how to handle null point exception?

C# Corner

8 Replies

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Praveen Kumar8y ago
Hi Jenith, thanks for the reply, but i am unable to find the filter at the url level
Jenith Thakkar8y ago
Hi You can do it with Ajax
please refer this link for more details
https://stackoverflow.com/questions/43668518/jquery-add-multiple-filter-parameters-to-url
Praveen Kumar8y ago
can you help me with filtering of checkbox values in url

url: _spPageContextInfo.webAbsoluteUrl + "/_api/web/lists/getByTitle('QuickLink')/items?$filter=Category eq '"+ pagename +"'&$orderby=Category_ID asc"& $Is_Visible eq 'Yes',

filter type of check boxes(Yes/No)
Praveen Kumar8y ago
Thank you so much
Jenith Thakkar8y ago
You need to check null,empty and undifined
Like This

if(results1[i].Banner_Image.Url!=undefined&&results1[i].Banner_Image.Url!=null&&typeof results1[i].Banner_Image.Url!=' '){
//your code
}
Arutselvan Muthukannu8y ago
You're missing the undefined handling. Just check like below
if(results1[i].Banner_Image.Url &&results1[i].Banner_Image.Url!=null){
//your code
}
There is another option to do the same. You can check the typeof the variable.
if(typeof results1[i].Banner_Image.Url !=="undefined"&&(results1[i].Banner_Image.Url!=null){
//your code
}
Nanddeep Nachan8y ago
Please try using undefined
if (results1[i].Banner_Image.Url !== undefined)
Muthu Kumar8y ago
Simple way you have to specify when image has been not then show default image.And also you have to check undefined.
var defaultBanner="/path/to/image";
if(results1[i].Banner_Image.Url!=null && results1[i].Banner_Image.Url!=undefined)
{
var banner=results1[i].Banner_Image.Url;
htmlString +='+banner+'" alt="">';
}
else
{
htmlString +='+defaultBanner+'" alt="">';
alert('hello');
}
I hope its solve your problem