公共 API Aspose.Cells 16.12.0 的变化
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本文档描述了 Aspose.Cells API 从版本 16.11.0 到 16.12.0 的变化，模块/应用程序开发人员可能会感兴趣。它不仅包括新的和更新的公共方法、添加和删除的类等，还包括对 Aspose.Cells 中幕后行为的任何更改的描述。
添加的 API
支持数据透视表
第二版 Aspose.Cells for C++ 支持数据透视表的创建和操作。 Aspose.Cells for C++ 提供表示数据透视表对象的 IPivotTable 类，而 IPivotTableCollection 表示数据透视表的集合。可以通过 IWorksheet 对象访问 IPivotTableCollection，并且可以在使用 IPivotTableCollection.Add 方法时将新的数据透视表添加到集合中。
以下代码片段演示了使用 Aspose.Cells for C++ API 是多么简单从头开始创建数据透视表.
C++
//Load the sample excel file
intrusive_ptr<IWorkbook> wb = Factory::CreateIWorkbook();
//Access first worksheet
intrusive_ptr<IWorksheet> ws = wb->GetIWorksheets()->GetObjectByIndex(0);
//Add source data for pivot table
intrusive_ptr<String> str = new String("Fruit");
ws->GetICells()->GetObjectByIndex(new String("A1"))->PutValue(str);
str = new String("Quantity");
ws->GetICells()->GetObjectByIndex(new String("B1"))->PutValue(str);
str = new String("Price");
ws->GetICells()->GetObjectByIndex(new String("C1"))->PutValue(str);
str = new String("Apple");
ws->GetICells()->GetObjectByIndex(new String("A2"))->PutValue(str);
str = new String("Orange");
ws->GetICells()->GetObjectByIndex(new String("A3"))->PutValue(str);
ws->GetICells()->GetObjectByIndex(new String("B2"))->PutValue(3);
ws->GetICells()->GetObjectByIndex(new String("B3"))->PutValue(4);
ws->GetICells()->GetObjectByIndex(new String("C2"))->PutValue(2);
ws->GetICells()->GetObjectByIndex(new String("C3"))->PutValue(1);
//Add pivot table
int idx = ws->GetIPivotTables()->Add(new String("A1:C3"), new String("E5"), new String("MyPivotTable"));
//Access created pivot table
intrusive_ptr<IPivotTable> pt = ws->GetIPivotTables()->GetObjectByIndex(idx);
//Manipulate pivot table rows, columns and data fields
pt->AddFieldToArea(PivotFieldType_Row, pt->GetIBaseFields()->GetObjectByIndex(0));
pt->AddFieldToArea(PivotFieldType_Data, pt->GetIBaseFields()->GetObjectByIndex(1));
pt->AddFieldToArea(PivotFieldType_Data, pt->GetIBaseFields()->GetObjectByIndex(2));
pt->AddFieldToArea(PivotFieldType_Column, pt->GetIDataField());
//Set pivot table style
pt->SetPivotTableStyleType(PivotTableStyleType_PivotTableStyleMedium9);
//Save the output excel file
wb->Save(outputPath);
除了创建新的数据透视表，Aspose.Cells for C++ API 还支持操作现有的数据透视表。 API目前支持更改数据透视表源范围内的数据，然后刷新。根据需要操作数据透视表后，最好使用 IPivotTable.RefreshData 和 IPivotTable.CalculateData 方法根据更新的数据源刷新数据透视表。
以下代码片段使用 Aspose.Cells for C++ API 来操纵现有的数据透视表.
C++
//Load the sample excel file
intrusive_ptr wb = Factory::CreateIWorkbook(samplePath);
//Access first worksheet
intrusive_ptr ws = wb->GetIWorksheets()->GetObjectByIndex(0);
//Change value of cell B3 which is inside the source data of pivot table
intrusive_ptr str = new String("Cup");
ws->GetICells()->GetObjectByIndex(new String("B3"))->PutValue(str);
//Get the value of cell H8 before refreshing pivot table
intrusive_ptr val = ws->GetICells()->GetObjectByIndex(new String("H8"))->GetStringValue();
printf("Before refreshing Pivot Table value of cell H8: %s\r\n%", val->charValue());
//Access pivot table, refresh and calculate it
intrusive_ptr pt = ws->GetIPivotTables()->GetObjectByIndex(0);
pt->RefreshData();
pt->CalculateData();
//Get the value of cell H8 after refreshing pivot table
val = ws->GetICells()->GetObjectByIndex(new String("H8"))->GetStringValue();
printf("After refreshing Pivot Table value of cell H8: %s\r\n%", val->charValue());
//Save the output excel file
wb->Save(outputPath);
支持条件格式规则
Aspose.Cells for C++ 现在可以通过公开 IFormatCondition 类向工作表添加条件格式设置规则。上述类还提供了以下方法来应用条件格式规则根据申请要求。
- IFormatCondition.GetIAboveAverage
- IFormatCondition.GetIColorScale
- IFormatCondition.GetIDataBar
- IFormatCondition.GetIIconSet
- IFormatCondition.GetITop10
以下示例代码显示如何在单元格 A1 和 B2 上添加类型为 Cell 值的条件格式设置规则。
C++
//Create an empty workbook
intrusive_ptr wb = Factory::CreateIWorkbook();
//Access first worksheet
intrusive_ptr ws = wb->GetIWorksheets()->GetObjectByIndex(0);
//Adds an empty conditional formatting
int idx = ws->GetIConditionalFormattings()->Add();
intrusive_ptr fcs = ws->GetIConditionalFormattings()->GetObjectByIndex(idx);
//Set the conditional format range
intrusive_ptr ca = ICellArea::CreateICellArea(new String("A1"), new String("A1"));
fcs->AddArea(ca);
ca = ICellArea::CreateICellArea(new String("B2"), new String("B2"));
fcs->AddArea(ca);
//Add condition and set the background color
idx = fcs->AddCondition(FormatConditionType_CellValue, OperatorType_Between, new String("=A2"), new String("100"));
intrusive_ptr fc = fcs->GetObjectByIndex(idx);
fc->GetIStyle()->SetBackgroundColor(Color::GetRed());
//User friendly message to test the output excel file.
StringPtr msgStr = new String("Red color in cells A1 and B2 is because of Conditional Formatting.");
ws->GetICells()->GetObjectByIndex(new String("A10"))->PutValue(msgStr);
//Save the output excel file
wb->Save(outputPath);
支持超链接
Aspose.Cells for C++ 现在支持向工作表单元格添加超链接.为了提供此功能，Aspose.Cells for C++ 16.12.0 公开了可通过 IWorksheet 对象访问的 IHyperlinkCollection 类，而使用 IHyperlinkCollection.Add 方法可将超链接添加到集合中，如下所示。
C++
//Create a new workbook
intrusive_ptr wb = Factory::CreateIWorkbook();
//Get the first worksheet
intrusive_ptr wsc = wb->GetIWorksheets();
intrusive_ptr ws = wsc->GetObjectByIndex(0);
//Add hyperlink in cell C7 and make use of its various methods
intrusive_ptr hypLnks = ws->GetIHyperlinks();
int idx = hypLnks->Add(new String("C7"), 1, 1, new String("http://www.aspose.com/"));
intrusive_ptr lnk = hypLnks->GetObjectByIndex(idx);
lnk->SetTextToDisplay(new String("Aspose"));
lnk->SetScreenTip(new String("Link to Aspose Website"));
//Save the workbook in xlsx format
wb->Save(dirPath->Append(new String("output.xlsx")), SaveFormat_Xlsx);
支持文档属性
Excel 应用程序支持 2 种类型的文档属性，如下所列。
- 系统定义（内置）属性：内置属性包含有关文档的一般信息，如文档标题、作者姓名、文档统计信息等。
- 用户定义（自定义）属性：由最终用户以名称值对的形式定义的自定义属性。
Aspose.Cells for C++ 支持管理两种类型的文档属性，内置和自定义Aspose.Cells' IWorkbook 类表示一个 Excel 文件。要访问内置文档属性，请使用 IWorkbook.GetBuiltInDocumentProperties，而使用 IWorkbook.GetCustomDocumentProperties 方法可以访问自定义文档属性。
以下示例代码加载现有示例电子表格并读取内置文档属性，例如标题、主题和名为 MyCustom1 的自定义属性。
C++
//Load the sample excel file
