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A 100% stacked bar chart is a chart type designed to show the relative percentage of multiple data series in stacked bars, where the total of each stacked bar always equals 100%. This article will demonstrate how to use Spire.Presentation to create 100% stacked bar in PowerPoint in C#.
Step 1: Create a Presentation object.
Presentation presentation = new Presentation();
Step 2: Add a "Bar100PercentStacked" chart to the first slide.
presentation.SlideSize.Type = SlideSizeType.Screen16x9; SizeF slidesize = presentation.SlideSize.Size; var slide = presentation.Slides[0]; RectangleF rect = new RectangleF(20, 20, slidesize.Width - 40, slidesize.Height - 40); IChart chart = slide.Shapes.AppendChart(Spire.Presentation.Charts.ChartType.Bar100PercentStacked, rect);
Step 3: Write data to the chart data.
string[] columnlabels = { "Series 1", "Series 2", "Series 3" };
// Insert the column labels
String[] cols = columnlabels.ToArray();
for (Int32 c = 0; c < cols.Count(); ++c)
chart.ChartData[0, c + 1].Text = cols[c];
string[] rowlabels = { "Category 1", "Category 2", "Category 3" };
// Insert the row labels
String[] rows = rowlabels.ToArray();
for (Int32 r = 0; r < rows.Count(); ++r)
chart.ChartData[r + 1, 0].Text = rows[r];
double[,] values = new double[3, 3] { { 20.83233, 10.34323, -10.354667 }, { 10.23456, -12.23456, 23.34456 }, { 12.34345, -23.34343, -13.23232 }};
// Insert the values
double value = 0.0;
for (Int32 r = 0; r < rows.Count(); ++r)
{
for (Int32 c = 0; c < cols.Count(); ++c)
{
value = Math.Round(values[r, c], 2);
chart.ChartData[r + 1, c + 1].Value = value;
}
}
chart.Series.SeriesLabel = chart.ChartData[0, 1, 0, columnlabels.Count()];
chart.Categories.CategoryLabels = chart.ChartData[1, 0, rowlabels.Count(), 0];
chart.PrimaryCategoryAxis.Position = AxisPositionType.Left;
chart.SecondaryCategoryAxis.Position = AxisPositionType.Left;
chart.PrimaryCategoryAxis.TickLabelPosition = TickLabelPositionType.TickLabelPositionLow;
Step 4: Set the data, font and format for the series of each column.
for (Int32 c = 0; c < cols.Count(); ++c)
{
chart.Series[c].Values = chart.ChartData[1, c + 1, rowlabels.Count(), c + 1];
chart.Series[c].Fill.FillType = FillFormatType.Solid;
chart.Series[c].InvertIfNegative = false;
for (Int32 r = 0; r < rows.Count(); ++r)
{
var label = chart.Series[c].DataLabels.Add();
label.LabelValueVisible = true;
chart.Series[c].DataLabels[r].HasDataSource = false;
chart.Series[c].DataLabels[r].NumberFormat = "0#\\%";
chart.Series[c].DataLabels.TextProperties.Paragraphs[0].DefaultCharacterProperties.FontHeight = 12;
}
}
chart.Series[0].Fill.SolidColor.Color = Color.YellowGreen;
chart.Series[1].Fill.SolidColor.Color = Color.Red;
chart.Series[2].Fill.SolidColor.Color = Color.Green;
TextFont font = new TextFont("Tw Cen MT");
Step 5: Set the font and size for chartlegend.
for (int k = 0; k < chart.ChartLegend.EntryTextProperties.Length; k++)
{
chart.ChartLegend.EntryTextProperties[k].LatinFont = font;
chart.ChartLegend.EntryTextProperties[k].FontHeight = 20;
}
Step 6: Save the document to file.
