Hi all,
I'm using a multiline+scrol lbar textbox to log output as my program
runs. Basically, I pass a reference to the class instance that's
currently doing stuff, and the instance can tack on whatever it needs
to the text property.
Initially I had trouble with getting the textbox to refresh
as-the-program ran, but the TextBox.Refresh () method took care of that
for me.
Now the problem is that the output lines run longer than the visible
textbox - so the most recent messages can't be seen until the routine
is completely finished.
I would like the textbox to "auto-scroll-to-the-bottom-line" every time
I tack a new line into it. How can I do this?
Thanks for any ideas,
cdj 2 7308
I had to do this once a long time back. After searching and searching the
only solution I could find was to do what is posted below. Also, I ended up
using a RichTextBox as it's buffer would hold more data.
I don't claim to know if this is the best way, but it was the only way I
could find via google and asking around a couple years ago, and it ended up
working.
I had to p/invoke 2 win32 functions and create a point class:
[DllImport("user 32", CharSet=CharSet .Auto)]
static extern bool GetScrollRange( IntPtr hWnd, int nBar, out int lpMinPos,
out int lpMaxPos);
[DllImport("user 32", CharSet=CharSet .Auto)]
static extern IntPtr SendMessage(Int Ptr hWnd, int msg, int wParam, POINT
lParam);
class POINT
{
public int x;
public int y;
public POINT()
{
}
public POINT(int x, int y)
{
this.x = x;
this.y = y;
}
}
Then, using my RichTextBox as below in a function where I passed in a
string:
RichTextBox1.Se lectionStart = RichTextBox1.Te xtLength + 1;
RichTextBox1.Ap pendText(string );
GetScrollRange( RichTextBox1.Ha ndle, SB_VERT, out min, out max);
SendMessage(Ric hTextBox1.Handl e, EM_SETSCROLLPOS , 0, new POINT(0, max -
RichTextBox1.He ight));
RichTextBox1.Up date();
Hope that helps.
On Jan 25, 4:16 pm, "Pete" <m...@ineedhelp .orgwrote:
I had to p/invoke 2 win32 functions and create a point class:
Thanks for the suggestion. After digging around, I found that using
TextBox.AppendT ext(string text), rather than TextBox.Text += text gives
the auto-scroll-to-bottom I needed - and much easier than going down to
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