关于messagebox的问题
数据库里mBuilldingNo=2所对应的maintainerName有2个，如何让messagebox显示这两个值，现在只能显示一个，不知道为什么（进一步描述：一栋楼 有两个不同的维修人员，如何在确定这个楼号后，在messagebox里显示所有对应的maintainername） 如果在 listbox里显示两个maintainername，可以办到，但是messagebox却只能显示一个
string sql2 = "select * from [maintainer info] where mBuildingNo=2";
  SqlCommand cmd2 = new SqlCommand(sql2, conn2);
  SqlDataReader dr2 = cmd2.ExecuteReader();
  listBox1.Items.Clear();
  while (dr2.Read())
  {
  //if (dr2["mBuildingNo"].ToString() == "2")
  MaintainerName = Convert.ToString(dr2["maintainerName"]);
   
  //listBox1.Items.Add((string)dr2["maintainerName"]);
  //comboBox1.Text = MaintainerName.ToString();
  }
   
  dr2.Close();
  conn2.Close();

  MessageBox.Show("Building No:2\n" + "\nBuilding Time:2009.2.17\n" + "\nRoom Size:100㎡\n" + "\nFloor:15\n" + "\nOwners Amount:" + ownernumber + "\n\nMaintainer Name:" + MaintainerName);

------解决方案--------------------
string sql2 = "select * from [maintainer info] where mBuildingNo=2";
SqlCommand cmd2 = new SqlCommand(sql2, conn2);
SqlDataReader dr2 = cmd2.ExecuteReader();
while (dr2.Read())
{
MaintainerName += Convert.ToString(dr2["maintainerName"]);
}

dr2.Close();
conn2.Close();
MessageBox.Show("Building No:2\n" + "\nBuilding Time:2009.2.17\n" + "\nRoom Size:100㎡\n" + "\nFloor:15\n" + "\nOwners Amount:" + ownernumber + "\n\nMaintainer Name:" + MaintainerName);
------解决方案--------------------

C# code

 while (dr2.Read())
  {
MaintainerName += Convert.ToString(dr2["maintainerName"])+"\n";
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