presentation.SaveToFile("Sample.pptx", FileFormat.Pptx2010);
Effective screenshot of 100% stacked bar chart:
Full codes:
using Spire.Presentation;
using Spire.Presentation.Charts;
using Spire.Presentation.Drawing;
using System;
using System.Drawing;
using System.Linq;
namespace BarChart
{
class Program
{
static void Main(string[] args)
{
Presentation presentation = new Presentation();
presentation.SlideSize.Type = SlideSizeType.Screen16x9;
SizeF slidesize = presentation.SlideSize.Size;
var slide = presentation.Slides[0];
RectangleF rect = new RectangleF(20, 20, slidesize.Width - 40, slidesize.Height - 40);
IChart chart = slide.Shapes.AppendChart(Spire.Presentation.Charts.ChartType.Bar100PercentStacked, rect);
string[] columnlabels = { "Series 1", "Series 2", "Series 3" };
String[] cols = columnlabels.ToArray();
for (Int32 c = 0; c < cols.Count(); ++c)
chart.ChartData[0, c + 1].Text = cols[c];
string[] rowlabels = { "Category 1", "Category 2", "Category 3" };
String[] rows = rowlabels.ToArray();
for (Int32 r = 0; r < rows.Count(); ++r)
chart.ChartData[r + 1, 0].Text = rows[r];
double[,] values = new double[3, 3] { { 20.83233, 10.34323, -10.354667 }, { 10.23456, -12.23456, 23.34456 }, { 12.34345, -23.34343, -13.23232 } };
double value = 0.0;
for (Int32 r = 0; r < rows.Count(); ++r)
{
for (Int32 c = 0; c < cols.Count(); ++c)
{
value = Math.Round(values[r, c], 2);
chart.ChartData[r + 1, c + 1].Value = value;
}
}
chart.Series.SeriesLabel = chart.ChartData[0, 1, 0, columnlabels.Count()];
chart.Categories.CategoryLabels = chart.ChartData[1, 0, rowlabels.Count(), 0];
chart.PrimaryCategoryAxis.Position = AxisPositionType.Left;
chart.SecondaryCategoryAxis.Position = AxisPositionType.Left;
chart.PrimaryCategoryAxis.TickLabelPosition = TickLabelPositionType.TickLabelPositionLow;
for (Int32 c = 0; c < cols.Count(); ++c)
{
chart.Series[c].Values = chart.ChartData[1, c + 1, rowlabels.Count(), c + 1];
chart.Series[c].Fill.FillType = FillFormatType.Solid;
chart.Series[c].InvertIfNegative = false;
for (Int32 r = 0; r < rows.Count(); ++r)
{
var label = chart.Series[c].DataLabels.Add();
label.LabelValueVisible = true;
chart.Series[c].DataLabels[r].HasDataSource = false;
chart.Series[c].DataLabels[r].NumberFormat = "0#\\%";
chart.Series[c].DataLabels.TextProperties.Paragraphs[0].DefaultCharacterProperties.FontHeight = 12;
}
}
chart.Series[0].Fill.SolidColor.Color = Color.YellowGreen;
chart.Series[1].Fill.SolidColor.Color = Color.Red;
chart.Series[2].Fill.SolidColor.Color = Color.Green;
TextFont font = new TextFont("Tw Cen MT");
for (int k = 0; k < chart.ChartLegend.EntryTextProperties.Length; k++)
{
chart.ChartLegend.EntryTextProperties[k].LatinFont = font;
chart.ChartLegend.EntryTextProperties[k].FontHeight = 20;
}
presentation.SaveToFile("Sample.pptx", FileFormat.Pptx2010);
}
}
}
Spire.PDF supports to print a PDF in greyscale. This article is going to show you how to use Spire.PDF to accomplish this function.
Below is the example PDF file we used for demonstration:
Detail steps:
Step 1: Create a PdfDocument instance and load the PDF file.
PdfDocument pdf = new PdfDocument(); pdf.LoadFromFile(@"Stories.pdf");
Step 2: Set the PdfPrintSettings.Color property to false.
pdf.PrintSettings.Color = false;
Step 3: Print the document.
pdf.Print();
Screenshot after printing to xps:
Full code:
using Spire.Pdf;
namespace Print_PDF_in_Black_and_White
{
class Program
{
static void Main(string[] args)
{
PdfDocument pdf = new PdfDocument();
pdf.LoadFromFile(@"Stories.pdf");
pdf.PrintSettings.Color = false;
pdf.Print();
}
}
}
Shadows make your shapes or pictures especially with transparent background pop out of your slide. They make flat 2 dimensional graphics look like 3 dimensional graphics. This article will show you how we can apply shadow effects to shapes and pictures in PowerPoint using Spire.Presentation.
Apply Shadow Effect to Shape
using Spire.Presentation;
using Spire.Presentation.Drawing;
using System.Drawing;
namespace ApplyShadoweffect
{
class Program
{
static void Main(string[] args)
{
{
//Create a Presentation object and get the first slide.
