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Spire.Presentation supports to set the default position (e.g. Outside End, Center, Inside End, Inside base etc.) of data labels through ChartDataLabel.Position property, it also supports to set custom position of data labels using "ChartDataLabel.X" and "ChartDataLabel.Y" properties. This article is going to elaborate how we can set default and custom position of data labels using Spire.Presentation.
Detail steps:
Step 1: Initialize a Presentation object 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: Add data label to the chart and set its id.
ChartDataLabel label1 = chart.Series[0].DataLabels.Add(); label1.ID = 0;
Step 4: Set the position of data label.
//Set the default position of data label. This position is relative to the data markers. //label1.Position = ChartDataLabelPosition.OutsideEnd; //Set custom position of data label. This position is relative to the default position. label1.X = 0.1f; label1.Y = -0.1f;
Step 5: Set the properties of data label.
//Set label value visible label1.LabelValueVisible = true; //Set legend key invisible label1.LegendKeyVisible = false; //Set category name invisible label1.CategoryNameVisible = false; //Set series name invisible label1.SeriesNameVisible = false; //Set Percentage invisible label1.PercentageVisible = false; //Set border style and fill style of data label label1.Line.FillType = Spire.Presentation.Drawing.FillFormatType.Solid; label1.Line.SolidFillColor.Color = Color.Blue; label1.Fill.FillType = Spire.Presentation.Drawing.FillFormatType.Solid; label1.Fill.SolidColor.Color = Color.Orange;
Step 6: Save the file.
ppt.SaveToFile(@"Output.pptx", FileFormat.Pptx2013);
Screenshot:
Default position (Outside End):
Custom position:
Full code:
using Spire.Presentation;
using Spire.Presentation.Charts;
using System.Drawing;
namespace Set_Position_of_Chart_Data_Label_in_PPT
{
class Program
{
static void Main(string[] args)
{
//Initialize a Presentation object
Presentation ppt = new Presentation();
//Load the PowerPoint file
ppt.LoadFromFile(@"Input.pptx");
//Get the chart
IChart chart = ppt.Slides[0].Shapes[0] as IChart;
//Add data label to chart and set its id
ChartDataLabel label1 = chart.Series[0].DataLabels.Add();
label1.ID = 0;
//Set the default position of data label. This position is relative to the data markers.
//label1.Position = ChartDataLabelPosition.OutsideEnd;
//Set custom position of data label. This position is relative to the default position.
label1.X = 0.1f;
label1.Y = -0.1f;
//Set label value visible
label1.LabelValueVisible = true;
//Set legend key invisible
label1.LegendKeyVisible = false;
//Set category name invisible
label1.CategoryNameVisible = false;
//Set series name invisible
label1.SeriesNameVisible = false;
//Set Percentage invisible
label1.PercentageVisible = false;
//Set border style and fill style of data label
label1.Line.FillType = Spire.Presentation.Drawing.FillFormatType.Solid;
label1.Line.SolidFillColor.Color = Color.Blue;
label1.Fill.FillType = Spire.Presentation.Drawing.FillFormatType.Solid;
label1.Fill.SolidColor.Color = Color.Orange;
//Save the file
ppt.SaveToFile(@"Output.pptx", FileFormat.Pptx2013);
}
}
}
We have already demonstrated how to use Spire.Presentation to insert HTML formatted text to PowerPoint slide. Now from Spire.Presentation 3.4.1, it supports to insert html (including text, image, audio and video) into presentation slides and each html tag will be added to the slide as a separate shape. The following code snippets demonstrate how to.
Step 1: Create an instance of Presentation class.
Presentation ppt = new Presentation();
Step 2: Get the shapes on the first slide.
