public List<sys_DocType> Query(string content)
        {
            var q = _Database.GetQueryable<sys_DocType>();
            if (!String.IsNullOrEmpty(content))
            {
                q = q.Where(w => false
                    || Microsoft.EntityFrameworkCore.EF.Functions.Like(w.DocCode, $"%{content}%")
                    || Microsoft.EntityFrameworkCore.EF.Functions.Like(w.FormName, $"%{content}%")
                    || Microsoft.EntityFrameworkCore.EF.Functions.Like(w.FormNameSpace, $"%{content}%")
                    || Microsoft.EntityFrameworkCore.EF.Functions.Like(w.FormCaption, $"%{content}%")
                    || Microsoft.EntityFrameworkCore.EF.Functions.Like(w.KeyFieldName, $"%{content}%")
                    || Microsoft.EntityFrameworkCore.EF.Functions.Like(w.TableName, $"%{content}%")
                    || Microsoft.EntityFrameworkCore.EF.Functions.Like(w.TableDescription, $"%{content}%")
                    || Microsoft.EntityFrameworkCore.EF.Functions.Like(w.Remark, $"%{content}%")
                );
            }
            return q.ToList();
        }