CODEWITHSUNDEEP
asp-classicselectlistdisabled-inputselectlistitem
Ken Gutterson
Ken Gutterson

Reputation: 1

Disabling default null value ASP select list

I am trying to disable the default value for an asp select list, the default value being the string "null".

I want this to remain as the default, but when the user has selected another item in the select list to disable it as a selectable option.

The ASP code for the select list is below: 

Response.Write "<Select name=""PersonID" & temporary.Fields("EventID") & class=""SelectText"" style=""width:100%"">" & vbCrLf &_
"<Option value=""NULL""></Option>"

Upvotes: 0

Views: 437

Answers (2)

user1945782
user1945782

Reputation:

Alternatively to Zee Tee's answer, you could read the value on post back and determine its value...

<select id="personId" name="personId<%=eventId%>" class="selectText">
    <option value="-1">-- Please select a value --</option>
    <option value="1">......</option>
</select>

...and the postback code...

Dim personId, failForm
personId = Request.Form("PersonId")
failForm = (personId = -1)

Upvotes: 1

Control Freak
Control Freak

Reputation: 13233

Not sure why you would need to do this, usually you convert the empty value to null in your backend script if needed, or you can use something like jQuery to do this client-side, hoping that your browser has javascript enabled:

$("select").change(function(e){ 
    $("option[value='NULL']:first",this).remove(); 
});

This will remove the first null option in your select list on change. If you need more help with javascript/jquery, you should tag your questions as so.

Upvotes: 1

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