# GrapeCity.Documents.Excel.IPivotField.BaseItem

## Content

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<h1 id="GrapeCity_Documents_Excel_IPivotField_BaseItem_" data-uid="GrapeCity.Documents.Excel.IPivotField.BaseItem*">BaseItem Property
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<a id="GrapeCity_Documents_Excel_IPivotField_BaseItem_" data-uid="GrapeCity.Documents.Excel.IPivotField.BaseItem*"></a>
<h4 id="GrapeCity_Documents_Excel_IPivotField_BaseItem" data-uid="GrapeCity.Documents.Excel.IPivotField.BaseItem">BaseItem</h4>
<div class="markdown level1 summary"><p>Gets or sets the item in the base field for a custom calculation.</p>
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This property is valid only for data fields. Use this property together with
<a class="xref" href="GrapeCity.Documents.Excel.IPivotField.BaseField.html#GrapeCity_Documents_Excel_IPivotField_BaseField">BaseField</a> and <a class="xref" href="GrapeCity.Documents.Excel.IPivotField.Calculation.html#GrapeCity_Documents_Excel_IPivotField_Calculation">Calculation</a> to determine which item in the
base field is used by a custom calculation such as <a class="xref" href="GrapeCity.Documents.Excel.PivotFieldCalculation.html#GrapeCity_Documents_Excel_PivotFieldCalculation_PercentOf">PercentOf</a>.
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<h5 class="declaration">Declaration</h5>
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  <pre><code class="lang-csharp hljs">string BaseItem { get; set; }</code></pre>
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  <pre><code class="lang-vbnet hljs">Property BaseItem As String</code></pre>
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<h5 id="GrapeCity_Documents_Excel_IPivotField_BaseItem_examples">Examples</h5>
<pre><code class="lang-csharp">object[,] sourceData = {
    {"Product", "Country", "Amount"},
    {"Bike", "Australia", 100},
    {"Bike", "Canada", 80}
};
worksheet.Range["A1:C3"].Value = sourceData;
IPivotCache pivotCache = workbook.PivotCaches.Create(worksheet.Range["A1:C3"]);
IPivotTable pivotTable = worksheet.PivotTables.Add(pivotCache, worksheet.Range["E1"]);
pivotTable.PivotFields["Product"].Orientation = PivotFieldOrientation.RowField;
pivotTable.PivotFields["Country"].Orientation = PivotFieldOrientation.ColumnField;
pivotTable.PivotFields["Amount"].Orientation = PivotFieldOrientation.DataField;
IPivotField dataField = pivotTable.DataFields["Sum of Amount"];
dataField.Calculation = PivotFieldCalculation.PercentOf;
dataField.BaseField = "Country";
dataField.BaseItem = "Australia";
string baseItem = dataField.BaseItem;</code></pre>

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