Regular Expressions Public Class Form1 Private Sub Button1_Click(By Val sender As System. Click Dim phone Number As New Regex("\d-\d-\d") If phone Number.

validating data in vb-28validating data in vb-78

The alternative to processing data validation on the user's computer is to process it on the Web server.

The opposite pros and cons that applied to processing data validation on the user's computer apply to processing data validation on the Web server.

Rad Grid View exposes a property - Validates On Data Errors - that controls the way the data validation, provided by IData Error Info and INotify Data Error Info Interfaces, is performed. Length When you try to enter an order number that has fewer than five characters, you should see a validation message that is similar to the one in Figure 2. Is Valid property to False, this will cancel the editing process and will return focus to the invalid Grid View Cell. In this case, you need to throw an exception when an incorrect value is about to be set.

It may be set to one of the following values: In R2 2016, Telerik introduced the Validation Type property of Rad Grid View. This results in a binding validation error (Figure 3) and the Grid View Bound Column Base editor will enter into an invalid state.

At this moment, a Cell Validating event is fired and since the new value is not committed yet to the underlying data object, here is the perfect place for applying a custom UI validation. The Row Validating event is very similar to the Cell Validating event. Once you have added such errors, you will have to explicitly clear them when needed.

Example 3 shows how to validate the Order No property of the Order object to be longer than 5 characters. However, instead of getting an individual cell, you are getting an entire row. Please check this help article for information about how to clear user defined errors. Example 7 shows you how to use Data Annotations in order to validate the Order NO property of the Order object.Data validation features enable you to take complete control of the data entered in your grid's cells. This is the validation that is built into the business object implementation.The purpose of this tutorial is to show you how to validate data using Rad Grid View. An alternative approach is to use validation on a property level as shown in Example 4.Users with harmful intent may easily modify the validation script because it is contained in the source of the page that is sent to the user's computer.The malicious user can then submit the modified script to the Web server with results that are different than what you, the developer, intended.A slightly negative aspect of validating data on the user's computer is that the validation is performed via a script residing in the Web page. You only have two possible scripting languages that you can use on a user's computer: VBScript or Java Script.