How to create numeric textbox

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I want to create numeric textbox, which is retrieve numeric type value only and accepts only numeric values. For example we create textbox in asp.net we retrieve the values use TextBox1.Text, at the same time we get the numeric values, We should give
Convert.ToDouble(TextBox1.Text). So How to get the numeric value without giving Convert.Todouble() function, like TextBox1.NText which is giving numeric value. How to create it. Please anybody help me.

Thanking u

Posted 9-May-12 19:18pm

devausha

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Comments

walterhevedeich 10-May-12 1:39am

Really? TextBox class has a NText property?

Sergey Alexandrovich Kryukov 10-May-12 1:42am

:-)

Sergey Alexandrovich Kryukov 10-May-12 1:42am

What have you done so far? What's the problem?
--SA

3 solutions

Solution 1

You could create a custom control which either derives from a textbox, or encapsulates a textbox and contains an AsDouble property which does the conversion. It's a sledgehammer to crack a teeny tiny nut though.
Alternatively, you could use Google: Numeric textbox asp.net[^] - there are quite a few out there which also restrict the input to numeric values.

Posted 9-May-12 19:41pm

OriginalGriff

Solution 2

Go through this

Creating a Numeric TextBox Control[^]

Posted 9-May-12 19:46pm

P.Salini

Comments

devausha 10-May-12 1:51am

I refer this site. It is used for accepts only numeric values. But I also want to get only numeric values. When I save, If the numeric textbox is empty, the error occured, 'Could not convert nvarchar to numeric'. So,
If I save without value in the numeric textboxes it automatically get 0 value. How to change the code in that article. Please help me.

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Sandeep Mewara · Accepted Answer · 2012-05-09T19:54:00

Solution 3

create numeric textbox
Method 1: Mask your textbox to only accept numbers. It will not take any alphabet or special characters as input through UI. You can do this using Regular expression & Javascript
Method 2: Create a custom control that looks like a textbox but only takes numbers. Expose a NText property to it that will give you the number equivalent of the text entered.
Method 3: Change the behaviour of your existing normal textbox. Override the .Text method or method and put your logic of only extracting numbers from whatever was entered and return back that result.

Try anything based on your ease and requirement.

Posted 9-May-12 19:54pm

Sandeep Mewara

Updated 9-May-12 19:56pm

v3

Comments

devausha 10-May-12 1:56am

I want to create Numeric TextBox using Method2. But I didn't know how to create NText Property. Please help me.
Already I am using Custom Controls, But this is not have NText Property, It has only NumberofInteger,NumberofFraction Property.

Sandeep Mewara 10-May-12 2:07am

Add the new property and handle it in get-set.

Read about Custom controls then.

Look this video: www.youtube.com/watch?v=U44q2fdgWu0
Example CustomTextbox control: http://www.codeproject.com/Articles/15637/ASP-NET-Required-TextBox-Graphical-RequiredFieldVa

devausha 10-May-12 2:15am

Thank you So much

Sandeep Mewara 10-May-12 2:33am

Welcome.