C# pre validation check for textbox entering only specified numbers
![c# pre validation check for textbox entering only specified numbers c# pre validation check for textbox entering only specified numbers](https://i.stack.imgur.com/0m26o.png)
- C# pre validation check for textbox entering only specified numbers code#
- C# pre validation check for textbox entering only specified numbers series#
C# pre validation check for textbox entering only specified numbers code#
I also check if the text contains a comma ',' and throw an exception if found because the parsing function does not see the comma as an exception.Ĭopy Code private void validateTextCharacter( object sender, EventArgs e)Ĭhar UnallowedCharacters = I check the text and if it's equal to the minus sign, I leave it as it is because the parsing function would throw an exception if the text is only a minus sign. I catch it and remove the new character that made this exception then I rearrange the Textbox cursor back to its place. I parse the text to a double and if all is ok, nothing will be changed but the parsing function throws an exception. I check the text and if it's equal to the minus sign I leave it as it is because the parsing function would throw an exception if the text is only a minus sign.Ĭopy Code private void validateTextInteger( object sender, EventArgs e) I parse the text to an integer and if all is ok, nothing will be changed but if the parsing function throws an exception, I catch it and remove the new character that made this exception then I rearrange the textbox cursor back to its place. These three functions are normal validation functions, to make them more flexible I made another three customized functions and they will be discussed in detail in the Customized Validations section. To use any of these functions, the user simply selects a Textbox then goes to the actions panel and on the " TextChanged" row, he selects one of these three functions according to the exception handling he desires.
![c# pre validation check for textbox entering only specified numbers c# pre validation check for textbox entering only specified numbers](https://www.w3resource.com/w3r_images/form-validartion-field-level.png)
The validateTextInteger() function permits the user to only type positive or negative Integer values, the validateTextDouble() function permits the user to write positive or negative double values only and finally the validateTextCharacter() function only allows the user to write alphabetical characters. There are three main types of functions I used for the " TextChanged" action and they are: I mainly work on the " TextChanged" action of the TextBox. The way of doing this is quite simple and straight forward. In this article, I do the Textbox exception handling in a different, easy and flexible way. All the code I've found on the net tackles this issue with regular expressions, it works well but has some limitations. Usually the handling of a Textbox is the process of permitting the user to write only numbers (whether integers or real) or alphabetical characters. Selecting a region changes the language and/or content on a Textbox exception is a very common task and found in nearly every GUI.
![c# pre validation check for textbox entering only specified numbers c# pre validation check for textbox entering only specified numbers](https://i.stack.imgur.com/3NVH5.jpg)
Click each field to change its properties. If you are changing the properties of multiple fields, you can leave the Properties dialog box open. When selected, prevents any further changes to any form field properties.Ĭloses the form field Properties dialog box. If you select one on any tab, a check mark will appear, and the option will be checked on all tabs. The Options tab appears for most form field types but the options available are unique to each type of form field. Other tabs appear only in specific types of form fields. When you change a property, it is applied as soon as you select another property or press Enter.Īll types of form fields have a General tab and an Actions tab.
C# pre validation check for textbox entering only specified numbers series#
The properties for each type of form field are selected on a series of tabs. You can set various properties for an Acrobat form field, depending on the form field type. You can set properties that apply formatting, determine how the form field information relates to other form fields, impose limitations on what the user can enter in the form field, trigger custom scripts, and so on. How a form field behaves is determined by settings in the Properties dialog box for that individual field.