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Dynamics 365 Community / Forums / Microsoft Dynamics CRM (Archived) / Unable to clear lookup...
Microsoft Dynamics CRM (Archived)

Unable to clear lookup on Change with Javascript

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Posted on by Community Member Microsoft Employee

Hi all,

I have a lookup field which is filtered by an optionset using this function :

function preFilterLookup() {
    Xrm.Page.getControl("lookupAttribute").addPreSearch(function () {
        addLookupFilter();
    });
}

function addLookupFilter() {

    var optionSet= Xrm.Page.getAttribute("optionSetAttribute").getValue();

    if (optionSet!= null) {

        fetchXml = "<filter type='and'><condition attribute='optionSetAttribute' operator='eq' value='" + optionSet+ "' /></filter>";
        Xrm.Page.getControl("lookupAttribute").addCustomFilter(fetchXml);

I wanted to have it so that if we change the option Set then the look up is emptied so that the user can choose from a new set of values. I did it with :

function optionSet_onChange() {
    var lookUp= Xrm.Page.getAttribute("lookupAttribute");
    if (lookUp!= null) {
        lookUp.setValue(null);
    }

However the field is never reset to null. The weirdest part is that it did work a few times at first but since then nothing.

Do any of you have any idea how that could of happened ?

Cheers

Simon

*This post is locked for comments

  • Community Member Profile Picture
    Community Member Microsoft Employee on at
    RE: Unable to clear lookup on Change with Javascript

    Thanks !

    That was the problem.

    Once I definied the parameter in the CRM and not in the on_change function, it worked

    Thanks again !

  • Verified answer
    Community Member Profile Picture
    Community Member Microsoft Employee on at
    RE: Unable to clear lookup on Change with Javascript

    pls find the link pass parameter to clear lookup

    crmdm.blogspot.in/.../as-you-all-know-one-of-best-features-of.html

  • Suggested answer
    Community Member Profile Picture
    Community Member Microsoft Employee on at
    RE: Unable to clear lookup on Change with Javascript

    try to debug the code and find were exactly you get error, sent the screen shot of error

    function preFilterLookup()

    {

       Xrm.Page.getControl("lookupAttribute").addPreSearch(function () {

           addLookupFilter();

       });

    }

    function addLookupFilter() {

       var optionSet= Xrm.Page.getAttribute("optionSetAttribute").getValue();

       if (optionSet!= null) {

           fetchXml = "<filter type='and'><condition attribute='optionSetAttribute' operator='eq' value='" + optionSet+ "' /></filter>";

           Xrm.Page.getControl("lookupAttribute").addCustomFilter(fetchXml);

    }

    }

    //I wanted to have it so that if we change the option Set then the look up is emptied so that the user can choose from a new set of values. I did it with :

    function optionSet_onChange()

    {

       var lookUp= Xrm.Page.getAttribute("lookupAttribute");

       if (lookUp!= null) {

           Xrm.Page.getAttribute("lookupAttribute").setValue(null);

       }

    }

  • Community Member Profile Picture
    Community Member Microsoft Employee on at
    RE: Unable to clear lookup on Change with Javascript

    Hi,

    Thanks for your answer.

    I tried what you said but same result : nothing happened.

    I also tried putting alert() at different places but nothing showed...

    I'm new to dynamics so I'm not sure if the alert() function doesn't show in CRM or if my code is just not even being executed

  • Suggested answer
    Community Member Profile Picture
    Community Member Microsoft Employee on at
    RE: Unable to clear lookup on Change with Javascript

    try to set null value to lookup in alternate method

    function SetLookupNull(lookupAttribute)

    {var lookupObject = Xrm.Page.getAttribute(lookupAttribute);

    if (lookupObject != null)

    {

    Xrm.Page.getAttribute(lookupAttribute).setValue(

    null);

    }

    }

    regards,

    Nithin

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