Question

我是C＃和Linq的新手，想要从MS Access中使用Linq填充ComboBox。但是，如果我调试代码，ComboBox为空。

我读过一些较旧的帖子，但他们没有帮助。失败在哪里？

private void Form1_Load(object sender, EventArgs e)
{
    try
    {
        connection.Open();
        label1.Text = "OK";

        PoolDataSet pool = new PoolDataSet();

        comboBoxPool.DisplayMember = "Pool-Name";
        comboBoxPool.ValueMember = "ID";

        comboBoxPool.DataSource = (from x in pool.Pools
                                      select x._Pool_Name).ToList();

        connection.Close();
    }
    catch (Exception ex)
    {
        MessageBox.Show("Error" + ex);
    }
 }

Answer 1

谢谢，填充我的池 - 对象是问题所在。我通过添加.Fill（）：

得到它

connection.Open();
connectionLabel.Text = "Connection successful!";

PoolsDataSet pool = new PoolsDataSet();
(new PoolsDataSetTableAdapters.PoolsTableAdapter()).Fill(pool.Pools);
comboBoxPool.DataSource = (from x in pool.Pools
                           select x.ID).ToList();

comboBoxPool.DisplayMember = "ID";

connection.Close();

正在运行;）

从MS Access中使用Linq填充ComboBox

1 个答案: