When a Windows Forms TextBox is in password mode, it is restricted and the ImeMode is disabled (As discussed here and here). How can I design a textbox that doesn't reveal the user's input but that takes/collects the Chinese input from the keyboard (basically a workaround for taking in Chinese input in a password TextBox)?
You can use the OnKeyPress event to intercept input before it appears in the TextBox. Save the input somewhere else and put some masking char into the TextBox.
private void TextBox1_KeyPress(object sender, KeyPressEventArgs e)
{
//save the key pressed
TextBox1.Text += "*";
e.handled = true;
}
Related
I have made a textbox and I want the user to type in a string of numbers and hit enter. I have setup the following:
private void textBox1_TextChanged(object sender, EventArgs e)
{
String UserBarcode;
Focus();
UserBarcode = Console.ReadLine();
MessageBox.Show(UserBarcode);
}
When I enter any key into the textbox, I get a message box with nothing in it. I want to have the program wait til it hears the enter key then display the contents of the textbox.
The Textbox.TextChanged event fires as soon as the text in the textbox is changed at all. If you want a message box with the full string, you probably want to consider using the Textbox.LostFocus event or a button's Click event.
So you could have something like (I'm taking a stab at this here, as I've used VB rather than C#)
private void textBox1_LostFocus(object sender, EventArgs e)
{
MessageBox.Show(sender.Text)
}
If you're using a button, the above function should work, but you'll want to substitute textBox1.Text for sender.Text.
Take a look at Focus and Validation Events
There are several events that you can handle, depending on your goals and how your application is designed. If you want to perform validation and/or are using data binding, you may want to go with handling the validating/validated events. By default data bindings update a bound property after OnValidating. If you use LostFocus and read the value from a bound object, instead of your control, you will get inconsistent results.
I was able to figure it out finally. For some reason when I manually entered the code I kept getting multiple random errors. I started a new Visual C # Windows Forms Application, Made a textbox, chose the keydown property and double clicked on it to have the program inject the code for the keydown function and then I filled in the if statement pointing to the enter key. The final code looks like this:
private void textBox1_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
MessageBox.Show(textBox1.Text);
}
}
I have a form where I need to validate the textboxes like Firstname, Middlename, Lastname, emailId, date, mobilenumber. The validation should happen when a user starts typing in the textbox. errorprovider should show message under textbox if a user enters numbers in place of text and text in place of numbers. I got to know about implicit validation and explicit validation but I feel better to use implicit validation only because its on time error provider when user looses focus on text box or if he shifts to another textbox. I've posed this kind of question with a explicit validation code but no one responded me. So Im making it simple to get help. Do not think I havent done enough research before posting this question.
If you have a very specific validation to do, Marc's answer is correct. However, if you only ensure the "enter number instead of letters" or "enter letters instead of numbers" thing, a MaskedTextBox would do the job better than you (user wouldn't be able to answer incorrect data, and you can still warn them by handling the MaskInputRejected event)
http://msdn.microsoft.com/en-us/library/kkx4h3az(v=vs.100).aspx
You should take a look to the TextChanged Event in of your textbox.
http://msdn.microsoft.com/en-us/library/system.windows.forms.control.textchanged.aspx
This event is raised if the Text property is changed by either a
programmatic modification or user interaction.
I would do something like this
private void TextBoxExample_TextChanged(object sender, EventArgs e)
{
TextBox box = sender as TextBox;
if (box.Text.Contains("Example"))
{
LabelError.Text = "Error";
}
else
{
LabelError.Text = string.Empty;
}
}
Hope it helps :)
You can also use keyPressEvent to Avoid the entering the numerical values in the textboxes
it will not allow the numerical chars in the text box
private void textboxName_KeyPress(object sender, KeyPressEventArgs e)
{
//not allowing the non character values
if (!char.IsLetter(e.KeyChar) && !char.IsControl(e.KeyChar) && !(e.KeyChar == (char)Keys.Back) && !(e.KeyChar == (char)Keys.Left) && !(e.KeyChar == (char)Keys.Right) && !(e.KeyChar == (char)Keys.Space) && !char.IsPunctuation(e.KeyChar))
{
e.Handled = true;
}
}
I am developing a windows phone app. I want to get the value of the key in which the user is pressing. I want check wheather it is a digit or any other alphabet or special charater. Because my text box is using for entering currency. So I need to prevent users from entering alphabets or any special characters. Only digits are allowed to enter.
This is how I usually reject keystrokes
private void TextBox_KeyDown(object sender, KeyEventArgs e)
{
if (e.Key == Key.D1)
{
// reject this key and do not show in textbox
e.Handled = true;
}
}
Edit: See How to create a numeric textbox in Silverlight? for a more through implementation.
keydown event handler:
KeyEventArgs e
e.Key is enum type Key, you can get character enum from this paramter
To restrict the user in entering digits only, set the inputscope to Number. See this for more details: http://msdn.microsoft.com/en-us/library/windowsphone/develop/gg521152(v=vs.92).aspx
the textbox in Windows Forms used to have a PasswordChar property. In WPF there is an extra control for that: PasswordBox. This wouldn't be a problem but my application runs on an touchscreen only device. Unfortunately the password box does not support the on screen keyboard. I was wondering if there is a way of adding the password char feature to the standard textbox.
This answer may provide you with what you need.
I made my way around this particular problem by creating two Properties for the Password content and binding both of them to the same Model value. One of them (the visible UI Element) binds to Password. The Get on this property of course then returns an array of characters for display. The functions that must use the password text can use the PlainPassword Property.
Adding "UpdateSourceTrigger=PropertyChanged" to the Binding for the textbox causes the characters to appear in the text box as they are typed.
public string Password
{
set
{
Model.Password = value;
OnPropertyChanged("Password");
}
get
{
return new String('●', Model.Password.Length);
}
}
public string PlainPassword
{
set
{
Model.Password = value;
OnPropertyChanged("Password");
}
get { return Model.Password; }
}
I believe the only way you can achieve this is to create your own control based on textbox. Then just bind the actual text property to a property that returns your password character rather than the actual password. Then you can pull the password as a dependency property (though I've heard this is rather insecure, which is why it is not a dependency property in the password box), or just a regular property and access it by passing the whole textbox object.
A simple way to obfuscate the password in a TextBox is to use the Webdings font.
txtInput.FontFamily = new FontFamily("Webdings");
This is not completely safe, but sufficient in most cases. Note that Webdings works better than Wingdings, because Wingdings does not cover the lower case letters and returns everything in upper case.
helló!
im new here but maybe i can help u. i find this -> can be work whit WPF and passwordbox
private void delete_Click(object sender, RoutedEventArgs e)
{
if (pass_passbox.IsFocused == true)
{
pass_passbox.Password= "";
}
}
ofc u do this pass_passbox.Text if its textbox but when change WPF passwordbox u need to write can pass_passbox.Password and u can do changes from screen keyboard .
not fully tested but u can reset this way
and u can do select like this:
string Query = "Select * from [employeeinfo] where username='" + this.txt_user_name.Text + "' and password='" + this.pass_passbox.Password + "' ";
u can see this.pass_passbox.Password is the same at textbox this.pass_passbox.Text
private void txtBoxPassword_TextChanged(object sender, EventArgs e)
{
//password view protection//
txtBoxPassword.UseSystemPasswordChar = true;
}
That's a way to enable the DEFAULT character used for hiding the password from the system,if you wish to set your own password char just substitute the actual line inside the event function with the following:
txtBoxPassword.PasswordChar='*'; //or any other character
I want my C# program to have initial values for its textboxes. For example, in one of the textboxes, it should say "Please enter your name".
When you click (or tabStop) on the textbox, the initial value should disappear and the user will be able to enter their input to the textbox.
I can do all this with click_event, but using this method the initial text would not have less opacity. How am I able to achieve this?
This is how I finally did it:
Boolean first_time_click = true;
private void Form1_Load(object sender, EventArgs e)
{
textBox1.ForeColor = System.Drawing.Color.Gray;
textBox1.Text = "Enter the Text";
}
private void For_First_Click()
{
if (first_time_click)
{
textBox1.Clear();
textBox1.ForeColor = textBox1.ForeColor = SystemColors.WindowText;
}
first_time_click = false;
}
private void textBox1_Click(object sender, EventArgs e)
{
For_First_Click();
}
I assume you are talking about winform (tabstop) you have to handle it within the event key-press. you can use the below code:
TextBox1.Select(0, TextBox1.Text.Length);
this will select the text and window will remove it for you as soon as the user start to typing
you can use the same code to have this behavior also for TabStop
All you need to do is set the Textbox's .Text property and use GotFocus event to clear the box when the person clicks (or tabs) into it to start typing.
Always remember that there are more ways than the mouse to navigate a form, so use the GotFocus event to determine when the user enters a control, and use the Validated event to determine when they've changed data and exited the control.
For this type of effect you need java script.Because java script provide you functionality of mouse hover and mouse out these are the functions which provide you the same functionality which u seeing in this page of search bar. If you need code reply me i can give you.