To assign the value of a variable that is in a Javascript function, for an SQL query.

Question

To assign the value of a variable that is in a Javascript function, for an SQL query.

Asked 10 years, 6 months ago

Viewed 1,757 times

3

I have a javascript function that gets the value of the selected item in a combobox, and would like to pass this value as parameter to an SQL query to bring the data that is related to the value obtained in the combobox Selected on my Asp page, follows my javascript function and my SQL query.

function obterOpcaoSelecionada(){
//obter o elemento select
var formu = frmDados.cb_catinsumo.value;

//obter o índice da opção selecionada
var indiceSelecionada = elem.options.selectedIndex;
}

SQL code:

    SELECT 
    id_insumo,nome_comercial 
FROM 
    tb_insumo
WHERE 
    id_catinsumo = 
            (   SELECT 
                    id_catinsumo as id
                FROM
                    tb_catinsumo
                WHERE
                    categoria_insumo ='parametroJavaScritp' 
            ) 
ORDER BY 
    nome_comercial

Everton, you’ll have to use AJAX. Do you know how to use it? Either pure javascript or use a library like jQuery or Mootools?

– Sergio

2014/04/24 at 17:40
@Sergio never used AJAX, it would be good to learn ,I’m using pure javascript, but I can use a jQuery library if applicable.

– Everton

2014/04/24 at 17:42
You are using pure Asp or Asp.net?

– Marciano.Andrade

2014/04/24 at 18:38
I am using pure Asp @Marciano.Andrade.

– Everton

2014/04/24 at 19:46
What programming language are you using on Asp? You can use a 'hiddenfield' object and via javascript you fill this 'hiddenfield', reading it in codebehind. Example: I fill the 'hiddenfield' via javascript and in my C# code I read this 'hiddenfield' to search the database.

– Gustavuu

2014/04/24 at 20:00
@Gustavuu was exactly what I was thinking, he does not need to create a [Webmethod] for this, following the way you said I believe to be the fastest

– Marciano.Andrade

2014/04/25 at 11:25
@Marciano.Andrade I am using Vbscript on Asp.

– Everton

2014/04/25 at 13:23

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by Paulo • **9,980** points · Answer 1 · 2014-04-24T18:33:21+00:00

You can use jQuery.ajax() to perform this procedure.

Example

var request = $.ajax({
    url: "pagina_que_fara_a_consulta.php",
    type: "POST",
    data: { sua_variavel : conteudo },
    dataType: "html"
});

request.fail(function( jqXHR, textStatus ) {
    alert( "Request failed: " + textStatus );
});

See more in https://api.jquery.com/jQuery.ajax/