OpenLayers function(mergeNewParams) is overwriting previous function call

Question

I am trying to parse both the values to the corresponding words to fetch data from GeoServer and return me the value, like this:

route.mergeNewParams({viewparams: "'word1:+source;word2:+target"});

But its not working. In fact no values(source and target) are being assigned to the respective words(word1, word2). I have also tried it to do this way:

route.mergeNewParams({viewparams: "word1:"+source});
route.mergeNewParams({viewparams: "word2:"+target});

But in this case last 2nd call of function is overwriting the 1st call.

Answer 1

You need to understrand that the parameters that you pass to the mergeNewParams function, is infact passed to the OGC Service as a HTTP parameter.

SO whatever parameter you pass, should be a valid HTTP parameters.

I'm assuming that source & target are two string variables that you want to pass. In that case, you can do something like this:

var p="word1:"+source+";word2:"+target;
route.mergeNewParams({"viewparams":encodeURI(p)});