I often see a checkbox next to the input field which enables regex. All the text in the input field will then be interpreted as a regular expression. The problem I see with your approach is that it would not really be discoverable that you can use regex by prefixing your input with "re". Also, what would happen if you would want to split a word which contains "re" in the middle? That would make things messy.

A couple of points are worth mentioning here. Firstly, the general consensus is that disabling buttons is bad for accessibility reasons https://www.smashingmagazine.com/2021/08/frustrating-design-patterns-disabled-buttons/ it can be done, but personally, I'd aim to avoid it. Secondly, in terms of a dirty state changing from and then back to the original value should likely not result in a dirty flag being set. You say: But I don't see options that compare the original and current value of the input to check if it's actually different and needs to be saved. I'm not sure I see this in practice, most solutions will compare to the initial values (and keep those in memory/state) to establish if the form or field is dirty (e.g. Formik https://formik.org/docs/api/formik ). Additionally, if you were writing this from scratch you'd want to use this pattern.

Looks like you need something like that:tb3.Text = string.Join("\n", Directory.GetFiles(tb2.Text, "*.txt"));

You can take it that way, if it's in the root:foreach(var pb in this.Controls.OfType<TextBox>()) { //do stuff } I'm sorry, but I've got to check inside.If there's a GroupBox on the uniform, then we need to connect the tour or the glass.

Every update, do it.YourTextBox.AppendText(YourTextBox.SelectedText); Or https://msdn.microsoft.com/en-us/library/system.windows.forms.textboxbase.scrolltocaret(v=vs.110).aspx RichTextBox1.SelectedText = TextBox1.Text + "\r\n"; RichTextBox1.ScrollToCaret(); p.s. Heard about the ScrollToEnd method; but he never used it.

TextBox It only works with the lines. Even if you put a number in there, it' remain a row of symbols that mark that number.It follows from the above allegation that after var balance = textBox1.Text;♪ balance to have a type stringand after var ost = balance; ♪ ost It's gonna be like, string♪textBox6 - apple; That's not what the compiler says, because the operator. - not defined for type TextBox♪How's that?There are different ways to decide, one of them, in the comments, @lexander Petrov - use the element for the entry of the cells https://msdn.microsoft.com/ru-ru/library/system.windows.forms.numericupdown(v=vs.110).aspx (for use, see reference documentation), but it's not all that simple. First, this controller uses a type. Decimal as values, and it's still gonna have to lead to the numerical types you need, for example. int♪ Second, it requires a clear indication of the maximum and minimum values. In some cases it's good, in some cases it's not. Thirdly, the control requires a clear indication of the number of signs after the comma and a step to change the value of arrows up/downwards that cannot be concealed. Perhaps the characteristics listed will not be a deficiency in your specific case, if so, simply a substitute. TextBox ♪ NumericUpDownand use the explicit introduction of the types for the transmission of values to your variables, for example int a = Convert.ToInt32(numericUpDown1.Value); или так int a = (int)numericUpDown1.value; The other option is to transform it into into TextBox row, if possible, and if not possible (the user has not imposed a number), erroneous entry or simply repaint the background, thus making it clear that the value introduced does not meet the requirements of the programme.This option will require some of the following:Transformation string Number.Use class https://msdn.microsoft.com/ru-ru/library/system.convert(v=vs.110).aspx (referencing)Use the method https://msdn.microsoft.com/ru-ru/library/b3h1hf19(v=vs.110).aspx (referencing)Use the method https://msdn.microsoft.com/ru-ru/library/f02979c7(v=vs.110).aspx (referencing)The first two options would lead to exclusion when attempting to transform the wrong entry line. TryParseUnlike them, he returns true if conversion is successful and records the converted value into a variable transferred to the second mandatory retrofit parameter outor false In all other cases, the content of the variable to which the value is to be placed will not change. It's convenient, because we can place this method in a condition. if♪ By the way, Convert♪ Parseand TryParse Applicable to all standard numerical types.To let the user know he didn't make the right point.It can be done differently, but in any case, we'll need to know that the user has actually introduced something. This is what we need to take advantage of. https://msdn.microsoft.com/ru-ru/library/system.windows.forms.control.textchanged(v=vs.110).aspx ♪ The reference also gives an example of a change in the colour of the text with an incorrect entry.I wanted the text box to take the variable meaning.To this end, one of the ways mentioned above should transform the meaning TextBox.Text of string Number required, complete deduction from the value obtained and record the result back TextBox.Text by means of a method ToString()which, for any numerical type, returns his symbolic performance.In case of use NumericUpDown A little easier: numericUpDown1.Value -= 10; или int a = 10; numericUpDown1.Value -= a; Another important point is the visibility of variables. The local variables you announce in the method are visible only within this method. That means you can't treat them in other ways. For the variable to be visible to all class methods, it needs to be made by the field or class properties, and declared outside the method, before or after, it doesn't matter, it's not really inside.There's only one thing left to decide what kind of decision you're going to do and how to practice it.

