无法使用 webapi 连接到 mysql 数据库

Question

So I have zyxel server in my home. I made mySQL database using phpmyadmin. And I cannot reach this database using asp.net core webAPI.

I got System.Data.SqlClient.SqlException on my IRepository's method. Of course this is because the method is trying to get database data.

Connection string looks like this:

"ConnectionStrings": {
  "DefaultConnection": "Server=(xxx.xxx.x.xx);Database=sensor;User=temp;Password=pwd;Trusted_Connection=True;MultipleActiveResultSets=true"
}

What am I doing wrong? I also have problems with connecting same db with python.

Answer 1

Issue 1

That connection string appears to be for SQL server. You need a MySql-specific connection string. I've always found ConnectionStrings.com to be helpful in situations like this.

Here's the MySQL template that they provide:

Standard

Server=myServerAddress;Database=myDataBase;Uid=myUsername;Pwd=myPassword;

Specifying TCP port

Server=myServerAddress;Port=1234;Database=myDataBase;Uid=myUsername; Pwd=myPassword;

Multiple servers

Use this to connect to a server in a replicated server configuration without concern on which server to use.

Server=serverAddress1, serverAddress2, serverAddress3;Database=myDataBase; Uid=myUsername;Pwd=myPassword;

See https://www.connectionstrings.com/mysql/ for additional info.

Issue 2

Based on the error message that you provided, you're using a SQL data provider instead of a MySQL connector. Bottom line, you need a MySQL connector. You can download that here .

See this post for additional information: System.Data.SqlClient Namespace for MySQL?

Answer 2

Solved my problem by using Pomelo's library . Docs library didn't seem to work.