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I need to format and validate a data field using the property OnBlur of Javascript within the codebehind C#. The problem is that it executes the javascript function and does not return the value to the field. I have two questions about this:
1st - What can be happening?
2º - There is another way to format Asp:Textbox without going to the server?
Follows the code:
Page_load
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
this.txtData.Attributes.Add("onblur", "formataData(this.value = this.value, event)");
}
}
<asp:TextBox ID="txtData" MaxLength="10" runat="server" class="form-control" Width="118px" EnableViewState="false" AutoPostBack="true"></asp:TextBox>
Javascript
function formataData(campo, evt) {
var xPos = PosicaoCursor(campo);
//dd/MM/yyyy
evt = getEvent(evt);
var tecla = getKeyCode(evt);
campo = validaData(campo)
if (!teclaValida(tecla))
return;
vr = campo = filtraNumeros(filtraCampo(campo));
tam = vr.length;
if (tam >= 2 && tam < 4)
campo = vr.substr(0, 2) + '/' + vr.substr(2);
if (tam == 4)
campo = vr.substr(0, 2) + '/' + vr.substr(2, 2) + '/';
if (tam > 4)
campo = vr.substr(0, 2) + '/' + vr.substr(2, 2) + '/' + vr.substr(4);
MovimentaCursor(campo, xPos);
return campo
}
function validaData(strdata) {
//strdata = strdata;
var dia = strdata.substring(0, 2);
var mes = strdata.substring(2, 4);
var ano = strdata.substring(4, 8);
//var date = new Date();
//console.log(date instanceof Date && !isNaN(date.valueOf()));
if (strdata.length == 0) {
return false;//exit function
}
if (strdata.indexOf("/") == 3 && strdata.lastIndexOf("/") == 6) {
return false;//exit function
}
if (strdata.length != 8) {
alert("Data deve ser escrita da forma DDMMAAAA.");
return false;
}
strdata = strdata.replace("/", "");
if (dia > 31 || mes > 12) {
alert("Data inválida.");
return false;
}
if ((mes == 4 || mes == 6 | mes == 9 | mes == 11) && dia > 30) {
alert("Data inválida.");
return false;
}
if (mes == 2) {
if ((((strdata %= 4) == 0 && ((strdata %= 100) != 0 || (strdata %= 400) == 0)) == false) || dia > 28) {
alert("Data inválida.");
return false;
}
}
return strdata;
}
//descobre qual a posição do cursor no campo
function PosicaoCursor(textarea) {
var pos = 0;
if (typeof (document.selection) != 'undefined') {
//IE
var range = document.selection.createRange();
var i = 0;
for (i = textarea.length; i > 0; i--) {
if (range.moveStart('character', 1) == 0)
break;
}
pos = i;
}
if (typeof (textarea.selectionStart) != 'undefined') {
//FireFox
pos = textarea.selectionStart;
}
if (pos == textarea.length)
return 0; //retorna 0 quando não precisa posicionar o elemento
else
return pos; //posição do cursor
}
// move o cursor para a posição pos
function MovimentaCursor(textarea, pos) {
if (pos <= 0)
return; //se a posição for 0 não reposiciona
if (typeof (document.selection) != 'undefined') {
//IE
var oRange = textarea.createTextRange();
var LENGTH = 1;
var STARTINDEX = pos;
oRange.moveStart("character", -textarea.length);
oRange.moveEnd("character", -textarea.length);
oRange.moveStart("character", pos);
//oRange.moveEnd("character", pos);
oRange.select();
textarea.focus();
}
if (typeof (textarea.selectionStart) != 'undefined') {
//FireFox
textarea.selectionStart = pos;
textarea.selectionEnd = pos;
}
}
function filtraCampo(campo) {
var s = "";
var cp = "";
vr = campo;
tam = vr.length;
for (i = 0; i < tam; i++) {
if (vr.substring(i, i + 1) != "/"
&& vr.substring(i, i + 1) != "-"
&& vr.substring(i, i + 1) != "."
&& vr.substring(i, i + 1) != "("
&& vr.substring(i, i + 1) != ")"
&& vr.substring(i, i + 1) != ":"
&& vr.substring(i, i + 1) != ",") {
s = s + vr.substring(i, i + 1);
}
}
return s;
//return campo.replace("/", "").replace("-", "").replace(".", "").replace(",", "")
}
// limpa todos caracteres que não são números
function filtraNumeros(campo) {
var s = "";
var cp = "";
vr = campo;
tam = vr.length;
for (i = 0; i < tam; i++) {
if (vr.substring(i, i + 1) == "0" ||
vr.substring(i, i + 1) == "1" ||
vr.substring(i, i + 1) == "2" ||
vr.substring(i, i + 1) == "3" ||
vr.substring(i, i + 1) == "4" ||
vr.substring(i, i + 1) == "5" ||
vr.substring(i, i + 1) == "6" ||
vr.substring(i, i + 1) == "7" ||
vr.substring(i, i + 1) == "8" ||
vr.substring(i, i + 1) == "9") {
s = s + vr.substring(i, i + 1);
}
}
return s;
//return campo.replace("/", "").replace("-", "").replace(".", "").replace(",", "")
}
// limpa todos caracteres que não são letras
function filtraCaracteres(campo) {
vr = campo;
for (i = 0; i < tam; i++) {
//Caracter
if (vr.charCodeAt(i) != 32 && vr.charCodeAt(i) != 94 && (vr.charCodeAt(i) < 65 ||
(vr.charCodeAt(i) > 90 && vr.charCodeAt(i) < 96) ||
vr.charCodeAt(i) > 122) && vr.charCodeAt(i) < 192) {
vr = vr.replace(vr.substr(i, 1), "");
}
}
return vr;
}
function teclaValida(tecla) {
if (tecla == 8 //backspace
//Esta evitando o post, quando são pressionadas estas teclas.
//Foi comentado pois, se for utilizado o evento texchange, é necessario o post.
|| tecla == 9 //TAB
|| tecla == 27 //ESC
|| tecla == 16 //Shif TAB
|| tecla == 45 //insert
|| tecla == 46 //delete
|| tecla == 35 //home
|| tecla == 36 //end
|| tecla == 37 //esquerda
|| tecla == 38 //cima
|| tecla == 39 //direita
|| tecla == 40)//baixo
return false;
else
return true;
}
// recupera o evento do form
function getEvent(evt) {
if (!evt) evt = window.event; //IE
return evt;
}
//Recupera o código da tecla que foi pressionado
function getKeyCode(evt) {
var code;
if (typeof (evt.keyCode) == 'number')
code = evt.keyCode;
else if (typeof (evt.which) == 'number')
code = evt.which;
else if (typeof (evt.charCode) == 'number')
code = evt.charCode;
else
return 0;
return code;
}
You can use Scriptmanager. Take a look here at how it should be done. http://stackoverflow.com/questions/4994040/scriptmanager-registerstartupscript-code-not-working-why
– Marconi
I thought it was just for Onclick!
– Germano Sampaio
The question helped something?
– Marconi