Forma convalida
-
10-12-2019 - |
Domanda
Sono nuovo in JavaScript.Voglio convalidare un modulo con cinque colonne.
formdescription
Il mio modulo contiene 5 campi di input e un tasso di invio
Voglio il seguente output
1. Invia il pulsante disabilitato.
2. Tutti i campi sono il pulsante Enter verrà abilitato.
o altrimenti
1.Displaying una casella di avviso .. come "Tutti i campi sono devono essere inseriti"
Grazie.
Soluzione
If it is SharePoint List form, you can simply make the fields as Required and SharePoint will handle it...
But if its some other form, which I think it is... you can use JavaScript like this:
<script type="text/javascript">
function onSubmitValidation() {
if (TrimAll(document.getElementById("field1").value) == "") {
alert('All fields are must be enter');
return false;
}
if (TrimAll(document.getElementById("field2").value) == "") {
alert('All fields are must be enter');
return false;
}
// check for rest of the fields - field3, field4, field5
return true;
}
function TrimAll(s) {
var l = 0; var r = s.length - 1;
while (l < s.length && s[l] == ' ')
{ l++; }
while (r > l && s[r] == ' ')
{ r -= 1; }
return s.substring(l, r + 1);
}
</script>
HTML can look like:
Fields <input type="text" id="field1" /><input type="text" id="field2" /><input type="text" id="field3" /><input type="text" id="field4" /><input type="text" id="field5" />
<asp:Button ID="btnSubmit" Text="Submit" OnClientClick="onSubmitValidation" OnClick="btnSubmit_Click" />
However if you want to utilize input fields in Server-Side code then replace <input
with <asp:TextBox
Javascript change:
Replace document.getElementById("field1").value
with document.getElementById("<%= field1.ClientID %>").value
HTML change:
Replace <input type="text" id="field1" />
with <asp:TextBox ID="field1" runat="server"
/>
Altri suggerimenti
function button_action(){
if(!document.myform.field1.value)
{
alert("enter fields1");
document.myform.field1.focus();
return false;
}
if(!document.myform.field2.value)
{
alert("enter fields2");
document.myform.field2.focus();
return false;
}
if(!document.myform.field3.value)
{
alert("enter fields3");
document.myform.field3.focus();
return false;
}
if(!document.myform.field4.value)
{
alert("enter fields4");
document.myform.field4.focus();
return false;
}
if(!document.myform.field5.value)
{
alert("enter fields5");
document.myform.field5.focus();
return false;
}
alert("congrats");
}
<form name="myform">
<input type="text" name="field1" size="10" />
<input type="text" name="field2" size="10" />
<input type="text" name="field3" size="10" />
<input type="text" name="field4" size="10" />
<input type="text" name="field5" size="10" />
<input type="button" value="submit" onclick="button_action()" />
</form>