ShapeList shapes = ppt.Slides[0].Shapes;
Step 3: Add contents to shape from HTML code, which includes text and image.
shapes.AddFromHtml("<html><div><p>First paragraph</p><p><img src='https://cdn.e-iceblue.com/Logo.jpg'/></p><p>Second paragraph </p></html>");
Step 4: Save the document to file.
ppt.SaveToFile("Result.pptx", FileFormat.Pptx2010);
Effective screenshot:
Full codes of how to insert HTML into the Presentation slides:
using Spire.Presentation;
using Spire.Presentation.Collections;
namespace InsertHTML
{
class Program
{
static void Main(string[] args)
{
Presentation ppt = new Presentation();
ShapeList shapes = ppt.Slides[0].Shapes;
shapes.AddFromHtml("First paragraph
Second paragraph
");
ppt.SaveToFile("Result.pptx", FileFormat.Pptx2010);
}
}
}
Using Spire.XLS, you're able to apply multiple fonts in a single cell in order to create rich-formatted text within the cell, you can also extract the formatted text from the cell(s) in an existing Excel document. The following code snippets will show you how to read rich text from an Excel cell in C# and VB.NET.
Step 1: Create a Workbook instance and load a sample Excel file.
Workbook wb = new Workbook(); wb.LoadFromFile(@"C:\Users\Administrator\Desktop\Sample.xlsx");
Step 2: Get the first worksheet.
Worksheet sheet= wb.Worksheets[0];
Step 3: Get the rtf text from the specified cell.
richTextBox1.Rtf = sheet.Range["B2"].RichText.RtfText;
Output:
Full Code:
private void btn_read_Click(object sender, EventArgs e)
{
Workbook wb = new Workbook();
wb.LoadFromFile(@"C:\Users\Administrator\Desktop\Sample.xlsx");
Worksheet sheet= wb.Worksheets[0];
richTextBox1.Rtf = sheet.Range["B2"].RichText.RtfText;
}
Private Sub btn_read_Click(ByVal sender As Object, ByVal e As EventArgs)
Dim wb As Workbook = New Workbook()
wb.LoadFromFile("C:\Users\Administrator\Desktop\Sample.xlsx")
Dim sheet As Worksheet = wb.Worksheets(0)
richTextBox1.Rtf = sheet.Range("B2").RichText.RtfText
End Sub
Hyperlinks can direct readers to a web page, a file, an E-mail address, or other place in the same PowerPoint file. A hyperlink can be added to a text, an image or a shape. In the previous article, we've illustrated how to add hyperlink to text, this article is going to demonstrate how to add hyperlink to an image in PowerPoint using Spire.Presentation.
Detail steps:
Step 1: Initialize an object of Presentation class and Load the PowerPoint file.
Presentation presentation = new Presentation();
presentation.LoadFromFile("Input.pptx");
Step 2: Get the first slide.
ISlide slide = presentation.Slides[0];
Step 3: Add image to slide.
RectangleF rect = new RectangleF(50, 300, 100, 100); IEmbedImage image = slide.Shapes.AppendEmbedImage(ShapeType.Rectangle, @"logo.png", rect);
Step 4: Add hyperlink to image.
ClickHyperlink hyperlink = new ClickHyperlink("https://www.e-iceblue.com");
image.Click = hyperlink;
Step 5: Save the file.
presentation.SaveToFile("ImageHyperLink.pptx", FileFormat.Pptx2010);
Screenshot:
Full code:
using Spire.Presentation;
using System.Drawing;
namespace InitializeHyperlink
{
class Program
{
static void Main(string[] args)
{
//Initialize an object of Presentation class
Presentation presentation = new Presentation();
//Load the PowerPoint file
presentation.LoadFromFile("test.pptx");
//Get the first slide
ISlide slide = presentation.Slides[0];
//Add image to slide
RectangleF rect = new RectangleF(50, 300, 100, 100);
IEmbedImage image = slide.Shapes.AppendEmbedImage(ShapeType.Rectangle, @"logo.png", rect);
//Add hyperlink to image
ClickHyperlink hyperlink = new ClickHyperlink("https://www.e-iceblue.com");
image.Click = hyperlink;
//Save the file
presentation.SaveToFile("ImageHyperLink.pptx", FileFormat.Pptx2010);
}
}
}
C#/VB.NET: Remove Text or Image Watermarks from Word Documents
2022-06-24 08:50:00 Written by KoohjiWatermarks can be added to Word documents to inform other people about the documents' ownership or status. Sometimes, you may want to get rid of an existing watermark in a Word document. This article will demonstrate how to remove watermarks from Word documents in C# and VB.NET using Spire.Doc for .NET.
Install Spire.Doc for .NET
To begin with, you need to add the DLL files included in the Spire.Doc for .NET package as references in your .NET project. The DLL files can be either downloaded from this link or installed via NuGet.
PM> Install-Package Spire.Doc
Remove Text or Image Watermarks from Word Documents in C# and VB.NET
You can remove the watermark of a Word document by setting the Document.Watermark property as null.
The following steps show you how to remove the watermark from a Word document:
- Initialize an instance of Document class.
- Load a Word document using Document.LoadFromFile() method.
- Remove the watermark from the document by setting the Document.Watermark property as null.
- Save the result document using Document.SaveToFile() method.
- C#
- VB.NET
using Spire.Doc;
namespace RemoveWatermark
{
class Program
{
static void Main(string[] args)
{
//Create a Document instance
Document doc = new Document();
//Load a Word document
doc.LoadFromFile("Sample.docx");
//Remove the watermark from the document
doc.Watermark = null;
//Save the result document
doc.SaveToFile("RemoveWatermark.docx", FileFormat.Docx2013);
}
}
}
Apply for a Temporary License
If you'd like to remove the evaluation message from the generated documents, or to get rid of the function limitations, please request a 30-day trial license for yourself.
With the help of Spire.Presentation, we can easily add SmartArt shape to the presentation slides. We can add a new node to the existing SmartArt shape to presentation slides and the following code example demonstrates the same.
Step 1: Create a new PowerPoint document and load the sample document from file.
Presentation presentation = new Presentation();
presentation.LoadFromFile("Sample.pptx");
Step 2: Get the SmartArt from the presentation slide.
ISmartArt sa = presentation.Slides[0].Shapes[1] as ISmartArt;
Step 3: Add a node.
ISmartArtNode node = sa.Nodes.AddNode();
Step 4: Add text and set the text style for the node.
node.TextFrame.Text = "NewStep"; node.TextFrame.TextRange.Fill.FillType = Spire.Presentation.Drawing.FillFormatType.Solid; node.TextFrame.TextRange.Fill.SolidColor.KnownColor = KnownColors.HotPink;
Step 5: Save the document to file.
presentation.SaveToFile("AddNode.pptx", FileFormat.Pptx2010);
Effective screenshot after adding a new node:
Full codes of adding a node to SmartArt:
using Spire.Presentation;
using Spire.Presentation.Diagrams;
namespace AddNote
{
class Program
{
static void Main(string[] args)
{
Presentation presentation = new Presentation();
presentation.LoadFromFile("Sample.pptx");
ISmartArt sa = presentation.Slides[0].Shapes[1] as ISmartArt;
ISmartArtNode node = sa.Nodes.AddNode();
node.TextFrame.Text = "NewStep";
node.TextFrame.TextRange.Fill.FillType = Spire.Presentation.Drawing.FillFormatType.Solid;
node.TextFrame.TextRange.Fill.SolidColor.KnownColor = KnownColors.HotPink;
presentation.SaveToFile("AddNode.pptx", FileFormat.Pptx2010);
}
}
}
When working with an Excel document, some blank rows or columns may appear due to the modification of data. Although having blank rows or columns in a worksheet isn't necessarily a bad thing, in most cases they are still undesirable. Furthermore, such blank rows or columns may cause errors if formulas are applied. To delete these blank rows or columns, you can simply select and delete them, but if there are a lot of blank rows and columns, deleting them manually is a very time-consuming task. In this article, you will learn how to programmatically delete blank rows and columns in an Excel worksheet using Spire.XLS for .NET.
