When there is "Button1.Attributes.Add" ("onclick", "return confirm (' Are you sure you want to save the changes?") ')");” , the workaround to verify that the control is invalidated

Same page with JS and server validation control OnClientClick submit issue

Implementation features:

Clicking the button's OnClientClick event does not affect validation of the server validation control
(The server page is not submitted if the validation does not pass)
Background:
1. There is a server validation control (RegularExpressionValidator) on the same page, multiple
2 a JavaScript function for validation and other functions
3. Button buttons, two events Onclick,onclientclick
Method:

HTML page

Validation controls:

<asp:textbox id= "txt_test" runat= "Server" width= "120px" maxlength= "8" ></asp:TextBox>
<asp:regularexpressionvalidator id= "validator_test" runat= "Server" controltovalidate= "Txt_Test"
Errormessage= "digital" validationexpression= "^/d+$" ></asp:RegularExpressionValidator>

Button:

<asp:imagebutton id= "Btnputin" runat= "Server" text= "Submit" onclick= "Btnputin_click"
Onclientclick= "if (Checkclientvalidate ()) {return checknullvalue ()}" imageurl= ": /images/submit1.gif "/>

Script:

<script type= "Text/javascript" >

Returns whether the server verifies that the control succeeded
Author:add by Aprillee at 2007-12-27
Example:onclientclick= "if (Checkclientvalidate ()) {return checknullvalue ()}"
function Checkclientvalidate ()

{
Page_clientvalidate ();

if (page_isvalid)

{
return true;

}

Else

{
return false;
}
}
The following is a custom scripting feature
function Checknullvalue ()
{
Alert (' Test ');
}
</script>

---------------------This article from Shfongfeng csdn blog, full-text address please click: 5985600?utm_source=copy

When there is "Button1.Attributes.Add" ("onclick", "return confirm (' Are you sure you want to save the changes?") ')");” , the workaround for validating control invalidation is