c# - 将 2 个查询的结果合并为 1 个结果，然后传递给 DGV

Question

我需要将下面的前后组合成一个结果，然后将其传递给数据 GridView 。我使用 before + after 因为我不知道如何组合结果。

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

        int 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.ID).SingleOrDefault();

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

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

        var endResult = before + after;

        dgvBRT.DataSource = endResult;
        dgvBRT.Databind();

Answer 1

你想要的 + 要么是 before.Concat(after) 要么是 before.Union(after)，这取决于你想要的方式要处理的重复项(union 删除重复项；concatenation 不删除；例如 {1,2,2,3} concat {3,4} is {1 ,2,2,3,3,4}，其中 {1,2,2,3} union {3,4} 是 {1,2,3,4}(虽然顺序是否定义在union case中值得怀疑)