Question

我正在尝试一个按钮，将MySql服务器中的表数据插入文本框。我正在学习一个教程，每个人都有相同的想法，但是在将信息插入文本框时遇到一个问题，我收到错误消息“无法将方法组“读取”转换为非延迟类型“布尔””

我不确定该怎么做。我正在Visual Studio 2019中使用c＃和远程MySql服务器。

  private void Button1_Click(object sender, EventArgs e)
        {
            bool temp = false;
            MySqlConnection con = new MySqlConnection("server=xxx;user id=xxx;password=xxx;database=xxx");
            con.Open();
            MySqlCommand cmd = new MySqlCommand("select * from CadCall where id='" + txtID.Text.Trim() + "'", con);
            MySqlDataReader dr = cmd.ExecuteReader();
            while (dr.Read))
            {
                txtDate.Text = dr.GetString(1);
                txtTime.Text = dr.GetString(2);
                txtCall.Text = dr.GetString(3);
                txtAddress.Text = dr.GetString(4);
                txtApt.Text = dr.GetString(5);
                txtPhone.Text = dr.GetString(6);
                txtInfo.Text = dr.GetString(7);
                txtCaller.Text = dr.GetString(8);
                txtCallerPhone.Text = dr.GetString(9);
                txtNote.Text = dr.GetString(10);
                txtOfficer.Text = dr.GetString(11);
                txtDis.Text = dr.GetString(12);
                txtArr.Text = dr.GetString(13);
                txtFin.Text = dr.GetString(14);
                txtFd.Text = dr.GetString(15);
                txtFl.Text = dr.GetString(16);
                txtDisp.Text = dr.GetString(17);
                txtCase.Text = dr.GetString(18);
                temp = true;
            }
            if (temp == false)
                MessageBox.Show("No Active Call Found");
            con.Close();

因此，最后，当此人按下按钮时，它将在表格中搜索ID（即1），然后用信息填充其余文本框。

感谢进阶！

Answer 1

while (dr.Read()) //it's a method.
{
    txtDate.Text = dr.GetString(1);
    ..
}

请参阅示例- https://dev.mysql.com/doc/dev/connector-net/6.10/html/T_MySql_Data_MySqlClient_MySqlDataReader.htm

Answer 2

您应该写

 while (dr.Read())

装有

while (dr.Read))

将MySql表数据插入文本框

2 个答案: