I am using a NumericUpDown in WinForms and I'm wondering if it is possible to restrict the number of digits. So my max value is set to 9999.99 but you can enter values larger than this. you shouldn't be able to enter more than 4 digits to the left of the decimal and you shouldn't be able to enter more than 2 digits to the right of the decimal. There is another component called DoubleTextBox which uses the NumberFormatInfo.NumberDecimalDigits property to achieve this, but i was wondering if there is something similar for NumericUpDown. I've tried using the KeyDown event to stop the keyboard press but it doesn't work as perfectly. Any help would be great !
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I am creating a WPF application and I am having difficulties implementing masked input onto text boxes.
For example:
User enters 0830, but it is automatically changed to 08:30
Another example:
Entering a contact number like 0895541026 is automatically changed to (089) 554 1026
If entering a currency value then to have a decimal point after the last 2 digits.
Is there a simple way to accomplish this?
I have a textfield in which user enters the amount. Is there a way to format the text in a textfield to display it as a decimal number etc. "123.456,10". I would like to format it as the user types. I tried to play with listener on that field but no luck.. Thanks.
yes.
you have to choose decimal constraint in designer which is also shown in given image
I have a TextBox on WPF that is related to the float variable in my model
Following the TextxBox:
<TextBox Text="{Binding Position, StringFormat=f4}"/>
I want that TextBox will display a maximum 4 numbers after the point.
So I put StringFormat=f4.
But now, even when I have less than 4 numbers after the point and when I have a whole number it displays with 4 digits after the point.
For example, the number 0 is shows that: 0.0000
I want as long as it did not pass the four numbers, display it in a normal way, how can I do this?
you could try with StringFormat="{}{0:0.####}"
This syntax with {} is due to the fact that we set a WPF property equal to a string that contains curly bracket symbols. Curly bracket symbols are interpreted by WPF in a particular way and would not be interpreted as part of the string. Without the {} the code would not compile. {} allows you to set a WPF to a string value that contains curly bracket symbols.
You can have for example a look at the link String formatting in WPF and Silverlight
Take a look at this link about Custom Numeric Format Strings. I think this is what you might be looking for.
Or alternatively, try this;
<TextBox Text="{Binding Position, StringFormat='{}{0:#,0000}'}"/>
Hope this helps! :)
EDIT:
This previous question might help also;
WPF binding StringFormat syntax
I have created a RichTextBox called SharpTextBox which indicates and limits the number of characters that can be typed in it. The implementation is shown in the following link:
http://www.highoncoding.com/Articles/673_Creating_SharpRichTextBox_for_Live_Character_Count_in_WPF.aspx
Anyway when I start typing in the TextBox it goes from 3% to 78%. The TextBox updates the Label control which shows the number of characters remaining for the count.
How can I increase the performance of the textbox?
UPDATE:
I read there seems to be some problem with the TextRange.Text property which kills performance.
Ok I have the following problem in Silverlight. I have a control with 2 columns. On the left is a stack panel with line numbers and on the right is a textBox.
So when I write in textBox without wrapping turned on I can simply create the right count of numbers on the left, because I'm searching for '\r' in text.
But when I turn on wrapping I have no control over the count of lines in textBox.
Is there a way to get to that count? Or a way to know which line in textBox is going to wrap?
I hope you can understand what I'm trying to do.
There's one way to do this. You can simulate the word wrap operation in the background using a TextBlock. Here is a good link of the complete solution to this problem.
Extended TextBox control with MaxLines property
Is it not possible to create your items in code before they are passed to the view. This would enable you to bind a list of items to a listview and style them as you wish.
You need to user a value converter to count the number of char / lines and then trim that number if you wish to. Unless you use fixed width, you can't really count or calculte in advancet the size, since each application might be displayed differently (due to different sizing option).
There are two great sample chapters on Windows Phone and Silverlight for Windows Phone on the LearningWindosPhone.com site. There is great Windows Phone Trainng material , and dont forget the Windows Phone Develoeprs Blog
Yes there is a way to get the number of lines occupied by the text in the textbox. It's not that simple though 'coz you have to simulate the behavior of the word wrap in order to count/predict the number of lines generated as a result of a word wrap. I have the solution described here in detail.