Définir une image comme fond de graphique
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Aspose.Cells vous permet de définir un dégradé, une texture, un motif ou une image comme effets de remplissage pour différents objets, tels que la zone de traçage, la zone de graphique ou la boîte de légende d’un graphique. Ce document montre comment ajouter une image à l’arrière-plan d’un graphique.
Pour ce faire, Aspose.Cells fournit la propriété Chart.PlotArea.Area.FillFormat.ImageData. L’exemple de code suivant démontre l’utilisation de la propriété Chart.PlotArea.Area.FillFormat.ImageData pour définir une image comme remplissage d’arrière-plan dans le graphique.
Code C# pour définir une image comme remplissage d’arrière-plan dans le graphique
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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); | |
// Create a new Workbook. | |
Workbook workbook = new Workbook(); | |
// Get the first worksheet. | |
Worksheet sheet = workbook.Worksheets[0]; | |
// Set the name of worksheet | |
sheet.Name = "Data"; | |
// Get the cells collection in the sheet. | |
Cells cells = workbook.Worksheets[0].Cells; | |
// Put some values into a cells of the Data sheet. | |
cells["A1"].PutValue("Region"); | |
cells["A2"].PutValue("France"); | |
cells["A3"].PutValue("Germany"); | |
cells["A4"].PutValue("England"); | |
cells["A5"].PutValue("Sweden"); | |
cells["A6"].PutValue("Italy"); | |
cells["A7"].PutValue("Spain"); | |
cells["A8"].PutValue("Portugal"); | |
cells["B1"].PutValue("Sale"); | |
cells["B2"].PutValue(70000); | |
cells["B3"].PutValue(55000); | |
cells["B4"].PutValue(30000); | |
cells["B5"].PutValue(40000); | |
cells["B6"].PutValue(35000); | |
cells["B7"].PutValue(32000); | |
cells["B8"].PutValue(10000); | |
// Add a chart sheet. | |
int sheetIndex = workbook.Worksheets.Add(SheetType.Chart); | |
sheet = workbook.Worksheets[sheetIndex]; | |
// Set the name of worksheet | |
sheet.Name = "Chart"; | |
// Create chart | |
int chartIndex = 0; | |
chartIndex = sheet.Charts.Add(Aspose.Cells.Charts.ChartType.Column, 1, 1, 25, 10); | |
Aspose.Cells.Charts.Chart chart = sheet.Charts[chartIndex]; | |
// Set some properties of chart plot area. | |
// To set a picture as fill format and make the border invisible. | |
FileStream fs = File.OpenRead(dataDir+ "aspose.png"); | |
byte[] data = new byte[fs.Length]; | |
fs.Read(data, 0, data.Length); | |
chart.PlotArea.Area.FillFormat.ImageData = data; | |
chart.PlotArea.Border.IsVisible = false; | |
// Set properties of chart title | |
chart.Title.Text = "Sales By Region"; | |
chart.Title.Font.Color = Color.Blue; | |
chart.Title.Font.IsBold = true; | |
chart.Title.Font.Size = 12; | |
// Set properties of nseries | |
chart.NSeries.Add("Data!B2:B8", true); | |
chart.NSeries.CategoryData = "Data!A2:A8"; | |
chart.NSeries.IsColorVaried = true; | |
// Set the Legend. | |
Aspose.Cells.Charts.Legend legend = chart.Legend; | |
legend.Position = Aspose.Cells.Charts.LegendPositionType.Top; | |
// Save the excel file | |
workbook.Save(dataDir + "column_chart_out.xls"); |