# GrapeCity.Spreadsheet.IWorkbooks.Add

## Content

<div class="doc-site-dotnet-api-container">



<h1 id="GrapeCity_Spreadsheet_IWorkbooks_Add_" data-uid="GrapeCity.Spreadsheet.IWorkbooks.Add*">Add Method
</h1>
<div class="markdown level0 summary"></div>
<div class="markdown level0 conceptual"></div>



<a id="GrapeCity_Spreadsheet_IWorkbooks_Add_" data-uid="GrapeCity.Spreadsheet.IWorkbooks.Add*"></a>
<h4 id="GrapeCity_Spreadsheet_IWorkbooks_Add_System_String_" data-uid="GrapeCity.Spreadsheet.IWorkbooks.Add(System.String)">Add(string)</h4>
<div class="markdown level1 summary"><p>Creates a new workbook.</p>
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<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">IWorkbook Add(string name = null)</code></pre>
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<div class="codewrapper">
  <pre><code class="lang-vbnet hljs">Function Add(Optional name As String = Nothing) As IWorkbook</code></pre>
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<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-condensed">
  <thead>
    <tr>
      <th>Type</th>
      <th>Name</th>
      <th>Description</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.string">string</a></td>
      <td><span class="parametername">name</span></td>
      <td><p>The name of workbook.</p>
</td>
    </tr>
  </tbody>
</table>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-condensed">
  <thead>
    <tr>
      <th>Type</th>
      <th>Description</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td><a class="xref" href="GrapeCity.Spreadsheet.IWorkbook.html">IWorkbook</a></td>
      <td><p>A <a class="xref" href="GrapeCity.Spreadsheet.IWorkbook.html">IWorkbook</a> value represents a new created <a class="xref" href="GrapeCity.Spreadsheet.IWorkbook.html">IWorkbook</a> instance.</p>
</td>
    </tr>
  </tbody>
</table>
<h5 id="GrapeCity_Spreadsheet_IWorkbooks_Add_System_String__remarks">Remarks</h5>
<div class="markdown level1 remarks"><p>The workbook name must be unique in the workbook set.</p>
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<a id="GrapeCity_Spreadsheet_IWorkbooks_Add_" data-uid="GrapeCity.Spreadsheet.IWorkbooks.Add*"></a>
<h4 id="GrapeCity_Spreadsheet_IWorkbooks_Add_GrapeCity_Spreadsheet_IWorkbook_" data-uid="GrapeCity.Spreadsheet.IWorkbooks.Add(GrapeCity.Spreadsheet.IWorkbook)">Add(IWorkbook)</h4>
<div class="markdown level1 summary"><p>Adds an existed workbook into the workbook set.</p>
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<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">bool Add(IWorkbook workbook)</code></pre>
</div>
<div class="codewrapper">
  <pre><code class="lang-vbnet hljs">Function Add(workbook As IWorkbook) As Boolean</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-condensed">
  <thead>
    <tr>
      <th>Type</th>
      <th>Name</th>
      <th>Description</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td><a class="xref" href="GrapeCity.Spreadsheet.IWorkbook.html">IWorkbook</a></td>
      <td><span class="parametername">workbook</span></td>
      <td></td>
    </tr>
  </tbody>
</table>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-condensed">
  <thead>
    <tr>
      <th>Type</th>
      <th>Description</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.boolean">bool</a></td>
      <td><p><code>true</code> if the <code class="paramref">workbook</code> is added into current workbook set; otherwise, <code>false</code>.</p>
</td>
    </tr>
  </tbody>
</table>
<h5 id="GrapeCity_Spreadsheet_IWorkbooks_Add_GrapeCity_Spreadsheet_IWorkbook__remarks">Remarks</h5>
<div class="markdown level1 remarks"><p>The <code class="paramref">workbook</code> must not belong to any other workbook set and its name must be unique.</p>
</div>
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