Name
TextBoxBase
Synopsis
This is the base class for the TextBox
and
RichTextBox
classes. It provides the base
functionality for a Control
into which the user
can type and edit text.
You can set the Text
in the control, or
AppendText()
. You can also find the
TextLength
. You can Select()
text, or manipulate the SelectionStart
and
SelectionLength
. A SelectedText
property allows you to retrieve the current selection. If the
SelectionLength
is 0, the
SelectionStart
represents the current position of
the caret. You can ensure that the caret is visible using
ScrollToCaret( )
. SelectAll()
will select the entire content, and Clear()
will
remove it.
You can Cut( )
or Copy()
the
selection to the clipboard, and Paste()
an
IDataObject
from the clipboard or a drag-and-drop
operation.
The textbox is single line by default, but you can enable
Multiline
support (and find the number of
Lines
in the control). If you have a multiline
control, you can enable WordWrap
.
There is basic Undo()
support. You can find out
if the control CanUndo
the previous operation, and
you can use ClearUndo()
to clear the undo buffer.
public abstract class TextBoxBase : Control { // Public Instance Properties public bool AcceptsTab{set; get; } public virtual bool AutoSize{set; get; } public override Color BackColor{set; get; } // overrides Control public override Image BackgroundImage{set; get; } // overrides Control public BorderStyle BorderStyle{set; get; } public bool CanUndo{get; } public override Color ForeColor{set; get; ...
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