我也有同样的问题。这段代码解决了我的问题。这个解决方案正是你想要的。它不仅可以格式化你的十进制数,还可以消除空格。试试这个。在我的情况下,我允许用户输入“+”或“-”,所以我也检查了这个验证。
<script type="text/javascript">
function checkforvalidation() {
var txtvalue = document.getElementById('<%=txtspherical.ClientID %>').value;
var leftstr = "";
var rightstr = "";
var tempstr = "";
var operator = "";
txtvalue = txtvalue.replace(/\s/g, '');
document.getElementById('<%=txtspherical.ClientID %>').value = txtvalue;
if (txtvalue.indexOf(".") != -1) {
leftstr = txtvalue.split(".")[0];
rightstr = txtvalue.split(".")[1];
if (leftstr.indexOf("-") == 0 || leftstr.indexOf("+") == 0) {
operator = leftstr.substr(0, 1);
tempstr = leftstr.substr(1, leftstr.length - 1);
leftstr = ltrim(tempstr, '0');
if (leftstr.length == 0) {
leftstr = '0';
}
if (rightstr.indexOf("-") == -1 || rightstr.indexOf("+") == -1) {
rightstr = ltrim(rightstr, '0');
rightstr = chkdecimalpoints(rightstr);
if (operator != null || operator != "") {
txtvalue = operator + leftstr + "." + rightstr;
}
else {
txtvalue = leftstr + "." + rightstr;
}
document.getElementById('<%=txtspherical.ClientID %>').value = txtvalue;
}
else {
document.getElementById('<%=txtspherical.ClientID %>').value = "";
}
}
else {
tempstr = leftstr.substr(0, leftstr.length);
leftstr = ltrim(tempstr, '0');
if (leftstr.length == 0) {
leftstr = '0';
}
if (rightstr.indexOf("-") == -1 || rightstr.indexOf("+") == -1) {
rightstr = rtrim(rightstr, '0');
rightstr = chkdecimalpoints(rightstr);
txtvalue = leftstr + "." + rightstr;
document.getElementById('<%=txtspherical.ClientID %>').value = txtvalue;
}
}
}
else if (txtvalue.indexOf("-") == -1 || txtvalue.indexOf("+") == -1) {
txtvalue = ltrim(txtvalue, '0');
if (txtvalue.length == 0) {
txtvalue = '0';
}
if (operator != null || operator != "") {
txtvalue = operator + txtvalue + ".00";
}
// txtvalue = leftstr + "." + rightstr;
document.getElementById('<%=txtspherical.ClientID %>').value = txtvalue;
}
else if (txtvalue.indexOf("-") == 0 || txtvalue.indexOf("+") == 0) {
operator = txtvalue.substr(0, 1);
tempstr = txtvalue.substr(1, leftstr.length - 1);
txtvalue = alltrim(tempstr, '0');
if (operator != null || operator != "") {
txtvalue = operator + txtvalue + ".00";
document.getElementById('<%=txtspherical.ClientID %>').value = txtvalue;
}
}
}
function chkdecimalpoints(rightstr) {
if (rightstr.length == 0) {
rightstr = '00';
return rightstr;
}
else if (rightstr.length == 1) {
rightstr = rightstr + '0';
return rightstr;
}
else if (rightstr.length > 2) {
var tempvar = rightstr.substr(2, 1);
if (tempvar >= 5) {
tempvar = parseInt(rightstr.substr(1, 1)) + 1;
tempvar = rightstr.substr(0, 1) + tempvar.toString();
if (tempvar.length > 2) {
tempvar = tempvar.substr(0, 2);
}
return tempvar;
}
else {
tempvar = rightstr.substr(0, 2);
return tempvar;
}
}
else {
return rightstr;
}
}
function ltrim(str, chars) {
chars = chars || "\\s";
return str.replace(new RegExp("^[" + chars + "]+", "g"), "");
}
function rtrim(str, chars) {
chars = chars || "\\s";
return str.replace(new RegExp("[" + chars + "]+$", "g"), "");
}
function alltrim(str, chars) {
chars = chars || "\\s";
return str.replace(new RegExp("^[" + chars + "]+$", "g"), "");
}
</script>
HTML 源代码:
<asp:TextBox ID="txtspherical" runat="server" OnBlur="javascript:checkforvalidation();">
</asp:TextBox>