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gui-cs.Terminal.Gui
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            <article class="content wrap" id="_content" data-uid="Terminal.Gui.IListDataSource">


  <h1 id="Terminal_Gui_IListDataSource" data-uid="Terminal.Gui.IListDataSource" class="text-break">Interface IListDataSource
</h1>
  <div class="markdown level0 summary">Implement <a class="xref" href="Terminal.Gui.IListDataSource.html">IListDataSource</a> to provide custom rendering for a <a class="xref" href="Terminal.Gui.ListView.html">ListView</a>.</div>
  <div class="markdown level0 conceptual"></div>
  <h6><strong>Namespace</strong>: <a class="xref" href="Terminal.html">Terminal</a>.<a class="xref" href="Terminal.Gui.html">Gui</a></h6>
  <h6><strong>Assembly</strong>: Terminal.Gui.dll</h6>
  <h5 id="Terminal_Gui_IListDataSource_syntax">Syntax</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public interface IListDataSource</code></pre>
  </div>
  <h3 id="properties">Properties
</h3>
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    <span class="divider">|</span>
    <a href="https://github.com/gui-cs/Terminal.Gui/new/develop/docfx/overrides/new?filename=Terminal_Gui_IListDataSource_Count.md&amp;value=---%0Auid%3A%20Terminal.Gui.IListDataSource.Count%0Asummary%3A%20&#39;*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax&#39;%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Edit this page</a>
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  <span class="small pull-right mobile-hide">
    <a href="tig:tig/Terminal.Gui/blob/v2_develop/Terminal.Gui/Views/ListView.cs/#L17">View Source</a>
  </span>
  <a id="Terminal_Gui_IListDataSource_Count_" data-uid="Terminal.Gui.IListDataSource.Count*"></a>
  <h4 id="Terminal_Gui_IListDataSource_Count" data-uid="Terminal.Gui.IListDataSource.Count">Count</h4>
  <div class="markdown level1 summary">Returns the number of elements to display</div>
  <div class="markdown level1 conceptual"></div>
  <h5 class="declaration">Declaration</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">int Count { get; }</code></pre>
  </div>
  <h5 class="propertyValue">Property Value</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.int32">int</a></td>
        <td></td>
      </tr>
    </tbody>
  </table>
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    <a href="https://github.com/gui-cs/Terminal.Gui/new/develop/docfx/overrides/new?filename=Terminal_Gui_IListDataSource_Length.md&amp;value=---%0Auid%3A%20Terminal.Gui.IListDataSource.Length%0Asummary%3A%20&#39;*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax&#39;%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Edit this page</a>
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    <a href="tig:tig/Terminal.Gui/blob/v2_develop/Terminal.Gui/Views/ListView.cs/#L22">View Source</a>
  </span>
  <a id="Terminal_Gui_IListDataSource_Length_" data-uid="Terminal.Gui.IListDataSource.Length*"></a>
  <h4 id="Terminal_Gui_IListDataSource_Length" data-uid="Terminal.Gui.IListDataSource.Length">Length</h4>
  <div class="markdown level1 summary">Returns the maximum length of elements to display</div>
  <div class="markdown level1 conceptual"></div>
  <h5 class="declaration">Declaration</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">int Length { get; }</code></pre>
  </div>
  <h5 class="propertyValue">Property Value</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.int32">int</a></td>
        <td></td>
      </tr>
    </tbody>
  </table>
  <h3 id="methods">Methods
</h3>
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    <a href="https://github.com/gui-cs/Terminal.Gui/new/develop/docfx/overrides/new?filename=Terminal_Gui_IListDataSource_IsMarked_System_Int32_.md&amp;value=---%0Auid%3A%20Terminal.Gui.IListDataSource.IsMarked(System.Int32)%0Asummary%3A%20&#39;*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax&#39;%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Edit this page</a>
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    <a href="tig:tig/Terminal.Gui/blob/v2_develop/Terminal.Gui/Views/ListView.cs/#L46">View Source</a>
  </span>
  <a id="Terminal_Gui_IListDataSource_IsMarked_" data-uid="Terminal.Gui.IListDataSource.IsMarked*"></a>
  <h4 id="Terminal_Gui_IListDataSource_IsMarked_System_Int32_" data-uid="Terminal.Gui.IListDataSource.IsMarked(System.Int32)">IsMarked(int)</h4>
  <div class="markdown level1 summary">Should return whether the specified item is currently marked.</div>
  <div class="markdown level1 conceptual"></div>
  <h5 class="declaration">Declaration</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">bool IsMarked(int item)</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="https://learn.microsoft.com/dotnet/api/system.int32">int</a></td>
        <td><span class="parametername">item</span></td>
        <td>Item index.</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><a href="https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool">true</a>, if marked, <a href="https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool">false</a> otherwise.</td>
      </tr>
    </tbody>
  </table>
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    <span class="divider">|</span>
    <a href="https://github.com/gui-cs/Terminal.Gui/new/develop/docfx/overrides/new?filename=Terminal_Gui_IListDataSource_Render_Terminal_Gui_ListView_Terminal_Gui_ConsoleDriver_System_Boolean_System_Int32_System_Int32_System_Int32_System_Int32_System_Int32_.md&amp;value=---%0Auid%3A%20Terminal.Gui.IListDataSource.Render(Terminal.Gui.ListView%2CTerminal.Gui.ConsoleDriver%2CSystem.Boolean%2CSystem.Int32%2CSystem.Int32%2CSystem.Int32%2CSystem.Int32%2CSystem.Int32)%0Asummary%3A%20&#39;*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax&#39;%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Edit this page</a>
  </span>
  <span class="small pull-right mobile-hide">
    <a href="tig:tig/Terminal.Gui/blob/v2_develop/Terminal.Gui/Views/ListView.cs/#L39">View Source</a>
  </span>
