DocumentBase.PasswordEncryptionKeyLength 属性
定义
重要
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获取 Microsoft Office Word 在用密码对文档加密时所用算法的密钥长度。
public int PasswordEncryptionKeyLength { get; }属性值
Microsoft Office Word 在用密码对文档加密时所用算法的密钥长度。
示例
如果密码加密密钥长度小于40，则下面的代码示例将设置密码加密选项。 若要使用此示例，请在 ThisDocument 文档级项目的类中运行它。
private void DocumentPasswordEncryptionKeyLength()
{
if (this.PasswordEncryptionKeyLength < 40)
{
string PasswordEncryptionProvider = "Microsoft RSA SChannel Cryptographic Provider";
string PasswordEncryptionAlgorithm = "RC4";
int PasswordEncryptionKeyLength = 56;
object PasswordEncryptionFileProperties = true;
this.SetPasswordEncryptionOptions(PasswordEncryptionProvider,
PasswordEncryptionAlgorithm, PasswordEncryptionKeyLength,
ref PasswordEncryptionFileProperties);
}
}
Private Sub DocumentPasswordEncryptionKeyLength()
If Me.PasswordEncryptionKeyLength < 40 Then
Dim PasswordEncryptionProvider As String = _
"Microsoft RSA SChannel Cryptographic Provider"
Dim PasswordEncryptionAlgorithm As String = "RC4"
Dim PasswordEncryptionKeyLength As Integer = 56
Dim PasswordEncryptionFileProperties As Object = True
Me.SetPasswordEncryptionOptions(PasswordEncryptionProvider, _
PasswordEncryptionAlgorithm, PasswordEncryptionKeyLength, _
PasswordEncryptionFileProperties)
End If
End Sub
注解
使用 SetPasswordEncryptionOptions 方法可指定在用密码对文档加密时，Word 使用的密钥长度。