type conversion - How to convert string to Boolean in javascript? - Stack Overflow

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I have a public property returned from my code-behind class to aspx page:

window.MyWIndow.IsFull = '<%=this.IsFull%>';

In code-behind it is defined this way:

public bool IsFull
{
    get;
    set;
}

Now, when I use it in my javascript file, I have the following code:

var isShow = myself.IsFull;

This way isShow is either 'True' or 'False'

I need to convert it on the page level, so isShow is boolean instead of string.

So I can write the if else logic

How can I do it?

I have a public property returned from my code-behind class to aspx page:

window.MyWIndow.IsFull = '<%=this.IsFull%>';

In code-behind it is defined this way:

public bool IsFull
{
    get;
    set;
}

Now, when I use it in my javascript file, I have the following code:

var isShow = myself.IsFull;

This way isShow is either 'True' or 'False'

I need to convert it on the page level, so isShow is boolean instead of string.

So I can write the if else logic

How can I do it?

• javascript
• type-conversion
• code-behind

Share Improve this question Follow edited Oct 13, 2017 at 13:30 Suraj Rao 29.6k1111 gold badges9595 silver badges104104 bronze badges asked Jan 18, 2017 at 23:28 genegene 2,10899 gold badges4848 silver badges111111 bronze badges 1

• 2 "tried different things" ... always show what you tried – charlietfl Commented Jan 18, 2017 at 23:35

Add a ment  | 

4 Answers 4

Sorted by: Reset to default 10

You can use JSON.parse('true');

JSON.parse(isShow.toLowerCase());

Try the example below.

var result = ['True', 'False']

var isShow = result[Math.round(Math.random())];

console.log(JSON.parse(isShow.toLowerCase()));

If you know it's always going to return the string True and False, you could just use;

window.MyWindow.IsFull = '<%=this.IsFull%>' === "True";

Alternative method is

window.MyWIndow.IsFull = <%=this.IsFull.ToString().ToLower()%>;

Note, no quotes

wrong answer is wrong...

A couple of options. You can use the built in Boolean object wrapper like this:

var string = myself.IsFull
var isShow = new Boolean(string.toLowercase);

or use the logical NOT operator twice like this:

var string = myself.IsFull
var isShow = !(!string.toLowercase);

edit: but why???? [![enter image description here][1]][1]

[1]: https://i.sstatic/359zg.png

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