改，则该值为真。只读布尔值。

public bool IsValid { get; }

示例

[C#]
using (Presentation pres = new Presentation("SomePresentationSigned.pptx"))
{
    foreach (DigitalSignature signature in pres.DigitalSignatures)
        Console.WriteLine("签名检查: " + (signature.IsValid ? "有效" : "无效"));
}

另见

Comments SignTime