c# - Avoiding NullReferenceException in Request.QueryString -


this code throws nullreferenceexception if mode not specified in pages query string:

bool isadvancedmode = request.querystring["mode"].equals("advanced");

this how work around this:

bool isadvancedmode = (request.querystring["mode"] + "").equals("advanced");

is standard practise, or hack?

you can use null-coalescing operator:

bool isadvancedmode = (request.querystring["mode"] ?? string.empty).equals("advanced");

edit: if want re-use logic, try extension method:

public static bool equalifexists(this string source, string comparison) {     return source != null && source.equals(comparison); }  request.querystring["mode"].equalifexists("advanced")

add more overrides match equals signature. i'm not sure if name (i think not).


Comments

Post a Comment

Popular posts from this blog

How to mention the localhost in android -

i trying call localhost in android application. unfortunately not possible used several methods emulator local host http://10.0.2.2/android/dbconnection.php and network ip address http://192.168.1.xx/android/dbconnection.php also http://localhost:8080/android/dbconnection.php but nothing connected localhost. purpose refer stackoverflow answers not working i facing same problem when worked on localhost. referred stackoverflow answer got solution create new emulator works fine in new emulator.
Read more

php - Calling a template part from a post -

i include iframe within post in wordpress. located inside content of post, meaning cannot in post template file, otherwise either before or after. i'd add facebook plugin within posts: <div id="socialwrap"><div class="fb-like" data-href="http://onlinearizonahomes.info" data-send="true" data-width="450" data-show-faces="true" data-font="arial"></div></div> i thinking of calling template part within post <?php get_template_part( 'social' ); ?> cannot use php within post without plugin (i'd avoid using plugin this). an alternative using javascript create html in post, seems unnecessary use of javascript. what best way add html within wordpress post? you can use shortcode. add functions.php function cudjex_fbshare( $atts, $content = null ) { global $post; $link = get_permalink($post->id); return '<div id="socialwrap...
Read more