vb.net form and jquery validation

Question

i have a vb.net form button that go through a jquery validation before excude a function in the code behind , actually in either ways if the validation is true or false the function stopped and never call the vb.net function how can i make the it proceed to the code behind ?

vb.net form (textbox and button )

      <asp:TextBox ID="ToCc" runat="server"></asp:TextBox>
    <asp:Button ID="emailSend" runat="server" Text="send" />

jquery :

   $("#<%=emailSend.ClientID %>").click(function(){
          if($("#<%=ToCc.ClientID %>").val() == ""){
            alert("this fienld can't be empty") ; 
            return false ; 
          } else{
    return true ; 
}

         });

the email click vb function is

 Protected Sub emailSend_Click(ByVal sender As Object, ByVal e As EventArgs) Handles 

    emailSend.Click

   MsgBox("do any thing ") 

   End Sub

you can declare the method shared and decorate it with [WebMethod] attribute and then call that method using jquery ajax to send email asynchronously if you want to use jquery — Devjosh
– Devjosh, Commented May 25, 2012 at 17:15

Babak Naffas · Accepted Answer · 2012-05-25 17:54:24Z

1

You haven't assigned your emailSend_Click method as the event handler for the button. Secondly, you can use the RequiredFieldValidator to accomplish your validation goals.

Try <asp:Button ID="emailSend" runat="server" Text="send" onclick="emailSend_Click" />

Additionally, remove the statement emailSend.Click from your code behind. You are already in the click event handler.

edited May 25, 2012 at 17:54

answered May 25, 2012 at 16:57

Babak Naffas

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1 Comment

Andrew Morton Over a year ago

@MinaGabriel Why the insistence on using jquery? If you use a RequiredFieldValidator then it will automatically do the check server-side too, which you must do anyway - never trust the data sent back from the client.

Frenchi In LA · Accepted Answer · 2012-05-25 17:23:05Z

0

this is jquery version

$('input[id$=emailSend]').click(function(){
if($('input[id$=ToCc]').val() == ''){
            alert("this fienld can't be empty") ; 
            return false ; 
          } 
});

answered May 25, 2012 at 17:23

Frenchi In LA

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Comments

RemarkLima · Accepted Answer · 2012-05-25 17:55:12Z

0

More concise and a little more "jQuery"'d:

$("#<%=emailSend.ClientID %>").click(function(event) { 
      if($("#<%=ToCc.ClientID %>").val() == "") { 
        alert("this field can't be empty") ;  
        event.preventDefault(); 
      }  
});

By default it'll return true if everything is OK.

answered May 25, 2012 at 17:55

RemarkLima

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4 Comments

Frenchi In LA Over a year ago

$("#<%=emailSend.ClientID %>") will look for an element with <%=emailSend.ClientID %> as ID look at SLAKS comment

RemarkLima Over a year ago

Erm, no it'll not, the <%= emailSend.ClientID %> will write the full client ID to the script when the page loads as it's ASP.NET - I've done this many times without any problems. Using a attribute search just puts more load on the browser to search the DOM.

Frenchi In LA Over a year ago

You can't use it in a separate js file anyway

RemarkLima Over a year ago

That is true, and a good point to bear in mind should you site be laid out this way.

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