Asp.net set conditional from url string

Question

I am new to asp.net and I need a little help.

The problem I need to set the visibility of a button based on whether or not "newflag" appears in the url. For example http://localhost:38805/result.asp?newflag

I have to use asp.net and javascript

Here is my current asp.net and JS code

asp.net

newflag = Request.Form("newflag")

    If newflag = false Then
        newflag = "null"
        Else
        newflag = "true"
        End If

JS

var newflags = '<%= newflag %>';
        console.log(newflags);
        if (newflags === "null" ) {
            document.getElementById('newflag').style.visibility = "hidden";

        }
else if(newflags === "true" ){

    document.getElementById('newflag').style.visibility = "visable";
}

Currently I am getting false from the console even with adding it to the url string.

Does the ASP.NET code need to know if that value exists in the URL parameters? You can check the URL parameters through javascript without ASP.NET code — maccettura, Mar 07 '17 at 16:59
http://stackoverflow.com/questions/901115/how-can-i-get-query-string-values-in-javascript — maccettura, Mar 07 '17 at 17:22
Thanks! that worked! if you post that as an answer I will accept it. — Top-Bot, Mar 07 '17 at 19:23

score 1 · Accepted Answer · edited May 23 '17 at 11:46

1

Instead of leveraging ASP.NET to get the query string parameter and set it to a variable to be later read by Javascript, why not just use Javascript?

See this answer for a detailed list of how to read query string parameters in pure Javascript

edited May 23 '17 at 11:46

Community

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answered Mar 07 '17 at 19:25

maccettura

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Asp.net set conditional from url string

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