textbox

问题 In my code I create an array of TextBoxes : namespace TCalc { public partial class MainWindow : Window { public TextBox[] pubAltArray; public MainWindow() { InitializeComponent(); pubAltArray = new TextBox[10]; Then I create the TextBoxes programmatically using the following code : private void generatePublishedTxtBox() { for (int i = 0; i < 10; i++) { TextBox pubAlt = new TextBox(); grid_profile.Children.Add(pubAlt); pubAlt.SetValue(Grid.RowProperty, 1); ... pubAltArray[i] = pubAlt; } } Than

问题 In my code I create an array of TextBoxes : namespace TCalc { public partial class MainWindow : Window { public TextBox[] pubAltArray; public MainWindow() { InitializeComponent(); pubAltArray = new TextBox[10]; Then I create the TextBoxes programmatically using the following code : private void generatePublishedTxtBox() { for (int i = 0; i < 10; i++) { TextBox pubAlt = new TextBox(); grid_profile.Children.Add(pubAlt); pubAlt.SetValue(Grid.RowProperty, 1); ... pubAltArray[i] = pubAlt; } } Than

问题 I am using input type text box with pre populated values and when I click on the input box the position of the cursor is moving to the start which is not happening in other browsers(only IE11 is the issue present). It's very annoying and spent hours debugging . In fact debugging in IE is very pain. Please note I do not want to manipulate the DOM and we are not suppose to use Jquery anymore in our application. I am using react Js as UI framework. It would be great if someone give some hint on

问题 I'm making a simple Notepad program in C# and in my main form I have a textbox which experiences some weird things, I have a DELETE in my Edit menu on_click I have an event txtContent.text = ""; Also Tried txtContent.Text = string.Empty; And txtContent.Clear(); but every time after that operation my Caret disappears, I thought it might be a focus issue but it is not I tried that too. Accidentally I minimized my notepad and than opened it again Cursor came back and it doesn't disappears after

问题 I want to limit user to type just numbers in TextBox. I add this code In keypress Event: private void txtPartID_KeyPress(object sender, KeyPressEventArgs e) { if (((e.KeyChar >= '0') && (e.KeyChar <= '9')) == false) { e.Handled = true; } } but after that BackSpace key don't work for this TextBox. How can I change this? 回答1: You can check for backspace using this, if(e.KeyChar == '\b') And better way to check only for numbers is private void txtPartID_KeyPress(object sender, KeyPressEventArgs

问题 I want to know how to let a user resize a textbox themselves at runtime. Preferably the little tabs on the borders of the textbox would popup and they can drag to resize as per most apps. Is it possible to do this natively using winforms? if not is there a library to help do it? I would rather use native components if possible. All my google searches turn up false positives. 回答1: The simpliest solution by using the native components would be implementing you own custom-control using the

问题 I want my program to automatically select the last line of text in a multiline TextBox. I've tried the following code to select the first line in the TextBox: Private Sub TextBoxLog_TextChanged(sender As Object, e As EventArgs) Handles TextBoxLog.TextChanged Dim Line As Integer = TextBoxLog.GetLineFromCharIndex(TextBoxLog.Lines.GetLowerBound(0)) Dim lineLength As Integer = TextBoxLog.Lines(Line).Length TextBoxLog.SelectionStart = TextBoxLog.GetLineFromCharIndex(Line) TextBoxLog

问题 I'm pretty sure it's not possible to do this but I'm still asking for it. Is there a way for a user to insert a null (or an undefined) value into an html text input? I need to distinguish between a null value and an empty string and I would like to allow the user to set this value into a single input. For what I can see across the web, the standard solution to this problem is to match the text input with a checkbox that tell if the value is null or not. From my understanding, the limitation

问题 I'm pretty sure it's not possible to do this but I'm still asking for it. Is there a way for a user to insert a null (or an undefined) value into an html text input? I need to distinguish between a null value and an empty string and I would like to allow the user to set this value into a single input. For what I can see across the web, the standard solution to this problem is to match the text input with a checkbox that tell if the value is null or not. From my understanding, the limitation

问题 I'm pretty sure it's not possible to do this but I'm still asking for it. Is there a way for a user to insert a null (or an undefined) value into an html text input? I need to distinguish between a null value and an empty string and I would like to allow the user to set this value into a single input. For what I can see across the web, the standard solution to this problem is to match the text input with a checkbox that tell if the value is null or not. From my understanding, the limitation