textbox

问题 I think the following code should be self-explanatory. #include <Windows.h> static HWND textBoxInput; static HWND button; static HWND textBoxOutput; LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam); int CALLBACK WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR cmdLine,int nCmdShow) { HWND hMainWindow; WNDCLASS wc = {}; wc.lpfnWndProc = WindowProc; wc.lpszClassName = "Main's window class"; wc.hInstance = hInstance; RegisterClass(&wc); hMainWindow =

问题 We are looking for a way to make a textbox replace certain characters as a person types in it. Note, we are focusing on the control itself, not bindings, viewmodels, etc. For the sake of this question, assume there is a window with a textbox sitting in the middle of it and nothing else. No data, no viewmodel, no bindings, etc. I've updated the question because it seems all the answers below keep focusing on bindings, dependency properties, coersion, etc. While I appreciate the suggestions, as

问题 I am trying to use a custom TextBox in the DatePicker control, but I can't get the date to bind from the popup calendar to the TextBox . I don't want to have to style the entire DatePicker unless I have to, and the DatePickerTextBox has its own control, so there must be a way to only alter it. The code below is what I have as a start: <Style TargetType="{x:Type DatePickerTextBox}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type DatePickerTextBox}"> <TextBox x

问题 I have an application that logs messages to the screen using a TextBox. The update function uses some Win32 functions to ensure that the box automatically scrolls to the end unless the user is viewing another line. Here is the update function: private bool logToScreen = true; // Constants for extern calls to various scrollbar functions private const int SB_HORZ = 0x0; private const int SB_VERT = 0x1; private const int WM_HSCROLL = 0x114; private const int WM_VSCROLL = 0x115; private const int

问题 I built a quiz game with a cartoon question bubble. The bubble is re sized to the length of the question. I want to a change event on the dynamic textbox to call a function that changes the size of the question bubble. However, the change event is never called when my textbox value is modified dynamically from code. question_txt.addEventListener(Event.CHANGE, setTextBubbleSize); function setTextBubbleSize(event:Event):void { trace("QUESTION TEXT CHANGED"); textBubble_mc.height = 30 + question

问题 I am very new to C# and this question might sound very stupid. I wonder how I'm going get the integer(user's input) from the textBox1 and use it in if else statement? Please give some examples 回答1: You need to parse the value of textbox.Text which is a string to int value. You may use int.TryParse, or int.Parse or Convert.ToInt32. TextBox.Text property is of string type. You may look at the following sample code. int.TryParse This will return true if the parsing is successful and false if it

问题 This question already has answers here : How can I unmask password text box and mask it back to password? (7 answers) Closed 4 years ago . I have a textbox in a c# windows form i am having problems in assigning a null values to a PasswordChar . What i want to do is that if a checkbox is checked then the PasswordChar should be null i.e the actual text should be displayed else the PasswordChar should be * . This what i have tried private void checkBox1_CheckedChanged(object sender, EventArgs e)

问题 I want to change the maxlength of a textbox with JavaScript or jQuery: I tried the following but it didn't seem to help: var a = document.getElementsByTagName('input'); for(var i=0; i<a.length; i++) { if((a[i].type!= 'radio')||(a[i].type!= 'checkbox')) a[i].maxlength = 5; } document.getElementsByTagName('input')[1].maxlength="3"; $().ready(function() { $("#inputID").maxlength(6); }); What am I doing wrong? 回答1: Not sure what you are trying to accomplish on your first few lines but you can try

问题 I have created a custom control inheriting TextBox . This custom control is a numeric TextBox , only supporting numbers. I am using OnPreviewTextInput to check each new character being typed to see if the character is a valid input. This works great. However, if I paste the text into the TextBox , OnPreviewTextInput is not fired. What is the best way to capture pasted text in a TextBox ? Also, I have a problem when the back space is pressed, I can't figure out what event this will fire.

问题 I have this class: public partial class Window1 : Window { public String Name2; public Window1() { InitializeComponent(); Name2 = new String('a', 5); myGrid.DataContext = this; } // ... } And I want to display the string Name2 in the textbox. <Grid Name="myGrid" Height="437.274"> <TextBox Text="{Binding Path=Name2}"/> </Grid> But the string isn't displayed. Also, if the string Name2 is updated periodically using a TimerCallback , do I need to do anything to make sure the textbox is updated