May be possible through the processor of the event:private void textBox1_Validated(object sender, EventArgs e) { if (((TextBox)sender).Text == "") { ((TextBox)sender).Text = "0"; } } Sign it to all the boxes.Get out of here: https://stackoverflow.com/questions/17902882/how-to-enter-a-default-value-when-a-textbox-is-empty

You've got a whole division. (i / numVal)'Cause 100 It's only on the istage, and it's on everyone else. 0♪ Change. (double)i / numVal♪Another problem could be that the presentation should be updated on the form. The simplest way is to cause Application.DoEvents(); after the installation of a new sign of progress.

private void tb_Name_TextChanged(object sender, EventArgs e) { if (tb_Name.Text != string.Empty) { if (!isHalf) { pb.Value += (pb.Maximum / 2); isHalf = true; } } else { pb.Value -= (pb.Maximum / 2); isHalf = false; } }

Usually, the calculation of all Enabled/Disabled properties is relatively rapid, compared with the speed of changes from the user. So it makes sense to make one method that computes all these conditions to all counters at once -- for example, EnableControls()♪ Well, you're doing the counter-measure processors. EnableControls()♪ Also cause this method when the shape is downloaded.And the EnableControls() method looks like:void EnableControls() { button1.Enabled = checkBox1.Checked || checkBox2.Checked; button2.Enabled = ... }

private void button1_Click(object sender, EventArgs e) { // Словарик с числами и их количеством Dictionary<int, int> repeats = new Dictionary<int, int>(); // Флаг, определяющий есть ли хоть один повтор bool isRepeat = false; // Пробегаем по всем полям foreach (TextBox tb in Controls.OfType<TextBox>().Where(t => t.Enabled == true)) { var numbers = tb.Text.Split(' '); // Пробегаем по всем числам foreach (var numb in numbers.Select(int.Parse)) { if (repeats.ContainsKey(numb)) { repeats[numb] += 1; isRepeat = true; } else { repeats[numb] = 1; } } } if (!isRepeat) { MessageBox.Show("Повторов нет!"); return; } listBox1.Items.Add("Число\tПовторов"); foreach (var item in repeats.OrderByDescending(v => v.Value)) { listBox1.Items.Add(string.Format("{0}\t{1}", item.Key, item.Value)); } }

Button code:private void button1_Click(object sender, EventArgs e) { // Словарь с повторами цифр Dictionary<int, Repeat> repeats = new Dictionary<int, Repeat>(); bool isRepeat = false; // Находим количество повторов каждой цифры во всех TextBox-ах foreach (TextBox tb in Controls.OfType&lt;TextBox&gt;().Where(t =&gt; t.Enabled)) { tb.BackColor = DefaultBackColor; if (!string.IsNullOrWhiteSpace(tb.Text)) { // Разделитель "пробел" string[] digits = tb.Text.Split(' '); foreach (int digit in digits.Select(int.Parse)) { Repeat repeat = new Repeat { RepeatControl = new List&lt;TextBox&gt;() }; if (repeats.ContainsKey(digit)) { repeat = repeats[digit]; isRepeat = true; } // Количество повторений цифры repeat.RepeatCount += 1; // Список TextBox полей, в которых она повторяется repeat.RepeatControl.Add(tb); repeats[digit] = repeat; } } } if (!isRepeat) { MessageBox.Show(@"Нет повторяющихся чисел!"); return; } Dictionary&lt;int[], Triple&gt; triplets = new Dictionary&lt;int[], Triple&gt;(); var repeatsArray = repeats.ToArray(); // Перебираем все возможные комбинации троек чисел for (int d1 = 0; d1 &lt; repeatsArray.Length - 2; d1++) { for (int d2 = d1 + 1; d2 &lt; repeatsArray.Length - 1; d2++) { for (int d3 = d2 + 1; d3 &lt; repeatsArray.Length; d3++) { var dig1 = repeatsArray[d1]; var dig2 = repeatsArray[d2]; var dig3 = repeatsArray[d3]; // Находим пересечения всех массивов TextBox у данной тройки чисел var tbControls = ((dig1.Value.RepeatControl.Intersect(dig2.Value.RepeatControl)).Intersect( dig3.Value.RepeatControl)).ToArray(); // Количество TextBox полей, в которых присутствуют все три числа int tbControlsCount = tbControls.Length; // Массив с тройкой чисел int[] triplet = {dig1.Key, dig2.Key, dig3.Key}; Triple triple = new Triple() { // Сколько раз встречается тройка этих чисел TripleCount = tbControlsCount, // И в каких TextBox-ах TripleControls = tbControls }; if (tbControlsCount &gt; 0) { triplets.Add(triplet, triple); } } } } if (triplets.Count == 0) { MessageBox.Show(@"Нет повторяющихся комбинаций чисел!"); return; } // Сортируем получившуюся коллекцию по убыванию количества троек чисел и берем первый элемент с наибольшим значением var firstTriplet = triplets.OrderByDescending(v =&gt; v.Value.TripleCount).First(); // Количество повторений тройки чисел label2.Text = firstTriplet.Value.TripleCount.ToString(); // Для красоты вывода сортируем тройку чисел по возрастанию var tDigits = firstTriplet.Key; Array.Sort(tDigits); label4.Text = string.Format("{0}, {1}, {2}", tDigits[0], tDigits[1], tDigits[2]); // Подсвечиваем поля где присутствуют тройки чисел foreach (TextBox tb in firstTriplet.Value.TripleControls) { tb.BackColor = Color.CadetBlue; } } Support classes:public struct Repeat { public int RepeatCount; public List<TextBox> RepeatControl; } public struct Triple { public int TripleCount; public TextBox[] TripleControls; } Results:

