# GrapeCity.Documents.Excel.ISignatureSet

## Content

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  <h1 id="GrapeCity_Documents_Excel_ISignatureSet" data-uid="GrapeCity.Documents.Excel.ISignatureSet" class="text-break">ISignatureSet Interface
</h1>
  <div class="markdown level0 summary"><p>A collection of Signature objects that correspond to
the digital signature attached to a document.</p>
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  <div class="markdown level0 conceptual"></div>
  <h6><strong>Namespace</strong>: <a class="xref" href="GrapeCity.Documents.Excel.html">GrapeCity.Documents.Excel</a></h6>
  <h6><strong>Assembly</strong>: DS.Documents.Excel.dll</h6>
  <h5 id="GrapeCity_Documents_Excel_ISignatureSet_syntax">Syntax</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public interface ISignatureSet : IReadOnlyList&lt;ISignature&gt;, IReadOnlyCollection&lt;ISignature&gt;, IEnumerable&lt;ISignature&gt;, IEnumerable</code></pre>
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  <div class="codewrapper">
    <pre><code class="lang-vbnet hljs">Public Interface ISignatureSet
    Inherits IReadOnlyList(Of ISignature), IReadOnlyCollection(Of ISignature), IEnumerable(Of ISignature), IEnumerable</code></pre>
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  <h3 id="properties">Properties
</h3>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td id="GrapeCity_Documents_Excel_ISignatureSet_CanAddSignatureLine" data-uid="GrapeCity.Documents.Excel.ISignatureSet.CanAddSignatureLine">
          <a class="xref" href="GrapeCity.Documents.Excel.ISignatureSet.CanAddSignatureLine.html#GrapeCity_Documents_Excel_ISignatureSet_CanAddSignatureLine">CanAddSignatureLine</a>
        </td>
        <td class="markdown level1 summary"><p>Gets a <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.boolean">bool</a> value indicating whether you can add a signature line to a document. Read-only.</p>
</td>
      </tr>
      <tr>
        <td id="GrapeCity_Documents_Excel_ISignatureSet_Parent" data-uid="GrapeCity.Documents.Excel.ISignatureSet.Parent">
          <a class="xref" href="GrapeCity.Documents.Excel.ISignatureSet.Parent.html#GrapeCity_Documents_Excel_ISignatureSet_Parent">Parent</a>
        </td>
        <td class="markdown level1 summary"><p>Returns the Parent object for the specified object.</p>
</td>
      </tr>
      <tr>
        <td id="GrapeCity_Documents_Excel_ISignatureSet_SkipCertificateValidationOnExporting" data-uid="GrapeCity.Documents.Excel.ISignatureSet.SkipCertificateValidationOnExporting">
          <a class="xref" href="GrapeCity.Documents.Excel.ISignatureSet.SkipCertificateValidationOnExporting.html#GrapeCity_Documents_Excel_ISignatureSet_SkipCertificateValidationOnExporting">SkipCertificateValidationOnExporting</a>
        </td>
        <td class="markdown level1 summary"><p>Indicates whether the validation of the attached digital certificate of the signed signature
should be skipped when exporting signed signatures. The default value is true.</p>
<p>
If certificate validation is skipped, the certificate will be treated as valid.
This is the default behavior.
</p><p>
Otherwise, the certificate will be validated with X.509 chain. 
The validation requires Internet connection and
will read the X.509 certificate storage of the current user and local machine.
</p>
</td>
      </tr>
    </tbody>
  </table>
  <h3 id="methods">Methods
</h3>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td id="GrapeCity_Documents_Excel_ISignatureSet_AddNonVisibleSignature" data-uid="GrapeCity.Documents.Excel.ISignatureSet.AddNonVisibleSignature">
          <a class="xref" href="GrapeCity.Documents.Excel.ISignatureSet.AddNonVisibleSignature.html#GrapeCity_Documents_Excel_ISignatureSet_AddNonVisibleSignature">AddNonVisibleSignature()</a>
        </td>
        <td class="markdown level1 summary"><p>Creates a signature packet when digitally signing a document.
The signature will be discarded if you save the workbook without signing it.</p>
</td>
      </tr>
      <tr>
        <td id="GrapeCity_Documents_Excel_ISignatureSet_AddSignatureLine_GrapeCity_Documents_Excel_IWorksheet_System_Double_System_Double_System_Double_System_Double_" data-uid="GrapeCity.Documents.Excel.ISignatureSet.AddSignatureLine(GrapeCity.Documents.Excel.IWorksheet,System.Double,System.Double,System.Double,System.Double)">
          <a class="xref" href="GrapeCity.Documents.Excel.ISignatureSet.AddSignatureLine.html#GrapeCity_Documents_Excel_ISignatureSet_AddSignatureLine_GrapeCity_Documents_Excel_IWorksheet_System_Double_System_Double_System_Double_System_Double_">AddSignatureLine(IWorksheet, double, double, double, double)</a>
        </td>
        <td class="markdown level1 summary"><p>Adds lines to a document where signatures are collected.
Only the &quot;Microsoft Office signature line&quot; is supported.
Other signature line providers, such as stamp signatures, are not supported.</p>
</td>
      </tr>
    </tbody>
  </table>

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