Install Spire.XLS for .NET
To begin with, you need to add the DLL files included in the Spire.XLS for .NET package as references in your .NET project. The DLL files can be either downloaded from this link or installed via NuGet.
PM> Install-Package Spire.XLS
Delete Blank Rows and Columns in Excel
The detailed steps are as follows.
- Instantiate a Workbook object.
- Load a sample Excel file using Workbook.LoadFromFile() method.
- Get a specified worksheet using Workbook.Worksheets[] property.
- Loop through all used rows in the specified worksheet and determine whether the row is blank using XlsRange.IsBlank property.
- Delete the blank rows using Worksheet.DeleteRow() method.
- Loop through all used columns in the specified worksheet and determine whether the column is blank using XlsRange.IsBlank property.
- Delete the blank columns using Worksheet.DeleteColumn() method.
- Save the result file using Workbook.SaveToFile() method.
- C#
- VB.NET
using System.Linq;
using Spire.Xls;
namespace DeleteBlankRowsAndColumns
{
class Program
{
static void Main(string[] args)
{
//Instantiate a Workbook object
Workbook workbook = new Workbook();
//Load a sample Excel file
workbook.LoadFromFile("sample.xlsx");
//Get the first worksheet
Worksheet sheet = workbook.Worksheets[0];
//Delete blanks rows
for (int i = sheet.Rows.Count() - 1; i >= 0; i--)
{
if (sheet.Rows[i].IsBlank)
{
sheet.DeleteRow(i + 1); //Index parameter in DeleteRow method starts from 1
}
}
//Delete blank columns
for (int j = sheet.Columns.Count() - 1; j >= 0; j--)
{
if (sheet.Columns[j].IsBlank)
{
sheet.DeleteColumn(j + 1); //Index parameter in DeleteColumn method starts from 1
}
}
//Save the file
workbook.SaveToFile("DeleteBlankRowsAndColumns.xlsx", ExcelVersion.Version2013);
}
}
}
Apply for a Temporary License
If you'd like to remove the evaluation message from the generated documents, or to get rid of the function limitations, please request a 30-day trial license for yourself.
We already have the documentation introducing how to convert Word to EPUB. However, you may want to add a cover image to EPUB when creating an EPUB book from a Word document. The following code snippets will demonstrate the same.
Step 1: Create a Document instance and load a sample Word file.
Document doc = new Document();
doc.LoadFromFile("SampleWordFile.docx");
Step 2: Load a picture to DocPicture object.
DocPicture picture = new DocPicture(doc);
picture.LoadImage(Image.FromFile("CoverImage.jpg"));
Step 3: Add the picture to EPUB as cover image when creating EPUB from the Word document.
doc.SaveToEpub("output.epub", picture);
Output:
Full Code:
using Spire.Doc;
using Spire.Doc.Fields;
using System.Drawing;
namespace DOCTOEPUB
{
class Program
{
static void Main(string[] args)
{
Document doc = new Document();
doc.LoadFromFile("SampleWordFile.docx");
DocPicture picture = new DocPicture(doc);
picture.LoadImage(Image.FromFile("CoverImage.jpg"));
doc.SaveToEpub("output.epub", picture);
}
}
}
Imports Spire.Doc
Imports Spire.Doc.Fields
Imports System.Drawing
Namespace DOCTOEPUB
Class Program
Private Shared Sub Main(args As String())
Dim doc As New Document()
doc.LoadFromFile("SampleWordFile.docx")
Dim picture As New DocPicture(doc)
picture.LoadImage(Image.FromFile("CoverImage.jpg"))
doc.SaveToEpub("output.epub", picture)
End Sub
End Class
End Namespace
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();
}
}
}
