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c# panel gradient mode

Posted on 2011-03-12
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Last Modified: 2013-12-17
Hi ,

I have a panel whose background color can be gradient color eg. blue.
How can I do it?

Thanks,
JT
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Question by:jtran007
9 Comments
 
LVL 6

Expert Comment

by:Webmonkey
ID: 35119259
Well, a [typical] gradient is a fade from one color to another.  Assuming that this is what you were looking for, you would need to look for a property where you can assign the secondary color (the color at the end of the gradient.  Although, I don't remember seeing that as an option for a Panel.  I've only seen this as part of the Chart controls.
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Author Comment

by:jtran007
ID: 35119397
Hi,

I use one of the sample code from this website:
      private void panel1_Paint(object sender, PaintEventArgs e)
        {
            Control control = (Control)sender;
            Graphics g = e.Graphics;
            g.Clear(Color.White);
            Color startColor = Color.FromArgb(106, 127, 156);
            Color endColor = Color.FromArgb(177, 197, 218);
            using (LinearGradientBrush darkBrush = new LinearGradientBrush(control.ClientRectangle, startColor, endColor, LinearGradientMode.Vertical))
            {
                g.FillRectangle(darkBrush, control.ClientRectangle);
            }
        }
 

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However I don't see my panel changing color in gradient mode. Could you explain why?

Thanks,
JT
0
 
LVL 86

Expert Comment

by:Mike Tomlinson
ID: 35119554
Did you wire up the Paint() event to your handler?
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LVL 6

Expert Comment

by:Webmonkey
ID: 35119883
This is just the definition of a method.  In order for your page to use this method, you'll need to tell the appropriate event handler to call this method.

If you are using Visual Studio, open the page's design view.  Once there select the panel itself, then open the properties tab (normally a "pullout" menu on the right).  From there locate the icon at the top of the properties panel that has a lightening bolt on it - click it.  This will allow you to see the events exposed by this object, as well as any events that have been "wired up" to a specific method.  Locate the "paint" event, and add "panel1_Paint" as it's value.
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Author Comment

by:jtran007
ID: 35121455
Hi,

You are right. It is working ; but in the panel I have a text box whose background color is
shown in solid color. How can I make this text box color gradient too: same as the panel?

Thanks,
JT
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LVL 8

Accepted Solution

by:
dericstone earned 1000 total points
ID: 35122817
Do you really want a TextBox control with a gradient background? Because that would make it difficult for users to understand that there is a field to be changed. If you mean to have a Label control with text in it, you can set the background to gradient as follows.
public Form1()
    {
      InitializeComponent();

      this.SetStyle(ControlStyles.SupportsTransparentBackColor, true);
      this.BackColor = Color.Transparent;
    }

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LVL 6

Expert Comment

by:Webmonkey
ID: 35153296
but in the panel I have a text box whose background color is shown in solid color. How can I make this text box color gradient too

In all fairness, that should be posted as a separate question.
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Author Closing Comment

by:jtran007
ID: 35284774
Thanks,
JT
0

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