$.ajax({
            type: "POST",
            url: "/home/UpFile",  
            data: JSON.stringify(obj),      
            traditional: true,  
            async: false,
            cache: false,  
            context: document.body, 
            dataType: 'json',
            contentType: 'application/x-www-form-urlencoded;charset=UTF-8', 
            contentLength: 2047483647,
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