My pagination doesn't work correctly

I figured out that get_next_posts_link () is always NULL. But why?

Hi

Thanks for this. I tried to build it like that but it won’t work for me somehow.

Here is my full code, maybe you see what’s wrong.

function usePermalinks($weiter, $zurueck) {
	global $paged;
	$number_posts = get_option('posts_per_page');
	$paged = get_query_var('paged');
	$category = "showposts=".$posts;
	query_posts($category."&paged=$paged&showposts=$number_posts");
	$paged = get_query_var('paged') ? get_query_var('paged') : 1;

	if ($paged > 0) {
	echo var_dump(next_posts_link()) ;
		if (get_next_posts_link()) {
			echo '<br /><div class="pagination">' . next_posts_link($weiter) . '</div>';
		}

		if (get_previous_posts_link()) {
			echo '<br /><div class="pagination">' . previous_posts_link($zurueck) . '</div>';
		}
	}
	else  {
		echo '<br /><a class="blog_link" href="#" onclick="history.go(-1);return false;";>Back to the list</a>';
	}
}

function showAllNews() {
	$paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
	$args = array(
			'posts_per_page' => 6,
			'post_type' => 'news',
			'orderby' => 'date',
			'order' => 'DESC',
			'paged' => $paged
	);
	$loop = new WP_Query( $args );
	while ( $loop->have_posts() ) : $loop->the_post();
	?>
	<div class="span3 news-container left-align">
		<h3><?php the_title(); ?></h3>
		<p>
			<?php echo substr(get_the_content(), 0, 180); ?>
			<?php if (strlen(get_the_content()) > 180) { echo " ..."; } ?>
		</p>
		<a class="news-button" href="<?php the_permalink(); ?>">Weiterlesen</a>
	</div>

	<?php
	endwhile;
	usePermalinks("Vor", "Zurück"); // This won't work

	next_posts_link('Older Entries'); // This won't work
    previous_posts_link('Newer Entries'); // This won't work

	wp_query_reset();
}
add_shortcode('showAllNews', 'showAllNews');

The shortcode I use on a page of my Custom Post Type.

I have also tried this code:

function showAllNews() {
/**
 * Displays the Pagination in Custom loop
 *
 */

get_header();
$temp = $wp_query; //save old query
$wp_query= null; //clear $wp_query

//The query
$wp_query = new WP_Query();
$wp_query->query( array( 'post_type' =>'news', 'posts_per_page'=>3, 'paged' => $paged ) );
//The loop
while ($wp_query->have_posts()): $wp_query->the_post(); 

     the_title();

endwhile;

//Pagination part
if(function_exists('wp_pagenavi') ) {
     wp_pagenavi(); //function call for plugin pagination( wp pagenavi plugin)
}else{ ?>
     <ul class="pagination">
          <li class="previous"><?php next_posts_link('Previous'); ?></li>
	  <li class="next"><?php previous_posts_link('Next'); ?></li>
     </ul>
<?php
}//endif
wp_reset_postdata();
$wp_query = null; //Reset the normal query
$wp_query = $temp;//Restore the query

get_footer();
}

I get the title of my custom pages but here it won’t show me the pagination as well.

This code I just copy/pasted from http://devotepress.com/coding/wordpress-custom-loop-pagination/

I didn’t change much and I don’t really see why it won’t work. I think I visited all google sites to find a solution for this!

That’s perfect, I’ll see what I can find out. Thank you!!