Presentation ppt = new Presentation();
ISlide slide = ppt.Slides[0];
//Add a shape to slide.
RectangleF rect = new RectangleF(30, 80, 300, 120);
IAutoShape shape = slide.Shapes.AppendShape(ShapeType.Rectangle, rect);
shape.Fill.FillType = FillFormatType.Solid;
shape.Fill.SolidColor.Color = Color.LightBlue;
shape.Line.FillType = FillFormatType.None;
shape.TextFrame.Text = "This demo shows how to apply shadow effect to shape.";
shape.TextFrame.TextRange.Fill.FillType = FillFormatType.Solid;
shape.TextFrame.TextRange.Fill.SolidColor.Color = Color.Black;
//Create an inner shadow effect through InnerShadowEffect object.
InnerShadowEffect innerShadow = new InnerShadowEffect();
innerShadow.BlurRadius = 20;
innerShadow.Direction = 0;
innerShadow.Distance = 0;
innerShadow.ColorFormat.Color = Color.Black;
//Apply the shadow effect to shape.
shape.EffectDag.InnerShadowEffect = innerShadow;
//Save to file.
ppt.SaveToFile("ShadowOnShape.pptx", FileFormat.Pptx2010);
}
}
}
}
Apply Shadow Effect to Picture
using Spire.Presentation;
using Spire.Presentation.Drawing;
using System.Drawing;
namespace ApplyShadoweffect
{
class Program
{
static void Main(string[] args)
{
{
//Create a Presentation object and get the first slide.
Presentation ppt = new Presentation();
ISlide slide = ppt.Slides[0];
//Get the picture path.
string imagePath = "dinosaur.png";
Image image = Image.FromFile(imagePath);
float width = (float)image.Width / 3;
float height = (float)image.Height / 3;
//Add a shape to slide and fill the shape with picture.
RectangleF rect = new RectangleF(80, 80, width, height);
IAutoShape shape = slide.Shapes.AppendShape(ShapeType.Rectangle, rect);
shape.Fill.FillType = FillFormatType.Picture;
shape.Fill.PictureFill.Picture.Url = imagePath;
shape.Fill.PictureFill.FillType = PictureFillType.Stretch;
shape.Line.FillType = FillFormatType.None;
//Choose a preset shadow effect.
PresetShadow presetShadow = new PresetShadow();
presetShadow.Preset = PresetShadowValue.BackLeftPerspective;
presetShadow.ColorFormat.Color = Color.LightGray;
//Apply the shadow effect to shape.
shape.EffectDag.PresetShadowEffect = presetShadow;
//Save to file.
ppt.SaveToFile("ShadowOnPicture.pptx", FileFormat.Pptx2010);
}
}
}
}
Convert the PDF to word, HTML, SVG, XPS and save them to stream
2018-03-13 08:11:24 Written by KoohjiThis article we will demonstrate how to convert the PDF pages to HTML, Word, SVG, XPS, PDF and save them to stream by calling the method PdfDocument.SaveToStream() offered by Spire.PDF. And starts from Spire.PDF version 4.3, it newly supports to convert the defined range of PDF pages and save them to stream.
Save the PDF to stream
Step 1: Create a new PdfDocument instance and load the sample document from file.
PdfDocument pdf = new PdfDocument();
pdf.LoadFromFile("Sample.pdf");
Step 2: Save the document to stream.
MemoryStream ms=new MemoryStream (); pdf.SaveToStream(ms);
Save the PDF to stream and defined the file format to HTML, Word, SVG, XPS and PDF
Step 1: Create a new PdfDocument instance and load the sample document from file.
PdfDocument pdf = new PdfDocument();
pdf.LoadFromFile("Sample.pdf");
Step 2: Save the document to stream and use FileFormat format to define the format.
MemoryStream ms=new MemoryStream (); pdf.SaveToStream(ms, FileFormat.HTML);
Convert the defined range of PDF pages to HTML, word, SVG, XPS and save them to stream
Step 1: Create a new PdfDocument instance and load the sample document from file.
