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25-Jan-2017 08:01

Writing an exception case for each of these would be rather inefficient.A better way is to flip it around and instead of checking that the input is valid (only numbers), we can for Now the textbox will accept number input as well as Backspace, delete, shift, the arrow keys, etc.And now in the markup page(.aspx) have this javascript in the head section of the page: where "text Box1" is the ID you assigned to the text Box in your markup instead.Also, from Javascript, it's very possible that the ID of the text Box has changed once it gets rendered to the page. Net Question Answer site, specially started to allow visitors of this site ask their doubts and queries. Just click the Ask Now button and ask your question now.The Text Box control enables a user to type text into an app. For an example of this, see Scenario 2 of the Context Menu sample. You can get or set the selected text in a Text Box using the Selected Text property.Text Box has a number of features that can simplify text entry. You can change the color used to highlight the selected text by setting the Selection Highlight Color property. You can provide custom handling of the Paste event on editable text controls in your app.

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The text displays on the screen in a simple uniform plaintext format. Handle the Selection Changed event to do something when the user selects or de-selects text.For the example, Suppose we need to validate entered data by user in above created Text Box, for it we need to Text Changed event of textbox1 so we use the Add Handler statement, Add Handler statement allow us to start event handling at any time during program execution means it associates an event with an event handler at run time.Many times it is necessary for a C# Textbox control to only receive only numbers as input.We will look over two common methods that are somewhat limited, and a better alternative at the end (if you are in a hurry, skip to the textbox that handles important non-integer keys). However if we want to write more efficient C# code, it is better and faster to use Regular Expressions.