Hi Experts,
I'm supposed to do a program similar to plotting out a graph. Given the x, y coordinates inside a string (e.g. The string looks somehoe like "1 2 3 4 5 6" and I have to use 2 different strings of datas (for x, y) to place different points inside a groupbox. Can anyone provide me with any ideas how I can accomplish this?
Guan Zhao
Hi, Guan
You can subscribe the Paint event of the groupbox and paint these images there.
private void groupBox1_Paint(object sender, PaintEventArgs e)
{
Point[] points = new Point[10]; //save the positions to this array.
for (int i = 0; i < points.Length; i++)
{
points[i].X = points[i].Y = i * 10;
}
Image img = Properties.Resources.Image1;
for (int i = 0; i < points.Length; i++)
{
e.Graphics.DrawImage(img, new Point(i * 10, i * 10));
}
}
Using multiple pictureboxes is anther way.
this.SuspendLayout();
Point[] points = new Point[10];
for (int i = 0; i < points.Length; i++)
{
points[i].X = points[i].Y = i * 10;
}
PictureBox[] pics = new PictureBox[points.Length];
for (int i = 0; i < pics.Length; i++)
{
pics[i] = new PictureBox();
pics[i].Parent = groupBox1;
pics[i].Size = new Size(8, 8);
pics[i].Location = points[i];
pics[i].Image = ........;
pics[i].BackColor = Color.Green;
}
this.ResumeLayout();
Best Regards
Chunsheng Tang
string xcoor = "1 2 3 4 5 6";
string ycoor = "0 4 2 6 8 6";
string[] xpnts = xcoor.Split(' ');
string[] ypnts = ycoor.Split(' ');
List<Point> points = new List<Point>();
for (int ix = 0; ix < xpnts.Length; ++ix) {
Point p = new Point(int.Parse(xpnts[ix]), int.Parse(ypnts[ix]));
points.Add(p);
}
// Now plot <points>
//...
Hi nobugz,
Sorry to confuse you. It is also hard for me to describe the situation to you people clearly. I will try to elaborate abit more. Meanwhile, I shall test out these programs you good people provided me.
Thanks
Hi ChunSheng,
Yes, the idea is to create a plot of points inside a groupbox. But I have a few questions to ask you before I can start trying out your codes.
A groupbox's coordinates works on the inverse cartesian plane, which means coordinates (0, 0) is at the top left corner right? Is it possible to change the (0, 0) position to the bottom left corner like how we used to plot using a cartesian plane?
Secondly,
graphic.FillRectangle(redBrush, x, y, 10, 10);
For the above rectangle plot, can x, and y be a float value (10.13, 10.99)? I've tried to use float value but I got a build error.
Can you help me with this?
Thanks
This will change the coordinate to the one commonly used in mathematics:
//Changes the origin to left bottom
e.Graphics.TranslateTransform(0, groupBox1.Height);
//Flip by x axis
e.Graphics.ScaleTransform(1, -1);
e.Graphics.FillRectangle(Brushes.Blue, 10.1F, 10.1F, 100, 100);
Hi ChunSheng,
Your last post was really a life saviour! Thanks a lot!
I will try to post up my question regarding the plotting as soon as possible.
Once again, thank you.
Warmest Regards
Guan Zhao
e.Graphics.FillRectangle(Brushes.Blue, 10.1F, 10.1F, 100, 100);
What if the values I want to pass in is stored in a declared variable (e.g. x, y)? I can't possibly put a F behind right?
Thanks
The varible should be of float type or others that can be implicitly converted to float type such as int.
float x = 10.1F;
int y = 10;
e.Graphics.FillRectangle(brush, x, y, 100,100);
Hi ChunSheng,
Here is where the complication starts. The float value I'm supposed to retrieve comes from an external data source, which means I'm unable to put a "F" behind every data. The external datais then stored in a variable 'x' and passed into the graphics's argument.
Is there any other way to overcome this problem?
Thanks
float x = float.Parse("100.1"); //Or use float.TryParse(...)
float x = (float) 100.1;
Hi ChunSheng,
The external data source is Microsoft Excel. I've solved the problem of getting the data from Excel, but haven't been able to solve this.
By the way, the data in the cells are float values (e.e 112.1264434).
Hi ChunSheng,
The external data source is Microsoft Excel. I've solved the problem of getting the data from Excel, but haven't been able to solve this.
By the way, the data in the cells are float values (e.e 112.1264434).
Linking up Excel and Excel automation
http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=2108375&SiteID=1
ADO.NET
http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=2134656&SiteID=1
Currently I'm trying out ADO.NET codes. But should you require any help to understand my plight, you can refer to my threads as of above.
Thanks