  <a id="Terminal_Gui_IListDataSource_Render_" data-uid="Terminal.Gui.IListDataSource.Render*"></a>
  <h4 id="Terminal_Gui_IListDataSource_Render_Terminal_Gui_ListView_Terminal_Gui_ConsoleDriver_System_Boolean_System_Int32_System_Int32_System_Int32_System_Int32_System_Int32_" data-uid="Terminal.Gui.IListDataSource.Render(Terminal.Gui.ListView,Terminal.Gui.ConsoleDriver,System.Boolean,System.Int32,System.Int32,System.Int32,System.Int32,System.Int32)">Render(ListView, ConsoleDriver, bool, int, int, int, int, int)</h4>
  <div class="markdown level1 summary">This method is invoked to render a specified item, the method should cover the entire provided width.</div>
  <div class="markdown level1 conceptual"></div>
  <h5 class="declaration">Declaration</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">void Render(ListView container, ConsoleDriver driver, bool selected, int item, int col, int line, int width, int start = 0)</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="Terminal.Gui.ListView.html">ListView</a></td>
        <td><span class="parametername">container</span></td>
        <td>The list view to render.</td>
      </tr>
      <tr>
        <td><a class="xref" href="Terminal.Gui.ConsoleDriver.html">ConsoleDriver</a></td>
        <td><span class="parametername">driver</span></td>
        <td>The console driver to render.</td>
      </tr>
      <tr>
        <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.boolean">bool</a></td>
        <td><span class="parametername">selected</span></td>
        <td>Describes whether the item being rendered is currently selected by the user.</td>
      </tr>
      <tr>
        <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></td>
        <td><span class="parametername">item</span></td>
        <td>The index of the item to render, zero for the first item and so on.</td>
      </tr>
      <tr>
        <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></td>
        <td><span class="parametername">col</span></td>
        <td>The column where the rendering will start</td>
      </tr>
      <tr>
        <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></td>
        <td><span class="parametername">line</span></td>
        <td>The line where the rendering will be done.</td>
      </tr>
      <tr>
        <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></td>
        <td><span class="parametername">width</span></td>
        <td>The width that must be filled out.</td>
      </tr>
      <tr>
        <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></td>
        <td><span class="parametername">start</span></td>
        <td>The index of the string to be displayed.</td>
      </tr>
    </tbody>
  </table>
  <h5 id="Terminal_Gui_IListDataSource_Render_Terminal_Gui_ListView_Terminal_Gui_ConsoleDriver_System_Boolean_System_Int32_System_Int32_System_Int32_System_Int32_System_Int32__remarks">Remarks</h5>
  <div class="markdown level1 remarks">The default color will be set before this method is invoked, and will be based on whether the item is selected or not.</div>
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    <a href="https://github.com/gui-cs/Terminal.Gui/new/develop/docfx/overrides/new?filename=Terminal_Gui_IListDataSource_SetMark_System_Int32_System_Boolean_.md&amp;value=---%0Auid%3A%20Terminal.Gui.IListDataSource.SetMark(System.Int32%2CSystem.Boolean)%0Asummary%3A%20&#39;*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax&#39;%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Edit this page</a>
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  <span class="small pull-right mobile-hide">
    <a href="tig:tig/Terminal.Gui/blob/v2_develop/Terminal.Gui/Views/ListView.cs/#L53">View Source</a>
  </span>
  <a id="Terminal_Gui_IListDataSource_SetMark_" data-uid="Terminal.Gui.IListDataSource.SetMark*"></a>
  <h4 id="Terminal_Gui_IListDataSource_SetMark_System_Int32_System_Boolean_" data-uid="Terminal.Gui.IListDataSource.SetMark(System.Int32,System.Boolean)">SetMark(int, bool)</h4>
  <div class="markdown level1 summary">Flags the item as marked.</div>
  <div class="markdown level1 conceptual"></div>
  <h5 class="declaration">Declaration</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">void SetMark(int item, bool value)</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="https://learn.microsoft.com/dotnet/api/system.int32">int</a></td>
        <td><span class="parametername">item</span></td>
        <td>Item index.</td>
      </tr>
      <tr>
        <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.boolean">bool</a></td>
        <td><span class="parametername">value</span></td>
        <td>If set to <a href="https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool">true</a> value.</td>
      </tr>
    </tbody>
  </table>
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    <a href="https://github.com/gui-cs/Terminal.Gui/new/develop/docfx/overrides/new?filename=Terminal_Gui_IListDataSource_ToList.md&amp;value=---%0Auid%3A%20Terminal.Gui.IListDataSource.ToList%0Asummary%3A%20&#39;*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax&#39;%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Edit this page</a>
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    <a href="tig:tig/Terminal.Gui/blob/v2_develop/Terminal.Gui/Views/ListView.cs/#L59">View Source</a>
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  <a id="Terminal_Gui_IListDataSource_ToList_" data-uid="Terminal.Gui.IListDataSource.ToList*"></a>
  <h4 id="Terminal_Gui_IListDataSource_ToList" data-uid="Terminal.Gui.IListDataSource.ToList">ToList()</h4>
  <div class="markdown level1 summary">Return the source as IList.</div>
  <div class="markdown level1 conceptual"></div>
  <h5 class="declaration">Declaration</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">IList ToList()</code></pre>
  </div>
  <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.collections.ilist">IList</a></td>
        <td></td>
      </tr>
    </tbody>
  </table>

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