Even if you hadn't done the code, he couldn't work. The thing is, any countermeasure listens to the flow that was created. But the communications cycle only rolls in the main flow of the application, the pools cannot receive final messages. Therefore, your textboxes will not respond to events (this cannot even introduce text, the introduction of the text also requires an active communication cycle).The only possible solution is to throw away Parallel.For and replace it with the normal cycle for♪Well, prior to the suspension of the program, I'll risk assuming that there's an interlock in the line. Controls.Add(textbox); - I'm sure this method has to send an end message to the main UI flow, and it's just running the cycle. for♪ But it's a hydration, if you need a precision, you're gonna have to run a snack and check where it hangs.Another mistake you might have made - judging by code, textBoxes is a simple dictionary.Dictionary<Point,TextBox>) But you can't work with a dictionary at the same time! If the code had any meaning, you should use it. ConcurrentDictionary<,> for the same purpose.

if (e.KeyChar == (char)13) { string text = textBox1.Text.Trim(); if (text == string.Empty) { dataGridView1.DataSource = serijospakavimoprotokolasBindingSource; textBoxNumber.DataBindings.Clear(); textBoxNumber.DataBindings.Add("Text", serijospakavimoprotokolasBindingSource, "Serijos_Nr"); } else { var query = (from o in serijospakavimoprotokolasBindingSource.DataSource as List<Serijos_pakavimo_protokolas> where o.Serijos_Nr.Contains(text) || o.Pavadinimas.Contains(text) || o.Pakuote == text || o.Serijos_dydis.Contains(text) select o).ToList(); if (query.Any()) { dataGridView1.DataSource = query; textBoxNumber.DataBindings.Clear(); textBoxNumber.DataBindings.Add("Text", query, "Serijos_Nr"); } } } textBoxNumber - it's the text box to which the connection was made. Change the name for the one you have."Serijos_Nr" - the characteristic attached to this textbox. It's a good substitute. But I think I guessed.The logic of the elementary: when something is found, we attach the specgrid and textbox to the data found. When nothing's found, we'll get back to the original connections.Code boards: give all counter-intelligent names. What? textBox1? If it's for search/filtration, call it. textBoxSearch or textBoxFilter♪ And so on.I introduced an additional local variable. textwhich has led the code to a sharp decline. Use this technique.Here's the code: .DataSource as List<T> Thunder and slow. It is better to use directly the list, which is the original data source.

