首先需要安裝MySQL Connector Net 6.8.3

然后在項目中引用MySQL Connector，如下圖所示

C#連接MySQL的操作類代碼如下：public?class?MySQLHelper

{

private?string?db_host?=?"localhost";?//數(shù)據(jù)庫服務(wù)器

private?string?db_port?=?"3306";?//數(shù)據(jù)庫端口號

private?string?db_user?=?"root";?//數(shù)據(jù)庫用戶

private?string?db_pass?=?"123456";?//數(shù)據(jù)庫密碼

private?string?db_name?=?"myblog";?//數(shù)據(jù)庫名

private?MySqlConnection?dbconn;

public?MySQLHelper()

{

//do?nothing

}

~MySQLHelper()

{

this.CloseDBconn();

}

//連接數(shù)據(jù)庫

public?void?OpenDBconn()

{

this.dbconn?=?new?MySqlConnection();

this.dbconn.ConnectionString?=?"server="?+?this.db_host?+?";uid="?+?this.db_user?+?";pwd="?+?this.db_pass?+?";database="?+?this.db_name?+?";";

if?(this.db_port.Length?>?0)

{

this.dbconn.ConnectionString?+=?";port="?+?this.db_port;

}

try

{

this.dbconn.Open();

}

catch?(MySqlException?ex)

{

string?message?=?"無法連接數(shù)據(jù)庫:?"+?ex.Message;

string?caption?=?"系統(tǒng)提示";

MessageBoxButtons?buttons?=?MessageBoxButtons.OK;

DialogResult?result?=?MessageBox.Show(message,?caption,?buttons);

Environment.Exit(0);

}

}

//關(guān)閉數(shù)據(jù)庫

public?void?CloseDBconn()

{

if?(this.dbconn?!=?null)

{

this.dbconn.Close();

}

}

//查詢數(shù)據(jù)

public?MySqlDataReader?query(string?sqltext)

{

MySqlCommand?cmd?=?new?MySqlCommand();

cmd.Connection?=?this.dbconn;

cmd.CommandType?=?CommandType.Text;

cmd.CommandText?=?sqltext;

MySqlDataReader?reader?=?cmd.ExecuteReader();

return?reader;

}

//更新數(shù)據(jù)

public?int?execute(string?sqltext)

{

MySqlCommand?cmd?=?new?MySqlCommand();

cmd.Connection?=?this.dbconn;

cmd.CommandType?=?CommandType.Text;

cmd.CommandText?=?sqltext;

int?result?=?cmd.ExecuteNonQuery();

return?result;

}

}

使用方法(查詢數(shù)據(jù))：this.dbhelper?=?new?MySQLHelper();

this.dbhelper.OpenDBconn();

string?sqltext?=?"s.e.l.e.c.t?*?from?blog?w.h.e.r.e?id=123?order?by?id?asc?limit?0,1";

MySqlDataReader?reader?=?this.dbhelper.query(sqltext);

if?(reader.HasRows?==?false)

{

this.logtext?=?"\r\n"?+?DateTime.Now.ToString()?+?",?內(nèi)容處理完成。";

textBox1.AppendText(this.logtext);

textBox1.ScrollToCaret();

return;

}

else

{

while?(reader.Read()?==?true)

{

this.curr_id?=?Convert.ToInt32(reader["id"]);

this.curr_title?=?reader["title"].ToString();

this.curr_fileext?=?reader["fileext"].ToString();

this.curr_filesize?=?Convert.ToDouble(reader["filesize"])?*?1024;

}

//do?something?more

}

reader.Close();

this.dbhelper.CloseDBconn();

使用方法(更新數(shù)據(jù))：this.dbhelper.OpenDBconn();

string?sqlchan?=?"u.p.d.a.t.e?blog?set?isfixed=1?w.h.e.r.e?id=123";

this.dbhelper.execute(sqlchan);

this.dbhelper.CloseDBconn();

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