intrusive_ptr wb = Factory::CreateIWorkbook(samplePath);
//Read built-in title and subject properties
StringPtr strTitle = wb->GetIBuiltInDocumentProperties()->GetTitle();
StringPtr strSubject = wb->GetIBuiltInDocumentProperties()->GetSubject();
printf("Title: %s\r\n", strTitle->charValue());
printf("Subject: %s\r\n", strSubject->charValue());
printf("\r\n");
//Modify built-in title and subject properties
strTitle = new String("Aspose.Cells New Title");
strSubject = new String("Aspose.Cells New Subject");
wb->GetIBuiltInDocumentProperties()->SetTitle(strTitle);
wb->GetIBuiltInDocumentProperties()->SetSubject(strSubject);
//Read the custom property
StringPtr strCustomPropName = new String("MyCustom1");
StringPtr strCustomPropValue = wb->GetICustomDocumentProperties()->GetObjectByIndex(strCustomPropName)->ToString();
printf("MyCustom1: %s\r\n", strCustomPropValue->charValue());
//Add a new custom property
strCustomPropName = new String("MyCustom5");
strCustomPropValue = new String("This is my custom five.");
wb->GetICustomDocumentProperties()->AddIDocumentProperty(strCustomPropName, strCustomPropValue);
//Save the output excel file
wb->Save(outputPath);
支持 ListObjects
Excel 表格是包含任意数量的行和列的单元格矩阵，而同一个表格在 Aspose.Cells for C++ API 中被称为列表对象。 Aspose::Cells::Tables 命名空间包含处理与列表对象相关的操作的所有必要类。最值得一提的类是 IListObject 和 IListObjectCollection，它们允许创建和格式化列表对象等等。
以下示例代码加载示例电子表格文件，然后在 A1:H10 范围内创建一个列表对象（表），然后使用其各种方法显示小计。
C++
//Load the sample excel file
intrusive_ptr<IWorkbook> wb = Factory::CreateIWorkbook(samplePath);
//Access first worksheet
intrusive_ptr<IWorksheet> ws = wb->GetIWorksheets()->GetObjectByIndex(0);
//Add table i.e. list object
int idx = ws->GetIListObjects()->Add(new String("A1"), new String("H10"), true);
//Access the newly added list object
intrusive_ptr<IListObject> lo = ws->GetIListObjects()->GetObjectByIndex(idx);
//Make use of its display methods
lo->SetShowHeaderRow(true);
lo->SetShowTableStyleColumnStripes(true);
lo->SetShowTotals(true);
//Set its style
lo->SetTableStyleType(TableStyleType_TableStyleLight12);
//Set total functions of 3rd, 4th and 5th columns
lo->GetIListColumns()->GetObjectByIndex(2)->SetTotalsCalculation(TotalsCalculation_Min);
lo->GetIListColumns()->GetObjectByIndex(3)->SetTotalsCalculation(TotalsCalculation_Max);
lo->GetIListColumns()->GetObjectByIndex(4)->SetTotalsCalculation(TotalsCalculation_Count);
//Save the output excel file
wb->Save(outputPath);
支持行和列分组
Aspose.Cells for C++ API 可用于在使用 ICells 类时对行和列进行分组，ICells 类基本上是给定工作表中所有单元格的集合。 ICells 类提供了 GroupRows 和 GroupColumns 方法，以便对行和列进行分组分别。
以下代码片段演示了上述两种方法的简单使用场景。
C++
//Create an empty workbook
intrusive_ptr wb = Factory::CreateIWorkbook();
//Add worksheet for grouping rows
intrusive_ptr grpRows = wb->GetIWorksheets()->GetObjectByIndex(0);
grpRows->SetName(new String("GroupRows"));
//Add worksheet for grouping columns
int idx = wb->GetIWorksheets()->Add();
intrusive_ptr grpCols = wb->GetIWorksheets()->GetObjectByIndex(idx);
grpCols->SetName(new String("GroupColumns"));
//Add sample values in both worksheets
for (int i = 0; i<50; i++)
{
intrusive_ptr str = new String("Text");
grpRows->GetICells()->GetObjectByIndex(i, 0)->PutValue(str);
grpCols->GetICells()->GetObjectByIndex(0, i)->PutValue(str);
}
//Grouping rows at first level
grpRows->GetICells()->GroupRows(0, 10);
grpRows->GetICells()->GroupRows(12, 22);
grpRows->GetICells()->GroupRows(24, 34);
//Grouping rows at second level
grpRows->GetICells()->GroupRows(2, 8);
grpRows->GetICells()->GroupRows(14, 20);
grpRows->GetICells()->GroupRows(28, 30);
//Grouping rows at third level
grpRows->GetICells()->GroupRows(5, 7);
//Grouping columns at first level
grpCols->GetICells()->GroupColumns(0, 10);
