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This article mainly explains the "ASP.NET data verification team how to understand", the article explains the content is simple and clear, easy to learn and understand, the following please follow the editor's ideas slowly in-depth, together to study and learn "ASP.NET data verification team how to understand" it!

ASP.NET data validation is to prevent users from entering the wrong data or missing the data that must be filled in, which leads to unnecessary errors on the server. ASP.NET has validation controls to facilitate data verification, but sometimes there are problems of one kind or another. I encountered one today. Let's talk about the verification control.

< asp:TextBox ID= "TextBox1" runat= "server" > < / asp:TextBox > < asp:RequiredFieldValidator ID= "RequiredFieldValidator1" ControlToValidate= "TextBox1" runat= "server" ErrorMessage= "RequiredFieldValidator" > < asp:Button ID= "Button1" runat= "server" Text= "Button1" / >

The above ASP.NET data validation code implements the most basic verification. If the user clicks Button1 without entering information, then the ErrorMessage will be displayed.

< asp:TextBox ID= "TextBox1" runat= "server" > < / asp:TextBox > < asp:RequiredFieldValidator ID= "RequiredFieldValidator1" ControlToValidate= "TextBox1" runat= "server" ErrorMessage= "RequiredFieldValidator" > < asp:Button ID= "Button1" runat= "server" Text= "Button1" / > < asp:Button ID= "Button2" runat= "server" Text= "Button2" / >

In the above ASP.NET data validation code, if the user clicks Button1 or Button2 without entering information, the ErrorMessage will be displayed. What if I don't want Button2 to trigger validation? Easy to do, add an attribute to Button2 CausesValidation= "false" as follows

< asp:TextBox ID= "TextBox1" runat= "server" > < asp:RequiredFieldValidator ID= "RequiredFieldValidator1" ControlToValidate= "TextBox1" runat= "server" ErrorMessage= "RequiredFieldValidator" > < / asp:RequiredFieldValidator > < asp:Button ID= "Button1" runat= "server" Text= "Button1" / > < asp:Button ID= "Button2" runat= "server" Text= "Button2" CausesValidation= "false" / >

In this way, if the user clicks Button2 ErrorMessage directly without entering information, it will not appear.

But sometimes we need to validate different information on the same page. You certainly can't add the CausesValidation= "false" of the button. We need to add the ValidationGroup attribute.

< asp:TextBox ID= "TextBox1" runat= "server" > < asp:RequiredFieldValidator ID= "RequiredFieldValidator1" ControlToValidate= "TextBox1" ValidationGroup= "basicInfo" runat= "server" ErrorMessage= "error form textbox1" > < / asp:RequiredFieldValidator > < asp:Button ID= "Button1" ValidationGroup= "basicInfo" runat= "server" Text= "Button1" / > < asp:TextBox ID= "TextBox2" runat= "server" > < / asp:TextBox > < asp:RequiredFieldValidator ID= "RequiredFieldValidator2" ControlToValidate= "TextBox2" ValidationGroup= "moreInof" Runat= "server" ErrorMessage= "error form textbox2" > < / asp:RequiredFieldValidator > < asp:Button ID= "Button2" ValidationGroup= "moreInof" runat= "server" Text= "Button2" / >

This enables you to click on Button to only trigger ASP.NET data validation for a particular button without affecting other button

Summary: use the ASP.NET data validation validation group to group validation controls on a page. Validation can be performed on each verification group, independent of other verification groups on the same page.

A verification group can be created by setting the ValidationGroup property of all controls to be grouped to the same name (string). You can assign any name to the verification group, but you must use the same name for all members of the group.

Thank you for your reading, the above is the content of "how to understand the verification team in ASP.NET data verification". After the study of this article, I believe you have a deeper understanding of how to understand this problem in the verification team of ASP.NET data verification. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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