PdfDocument pdf = new PdfDocument();
pdf.LoadFromFile("Sample.pdf");
Step 2: Only save some PDF pages to stream by using pdf.SaveToStream(int startIndex, int endIndex, FileFormat format) method; and FileFormat.PDF is not supported.
pdf.SaveToStream(1, 2, FileFormat.SVG);
Full codes of save PDF to stream:
using Spire.Pdf;
using System.IO;
namespace SavePDFToStream
{
class Program
{
static void Main(string[] args)
{
PdfDocument pdf = new PdfDocument();
pdf.LoadFromFile("Sample.pdf");
MemoryStream ms = new MemoryStream();
pdf.SaveToStream(ms);
pdf.SaveToStream(ms, FileFormat.HTML);
pdf.SaveToStream(1, 2, FileFormat.SVG);
}
}
}
Delete Legend and Specific Legend Entries from Excel Chart in C#
2018-03-12 07:55:52 Written by KoohjiA legend is displayed in the chart area by default. However it can be removed from the chart. With Spire.XLS, we can delete the whole legend as well as specific legend entries from Excel chart. This article is going to demonstrate how we can use Spire.XLS to accomplish this function.
Below screenshot shows the Excel chart we used for demonstration:
Delete the whole legend
using Spire.Xls;
namespace DeleteLegend
{
class Program
{
static void Main(string[] args)
{
//Create a Workbook instance
Workbook workbook = new Workbook();
//Load the Excel file
workbook.LoadFromFile("sample.xlsx");
//Get the first worksheet
Worksheet sheet = workbook.Worksheets[0];
//Get the chart
Chart chart = sheet.Charts[0];
//Delete legend from the chart
chart.Legend.Delete();
//Save the file
workbook.SaveToFile("DeleteLegend.xlsx", ExcelVersion.Version2013);
}
}
}
Screenshot:
Delete specific legend entries
using Spire.Xls;
namespace DeleteLegend
{
class Program
{
static void Main(string[] args)
{
//Create a Workbook instance
Workbook workbook = new Workbook();
//Load the Excel file
workbook.LoadFromFile("sample.xlsx");
//Get the first worksheet
Worksheet sheet = workbook.Worksheets[0];
//Get the chart
Chart chart = sheet.Charts[0];
//Delete the first and the second legend entries from the chart
chart.Legend.LegendEntries[0].Delete();
chart.Legend.LegendEntries[1].Delete();
//Save the file
workbook.SaveToFile("DeleteLegendEntries.xlsx", ExcelVersion.Version2013);
}
}
}
Screenshot:
Multi-level category chart is a chart type that has both main category and subcategory labels. This type of chart is useful when you have figures for items that belong to different categories. In this article, you will learn how to create a multi-level category chart in Excel using Spire.XLS with C# and VB.NET.
Step 1: Create a Workbook instance and get the first worksheet.
Workbook wb = new Workbook(); Worksheet sheet = wb.Worksheets[0];
Step 2: Write data to cells.
sheet.Range["A1"].Text = "Main Category"; sheet.Range["A2"].Text = "Fruit"; sheet.Range["A6"].Text = "Vegies"; sheet.Range["B1"].Text = "Sub Category"; sheet.Range["B2"].Text = "Bananas"; sheet.Range["B3"].Text = "Oranges"; sheet.Range["B4"].Text = "Pears"; sheet.Range["B5"].Text = "Grapes"; sheet.Range["B6"].Text = "Carrots"; sheet.Range["B7"].Text = "Potatoes"; sheet.Range["B8"].Text = "Celery"; sheet.Range["B9"].Text = "Onions"; sheet.Range["C1"].Text = "Value"; sheet.Range["C2"].Value = "52"; sheet.Range["C3"].Value = "65"; sheet.Range["C4"].Value = "50"; sheet.Range["C5"].Value = "45"; sheet.Range["C6"].Value = "64"; sheet.Range["C7"].Value = "62"; sheet.Range["C8"].Value = "89"; sheet.Range["C9"].Value = "57";
Step 3: Vertically merge cells from A2 to A5, A6 to A9.
sheet.Range["A2:A5"].Merge(); sheet.Range["A6:A9"].Merge();
Step 4: Add a clustered bar chart to worksheet.
Chart chart = sheet.Charts.Add(ExcelChartType.BarClustered); chart.ChartTitle = "Value"; chart.PlotArea.Fill.FillType = ShapeFillType.NoFill; chart.Legend.Delete();
Step 5: Set the data source of series data.
chart.DataRange = sheet.Range["C2:C9"]; chart.SeriesDataFromRange = false;
Step 6: Set the data source of category labels.
