Develop Reference

Draw text to image change bug [duplicate]

This question already has answers here:
Drawing aligned strings by formatting double values
(3 answers)
How to draw a table using System.Drawing
(1 answer)
Graphics.DrawString() & leading padding spaces for Proportional Font
(1 answer)
How to create control that draws a table in panel
(1 answer)
Closed 1 year ago.
I want to create program that draws text on image. For that purpose I used this method:
private static Image DrawText(String text, Font font, Color textColor, Color backColor)
{
//first, create a dummy bitmap just to get a graphics object
Image img = new Bitmap(1, 1);
Graphics drawing = Graphics.FromImage(img);
//measure the string to see how big the image needs to be
SizeF textSize = drawing.MeasureString(text, font);
//free up the dummy image and old graphics object
img.Dispose();
drawing.Dispose();
//create a new image of the right size
img = new Bitmap((int)textSize.Width, (int)textSize.Height);
drawing = Graphics.FromImage(img);
//paint the background
drawing.Clear(backColor);
//create a brush for the text
Brush textBrush = new SolidBrush(textColor);
drawing.DrawString(text, font, textBrush, 0, 0);
drawing.Save();
textBrush.Dispose();
drawing.Dispose();
return img;
}
My problem is that I want to draw table in the image, so the table should look like:
I used this library for drawing table
And code looks like this method from above
var table = new ConsoleTable("one", "two", "three")
.AddRow("random text';", "random text", "random text")
.Configure(o => o.NumberAlignment = Alignment.Left)
.ToString();
DrawText(table, new Font("Verdana", 20), Color.Black, Color.White);
And i got this kind of image
Rows are really changed and it doesn't look like table above. I think method DrawText changed something but I don't know what exactly it is? So I need help. Sorry for my bad English

If you don't need Verdana (which isn't a monospaced font), you should be able to fix this by slightly altering your call to DrawText like so:
DrawText(table, new Font(FontFamily.GenericMonospace, 20), Color.Black, Color.White);
I'm not actually super familiar with working with fonts, so using FontFamily.GenericMonospace is sort of my best guess. You should be able to use others though. Wikipedia has a list of them.

C# GraphicsPath adding text with opacity

I'm using the following code to add text to a image:
private void AddText(Graphics graphics, FontDetails fontDetails, Rectangle destination)
{
using (GraphicsPath graphicsPath = new GraphicsPath())
{
graphicsPath.AddString(
"My sample text",
fontDetails.FontFamily,
fontDetails.FontStyle,
fontDetails.FontEmHeight,
destination,
fontDetails.FontStringFormat
);
graphics.FillPath(new SolidBrush(FontColour), graphicsPath);
}
}
This is working perfectly. I want to be able to apply an opacity effect to the text, but cannot seem to find an option to do this.
Any help would be greatly appreciated.

I think you can add an opacity value to the solid brush if you construct it like this:
SolidBrush semiTransBrush = new SolidBrush(Color.FromArgb(128, 0, 0, 255));
graphics.FillPath(semiTransBrush, graphicsPath);
When you fill a shape, you must pass a Brush object to one of the fill methods of the Graphics class. The one parameter of the SolidBrush constructor is a Color object. To fill an opaque shape, set the alpha component of the color to 255. To fill a semitransparent shape, set the alpha component to any value from 1 through 254.
https://msdn.microsoft.com/en-us/library/5s2dwfx1(v=vs.110).aspx

How can i change in Graphics DrawString the text font size?

I'm using this method to draw the text on form1:
private bool DrawText(bool draw, string texttodraw)
{
Graphics g = this.CreateGraphics();
SizeF size = g.MeasureString(texttodraw, SystemFonts.DefaultFont,14);
g.DrawString(texttodraw, Font, Brushes.Red, pictureBox1.Location.X + (pictureBox1.Width / 2) - (size.Width / 2),
pictureBox1.Location.Y - 30);
return draw;
}
I tried to set Width to 14 on the SizeF size lline but it didn't change the dize and the only thing it did is moving a bit the text from it's location .
How can i change the font size of the text, and also to keep the perspective(if this is the right word to use) of the text location ?
This is how it look like when not using the Width 14 at all the text is in the center above the pictureBox1. I want that when i change the text size it will be kept to be in the center like it is now.
The text is in Red and it's in hebrew in this case.

