Convertir des graphiques en images

** Les graphiques ** sont visuellement attrayants et facilitent la comparaison, la détection de modèles et les tendances des données. Par exemple, plutôt que d’analyser plusieurs colonnes de chiffres de feuille de calcul, vous pouvez voir en un coup d’œil si les ventes baissent ou augmentent au fil des trimestres, ou comment les ventes réelles se comparent aux ventes projetées. Parfois, vous devez présenter le graphique dans vos applications ou pages web. Vous voudrez peut-être l’insérer dans un document Word, un fichier PDF, une présentation PowerPoint ou dans un autre scénario. Simplement, vous souhaitez que le graphique soit rendu sous forme d’image, de sorte que vous puissiez le coller dans vos applications facilement. Une image vaut la peine. Souvent, au cours du travail, il est nécessaire de présenter des informations statistiques et graphiques d’une manière facile à comprendre et facile à maintenir. Vous pourriez essayer l’automatisation d’Office mais cette dernière présente des inconvénients. Il y a plusieurs raisons et problèmes impliqués: par exemple, la sécurité, la stabilité, la scalabilité/rapidité, le prix, les fonctionnalités, etc. En bref, il existe de nombreuses raisons, la principale étant que Microsoft lui-même déconseille fortement l’automatisation d’Office à partir de solutions logicielles: Considérations pour l’automatisation côté serveur d’Office. Il y a une autre option que vous pouvez utiliser pour convertir un graphique Excel en une image en utilisant ** Aspose.Cells **.

Convertir le graphique en EMF

 //Instantiating a Workbook object

Workbook workbook = new Workbook();

//Adding a new worksheet to the Excel object

int sheetIndex = workbook.Worksheets.Add();

//Obtaining the reference of the newly added worksheet by

//passing its sheet index

Worksheet worksheet = workbook.Worksheets[sheetIndex];

//Adding a sample value to "A1" cell

worksheet.Cells["A1"].PutValue(50);

//Adding a sample value to "A2" cell

worksheet.Cells["A2"].PutValue(100);

//Adding a sample value to "A3" cell

worksheet.Cells["A3"].PutValue(150);

//Adding a sample value to "B1" cell

worksheet.Cells["B1"].PutValue(4);

//Adding a sample value to "B2" cell

worksheet.Cells["B2"].PutValue(20);

//Adding a sample value to "B3" cell

worksheet.Cells["B3"].PutValue(50);

//Adding a chart to the worksheet

int chartIndex = worksheet.Charts.Add(Aspose.Cells.Charts.ChartType.Column, 5, 0, 15, 5);

//Accessing the instance of the newly added chart

Aspose.Cells.Charts.Chart chart = worksheet.Charts[chartIndex];

//Adding Series Collection (chart data source) to the chart ranging from "A1" cell to "B3"

chart.NSeries.Add("A1:B3", true);

//Converting chart to image.

chart.ToImage(MyDir + "Chart to EMF Image.Emf", System.Drawing.Imaging.ImageFormat.Emf);

Convertir le graphique en BMP

 //Instantiating a Workbook object

Workbook workbook = new Workbook();

//Adding a new worksheet to the Excel object

int sheetIndex = workbook.Worksheets.Add();

//Obtaining the reference of the newly added worksheet by

//passing its sheet index

Worksheet worksheet = workbook.Worksheets[sheetIndex];

//Adding a sample value to "A1" cell

worksheet.Cells["A1"].PutValue(50);

//Adding a sample value to "A2" cell

worksheet.Cells["A2"].PutValue(100);

//Adding a sample value to "A3" cell

worksheet.Cells["A3"].PutValue(150);

//Adding a sample value to "B1" cell

worksheet.Cells["B1"].PutValue(4);

//Adding a sample value to "B2" cell

worksheet.Cells["B2"].PutValue(20);

//Adding a sample value to "B3" cell

worksheet.Cells["B3"].PutValue(50);

//Adding a chart to the worksheet

int chartIndex = worksheet.Charts.Add(Aspose.Cells.Charts.ChartType.Column, 5, 0, 15, 5);

//Accessing the instance of the newly added chart

Aspose.Cells.Charts.Chart chart = worksheet.Charts[chartIndex];

//Adding Series Collection (chart data source) to the chart ranging from "A1" cell to "B3"

chart.NSeries.Add("A1:B3", true);

//Converting chart to image.

chart.ToImage(MyDir + "Chart to BMP Image.Bmp", System.Drawing.Imaging.ImageFormat.Bmp);

Convertir le graphique en JPEG

 //Instantiating a Workbook object

Workbook workbook = new Workbook();

//Adding a new worksheet to the Excel object

int sheetIndex = workbook.Worksheets.Add();

//Obtaining the reference of the newly added worksheet by

//passing its sheet index

Worksheet worksheet = workbook.Worksheets[sheetIndex];

//Adding a sample value to "A1" cell

worksheet.Cells["A1"].PutValue(50);

//Adding a sample value to "A2" cell

worksheet.Cells["A2"].PutValue(100);

//Adding a sample value to "A3" cell

worksheet.Cells["A3"].PutValue(150);

//Adding a sample value to "B1" cell

worksheet.Cells["B1"].PutValue(4);

//Adding a sample value to "B2" cell

worksheet.Cells["B2"].PutValue(20);

//Adding a sample value to "B3" cell

worksheet.Cells["B3"].PutValue(50);