grpCols->GetICells()->GroupColumns(12, 22);
grpCols->GetICells()->GroupColumns(24, 34);
//Grouping columns at second level
grpCols->GetICells()->GroupColumns(2, 8);
grpCols->GetICells()->GroupColumns(14, 20);
grpCols->GetICells()->GroupColumns(28, 30);
//Grouping columns at third level
grpCols->GetICells()->GroupColumns(5, 7);
//Save the output excel file
wb->Save(outputPath);
支持主题
Aspose.Cells for C++ API 现在支持使用和操作 Excel 应用程序提供的主题。
能够应用自定义主题颜色
以下代码段尝试使用自定义颜色创建新主题对于工作簿。
C++
//Create a workbook
intrusive_ptr<IWorkbook> wb = Factory::CreateIWorkbook();
//Create array of custom theme colors
intrusive_ptr<Array1D<Color*>> clrs = new Array1D<Color*>(12);
//Background1
clrs->SetValue(Color::GetRed(), 0);
//Text1
clrs->SetValue(Color::GetRed(), 1);
//Background2
clrs->SetValue(Color::GetRed(), 2);
//Text2
clrs->SetValue(Color::GetRed(), 3);
//Accent1
clrs->SetValue(Color::GetRed(), 4);
//Accent2
clrs->SetValue(Color::GetGreen(), 5);
//Accent3
clrs->SetValue(Color::GetGreen(), 6);
//Accent4
clrs->SetValue(Color::GetGreen(), 7);
//Accent5
clrs->SetValue(Color::GetGreen(), 8);
//Accent6
clrs->SetValue(Color::GetBlue(), 9);
//Hyperlink
clrs->SetValue(Color::GetBlue(), 10);
//Followed Hyperlink
clrs->SetValue(Color::GetBlue(), 11);
//Apply custom theme colors on workbook
wb->CustomTheme(new String("AnyTheme"), clrs);
//Save the workbook
wb->Save(outputPath);
支持主题颜色的操作
以下示例代码显示了如何读取和修改工作簿的主题颜色.示例代码加载现有电子表格，读取其主题颜色，即 Accent1-Accent6，并在保存电子表格之前修改颜色。
C++
//Load the sample excel file
intrusive_ptr<IWorkbook> wb = Factory::CreateIWorkbook(samplePath);
//Read these theme colors i.e. Accent1 till Accent6
intrusive_ptr<Color> clr_Accent1 = wb->GetThemeColor(ThemeColorType_Accent1);
intrusive_ptr<Color> clr_Accent2 = wb->GetThemeColor(ThemeColorType_Accent2);
intrusive_ptr<Color> clr_Accent3 = wb->GetThemeColor(ThemeColorType_Accent3);
intrusive_ptr<Color> clr_Accent4 = wb->GetThemeColor(ThemeColorType_Accent4);
intrusive_ptr<Color> clr_Accent5 = wb->GetThemeColor(ThemeColorType_Accent5);
intrusive_ptr<Color> clr_Accent6 = wb->GetThemeColor(ThemeColorType_Accent6);
//Print all of them. ffff00 means Yellow
printf("Accent1: %x\r\n", clr_Accent1->ToArgb());
printf("Accent2: %x\r\n", clr_Accent2->ToArgb());
printf("Accent3: %x\r\n", clr_Accent3->ToArgb());
printf("Accent4: %x\r\n", clr_Accent4->ToArgb());
printf("Accent5: %x\r\n", clr_Accent5->ToArgb());
printf("Accent6: %x\r\n", clr_Accent6->ToArgb());
//Set all of them to Red
wb->SetThemeColor(ThemeColorType_Accent1, Color::GetRed());
wb->SetThemeColor(ThemeColorType_Accent2, Color::GetRed());
wb->SetThemeColor(ThemeColorType_Accent3, Color::GetRed());
wb->SetThemeColor(ThemeColorType_Accent4, Color::GetRed());
wb->SetThemeColor(ThemeColorType_Accent5, Color::GetRed());
wb->SetThemeColor(ThemeColorType_Accent6, Color::GetRed());
//Reading one of them after modifying, it will be ff0000 which means Red
printf("\r\nReading one of them after modifying, it will be ff0000 which means Red\r\n\r\n");
clr_Accent6 = wb->GetThemeColor(ThemeColorType_Accent6);
printf("Accent6: %x\r\n", (clr_Accent6->ToArgb())&0xffffff);
//Save the output excel file
wb->Save(outputPath);
跨工作簿复制主题的能力
以下示例代码显示了如何将主题从一个工作簿复制到另一个，这可能有助于在多个电子表格上应用内置或自定义主题。
C++
//Read excel file that has Damask theme applied on it
intrusive_ptr<IWorkbook> damask = Factory::CreateIWorkbook(damaskPath);
//Read your sample excel file
intrusive_ptr<IWorkbook> wb = Factory::CreateIWorkbook(samplePath);
//Copy theme from source file
wb->CopyTheme(damask);
//Save the workbook in xlsx format
wb->Save(outputPath, SaveFormat_Xlsx);
重命名的 API
随着Aspose.Cells for C++ 16.12.0的发布，我们对一些方法进行了重命名以保持接口统一。所有重命名的 API 列表如下。