[英]C# connection with MySQL Database
再一次,我只是使用谷歌并通过论坛搜索并没有真正得到任何进一步,所以我们在这里 go:
我正在尝试与 C# 和 MySQL 数据库(在 phpmyadmin 上运行)建立连接。
这是我到目前为止得到的代码:
using System;
using System.Data;
using MySql.Data.MySqlClient;
using MySql.Data;
namespace csharpdatabasefinal
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("C#: Connect to MySQL Database using localhost." + Environment.NewLine);
string connectionString = "server=localhost;user=csharptest;database=csharptest;port=3306;password=123";
MySqlConnection conn = new MySqlConnection(connectionString);
try
{
conn.Open();
Console.WriteLine("Connection is " + conn.State.ToString() + Environment.NewLine);
conn.Close();
Console.WriteLine("Connection is " + conn.State.ToString() + Environment.NewLine);
}catch(MySql.Data.MySqlClient.MySqlException ex)
{
Console.WriteLine("Error: " + ex.Message.ToString());
}
Console.WriteLine("Press any key to exit..");
Console.Read();
}
}
}
这是我得到的错误,我想它与参考有关,但我不太确定..我添加为参考“MySql.Data.dll”和“System.Security.Permissions.dll”。 我添加了 Systen.Security.Permission.dll 因为在之前的错误中他要求它。
这是我得到的错误:
这里是完整的错误代码:
System.TypeInitializationException
HResult=0x80131534
Message=The type initializer for 'MySql.Data.MySqlClient.Replication.ReplicationManager' threw an exception.
Source=MySql.Data
StackTrace:
at MySql.Data.MySqlClient.Replication.ReplicationManager.IsReplicationGroup(String groupName)
at MySql.Data.MySqlClient.MySqlConnection.Open()
at csharpdatabasefinal.Program.Main(String[] args) in C:\Users\anonym\source\repos\csharpdatabasefinal\csharpdatabasefinal\Program.cs:line 19
Inner Exception 1:
FileNotFoundException: Could not load file or assembly 'System.Configuration.ConfigurationManager, Version=4.0.3.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'. The system cannot find the file specified.
在 Project -> Properties -> Debug 中启用“本机代码调试”
如果这不起作用,请尝试通过 nuget 添加 MySQL dll:
Install-Package MySql.Data -Version 8.0.20
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