Setting SolidBrush color with a ColorDialog

Question

Hey

I am new to c# and need some assistance with something I am trying to do.  I want to use a Color Dialog box to let the user change the color of a brush when painting a grid.  I have used a button, so when it is clicked on the form, the Color Dialog loads up.  However when I select a new color and then paint on the grid, the color hasn't changed.  I have put the code below.  Could anyone explain where I am going wrong, or what I need to do to make sure the grid is painted witht the newly selected color please.

         private void button2_Click(object sender, EventArgs e)
        {
            SolidBrush myBrush = new SolidBrush(Color.Empty);
            ColorDialog diag = new ColorDialog();
            diag.ShowDialog();
            pictureBox1.Refresh();
            Refresh();
              
        }

If anyone can give me some assistance on how I can achieve what I want to do then I would be very grateful.  I just need to understand what code I need to add or where I have gone wrong at the minute.  Really appreciate anyones times.

J

Answer 1

Hi friend,


The reason is though you set the color to the brush, you don't have access to that brush outside button click event.

So change your code as follows.


        SolidBrush myBrush;//Define the varaible outside the methods.
       
        public Form1()
        {
            InitializeComponent();
            myBrush = new SolidBrush(Color.Black);//You set a default color as black.
           
            pictureBox1.Paint += new PaintEventHandler(f1_paint);//Your picture box paint method

            //You can write your other code here, if you want.
        }

        private void f1_paint(object sender, PaintEventArgs e)
        {
            System.Drawing.Graphics formGraphics = this.CreateGraphics();
            formGraphics.FillEllipse(myBrush, 20, 20, 40, 40);
            //You can write other drawing code as you like.
            //But use 'myBrush ' to draw.
            
        }


        private void button2_Click(object sender, EventArgs e)
        {          

            ColorDialog clrdlg = new ColorDialog();

            if (clrdlg.ShowDialog() == DialogResult.OK)
            {

                myBrush = new SolidBrush(clrdlg.Color);
                pictureBox1.Refresh();
            }
        }





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Answer 2

Friend what are you doin with that PictureBox because after changing... the color of Brush you need to DrawSomthing with that brush ...then you can see color changed or not .

Answer 3

Hi Kirtan

Thaks very much for replying to my question with the code.  I added this code but unfortunately it didn't work. when I click on the button, the color dialog window opens, i select a new color for the brush, paint on the grid again but the color has not changed.  I also tried this code, but it didnt work.

 private void button2_Click(object sender, EventArgs e)
        {

            SolidBrush myBrush;

            ColorDialog clrdlg = new ColorDialog();

            if (clrdlg.ShowDialog() == DialogResult.OK)
            {

                myBrush = new SolidBrush(clrdlg.Color);

            }
        }

I used myBrush as this is what I am using earlier in the code as my brush object. I also tried this code but it didn't work.

 private void button2_Click(object sender, EventArgs e)
        {

            SolidBrush myBrush;

            ColorDialog clrdlg = new ColorDialog();

            if (clrdlg.ShowDialog() == DialogResult.OK)
            {

                myBrush = new SolidBrush(clrdlg.Color);
                pictureBox1.Refresh();

            }
        }

Do you know why this isn't working?  Do you have any suggestions on how I can resolve this issue?  Thanks for your time.

Kind regards

Answer 4

Friend , Here is Code you need .!!

 private void button1_Click(object sender, EventArgs e)

        {

            SolidBrush brush;

            ColorDialog clrdlg = new ColorDialog();

            if (clrdlg.ShowDialog() == DialogResult.OK)

            {

                brush = new SolidBrush(clrdlg.Color);

            }

 

            //Now use the Brush where you need

 

            // Thats it

 

        }