大家都知道，水印是電子表格中比較常見的應用。所以，強大的Aspose.Cells自然也有添加水印的功能啦，那么，這一功能具體是如何實現的呢？

下面，就由慧都小編給出一個實例，供大家學習使用：

本例中，我們的目的就是為Excel文件中的一個圖表添加藝術字背景水印。

首先，讓我們來看一下添加水印前的效果圖：

接下來，我們輸入相應的代碼：

[C#]

 //Instantiate a new workbook.
//Open the existing excel file.
Workbook workbook = new Workbook("e:\\test\

\Report_Test1.xls");
//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.
Aspose.Cells.Drawing.MsoFillFormat wordArtFormat =

wordart.FillFormat;
//Set the transparency.
wordArtFormat.Transparency = 0.9;
//Get the line format and make it invisible.
Aspose.Cells.Drawing.MsoLineFormat lineFormat =

wordart.LineFormat;
lineFormat.IsVisible = false;
//Save the excel file.
workbook.Save("e:\\test\\outReport_Test1.xls");
 

[VB]

 'Instantiate a new workbook.
'Open the existing excel file.
Dim workbook As New Workbook("e:\test\Report_Test1.xls")
'Get the chart in the first worksheet.
Dim chart As Aspose.Cells.Charts.Chart =

workbook.Worksheets(0).Charts(0)
'Add a WordArt watermark (shape) to the chart's plot area.
Dim wordart As Aspose.Cells.Drawing.Shape =

chart.Shapes.AddTextEffectInChart

(MsoPresetTextEffect.TextEffect2, ";CONFIDENTIAL", "Arial

Black", 66, False, False, 1200, 500, 2000, 3000)
'Get the shape's fill format.
Dim wordArtFormat As Aspose.Cells.Drawing.MsoFillFormat =

wordart.FillFormat
'Set the transparency.
wordArtFormat.Transparency = 0.9
'Get the line format and make it invisible.
Dim lineFormat As Aspose.Cells.Drawing.MsoLineFormat =

wordart.LineFormat
lineFormat.IsVisible = False
'Save the excel file.
workbook.Save("e:\test\outReport_Test1.xls")

最后，讓我們來看一下代碼運行后的效果圖吧：