Making specific Text Boldefaced in a TextBox

Question

Hi I currently have a texbox that prints out info to the user when they press diffrent buttons. I was wondering if there was a way to make only some of my text bolded while the rest isnt.

Ive tried the following:

textBox1.FontWeight = FontWeights.UltraBold;
textBox1.Text. = ("Your Name: " );
TextBox1.FontWeight = FontWeights.Regular;
textBox1.Text += (nameVar);

Only problem is that using this way will either make everything bold or nothing. Is there a way to do this? Im using WPF project in C#

Any Comments or suggestions are appreciated. Thanks!

EDIT: So now im trying to do the RichText box that you all suggested but I cant seem to get anything to appear in it:

// Create a simple FlowDocument to serve as the content input for the construtor.
FlowDocument flowDoc = new FlowDocument(new Paragraph(new Run("Simple FlowDocument")));
// After this constructor is called, the new RichTextBox rtb will contain flowDoc.
RichTextBox rtb = new RichTextBox(flowDoc);

rtb is the name of my richtextbox i created in my wpf

Thanks

Hmmm,I don't know if this will help you but in S.W.F(System.Windows.Forms) namespace threre is the RichTextBox class that has the SelectionFont propeerty.I don't know if it will work with WPF though. — , Jun 19 '11 at 20:52

score 13 · Accepted Answer · answered Jun 19 '11 at 17:45

use a RichTextBox, below a method that i have wrote for this problem - hope it helps ;-)

/// <summary>
/// This method highlights the assigned text with the specified color.
/// </summary>
/// <param name="textToMark">The text to be marked.</param>
/// <param name="color">The new Backgroundcolor.</param>
/// <param name="richTextBox">The RichTextBox.</param>
/// <param name="startIndex">The zero-based starting caracter position.</param>
public static void ChangeTextcolor(string textToMark, Color color, RichTextBox richTextBox, int startIndex)
{
    if (startIndex < 0 || startIndex > textToMark.Length-1) startIndex = 0;

    System.Drawing.Font newFont = new Font("Verdana", 10f, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, 178, false);
    try
    {               
        foreach (string line in richTextBox.Lines)
        { 
            if (line.Contains(textToMark))
            {
                richTextBox.Select(startIndex, line.Length);
                richTextBox.SelectionBackColor = color;
            }
            startIndex += line.Length +1;
        }
    }
    catch
    { }
}

score 12 · Answer 2 · answered Jun 19 '11 at 17:30

12

You can use TextBlock with other TextBlocks or Runs inside:

<TextBlock>
    normal text
    <TextBlock FontWeight="Bold">bold text</TextBlock>
    more normal text
    <Run FontWeight="Bold">more bold text</Run>
</TextBlock>

answered Jun 19 '11 at 17:30

svick

236,525
50
385
514

1

How to programmatically do this? – digz6666 May 30 '13 at 08:28
2

@digz6666 By adding them to the `Inlines` collection. – svick May 30 '13 at 09:59

score 11 · Answer 3 · edited Jun 27 '17 at 11:59

You will need to use a RichTextBox to achieve this:

<RichTextBox Name="richTB">
  <FlowDocument>
    <Paragraph>
      <Run FontWeight="Bold">Your Name:</Run>
      <Run Text="{Binding NameProperty}"/>
    </Paragraph>
  </FlowDocument>
</RichTextBox>

But why would you want "Your Name" to be editable? Surely you would want it as a separate, readonly, label?

<StackPanel Orientation="Horizontal">
    <Label FontWeight="Bold">Your Name:</Label>
    <TextBox Text="{Binding NameProperty}"/>
</StackPanel>

score 4 · Answer 4 · answered Jun 19 '11 at 17:25

4

A regular TextBox only supports the all or nothing setting of such stylistic properties. You might want to look into RichTextBox, though, you can't just specify a set of values for a Text property in the way you have tried - you will need to work with a FlowDocument to construct your text body through the Document property.

For an overview of working with a FlowDocument, and some examples, give this a read.

answered Jun 19 '11 at 17:25

Grant Thomas

44,454
10
85
129

so im trying a basic flowDocument in a rich text box and it doesnt seem to do anything -- im using the example from msdna: http://msdn.microsoft.com/en-us/library/ms597536.aspx – Johnston Jun 19 '11 at 17:49

score 1 · Answer 5 · answered Jun 19 '11 at 17:25

1

Have a look at the RichTextBox Control it basically works the same as the TextBox but allows for more customization and takes, of course, Rich Text which allows for partial formatting..

answered Jun 19 '11 at 17:25

PedroC88

3,708
7
43
77

score 0 · Answer 6 · answered Nov 08 '16 at 14:34

Taking jwillmer's excellent example, I made some adjustments because it was coloring the entire error line for me:

    public static void ChangeTextcolor(string textToMark, Color color, RichTextBox richTextBox)
    {
        int startIndex = 0;

        string text = richTextBox.Text;
        startIndex = text.IndexOf(textToMark);

        System.Drawing.Font newFont = new Font("Verdana", 10f, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, 178, false);

        try
        {
            foreach (string line in richTextBox.Lines)
            {
                if (line.Contains(textToMark))
                {
                    richTextBox.Select(startIndex, textToMark.Length);
                    richTextBox.SelectionColor = color;
                    richTextBox.SelectionFont = newFont;
                }
            }
        }
        catch{ }
    }

Also, I added unique tags before and after the text to color to get the text, then removed them.

score 0 · Answer 7 · edited Jun 25 '18 at 08:27

jwillmer's answer had a few errors for me. These were solved by adding:

using System.Drawing;

and then changing the inputs to:

public static void ChangeTextcolor(string textToMark, System.Drawing.Color color, System.Windows.Forms.RichTextBox richTextBox, int startIndex)

This was because my code was looking for System.Windows.Controls.RichTextbox not Windows.Forums.RichTextBox. And System.Windows.Media.Color not System.Drawing.Color

Making specific Text Boldefaced in a TextBox

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