查詢記錄+前後6行？

Question

我希望能夠查詢包含正確記錄的子集，然後是總共13行的前後6個子集，並將它們顯示在DGV中。查詢拉出正確的行如下：

private void textBox6_Leave(object sender, EventArgs e) 
    { 
     DataClasses3DataContext db = new DataClasses3DataContext(); 

     var matchedAdd = (from c in db.GetTable<prop>() 
          where c.HOUSE_NO.Contains(textBox1.Text) && c.Direction.Contains(textBox2.Text) && c.street.Contains(textBox3.Text) && c.SUFF.Contains(textBox4.Text) 
          select c).SingleOrDefault(); 
    } 

Answer 1

如果PARCEL號碼增加，然後使用您的查詢來檢索地塊號碼。

然後：

var before = (from c in db.GetTable<prop>() 
         where c.PARCEL < retrievedParcelNumber orderby c.PARCEL descending 
         select c).Take(6); 

var after = (from c in db.GetTable<prop>() 
         where c.PARCEL > retrievedParcelNumber orderby c.PARCEL 
         select c).Take(6);