Question

我正在尝试从数据库中检索记录并将它们分配给comboBox。我只是这样做但是当我尝试从comboBox中选择任何人时，我总是得到comboBox中最后一条记录的值。请帮我。这是我的代码。

        command = new SqlCommand("Select supplier_id, supplier_name from tbl_supplier", MySqlConnection);
        m_dr = command.ExecuteReader();

        while (m_dr.Read())
        {
            comboBoxSupplier.Items.Add(m_dr["supplier_name"].ToString());

            comboBoxSupplier.ValueMember = (m_dr["supplier_id"].ToString());

            comboBoxSupplier.DisplayMember = (m_dr["supplier_name"].ToString());
        }
        m_dr.Close();

Answer 1

相关问题的答案：Fill Combobox from database

cmbTripName.ValueMember =“supplier_id”; cmbTripName.DisplayMember =“supplier_name”;

指向循环外的列。（我试过这个，它对我有用）

Answer 2

DataTable dt = new DataTable();
dt.Load(cmd.ExecuteReader());

int count = 0;
foreach (datarow row in dt)
{
    count += 1;
    comboBoxSupplier.Items.Add(dt[count]["supplier_name"].ToString());   
}

填充项目并从C＃中的数据库为comboBox赋值

2 个答案: