Bind color to Rectangle in WPF - WPF Discussion Boards

3-Jul-08 4:38

You can use Color.FromArgb to generate the appropriate values.

ColorBrush.Color.FromArgb(_color.ToArgb());

I'm doing this off the top of my head, so you may need to tweak it slightly but this should work.

Deja View - the feeling that you've seen this post before.

Re: System.Drawing.Color to System.Windows.Media.Brush

KBou3-Jul-08 4:44

KBou

3-Jul-08 4:44

The System.Windows.Media.Brush ColorBrush doesn't contain anything like Color or FromArgb. Neither does the BrushConverter.

Re: System.Drawing.Color to System.Windows.Media.Brush

Insincere Dave3-Jul-08 5:19

Insincere Dave

3-Jul-08 5:19

Colours and Brushes are two different things. As mentioned above you can access the components of the colour individually to swap between a System.Drawing and a WPF color.

using (System.Windows.Forms.ColorDialog d = new System.Windows.Forms.ColorDialog())
{
    d.ShowDialog();
    System.Drawing.Color c = d.Color;
    Background = new System.Windows.Media.SolidColorBrush(System.Windows.Media.Color.FromArgb(c.A,c.R,c.G,c.B));
}

Re: System.Drawing.Color to System.Windows.Media.Brush

KBou3-Jul-08 5:01

KBou

3-Jul-08 5:01

I Found It.

System.Windows.Media.BrushConverter bc = new System.Windows.Media.BrushConverter();
if (_color.IsNamedColor)
{
    ColorBrush = (System.Windows.Media.Brush)bc.ConvertFromString(_color.Name);
}
else
{
    ColorBrush = (System.Windows.Media.Brush)bc.ConvertFromString("#"+_color.Name);
}

When it is not a NamedColor it returns for example ffffff80. When you add a # it recognizes and converts it.

Thanks Anyway

Re: System.Drawing.Color to System.Windows.Media.Brush [modified]

appxdev17-Feb-11 15:26

appxdev

17-Feb-11 15:26

System.Drawing.Color c1 = new System.Drawing.Color();
        c1 = System.Drawing.Color.FromName(mycolorString);
        System.Windows.Media.Color c2 = new Color();
        c2 = Color.FromArgb(c1.A, c1.R, c1.G, c1.B);

modified on Saturday, April 16, 2011 11:21 AM

Bind color to Rectangle in WPF

ezazazel2-Jul-08 11:06

ezazazel

2-Jul-08 11:06

Hy! I'm trying to bind a given color to a rectangle in WPF... by now without success.
Here's my not working) approach:

XAML:

            <Rectangle Fill="{Binding Path=color1}" 
                       Margin="10,10,10,10" 
                       Height="Auto" Width="Auto"
                       Grid.Column="0" Grid.Row="0"
                       />      
...

C# Code:

public Window2()
        {
            InitializeComponent();
            bgColors.SetColors(Colors.Green, Colors.Green, Colors.Red, Colors.Red);
            MainDockPanel.DataContext = bgColors;           
        }

and

internal class BGColors : INotifyPropertyChanged
    {
        private Color Color1;
        public Color color1
        {
            get { return Color1; }
            set { Color1 = value;
            NotifyPropertyChanged("color1");
            }
        }

        private Color Color2;
        public Color color2
        {
            get { return Color2; }
            set { Color2 = value;
            NotifyPropertyChanged("color2");
            }
        }

        private Color Color3;
        public Color color3
        {
            get { return Color3; }
            set
            {
                Color1 = value;
                NotifyPropertyChanged("color3");
            }
        }

        private Color Color4;
        public Color color4
        {
            get { return Color4; }
            set
            {
                Color2 = value;
                NotifyPropertyChanged("color4");
            }
        }

        public void SetColors(Color color1, Color color2, Color color3, Color color4)
        {
            this.color1 = color1;
            this.color2 = color2;
            this.color3 = color3;
            this.color4 = color4;
        }

        private void NotifyPropertyChanged(string p)
        {
            PropertyChangedEventHandler handler = PropertyChanged;

            if (handler != null)
            {
                handler(this, new PropertyChangedEventArgs(p));
            }
        }

        public override string ToString()
        {
            return color1.ToString();
        }
  
        #region INotifyPropertyChanged Members

        public event PropertyChangedEventHandler PropertyChanged;

        #endregion
    }

Binding the values as string to a label works perfectly, but no Colors can be assigned.
Help would be appreciated.
Thx in advance

Gideon Engelberth2-Jul-08 11:59

Gideon Engelberth

2-Jul-08 11:59

When a data binding is not working, the first place to look is the Immediate Window. The message I got when trying your code is:

Cannot create default converter to perform 'one-way' conversions between types 'System.Windows.Media.Color' and 'System.Windows.Media.Brush'.