Try using a bigger font:
using (Font bigFont = new Font(SystemFonts.DefaultFont.FontFamily, 14, FontStyle.Regular)) {
SizeF size = g.MeasureString(texttodraw, bigFont, 14);
g.DrawString(texttodraw, bigFont, Brushes.Red, pictureBox1.Location.X + (pictureBox1.Width / 2) - (size.Width / 2),
pictureBox1.Location.Y - 30);
}
Do avoid using CreateGraphics, it's only a temporary drawing that will get erased by overlapping windows or minimizing the form. It will also cause flicker. Use the graphics object from the paint event and invalidate the control to update the painting.
Also, do favor using TextRenderer.DrawText and TextRenderer.MeasureText for your text renderings. DrawString should primarily be used for printing to paper.

I think the best way is to use StringFormat object to center-align the text either horizontally or vertically or both using the 5th overload of Graphics.DrawString() funciton:
You need to provide a Rectangle objet and alignment is done with respect to this object.
StringFormat sf=new StringFormat();
sf.LineAlignment = StringAlignment.Center;//center-align vertically
sf.Alignment = StringAlignment.Center; //center-align horizontally

private void printDocument_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{
Font drawFont = new Font("Arial Black", 9);
e.Graphics.DrawString(nic.Text, drawFont, Brushes.Maroon, 174, 12);

How to have text with bold and normal words for same label?

I need to have text for my label control which as both bold and normal character.
How can I do that? any idea or pointers??
Thanks.
EDIT:
It is Winform, and I am sorry but I have no idea, I am using TWO label for this but I want to use only one.
Is it possible.!!

I have done something like,
using (Graphics g = Graphics.FromImage(pictureBox1.Image))
{
Font drawFont = new Font("Arial", 12);
Font drawFontBold = new Font("Arial", 12, FontStyle.Bold);
SolidBrush drawBrush = new SolidBrush(Color.Black);
// find the width of single char using selected fonts
float CharWidth = g.MeasureString("Y", drawFont).Width;
// draw first part of string
g.DrawString("this is normal", drawFont, drawBrush, new RectangleF(350f, 250f, 647, 200));
// now get the total width of words drawn using above settings
float widthFirst = ("this is normal").Length() * CharWidth;
// the width of first part string to start of second part to avoid overlay
g.DrawString(" and this is bold text", drawFontBold, drawBrush, new RectangleF(350f + widthFirst, 250f, 647, 200));
}
Hope it helps..!!!
NOTE
You can use Label Paint event and Draw the way I have done for lable

I think answer can be relevant for you:
https://stackoverflow.com/a/2527744/3835956
Use a styled RichTextBox instead of a label, select the text and set it to bold.

Is there a way to programmatically add text to a System.Drawing.Image?

I have a System.Drawing.Image that I display with System.Drawing.Graphics DrawImage function. The image is a police car, and I would like to draw a unit number on top of the police car. Is there an easy way to do this?

You can use the DrawString method to write text out onto an image.
// Create string to draw.
String drawString = "Sample Text";
// Create font and brush.
Font drawFont = new Font("Arial", 16);
SolidBrush drawBrush = new SolidBrush(Color.Black);
// Create point for upper-left corner of drawing.
PointF drawPoint = new PointF(150.0F, 150.0F);
// Draw string to screen.
e.Graphics.DrawString(drawString, drawFont, drawBrush, drawPoint);

It's not clear if you are trying to add the text to the image or just display text on the image:
To the image:
using (Graphics g = Graphics.FromImage(yourImage))
{
g.DrawString(...);
}
or On the image:
e.Graphics.DrawImage(...);
e.Graphics.DrawString(...);