Manage Table

A table in PowerPoint is an efficient way of displaying and portraying information. The information in a grid of cells (arranged in rows and columns) is straightforward and easy to understand.

Aspose.Slides provides the Table class, ITable interface, Cell class, ICell interface, and other types to allow you to create, update, and manage tables in all kinds of presentations.

Create Table from Scratch

1. Create an instance of the Presentation class.
2. Get a slide’s reference through its index.
3. Define an array of columnWidth.
4. Define an array of rowHeight.
5. Add an ITable object to the slide through the AddTable() method.
6. Iterate through each ICell to apply formatting to the top, bottom, right, and left borders.
7. Merge the first two cells of the table’s first row.
8. Access an ICell’s TextFrame.
9. Add some text to the TextFrame.
10. Save the modified presentation.

This C++ code shows you how to create a table in a presentation:

// Instantiates a Presentation class that represents a PPTX file
auto pres = System::MakeObject<Presentation>();

// Accesses first slide
auto sld = pres->get_Slides()->idx_get(0);

// Defines columns with widths and rows with heights
auto dblCols = System::MakeArray<double>({ 50, 50, 50 });
auto dblRows = System::MakeArray<double>({ 50, 30, 30, 30, 30 });

// Adds a table shape to the slide
auto tbl = sld->get_Shapes()->AddTable(100.0f, 50.0f, dblCols, dblRows);

// Sets the border format for each cell
for (int32_t row = 0; row < tbl->get_Rows()->get_Count(); row++)
{
    for (int32_t cell = 0; cell < tbl->get_Rows()->idx_get(row)->get_Count(); cell++)
    {
        auto cellFormat = tbl->get_Rows()->idx_get(row)->idx_get(cell)->get_CellFormat();

        cellFormat->get_BorderTop()->get_FillFormat()->set_FillType(FillType::Solid);
        cellFormat->get_BorderTop()->get_FillFormat()->get_SolidFillColor()->set_Color(Color::get_Red());
        cellFormat->get_BorderTop()->set_Width(5);

        cellFormat->get_BorderBottom()->get_FillFormat()->set_FillType((FillType::Solid));
        cellFormat->get_BorderBottom()->get_FillFormat()->get_SolidFillColor()->set_Color(Color::get_Red());
        cellFormat->get_BorderBottom()->set_Width(5);

        cellFormat->get_BorderLeft()->get_FillFormat()->set_FillType(FillType::Solid);
        cellFormat->get_BorderLeft()->get_FillFormat()->get_SolidFillColor()->set_Color(Color::get_Red());
        cellFormat->get_BorderLeft()->set_Width(5);

        cellFormat->get_BorderRight()->get_FillFormat()->set_FillType(FillType::Solid);
        cellFormat->get_BorderRight()->get_FillFormat()->get_SolidFillColor()->set_Color(Color::get_Red());
        cellFormat->get_BorderRight()->set_Width(5);
    }
}
// Merges cells 1 & 2 of row 1
tbl->MergeCells(tbl->get_Rows()->idx_get(0)->idx_get(0), tbl->get_Rows()->idx_get(1)->idx_get(1), false);

// Adds some text to the merged cell
tbl->get_Rows()->idx_get(0)->idx_get(0)->get_TextFrame()->set_Text(u"Merged Cells");

// Saves the presentation to Disk
pres->Save(u"table.pptx", SaveFormat::Pptx);

Numbering in Standard Table

In a standard table, the numeration of cells is straightforward and zero-based. The first cell in a table is indexed as 0,0 (column 0, row 0).

For example, the cells in a table with 4 columns and 4 rows are numbered this way:

(0, 0)	(1, 0)	(2, 0)	(3, 0)
(0, 1)	(1, 1)	(2, 1)	(3, 1)
(0, 2)	(1, 2)	(2, 2)	(3, 2)
(0, 3)	(1, 3)	(2, 3)	(3, 3)

This C++ code shows you how to specify the numbering for cells in a table:

// Instantiates a Presentation class that represents a PPTX file
auto pres = System::MakeObject<Presentation>();

// Accesses the first slide
auto sld = pres->get_Slides()->idx_get(0);

// Defines columns with widths and rows with heights
auto dblCols = System::MakeArray<double>({ 70, 70, 70, 70 });
auto dblRows = System::MakeArray<double>({ 70, 70, 70, 70 });

// Adds a table shape to slide
auto tbl = sld->get_Shapes()->AddTable(100.0f, 50.0f, dblCols, dblRows);

// Sets the border format for each cell
for (const auto& row : tbl->get_Rows())
{
    for (const auto& cell : row)
    {
        auto cellFormat = cell->get_CellFormat();
        cellFormat->get_BorderTop()->get_FillFormat()->set_FillType(FillType::Solid);
        cellFormat->get_BorderTop()->get_FillFormat()->get_SolidFillColor()->set_Color(Color::get_Red());
        cellFormat->get_BorderTop()->set_Width(5);

        cellFormat->get_BorderBottom()->get_FillFormat()->set_FillType(FillType::Solid);
        cellFormat->get_BorderBottom()->get_FillFormat()->get_SolidFillColor()->set_Color(Color::get_Red());
        cellFormat->get_BorderBottom()->set_Width(5);

        cellFormat->get_BorderLeft()->get_FillFormat()->set_FillType(FillType::Solid);
        cellFormat->get_BorderLeft()->get_FillFormat()->get_SolidFillColor()->set_Color(Color::get_Red());
        cellFormat->get_BorderLeft()->set_Width(5);

        cellFormat->get_BorderRight()->get_FillFormat()->set_FillType(FillType::Solid);
        cellFormat->get_BorderRight()->get_FillFormat()->get_SolidFillColor()->set_Color(Color::get_Red());
        cellFormat->get_BorderRight()->set_Width(5);
    }
}

// Saves presentation to disk
pres->Save(u"StandardTables_out.pptx", SaveFormat::Pptx);

Access Existing Table

1. Create an instance of the Presentation class.

2. Get a reference to the slide containing the table through its index.

3. Create an ITable object and set it to null.

4. Iterate through all IShape objects till the table is found.

   If you suspect the slide you are dealing with contains a single table, you can simply check all the shapes it contains. When a shape is identified as a table, you can typecast it as a Table object. But if the slide you are dealing with contains several tables, then you are better off searching for the table you need through its set_AlternativeText().

5. Use the ITable object to work with the table. In the example below, we added a new row to the table.

6. Save the modified presentation.

This C++ code shows you how to access and work with an existing table:

// Instantiates a Presentation class that represents a PPTX file
auto pres = System::MakeObject<Presentation>(u"UpdateExistingTable.pptx");

// Accesses the first slide
auto sld = pres->get_Slides()->idx_get(0);

// Initializes null Table
System::SharedPtr<ITable> tbl;

// Iterates through the shapes and sets a reference to the table found
for (const auto& shp : System::IterateOver(sld->get_Shapes()))
{
    if (System::ObjectExt::Is<ITable>(shp))
    {
        tbl = System::ExplicitCast<ITable>(shp);
    }
}

// Sets the text for the first column of the second row
tbl->idx_get(0, 1)->get_TextFrame()->set_Text(u"New");

// Saves the modified presentation to disk
pres->Save(u"table1_out.pptx", SaveFormat::Pptx);

Align Text in Table

1. Create an instance of the Presentation class.
2. Get a slide’s reference through its index.
3. Add an ITable object to the slide.
4. Access an ITextFrame object from the table.
5. Access the ITextFrame IParagraph.
6. Align the text vertically.
7. Save the modified presentation.

This C++ code shows you how to align the text in a table:

// Creates an instance of the Presentation class
auto presentation = System::MakeObject<Presentation>();

// Gets the first slide 
auto slide = presentation->get_Slides()->idx_get(0);

// Defines columns with widths and rows with heights
auto dblCols = System::MakeArray<double>({ 120, 120, 120, 120 });
auto dblRows = System::MakeArray<double>({ 100, 100, 100, 100 });

// Adds the table shape to the slide
auto tbl = slide->get_Shapes()->AddTable(100.0f, 50.0f, dblCols, dblRows);
tbl->idx_get(1, 0)->get_TextFrame()->set_Text(u"10");
tbl->idx_get(2, 0)->get_TextFrame()->set_Text(u"20");
tbl->idx_get(3, 0)->get_TextFrame()->set_Text(u"30");

// Accesses the text frame
auto txtFrame = tbl->idx_get(0, 0)->get_TextFrame();

// Creates the Paragraph object for the text frame
auto paragraph = txtFrame->get_Paragraphs()->idx_get(0);

// Creates the Portion object for paragraph
auto portion = paragraph->get_Portions()->idx_get(0);
portion->set_Text(u"Text here");
portion->get_PortionFormat()->get_FillFormat()->set_FillType(FillType::Solid);
portion->get_PortionFormat()->get_FillFormat()->get_SolidFillColor()->set_Color(Color::get_Black());

// Aligns the text vertically
auto cell = tbl->idx_get(0, 0);
cell->set_TextAnchorType(TextAnchorType::Center);
cell->set_TextVerticalType(TextVerticalType::Vertical270);

// Saves the Presentation to disk
presentation->Save(u"Vertical_Align_Text_out.pptx", SaveFormat::Pptx);

Set Text Formatting on Table Level

1. Create an instance of the Presentation class.
2. Get a slide’s reference through its index.
3. Access an ITable object from the Slide.
4. Set the set_FontHeight() for the text.
5. Set the set_Alignment() and set_MarginRight().
6. Set the set_TextVerticalType().
7. Save the modified presentation.

This C++ code shows you how to apply your preferred formatting options to the text in a table:

// Creates an instance of the Presentation class
auto presentation = System::MakeObject<Presentation>();
auto slide = presentation->get_Slides()->idx_get(0);

// Let's assume that the first shape on the first slide is a table
auto someTable = System::AsCast<ITable>(presentation->get_Slides()->idx_get(0)->get_Shapes()->idx_get(0));

// Sets the table cells' font height
auto portionFormat = System::MakeObject<PortionFormat>();
portionFormat->set_FontHeight(25.0f);
someTable->SetTextFormat(portionFormat);

// Sets the table cells' text alignment and right margin in one call
auto paragraphFormat = System::MakeObject<ParagraphFormat>();
paragraphFormat->set_Alignment(TextAlignment::Right);
paragraphFormat->set_MarginRight(20.0f);
someTable->SetTextFormat(paragraphFormat);

// Sets the table cells' text vertical type
auto textFrameFormat = System::MakeObject<TextFrameFormat>();
textFrameFormat->set_TextVerticalType(TextVerticalType::Vertical);
someTable->SetTextFormat(textFrameFormat);

presentation->Save(u"result.pptx", SaveFormat::Pptx);

Get Table Style Properties

Aspose.Slides allows you to retrieve the style properties for a table so that you can use those details for another table or somewhere else. This C++ code shows you how to get the style properties from a table preset style:

auto pres = System::MakeObject<Presentation>();
auto shapes = pres->get_Slide(0)->get_Shapes();
auto table = System::ExplicitCast<ITable>(shapes->AddTable(10, 10, System::MakeArray<double>({100, 150}), System::MakeArray<double>({5, 5, 5})));

table->set_StylePreset(TableStylePreset::DarkStyle1);
pres->Save(u"table.pptx", SaveFormat::Pptx);

Lock Aspect Ratio of Table

The aspect ratio of a geometric shape is the ratio of its sizes in different dimensions. Aspose.Slides provided the AspectRatioLocked() property to allow you to lock the aspect ratio setting for tables and other shapes.

This C++ code shows you how to lock the aspect ratio for a table:

auto pres = System::MakeObject<Presentation>(u"pres.pptx");
auto table = System::ExplicitCast<ITable>(pres->get_Slides()->idx_get(0)->get_Shapes()->idx_get(0));

Console::WriteLine(u"Lock aspect ratio set: {0}", table->get_GraphicalObjectLock()->get_AspectRatioLocked());


table->get_GraphicalObjectLock()->set_AspectRatioLocked(!table->get_GraphicalObjectLock()->get_AspectRatioLocked());

Console::WriteLine(u"Lock aspect ratio set: {0}", table->get_GraphicalObjectLock()->get_AspectRatioLocked());

pres->Save(u"pres-out.pptx", SaveFormat::Pptx);