ChartSerie serie = chart.Series[0]; serie.CategoryLabels = sheet.Range["A2:B9"];
Step 7: Show multi-level category labels.
chart.PrimaryCategoryAxis.MultiLevelLable = true;
Step 8: Save the file.
wb.SaveToFile("output.xlsx", ExcelVersion.Version2013);
Output:
Full Code:
using Spire.Xls;
using Spire.Xls.Charts;
namespace CreateMutilLevelChart
{
class Program
{
static void Main(string[] args)
{
Workbook wb = new Workbook();
Worksheet sheet = wb.Worksheets[0];
sheet.Range["A1"].Text = "Main Category";
sheet.Range["A2"].Text = "Fruit";
sheet.Range["A6"].Text = "Vegies";
sheet.Range["B1"].Text = "Sub Category";
sheet.Range["B2"].Text = "Bananas";
sheet.Range["B3"].Text = "Oranges";
sheet.Range["B4"].Text = "Pears";
sheet.Range["B5"].Text = "Grapes";
sheet.Range["B6"].Text = "Carrots";
sheet.Range["B7"].Text = "Potatoes";
sheet.Range["B8"].Text = "Celery";
sheet.Range["B9"].Text = "Onions";
sheet.Range["C1"].Text = "Value";
sheet.Range["C2"].Value = "52";
sheet.Range["C3"].Value = "65";
sheet.Range["C4"].Value = "50";
sheet.Range["C5"].Value = "45";
sheet.Range["C6"].Value = "64";
sheet.Range["C7"].Value = "62";
sheet.Range["C8"].Value = "89";
sheet.Range["C9"].Value = "57";
sheet.Range["A2:A5"].Merge();
sheet.Range["A6:A9"].Merge();
sheet.AutoFitColumn(1);
sheet.AutoFitColumn(2);
Chart chart = sheet.Charts.Add(ExcelChartType.BarClustered);
chart.ChartTitle = "Value";
chart.PlotArea.Fill.FillType = ShapeFillType.NoFill;
chart.Legend.Delete();
chart.LeftColumn = 5;
chart.TopRow = 1;
chart.RightColumn = 14;
chart.DataRange = sheet.Range["C2:C9"];
chart.SeriesDataFromRange = false;
ChartSerie serie = chart.Series[0];
serie.CategoryLabels = sheet.Range["A2:B9"];
chart.PrimaryCategoryAxis.MultiLevelLable = true;
wb.SaveToFile("output.xlsx", ExcelVersion.Version2013);
}
}
}
Imports Spire.Xls
Imports Spire.Xls.Charts
Namespace CreateMutilLevelChart
Class Program
Private Shared Sub Main(args As String())
Dim wb As New Workbook()
Dim sheet As Worksheet = wb.Worksheets(0)
sheet.Range("A1").Text = "Main Category"
sheet.Range("A2").Text = "Fruit"
sheet.Range("A6").Text = "Vegies"
sheet.Range("B1").Text = "Sub Category"
sheet.Range("B2").Text = "Bananas"
sheet.Range("B3").Text = "Oranges"
sheet.Range("B4").Text = "Pears"
sheet.Range("B5").Text = "Grapes"
sheet.Range("B6").Text = "Carrots"
sheet.Range("B7").Text = "Potatoes"
sheet.Range("B8").Text = "Celery"
sheet.Range("B9").Text = "Onions"
sheet.Range("C1").Text = "Value"
sheet.Range("C2").Value = "52"
sheet.Range("C3").Value = "65"
sheet.Range("C4").Value = "50"
sheet.Range("C5").Value = "45"
sheet.Range("C6").Value = "64"
sheet.Range("C7").Value = "62"
sheet.Range("C8").Value = "89"
sheet.Range("C9").Value = "57"
sheet.Range("A2:A5").Merge()
sheet.Range("A6:A9").Merge()
sheet.AutoFitColumn(1)
sheet.AutoFitColumn(2)
Dim chart As Chart = sheet.Charts.Add(ExcelChartType.BarClustered)
chart.ChartTitle = "Value"
chart.PlotArea.Fill.FillType = ShapeFillType.NoFill
chart.Legend.Delete()
chart.LeftColumn = 5
chart.TopRow = 1
chart.RightColumn = 14
chart.DataRange = sheet.Range("C2:C9")
chart.SeriesDataFromRange = False
Dim serie As ChartSerie = chart.Series(0)
serie.CategoryLabels = sheet.Range("A2:B9")
chart.PrimaryCategoryAxis.MultiLevelLable = True
wb.SaveToFile("output.xlsx", ExcelVersion.Version2013)
End Sub
End Class
End Namespace
With Spire.Doc, we can copy the content from one word document to another word document in C#. When we need to generate a large amount of documents from a single document, clone the document will be much easier. The clone method speeds up the generation of the word documents and developers only need one single line of code to get the copy of the word document.
