How to use the stringedit value in Class??

Hi,

I have a stringedit and a button in my form to filter the records.

In form executequery i can write  like this to get the stringedit value

this.query().dataSourceName('TableName').addRange(fieldNum(TableName,Field)).value(Stringedit.valueStr());

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But ,the filter logic should be in class.

I cannot use the stringedit in my class to get the valuestr.

Instead what i have to write in my class to filter??

Pls Help!