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I have kept this article very simple so that anyone can implement basic validation of entering the numeric values in the textbox on their web page. Best practise is to do validation on both the side. So today we learn how to restrict the user only to enter numeric values in the input textbox field also allow decimal values. Before writing any code, first, we will download and add latest jQuery file into our Web page. You can host the jQuery file on the server, or you can direct use the Google-hosted jQuery library.
Here we are adding two textboxes in our web page for validation. In the first textbox will allow only numeric values no dot or decimal. In the second textbox will allow entering numbers as well as decimal values. This is how our HTML look like as shown below. On its input event will restrict numbers characters only.
If you enjoyed this post, please support the blog below. It's FREE! Get the latest Asp. Actually it won't allow non numeric characters. In this blog jQuery plugin taking sometime to load onlines that's why it's allowing non numeric values during plugin load. If you add jquery plugin in your local folder it won't take much time to load and it won't allow non numeric characters.
Introduction :. Now I will explain how to allow only numbers in textbox using JQuery. To restrict user to enter only numbers in textbox we need to write the following code. Live Demo. To check Live demo try to enter characters in below textbox. Enter Text:. Newer Post Older Post Home. Subscribe to: Post Comments Atom.
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EDIT: I edited my example above so that there can only be one period, preceded by at least one digit and followed by at least one digit.
The accepted solution is not complete, since you can enter multiple '. Here is one more solution which allows for decimal numbers and also limits the digits after decimal to 2 decimal places. All solutions presented here are using single key events. This is very error prone since input can be also given using copy'n'paste or drag'n'drop. I suggest rather than checking every key press you check whether the result is valid in respect to your expectations.
The oninput event is triggered just after something was changed in the text area and before being rendered. You can extend the RegEx to whatever number format you want to accept. This is far more maintainable and extendible than checking for single key presses.
Just need to apply this method in Jquery and you can validate your textbox to just accept number with a decimal only. For anyone stumbling here like I did, here is a jQuery 1.
Suppose your textbox field name is Income Call this validate method when you need to validate your field:.
Extending the rebisco's answer. I observed that for all the answers provided here, the things are not working if we select some portion of the text in textbox and try to overwrite that part.
So I modified the function which is as below:. For Decimal numbers and also allowing Negatives numbers with 2 places for decimals after the point I modified the function to:.
This works for me:. Working on the issue myself, and that's what I've got so far. This more or less works, but it's impossible to add minus afterwards due to the new value check. Also doesn't allow comma as a thousand separator, only decimal. I know that this question is very old but still we often get such requirements. There are many examples however many seems to be too verbose or complex for a simple implimentation.
I chose to tackle this on the oninput event in order to handle the issue for keyboard pasting, mouse pasting and key strokes. Pass true or false to indicate decimal or integer validation.
It's basically three steps in three one liners. If you don't want to truncate the decimals comment the third step.
Adjustments for rounding can be made in the third step as well. Example : 48 to 57 for numeric values 0 to 9. Learn more. Restricting input to textbox: allowing only numbers and decimal point Ask Question. Asked 9 years, 11 months ago.
You cant use e.
Change it to keydown. It's used for cost of products so allows positive decimal values only. Can be refactor very easy to allow negative or just integer digits.
This thread mentions the same plugin along with a bunch of other things you could try. It will allow only 1 to 9 numbers and decimal. If other characters are being inserted, it will replace those digits. Check in fiddle. Learn more. Ask Question. Asked 7 years, 6 months ago.
Active 6 months ago. Viewed 76k times. Thomas Thomas Active Oldest Votes. Johan Johan Thomas I thought you wanted to allow 1 "dot"? Or shouldnt it be allowed at all?
Text box should only accept only numbers and dot
I know this is an old post, but it's obviously still helpful because it helped me! Anyway, you haven't included the keypad's decimal, keyCode You could remove the non numeric char when keyup. It should not be multiple ". Isn't it? Shira Asulin Shira Asulin 61 7 7 bronze badges. Adak Mar 20 at Ryan S Ryan S 4, 1 1 gold badge 13 13 silver badges 14 14 bronze badges.
Carlos Toledo Carlos Toledo 1, 16 16 silver badges 21 21 bronze badges.NET Articles,Gridview articles,code examples of asp. If you enjoyed this post, please support the blog below. It's FREE! Get the latest Asp.
I really Appreciate U to Post this Webpage. To arrange live demo in website i did this sample using html controls because of that small problem is there with backspace or delete buttons. Hi this is good but this text box is unable to edit or delete the text we have entered if we does not found an edit option, it is of useless.
Thanks Ganesh. Can you help this. Pls mail to:v. Its a good example for restricting in the asp. But I have a question: how to get data from database using onkeyup event of the textbox.
To implement this you need to write below code in your aspx page. Please enter text in below textbox. After that here we will see how to restrict user to enter only alphanumeric in textbox. Newer Post Older Post Home. Subscribe to: Post Comments Atom. Interview Questions in ASP. NET Framework Simple login form example in asp. Search This Site. Step By Step Tutorials Asp. Get Latest articles in your inbox for free.
Note that you have to escape the period with a backslash otherwise it stands for 'any character'. The brackets mean " any character inside these brackets. The backslash is used as an escape character for the period, because period usually stands for " any character.
Click here for example. Learn more. Allow only numbers and dot in script Ask Question. Asked 8 years ago. Active 2 months ago. Viewed k times. Active Oldest Votes. Vishal Patel Vishal Patel 1 1 silver badge 5 5 bronze badges. This is a great place to use regular expressions.
Hope this helps! Is matches supposed to be match? Thanks for your answer. If you're looking to not match the dot alone ". Use Jquery instead. Pang 7, 16 16 gold badges 70 70 silver badges bronze badges.
Gua Syed Gua Syed 1 1 silver badge 4 4 bronze badges. Sam 1, 1 1 gold badge 8 8 silver badges 21 21 bronze badges. Kichu Baai Kichu Baai 71 1 1 silver badge 1 1 bronze badge. Please explain what you did. Vishal Viradiya Vishal Viradiya 33 4 4 bronze badges.