Now we will show the code snippet of how to clone a word document in C#.
Step 1: Create a new instance of Document and load the document from file.
Document doc = new Document();
doc.LoadFromFile("Sample.docx",FileFormat.Docx2010);
Step 2: Clone the word document.
doc.Clone();
Step 3: Save the document to file.
doc.SaveToFile("Cloneword.docx", FileFormat.Docx2010);
Effective screenshot of clone the word document:
Full codes of clone a word document:
using Spire.Doc;
namespace CloneWord
{
class Program
{
static void Main(string[] args)
{
Document doc = new Document();
doc.LoadFromFile("Sample.docx", FileFormat.Docx2010);
doc.Clone();
doc.SaveToFile("Cloneword.docx", FileFormat.Docx2010);
}
}
}
When creating chart, the legend appears by default. If we just need the chart series rather than the legend, we can delete the legend entries after creating the chart. Spire.Presentation supports to delete legend entries from chart by using ChartLegend.DeleteEntry method. This article is going to demonstrate how we can use Spire.Presentation to accomplish this function.
Below screenshot shows the example PowerPoint file which contains 3 chart legend entries:
Detail steps:
Step 1: Initialize an object of Presentation class and load the PowerPoint file.
Presentation ppt = new Presentation();
ppt.LoadFromFile("Input.pptx");
Step 2: Get the chart.
IChart chart = ppt.Slides[0].Shapes[0] as IChart;
Step 3: Delete the first and the second legend entries from the chart.
chart.ChartLegend.DeleteEntry(0); chart.ChartLegend.DeleteEntry(1);
Step 4: Save the file.
ppt.SaveToFile("Output.pptx", FileFormat.Pptx2010);
Screenshot:
Full code:
using Spire.Presentation;
using Spire.Presentation.Charts;
namespace Delete_chart_legend_entries_in_PPT
{
class Program
{
static void Main(string[] args)
{
Presentation ppt = new Presentation();
ppt.LoadFromFile("Input.pptx");
IChart chart = ppt.Slides[0].Shapes[0] as IChart;
chart.ChartLegend.DeleteEntry(0);
chart.ChartLegend.DeleteEntry(1);
ppt.SaveToFile("Output.pptx", FileFormat.Pptx2010);
}
}
}
Group Two-Level Axis Labels in a Chart in PowerPoint in C#, VB.NET
2018-03-07 06:41:56 Written by KoohjiSometimes, you may have a chart that contains two levels of horizontal axis labels, as shown in the following screenshot, and you need to group the labels by fruit and vegies. This article will show you how to group the category axis labels using Spire.Presentation.
Step 1: Create a Presentation instance and load the sample PowerPoint file.
Presentation ppt = new Presentation();
ppt.LoadFromFile("chart.pptx");
Step 2: Get the chart.
IChart chart = ppt.Slides[0].Shapes[0] as IChart;
Step 3: Get the category axis from the chart.
IChartAxis chartAxis = chart.PrimaryCategoryAxis;
Step 4: Determine if the axis has multilevel labels, if yes, group the axis labels that have the same first-level label.
if(chartAxis.HasMultiLvlLbl)
{
chartAxis.IsMergeSameLabel = true;
}
Step 5: Save the file.
ppt.SaveToFile("result.pptx", FileFormat.Pptx2010);
Output:
Full Code:
using Spire.Presentation;
using Spire.Presentation.Charts;
namespace GroupLabel
{
class Program
{
static void Main(string[] args)
{
Presentation ppt = new Presentation();
ppt.LoadFromFile("chart.pptx");
IChart chart = ppt.Slides[0].Shapes[0] as IChart;
IChartAxis chartAxis = chart.PrimaryCategoryAxis;
if (chartAxis.HasMultiLvlLbl)
{
//group labels
chartAxis.IsMergeSameLabel = true;
}
ppt.SaveToFile("result.pptx", FileFormat.Pptx2010);
}
}
}
Imports Spire.Presentation
Imports Spire.Presentation.Charts
Namespace GroupLabel
Class Program
Private Shared Sub Main(args As String())
Dim ppt As New Presentation()
ppt.LoadFromFile("chart.pptx")
Dim chart As IChart = TryCast(ppt.Slides(0).Shapes(0), IChart)
Dim chartAxis As IChartAxis = chart.PrimaryCategoryAxis
If chartAxis.HasMultiLvlLbl Then
'group labels
chartAxis.IsMergeSameLabel = True
End If
ppt.SaveToFile("result.pptx", FileFormat.Pptx2010)
End Sub
End Class
End Namespace
Sometimes, you may want to convert Excel sheet to a high-resolution image, especially when the Excel report contains graphs or pictures. This article will show you how to set image resolution when saving Excel sheet to JPG using Spire.XLS.
