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How to set default value of an <index data-role="dropdownlist"/>?

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Sayer
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Sayer asked on 28 Apr 2017, 02:03 PM

I have my html input element designated as a dropdownlist in code below. I have my list of items specified in 'data-source=' where my list of items is an array of string options, which is added to based on what the users picklist values are (dynamically filled picklist). However, I can't seem to get the default value to work. Specifying 'data-option-select' works, and sets the default, however, when I specify that the picklist is required, it doesn't recognize the 'data-option-select' as an actual selection and thinks I still need to select something. If the picklist is not required, it picks up the 'data-option-select' just fine as an option and saves that without me having to go select anything. 

 

How can I specify this dropdownlist as required and set the default value? (I can't really do it in javascript as these picklists are dynamically created. I have no idea how many there are or necessarily what their names will be, so looking for a way to specify selected default in the html markup).

 

Also, I have tried 'data-select' but I get unexpected identifier (the value was a string with multiple words and white spaces). I tried setting data-select to an integer, but that got some 'charAt(0) is not a function' error. I even tried it with setting data-primitive-value="true" but that didn't do anything.

 

'<input id="'+fieldMap[i].fieldName+'Input" data-role="dropdownlist" data-bind="value:'+fieldMap[i].fieldName.toLowerCase()+'" data-option-label="'+fieldMap[i].defaultPicklist+'" data-option-select="'+fieldMap[i].defaultPicklist+'" required data-required-msg="Please Select Valid '+fieldMap[i].fieldLabel+'" data-source="[\'None\'';     

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Joana
Telerik team
answered on 02 May 2017, 11:40 AM

Hello Sayer,

I am not able to fully understand the scenario you have described.  You have bound the value of the , so I think the best approach is to assign a default value to it. Here is a dummy sample: DOJO where I create dynamically 3 dropdowns and then set the corresponding values. Note that in the sample the default values are hard-coded but you should be able to combine fieldMap[i].fieldName and fieldMap[i].defaultPickelist and use it the same way.

I am looking forward to your reply if this did the trick. If not, you could update the dojo sample and send it back to me to review the case.

Regards,
Joana
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Sayer
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answered on 02 May 2017, 02:09 PM

Thank you for the reply. Ultimately, that is what I am trying to do is what you have in your dojo. I have tried:

if(fieldMap[i].fieldType == 'PICKLIST' || fieldMap[i].fieldType == 'TEXTAREA' || fieldMap[i].fieldType == 'STRING' || fieldMap[i].fieldType == 'PHONE'){
    $('#editor_template').append(extraString);
    var fldName = fieldMap[i].fieldName+'Input';
    var dfltPicklist = fieldMap[i].defaultPicklist;
    if(fieldMap[i].fieldTpe == 'PICKLIST'){
        kendo.bind($('#'+fieldMap[i].fieldName+'Container'), {fldName: dfltPicklist});
    }
}

 

which is where I am appending the <input> that is the dropdownlist to the editor template. There is no wrapper really (other than a data-container for each individual component), but they are appended to a template. The above is not working though. I tried doing kendo.bind() on the container and the 'editor_template' without luck. 

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Joana
Telerik team
answered on 04 May 2017, 05:13 AM

Hello Sayer,

The only thing I could suggest at this point is to make sure fieldMap[i].fieldName+'Input' actually mapped to the value.  You could try binding to the document.body. However, I'll need a sample in order to investigate the issue further. You could send it in a separate support thread if you don't like it to be public.

You might find useful these articles:

Regards,
Joana
Telerik by Progress
Try our brand new, jQuery-free Angular 2 components built from ground-up which deliver the business app essential building blocks - a grid component, data visualization (charts) and form elements.
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