ワークブック内の特定のワークシートのみをロードする
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Aspose.Cellsはデフォルトでスプレッドシート全体をメモリに読み込みます。特定のシートのみをロードすることも可能です。これはパフォーマンスが向上し、メモリをより少なく消費することができる点で有用です。大きなワークブックを扱う際や多くのワークシートからなる場合に有用です。
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// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET | |
// The path to the documents directory. | |
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType); | |
// Define a new Workbook. | |
Workbook workbook; | |
// Load the workbook with the spcified worksheet only. | |
LoadOptions loadOptions = new LoadOptions(LoadFormat.Xlsx); | |
loadOptions.LoadFilter = new CustomLoad(); | |
// Creat the workbook. | |
workbook = new Workbook(dataDir+ "TestData.xlsx", loadOptions); | |
// Perform your desired task. | |
// Save the workbook. | |
workbook.Save(dataDir+ "outputFile.out.xlsx"); |
CustomLoadクラスの実装例です。
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// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET | |
class CustomLoad : LoadFilter | |
{ | |
public override void StartSheet(Worksheet sheet) | |
{ | |
if (sheet.Name == "Sheet2") | |
{ | |
// Load everything from worksheet "Sheet2" | |
this.LoadDataFilterOptions = LoadDataFilterOptions.All; | |
} | |
else | |
{ | |
// Load nothing | |
this.LoadDataFilterOptions = LoadDataFilterOptions.Structure; | |
} | |
} | |
} |