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First, we will have to create a datalist and set the filter using Request Param Hash Variable. In this sample, our request parameter name is "group" and we are using Advanced Form Data Binder to retrieve form data. You are allow to can use other binder binders and write your filter condition using Request using the Request Param Hash Variable.

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By configure configuring this way, the element will retrieve the configured field value and pass it as a url URL request parameters parameter to the datalist when the popup select dialog is open. In this carecase, the value of the "filter" field will pass as the value of the "group" parameter. You can configure a default value if you want to. The default value will be used when the configured field return returns an empty value.

Let us populate some data to our datalist for testing.

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