Step 1: Create a custom function that you can use to reset the image resolution.
private static Bitmap ResetResolution(Metafile mf, float resolution)
{
int width = (int)(mf.Width * resolution / mf.HorizontalResolution);
int height = (int)(mf.Height * resolution / mf.VerticalResolution);
Bitmap bmp = new Bitmap(width, height);
bmp.SetResolution(resolution, resolution);
Graphics g = Graphics.FromImage(bmp);
g.DrawImage(mf, 0, 0);
g.Dispose();
return bmp;
}
Step 2: Create a workbook instance and load the sample Excel file.
Workbook workbook = new Workbook();
workbook.LoadFromFile("Chart.xlsx",ExcelVersion.Version2013);
Step 3: Get the worksheet you want to convert.
Worksheet worksheet = workbook.Worksheets[0];
Step 4: Convert the worksheet to EMF stream.
MemoryStream ms = new MemoryStream(); worksheet.ToEMFStream(ms, 1, 1, worksheet.LastRow, worksheet.LastColumn);
Step 5: Create an image from the EMF stream, and call ResetResolution to reset the resolution for the image.
Image image = Image.FromStream(ms); Bitmap images = ResetResolution(image as Metafile, 300);
Step 6: Save the image in JPG file format.
images.Save("Result.jpg", ImageFormat.Jpeg);
Output:
Full Code:
using Spire.Xls;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
namespace Convert
{
class Program
{
static void Main(string[] args)
{
Workbook workbook = new Workbook();
workbook.LoadFromFile("Chart.xlsx", ExcelVersion.Version2013);
Worksheet worksheet = workbook.Worksheets[0];
using (MemoryStream ms = new MemoryStream())
{
worksheet.ToEMFStream(ms, 1, 1, worksheet.LastRow, worksheet.LastColumn);
Image image = Image.FromStream(ms);
Bitmap images = ResetResolution(image as Metafile, 300);
images.Save("Result.jpg", ImageFormat.Jpeg);
}
}
private static Bitmap ResetResolution(Metafile mf, float resolution)
{
int width = (int)(mf.Width * resolution / mf.HorizontalResolution);
int height = (int)(mf.Height * resolution / mf.VerticalResolution);
Bitmap bmp = new Bitmap(width, height);
bmp.SetResolution(resolution, resolution);
Graphics g = Graphics.FromImage(bmp);
g.DrawImage(mf, 0, 0);
g.Dispose();
return bmp;
}
}
}
Imports Spire.Xls
Imports System.Drawing
Imports System.Drawing.Imaging
Imports System.IO
Namespace Convert
Class Program
Private Shared Sub Main(args As String())
Dim workbook As New Workbook()
workbook.LoadFromFile("Chart.xlsx", ExcelVersion.Version2013)
Dim worksheet As Worksheet = workbook.Worksheets(0)
Using ms As New MemoryStream()
worksheet.ToEMFStream(ms, 1, 1, worksheet.LastRow, worksheet.LastColumn)
Dim image__1 As Image = Image.FromStream(ms)
Dim images As Bitmap = ResetResolution(TryCast(image__1, Metafile), 300)
images.Save("Result.jpg", ImageFormat.Jpeg)
End Using
End Sub
Private Shared Function ResetResolution(mf As Metafile, resolution As Single) As Bitmap
Dim width As Integer = CInt(mf.Width * resolution / mf.HorizontalResolution)
Dim height As Integer = CInt(mf.Height * resolution / mf.VerticalResolution)
Dim bmp As New Bitmap(width, height)
bmp.SetResolution(resolution, resolution)
Dim g As Graphics = Graphics.FromImage(bmp)
g.DrawImage(mf, 0, 0)
g.Dispose()
Return bmp
End Function
End Class
End Namespace
