| public Select ( int start, int length ) : void | ||
| start | int | |
| length | int | |
| return | void | |
public static void SetRichTextBoxDropString(System.Windows.Forms.TextBoxBase yourCtr, Action action = null)
{
if (yourCtr == null)
{
return;
}
if (yourCtr is RichTextBox)
{
((RichTextBox)yourCtr).AllowDrop = true;
}
else if (yourCtr is TextBox)
{
((TextBox)yourCtr).AllowDrop = true;
}
else
{
yourCtr.AllowDrop = true;
}
yourCtr.DragDrop += (sender, e) =>
{
System.Windows.Forms.TextBoxBase tempTextBoxBase = sender as System.Windows.Forms.TextBoxBase;
string tempText = (string)e.Data.GetData(typeof(string));
if (tempText == null || tempTextBoxBase == null)
{
return;
}
int selectionStart = tempTextBoxBase.SelectionStart;
tempTextBoxBase.Text = tempTextBoxBase.Text.Insert(selectionStart, tempText);
tempTextBoxBase.Select(selectionStart, tempText.Length);
action?.Invoke();
};
yourCtr.DragEnter += (sender, e) =>
{
if (e.Data.GetData(typeof(string)) == null)
{
e.Effect = System.Windows.Forms.DragDropEffects.None;
}
else
{
e.Effect = System.Windows.Forms.DragDropEffects.Move;
}
};
}
internal static void Find(TextBoxBase textBox, string findString, bool caseSensitive, bool upwards)
{
var comparison = caseSensitive
? StringComparison.CurrentCulture
: StringComparison.CurrentCultureIgnoreCase;
var text = textBox.Text;
if (text.IndexOf(findString, comparison) == -1)
{
ShowFormattedMessageBox("Cannot find \"{0}\".", findString);
return;
}
var foundIndex = Find(text, textBox.SelectionStart, textBox.SelectionLength, findString, comparison, upwards);
if (foundIndex == -1)
{
ShowFormattedMessageBox("No further occurences of \"{0}\" have been found.", findString);
return;
}
textBox.Select(foundIndex, findString.Length);
textBox.ScrollToCaret();
}
public static void scrollToEnd(TextBoxBase txb)
{
txb.Focus();
txb.Select(txb.TextLength, 0);
}
/// <summary>
/// Unselect text in textbox
/// </summary>
/// <param name="control">the text box control</param>
public static void UnselectText(TextBoxBase control)
{
if (control.InvokeRequired)
{
control.Invoke(new unselectText(UnselectText), control);
}
else
{
control.SelectionLength = 0;
if (!String.IsNullOrEmpty(control.Text))
{
control.Select(control.Text.Length, 0);
}
}
}
/// <summary>
/// Moves the input caret to the end of the TextBox's current text (no text is actually selected).
/// </summary>
public static void SelectEnd(this System.Windows.Forms.TextBoxBase textBox)
{
textBox.Select(textBox.Text?.Length ?? 0, 0);
}