//Adding a chart to the worksheet

int chartIndex = worksheet.Charts.Add(Aspose.Cells.Charts.ChartType.Column, 5, 0, 15, 5);

//Accessing the instance of the newly added chart

Aspose.Cells.Charts.Chart chart = worksheet.Charts[chartIndex];

//Adding Series Collection (chart data source) to the chart ranging from "A1" cell to "B3"

chart.NSeries.Add("A1:B3", true);

//Converting chart to image.

chart.ToImage(MyDir + "Chart to JPEG Image.Jpeg", System.Drawing.Imaging.ImageFormat.Jpeg);

Convertir le graphique en PNG

 //Instantiating a Workbook object

Workbook workbook = new Workbook();

//Adding a new worksheet to the Excel object

int sheetIndex = workbook.Worksheets.Add();

//Obtaining the reference of the newly added worksheet by

//passing its sheet index

Worksheet worksheet = workbook.Worksheets[sheetIndex];

//Adding a sample value to "A1" cell

worksheet.Cells["A1"].PutValue(50);

//Adding a sample value to "A2" cell

worksheet.Cells["A2"].PutValue(100);

//Adding a sample value to "A3" cell

worksheet.Cells["A3"].PutValue(150);

//Adding a sample value to "B1" cell

worksheet.Cells["B1"].PutValue(4);

//Adding a sample value to "B2" cell

worksheet.Cells["B2"].PutValue(20);

//Adding a sample value to "B3" cell

worksheet.Cells["B3"].PutValue(50);

//Adding a chart to the worksheet

int chartIndex = worksheet.Charts.Add(Aspose.Cells.Charts.ChartType.Column, 5, 0, 15, 5);

//Accessing the instance of the newly added chart

Aspose.Cells.Charts.Chart chart = worksheet.Charts[chartIndex];

//Adding Series Collection (chart data source) to the chart ranging from "A1" cell to "B3"

chart.NSeries.Add("A1:B3", true);

//Converting chart to image.

chart.ToImage(MyDir + "Chart to PNG Image.Png", System.Drawing.Imaging.ImageFormat.Png);

Convertir le graphique en TIFF

 //Instantiating a Workbook object

Workbook workbook = new Workbook();

//Adding a new worksheet to the Excel object

int sheetIndex = workbook.Worksheets.Add();

//Obtaining the reference of the newly added worksheet by

//passing its sheet index

Worksheet worksheet = workbook.Worksheets[sheetIndex];

//Adding a sample value to "A1" cell

worksheet.Cells["A1"].PutValue(50);

//Adding a sample value to "A2" cell

worksheet.Cells["A2"].PutValue(100);

//Adding a sample value to "A3" cell

worksheet.Cells["A3"].PutValue(150);

//Adding a sample value to "B1" cell

worksheet.Cells["B1"].PutValue(4);

//Adding a sample value to "B2" cell

worksheet.Cells["B2"].PutValue(20);

//Adding a sample value to "B3" cell

worksheet.Cells["B3"].PutValue(50);

//Adding a chart to the worksheet

int chartIndex = worksheet.Charts.Add(Aspose.Cells.Charts.ChartType.Column, 5, 0, 15, 5);

//Accessing the instance of the newly added chart

Aspose.Cells.Charts.Chart chart = worksheet.Charts[chartIndex];

//Adding Series Collection (chart data source) to the chart ranging from "A1" cell to "B3"

chart.NSeries.Add("A1:B3", true);

//Converting chart to image.

chart.ToImage(MyDir + "Chart to Tiff Image.Tiff", System.Drawing.Imaging.ImageFormat.Tiff);

Convertir le graphique en TIFF multipage

 //Instantiating a Workbook object

Workbook workbook = new Workbook();

//Adding a new worksheet to the Excel object

int sheetIndex = workbook.Worksheets.Add();

//Obtaining the reference of the newly added worksheet by

//passing its sheet index

Worksheet worksheet = workbook.Worksheets[sheetIndex];

//Adding a sample value to "A1" cell

worksheet.Cells["A1"].PutValue(50);

//Adding a sample value to "A2" cell

worksheet.Cells["A2"].PutValue(100);

//Adding a sample value to "A3" cell

worksheet.Cells["A3"].PutValue(150);

//Adding a sample value to "B1" cell

worksheet.Cells["B1"].PutValue(4);

//Adding a sample value to "B2" cell

worksheet.Cells["B2"].PutValue(20);

//Adding a sample value to "B3" cell

worksheet.Cells["B3"].PutValue(50);

//Adding a chart to the worksheet

int chartIndex = worksheet.Charts.Add(Aspose.Cells.Charts.ChartType.Column, 5, 0, 15, 5);

//Accessing the instance of the newly added chart

Aspose.Cells.Charts.Chart chart = worksheet.Charts[chartIndex];

//Adding Series Collection (chart data source) to the chart ranging from "A1" cell to "B3"

chart.NSeries.Add("A1:B3", true);

ImageOrPrintOptions options = new ImageOrPrintOptions();

options.HorizontalResolution = 300;

options.VerticalResolution = 300;

options.TiffCompression = TiffCompression.CompressionLZW;

options.IsCellAutoFit = false;

options.ImageFormat = System.Drawing.Imaging.ImageFormat.Tiff;

options.OnePagePerSheet = true;

//Converting chart to image.

chart.ToImage(MyDir + "Chart to Tiff Image.tiff", options);

Télécharger le code source d’exemple