Either you will need to change the BGColors class to give brushes, or you will need to write a converter.

User 223706-Jul-08 16:40

User 22370

6-Jul-08 16:40

Also - make sure that the Color type you are binding is of the right kind. You can't bind a System.Drawing.Color to a WPF element - you need to use a System.Windows.Media.Color type. I got caught by this not so long ago and it had exactly the symptoms you describe - no problem reported however the color was ignored.

Melbourne. Australia.

modified 10-Jul-19 21:02pm.

ezazazel7-Jul-08 6:25

ezazazel

7-Jul-08 6:25

Thx for your help!

How can we convert Brushes.* to the hexadecimal numbers in WPF ?

Sudarsan Srinivasan14-Mar-09 1:45

Sudarsan Srinivasan

14-Mar-09 1:45

Fill property of a Rectangle takes in a string. Try giving the name of color1 instead of the Color itself. It will work. Smile | :)

Mohammad Dayyan2-Jul-08 9:49

Re: How can we convert Brushes.* to the hexadecimal numbers in WPF ?

2-Jul-08 9:49

Hi there.

I want to convert Brushes.* to the hexadecimal numbers to using in HTML's files.
For example I'd like to convert Brushes.Black to the #000000 or Brushes.White to the #FFFFFF.

Can you help me ?

Freshman

Pete O'Hanlon2-Jul-08 10:06

2-Jul-08 10:06

Well - you can always get this using the Colors.A, Colors.R, Colors.G and Colors.B from the brush colour.

Deja View - the feeling that you've seen this post before.

Re: How can we convert Brushes.* to the hexadecimal numbers in WPF ?

Mohammad Dayyan2-Jul-08 10:17

Re: How can we convert Brushes.* to the hexadecimal numbers in WPF ?

2-Jul-08 10:17

Thank you.
Can you write a sample code (Please)
I'm new D'Oh! | :doh:

Freshman

Pete O'Hanlon2-Jul-08 10:27

2-Jul-08 10:27

Thinking about it, the simplest way is to do this:

SolidColorBrush brush = Brushes.Aqua ;
string color = string.Format("#{0}",brush.ToString().Substring(3));

The brush includes an alpha component at the start, so you need to remove it from the text. This means you need to do a substring on the ToString() which returns the full ARGB version of the colour.

Deja View - the feeling that you've seen this post before.

Re: How can we convert Brushes.* to the hexadecimal numbers in WPF ?

Mohammad Dayyan2-Jul-08 10:51

TreeListView Drag and Drop

2-Jul-08 10:51

Nice

You're expert in WPF.

Thank you very much Pete

Freshman

anci12-Jul-08 1:19

anci1

2-Jul-08 1:19

I have the Implementaion for Displaying treeListView but, don't know how to do DragDrop in it??

Re: TreeListView Drag and Drop

Pete O'Hanlon2-Jul-08 3:36

2-Jul-08 3:36

Josh has an excellent article here[^] that can be easily adapted to treeview drag/drop.

Deja View - the feeling that you've seen this post before.

Set context sensitive help in wpf

Member 46946271-Jul-08 22:22

Member 4694627

1-Jul-08 22:22

hi,

how we can set F1 key for image button to open chm file in wpf

Re: Set context sensitive help in wpf

Member 46946271-Jul-08 23:07

Member 4694627

1-Jul-08 23:07

I have got it.
Add Window.CommandBindings in xaml file.
Add tag CommandBinding Command='ApplicationCommands.Help' Executed='OnClickContents' as the child of </Window.CommandBindings>
We can write code under event handler for event Executed.

How can we get richTextbox 's text in WPF ?

Mohammad Dayyan1-Jul-08 19:10

Re: How can we get richTextbox 's text in WPF ?

1-Jul-08 19:10

Hello friends.
I want to get richTextbox's text in wpf.
How can I do it ?

Something like this : richTextBoxText.Text

Freshman

modified on Wednesday, July 2, 2008 1:26 AM

Member 46946271-Jul-08 22:39

Member 4694627

1-Jul-08 22:39

I have created flowdocument name="flowData" as the child of rich texrt box and paragraph as the child of Flow document in the xaml file.
In the cs file I have created TextRange object and passed the flowdocument.ContentStart and flowdocument.ContentEnd
eg: TextRange documentRange = new TextRange( flowData.ContentStart, flowData.ContentEnd );
then documentRange.Text returns the data entered in rich text box.

Re: How can we get richTextbox 's text in WPF ?

Mohammad Dayyan2-Jul-08 2:57

How can we convert a string to the Brush ?

2-Jul-08 2:57

Did you mean :

RichTextBox rtb = richTextBoxText as RichTextBox;
TextRange tr = new TextRange(rtb.Document.ContentStart,rtb.Document.ContentEnd);

Freshman

Mohammad Dayyan1-Jul-08 15:22