To get values from multiline text to checkbox

Hello Everyone,

I have an Problem to get the Checkbox value in edit mode to reading value to checkbox I will Explain the scenario. i have created the the web part in that web part we get the checkbox value from different list dynamically when i checked the check box value to added in SharePoint list in multi line of text comma separately added successfully. now, I want to added value of multi line of text value came into the check boxes in checked form but issue i s facing in that to get check box value hoe can i get the multi line of text value in checkbox to get  the value from SharePoint multi line text value  how can i get the value in SharePoint list