如何保存和检索只读类型的文本框的值？ [英] How to save and retrieve values of text box of type read only?
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问题描述
我想计算学生的费用总额，我得到费用的价值，当我给予折扣，特许给在数据库中重视商店的学生。
当我我保存已禁用文本框的值，它没有保存在数据库中。
解决方案
不确定您的业务规则是什么，但禁用输入框没有值类型文本。如果你在下面运行我的例子，你会看到提交lname值没有通过，即使我已经设置了它。
<！DOCTYPE html>
< html>
< body>
< form action =demo_form.asp >
名字：< input type =textname =fname>< br>
姓氏：< input type =text value =fdsaname =lname已停用>< br>
< input type =submitvalue =提交>
< / form>
< / body>
< / html>
我的解决方案是将文本框设置为只读。这将不允许用户更改值。
如果您在JavaScript中将文本框设置为禁用，则设置后续解决方案禁用文本框到隐藏值，以便您可以访问该值，即使文本框已禁用且无价值。
<！DOCTYPE html>
< html>
< body>
< form action =demo_form.asp>
名字：< input type =textname =fname>< br>
姓氏：< input type =textname =lname已禁用>< br>
< input type =hiddenname =lnameIfDisabledvalue =Pizza>
< input type =submitvalue =Submit>
< / form>
< / body>
< / html>
如果这样可以解决您的问题，请将问题标记为已回答。感谢。
I want to calculate fee total of student,I getting values of fee and when i give discount,concession to student that values store in database.
when i am saving values of disabled text box,It was not saving in database.
解决方案
Not sure what your business rules are, but there is no value for a disabled input box of type text. If you run my example below, you'll see on submit the lname value is not passed, even though I've set it.
<!DOCTYPE html>
<html>
<body>
<form action="demo_form.asp">
First name: <input type="text" name="fname"><br>
Last name: <input type="text" value="fdsa" name="lname" disabled><br>
<input type="submit" value="Submit">
</form>
</body>
</html>
My solution would be to set the textbox to readonly. This will not allow the user to change the value.
A subsequent solution if you are setting the textbox to disabled in JavaScript, then set the value of the soon to be disabled textbox to a hidden value so you can access the value, even though the textbox is disabled and valueless.
<!DOCTYPE html>
<html>
<body>
<form action="demo_form.asp">
First name: <input type="text" name="fname"><br>
Last name: <input type="text" name="lname" disabled><br>
<input type="hidden" name="lnameIfDisabled" value="Pizza">
<input type="submit" value="Submit">
</form>
</body>
</html>
Please mark the question as answered if this solves your problem. Thanks.
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