Dialects of movements of regular expressions, of course, may differ.Here is the &quot; pub &quot; decision for extended regular expression:^(1[6-9]|[2-9][0-9]|100)$ The brackets are limited to three options, the options are divided by symbols. :1[6-9] [2-9][0-9] 100 First option: symbol 1followed by any of the symbols from the range 6-9♪Second option: any symbol from range 2-9followed by any of the symbols from the range 0-9♪third option: just three symbols 100♪

This function will give us a back position depending on the location of the bowl point on the textbox: private int GetTxtCharIndex(TextBox txt, Point point) { int idx = txt.GetCharacterIndexFromPoint(point, true); if (txt.Text.Length > 0) { Rect rect = txt.GetRectFromCharacterIndex(idx); if (rect.Right < point.X) idx++; } return idx; }

In WinForms, this is being addressed by the creation of a successor class TextBoxsending a message to himself https://msdn.microsoft.com/en-us/library/windows/desktop/bb761639(v=vs.85).aspx :using System; using System.ComponentModel; using System.Windows.Forms; using System.Runtime.InteropServices; class CueTextBox : TextBox { [Localizable(true)] public string Cue { get { return mCue; } set { mCue = value; updateCue(); } } private void updateCue() { if (this.IsHandleCreated &amp;&amp; mCue != null) { SendMessage(this.Handle, 0x1501, (IntPtr)1, mCue); } } protected override void OnHandleCreated(EventArgs e) { base.OnHandleCreated(e); updateCue(); } private string mCue; // PInvoke [DllImport("user32.dll", CharSet = CharSet.Unicode)] private static extern IntPtr SendMessage(IntPtr hWnd, int msg, IntPtr wp, string lp); } You add this class to the project, compilate, then leave. CueTextBox from Toolbox to shape and make a characteristic Cue♪ Otherwise, he's acting like a standard. TextBox♪WPF Watermark is conventional TextBlock over textbox + BooleanToVisibilityConverter with an empty text check:<Window x:Class="WpfApplication2.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:local="clr-namespace:WpfApplication2" mc:Ignorable="d" Title="MainWindow" Height="350" Width="525"> <Window.Resources> &lt;SolidColorBrush x:Key="brushWatermarkBackground" Color="White" /&gt; &lt;SolidColorBrush x:Key="brushWatermarkForeground" Color="LightSteelBlue" /&gt; &lt;SolidColorBrush x:Key="brushWatermarkBorder" Color="Indigo" /&gt; &lt;BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter" /&gt; &lt;Style x:Key="EntryFieldStyle" TargetType="Grid" &gt; &lt;Setter Property="HorizontalAlignment" Value="Stretch" /&gt; &lt;Setter Property="VerticalAlignment" Value="Center" /&gt; &lt;/Style&gt; &lt;/Window.Resources&gt; &lt;Grid&gt; &lt;Grid.RowDefinitions&gt; &lt;RowDefinition Height="auto" /&gt; &lt;RowDefinition /&gt; &lt;/Grid.RowDefinitions&gt; &lt;Grid Grid.Row="0" Background="{StaticResource brushWatermarkBackground}" Style="{StaticResource EntryFieldStyle}" &gt; &lt;TextBlock Margin="5,2" Text="This prompt dissappears as you type..." Foreground="{StaticResource brushWatermarkForeground}" Visibility="{Binding ElementName=txtUserEntry, Path=Text.IsEmpty, Converter={StaticResource BooleanToVisibilityConverter}}" /&gt; &lt;TextBox Name="txtUserEntry" Background="Transparent" BorderBrush="{StaticResource brushWatermarkBorder}" /&gt; &lt;/Grid&gt; &lt;/Grid&gt; </Window> code for WPF taken from https://stackoverflow.com/questions/833943/watermark-hint-text-placeholder-textbox-in-wpf

In order to prohibit the introduction of any symbols, filter the entry into the event processing. PreviewTextInput♪The following is an example of how this event can allow entry into force textBox only for numbers.private void TextBox_PreviewTextInput(object sender, TextCompositionEventArgs e) { e.Handled = !(Char.IsDigit(e.Text, 0)) } In order to complete it under your task, it is sufficient to add a test whether the injectable symbol is Latin. An example of such a test can be seen in this matter: https://ru.stackoverflow.com/questions/238848/%D0%9E%D0%BF%D1%80%D0%B5%D0%B4%D0%B5%D0%BB%D0%B8%D1%82%D1%8C-%D1%8F%D0%B2%D0%BB%D1%8F%D0%B5%D1%82%D1%81%D1%8F-%D0%BB%D0%B8-%D1%81%D0%B8%D0%BC%D0%B2%D0%BE%D0%BB-%D0%B2-%D1%81%D1%82%D1%80%D0%BE%D0%BA%D0%B5-%D0%BB%D0%B0%D1%82%D0%B8%D0%BD%D1%81%D0%BA%D0%B8%D0%BC "

You made a team, but you didn't do it. Judging by the code, you need to addcmd.ExecuteNonQuery();

Perhaps the simplest way to display the data on the form is to move the elements from the data source window into shape.Well, actually. https://msdn.microsoft.com/ru-ru/library/ms171884.aspx