Customvalidator for ASP. NET verification controls

Customvalidator is a user-defined verification control that responds to user-defined verification. The JS client functions can be written in the background.CodeServer verification function in.

The following are common attributes of customvalidator:

Attribute	Description
Backcolor	Background color.
clientvalidationfunction	specifies the name of the custom client script function used for verification. note: the script must be written in a language supported by the browser, for example, VBSCRIPT or JScript when VBScript is used, the function must be in the form: sub functionname (source, arguments) If JScript is used, the function must be in the form: function functionname (source, arguments)
controltovalidate	ID of the input control to be verified.
display	verify the display behavior of error messages in the control. valid values: · none-the verification message is not displayed inline. · static-allocate space in the page layout for displaying verification messages. · dynamic-If verification fails, dynamically Add the space used to display verification messages to the page.
Enableclientscript	Boolean value indicating whether client verification is enabled.
Enabled	Boolean value indicating whether to enable the verification control.
Errormessage	The text of the error message displayed in the validationsummary control when verification fails. Note: If the errormessage attribute is set but the text attribute is not set, the value of the errormessage attribute is also displayed in the verification control.
Forecolor	The foreground color of the widget.
ID	The unique ID of the control.
Isvalid	Boolean value indicating whether the associated input control has passed verification.
Onservervalidate	Specifies the name of the script function to be executed on the server.
Runat	Specifies that the control is a server control. Must be set to "server ".
Text	Text displayed when verification fails.

 

Learn how to use customvalidator

 

 <%  @ Page Language  =  "  C #  "  Autoeventwireup  =  "  True  " Inherits  =  "  Default2  "  Codebehind  =  "  Default2.aspx. CS  "   %>  <! Doctype HTML public "-// W3C // dtd xhtml 1.0 transitional // en" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"  >  <  Html  Xmlns  = "Http://www.w3.org/1999/xhtml"   >  <  Head  Runat  = "Server"  >      <  Title  > Custom Controls</  Title  >      <  Script  Type  = "Text/JavaScript"  Language  = "JavaScript"  >      Function  Clientv (S, e) {e. isvalid  =  (E. Value =  "  Client  "  );}  </  Script  >  </  Head  >  <  Body  >      < Form  ID  = "Form1"  Runat  = "Server"  >      <  Div  >  Client Verification  <  ASP: textbox  ID  = "Txtclient"  Runat  = "Server" > </  ASP: textbox  >                      <  ASP: customvalidator  ID  = "Customvalidator2"  Runat  = "Server"  Controltovalidate  = "Txtclient"  Errormessage  = "Client Verification Failed"  Clientvalidationfunction  = "Clientv" Forecolor  = "Red"  > </  ASP: customvalidator  >                          <  BR  />  Server Verification  <  ASP: textbox  ID  = "Txtserver"  Runat  = "Server"  > </ ASP: textbox  >                      <  ASP: customvalidator  ID  = "Customvalidator1"  Runat  = "Server"  Controltovalidate  = "Txtserver"  Errormessage  = "Server Verification Failed"  Onservervalidate  = "Server_servervalidate"  Forecolor = "Red"  > </  ASP: customvalidator  >                  </  Div  >          <  ASP: button  ID  = "Button1"  Runat  = "Server"  Onclick  = "Button#click"  Text  = "Submit"  />      </  Form  >  </  Body  >  </  Html  > 

 

 

Server verification function written in CS File

 

//Server Verification MethodProtected VoidServer_servervalidate (ObjectSource, servervalidateeventargs ARGs) {args. isvalid= (ARGs. value ="Server");}
 

 

 

The client prompts that the verification failed and no information is submitted at this time, so the server verification will not be executed.

The client passes the verification and the server fails the verification.

 

One thing to note is that customvalidator does not verify the content with null values or all spaces. This can be used with other controls mentioned earlier.