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09.14.2006 at 01:02PM PDT, ID: 21990042
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6.2

Classic ASP VBScript:  Server-Side Form Validation

Asked by lshane in Active Server Pages (ASP)

Tags: , , , ,

Hello.  I am using Classic ASP VBScript.  I am testing server-side validation with a small, 2-field form.  I think I may be on the right track, but I'm unsure how to separate the 2 fields and I would like to retain the entered value for the correct field when the page displays error for the incorrect field.  It is validating for a numeric entry on both fields.

Here's a link to the form: <www.lghmedia.com/test/test_form.asp>

2 files:  <test_form.asp> and <test_form_process.asp>.

"Test_form.asp" has 2 fields:  {numProd, numVend}.

The "test_form.asp" file submits to "test_form_process.asp" for validation.  I created a separate "IF...THEN" statement for each form field which redirect back to the "form_test.asp" page with a respective variable if not validated:

=========================================================
<% If Not IsNumeric(Request.Form("numProd")) Then
      Response.Redirect("test_form.asp?error=numProdnotnumeric")
END IF
%>

<% If Not IsNumeric(Request.Form("numVend")) Then
      Response.Redirect("test_form.asp?error=numVendnotnumeric")
END IF
%>
=========================================================
=========================================================

Here is the code for the error messages to display on "test_form.asp"

=========================================================
<table width="400" border="0" align="center" cellpadding="0" cellspacing="0">
     
            <% If Request.QueryString("error") = "numProdnotnumeric" Then %>
            <tr>
        <td colspan="2"><font color="#FF0000">Please enter a quantity of products.</font></td>
        </tr>
            <%END IF%>
      <tr>
        <td width="120">Number Products:</td>
        <td width="280"><input name="numProd" type="text" id="numProd" size="30"></td>
      </tr>

        <% If Request.QueryString("error") = "numVendnotnumeric" Then %>
      <tr>
        <td colspan="2"><font color="#FF0000">Please enter a quantity of vendors.</font></td>
        </tr>
      <%END IF%>
      <tr>
        <td>NumberVendors:</td>
        <td><input name="numVend" type="text" id="numVend" size="30"></td>
      </tr>
      <tr>
        <td>&nbsp;</td>
        <td><input type="submit" name="Submit" value="Submit"></td>
      </tr>
    </table>
=========================================================
=========================================================

1) How can I get the display for each invalid field?
2) After being redirected due to an invalid entry, how can I get the fields to retain the entries that were made?


Thanks so much,
ShaneStart Free Trial
[+][-]09.14.2006 at 01:23PM PDT, ID: 17524080

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About this solution

Zone: Active Server Pages (ASP)
Tags: asp, classic, form, validation, vbscript
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Solution Provided By: b0lsc0tt
Participating Experts: 2
Solution Grade: A
 
 
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