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[英]Setting the timeout when trying to connect to a remote server using HttpWebRequest?
[英]Timeout error when trying to connect to remote address database
我不断收到超时错误,只有几次我的代码有效。 我在这个论坛上读到我必须在mysql之前使用“ using”。 所以我尝试添加它,但是还是没有运气。 也许我用错了吗? 不用“使用”就离开了我与数据库的最后一个连接,以便你们一开始就能看到它的状态
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using MySql.Data.MySqlClient;
namespace WindowsFormsApplication4
{
public partial class Form3 : Form
{
public Form3()
{
InitializeComponent();
FillCombo();
}
void FillCombo()
{
string dbcon = "SERVER=IP;DATABASE=mudiw_test;UID=mudiw_test;PASSWORD=PASS";
string Query = "select * from mudiw_test.Registration ;";
using (MySqlConnection conDatabase = new MySqlConnection(dbcon))
{
using (MySqlCommand cmDatabase = new MySqlCommand(Query, conDatabase))
{
MySqlDataReader myReader;
try
{
conDatabase.Open();
myReader = cmDatabase.ExecuteReader();
while (myReader.Read())
{
string sName = myReader.GetString("Name");
comboBox1.Items.Add(sName);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
}
}
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
string dbcon = "SERVER=IP;DATABASE=mudiw_test;UID=mudiw_test;PASSWORD=PASS";
string Query = "select * from mudiw_test.Registration where Name='" + comboBox1.Text + "' ;";
using (MySqlConnection conDatabase = new MySqlConnection(dbcon))
{
using (MySqlCommand cmDatabase = new MySqlCommand(Query, conDatabase))
{
MySqlDataReader myReader;
try
{
conDatabase.Open();
myReader = cmDatabase.ExecuteReader();
while (myReader.Read())
{
string sName = myReader.GetString("Name");
string sId = myReader.GetString("ID");
string sEmail = myReader.GetString("Email");
string sAddress = myReader.GetString("Address");
string sPhone = myReader.GetString("Phone");
string sVisits = myReader.GetString("Visits");
name.Text = sName;
id.Text = sId;
email.Text = sEmail;
address.Text = sAddress;
phone.Text = sPhone;
address.Text = sAddress;
visits.Text = sVisits;
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
}
}
private void comboBox2_SelectedIndexChanged(object sender, EventArgs e)
{
if (comboBox2.SelectedItem == "Mantenimiento")
{
int value;
if (Int32.TryParse(visits.Text, out value))
{
if (value < 3)
{
price.Text = "150";
total.Text = "150";
discount.Text = "0%";
}
else if (value >= 3 && value <= 6)
{
price.Text = "150";
total.Text = "127.50";
discount.Text = "15%";
}
else if (value >= 7)
{
price.Text = "150";
total.Text = "112.50";
discount.Text = "25%";
}
}
}
}
private void tabPage1_Click(object sender, EventArgs e)
{
}
private void button1_Click(object sender, EventArgs e)
{
string dbcon = "SERVER=IP;DATABASE=mudiw_test;UID=mudiw_test;PASSWORD=PASS";
string Query = "insert into mudiw_test.Registration (Name,ID,Email,Address,Phone) values('" + this.name.Text + "','" + this.id.Text + "','" + this.email.Text + "','" + this.address.Text + "','" + this.phone.Text + "');";
MySqlConnection conDatabase = new MySqlConnection(dbcon);
MySqlCommand cmDatabase = new MySqlCommand(Query, conDatabase);
MySqlDataReader myReader;
try
{
conDatabase.Open();
myReader = cmDatabase.ExecuteReader();
MessageBox.Show("Saved");
while (myReader.Read())
{
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
}
}
超时与using
语句无关; using
来包装连接,只需确保在完成连接后就将其丢弃。 超时可能意味着您的计算机与数据库之间存在网络连接问题,或者提供了错误的服务器名称。
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