将艺术字水印添加到图表

您可以使用艺术字向电子表格添加特殊文本效果。例如，拉伸标题、装饰文本、使文本适合预设形状，或将受影响的文本作为水印应用到图表的绘图区域。艺术字成为一个对象，您可以在电子表格中移动或放置它以添加装饰。

以下示例显示如何将艺术字形状添加为图表绘图区域的水印。

以下示例显示如何将艺术字形状添加为现有图表绘图区域的水印。

// 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);

// Open the existing excel file.
Workbook workbook = new Workbook(dataDir + "sample.xlsx");

// Get the chart in the first worksheet.
Aspose.Cells.Charts.Chart chart = workbook.Worksheets[0].Charts[0];

// Add a WordArt watermark (shape) to the chart's plot area.
Aspose.Cells.Drawing.Shape wordart = chart.Shapes.AddTextEffectInChart(MsoPresetTextEffect.TextEffect2,
"CONFIDENTIAL", "Arial Black", 66, false, false, 1200, 500, 2000, 3000);

// Get the shape's fill format.
FillFormat wordArtFormat = wordart.Fill;

// Set the transparency.
wordArtFormat.Transparency = 0.9;

// Get the line format.
LineFormat lineFormat = wordart.Line;

// Set Line format to invisible.
lineFormat.Weight = 0.0;

// Save the excel file.
workbook.Save(dataDir + "output_out.xlsx");