The Location of the cursor in a Text Box

max29297

Is there a property of the Text Box that tells you the line and column of the cursor? And also, is there an event that tells you when these properties have changed? I've looked for both, but I can't seem to find them. I'll look again, to make sure...

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Christian Graus

There are two properties for selected text, something like SelectionStart and SelectionLength. The first one will give you the cursor position, but not line position in a multiline text box. I don't think there's an event that's fired whenever any property is changed.

Christian Graus - Microsoft MVP - C++ "I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

mav northwind

There's the SelectionChanged event. This event is fired when the cursor is moved (because the cursor basically is a selection with SelectionLength==0) You'll have to calculate the line and column yourself from the given SelectionStart property.

Regards, mav -- Black holes are the places where God divided by 0...

max29297

Thanks guys! Here's what I ended up doing...

char[] before = textBox.Substring(0, textBox.SelectionStart);
int lineBreaks;
int lastLineIndex;

for (int a = 0; a < before; a++) {
	if (before[a] == '\n') {
		lineBreaks++;
		lastLineIndex = a + 1;
	}
}

cursorPositionLabel.Text = "Ln " + lineBreaks.ToString()
cursorPositionLabel += " , Col " + (textBox.SelectionStart - lastLineIndex).ToString();

So much for preserving the tabs... :rolleyes:

If I had a sig, it would probably go here.