C#怎么查MYSQL的数据?
MySqlConnection myConnection = new MySqlConnection("server=localhost;user id=root;password=;database=account");
string query = "select * from account where Name = @Name";
MySqlCommand myCommand = new MySqlCommand(query, myConnection);
myCommand.Parameters.Add("@Name",MySqlDbType.VarChar,32);
myCommand.Parameters["@Name"].Value =this.textBox1.Text;
myConnection.Open();
myCommand.ExecuteNonQuery();
MySqlDataReader myDataReader = myCommand.ExecuteReader();
string bookres = "";
while (myDataReader.Read() == true)
{
bookres += myDataReader["id"];
}
this.label1.Text = bookres;
myDataReader.Close();
myConnection.Close();
好象查不出来.`...
------解决方案--------------------使用?号做为参数占位符而不是@:
如:
C# code
MySqlConnection myConnection = new MySqlConnection();
myConnection.ConnectionString = "Persist Security Info=False;database=dbtest;server=localhost;Connect Timeout=30;user id=root; pwd=mysql";
myConnection.Open();
MySqlCommand cmd = new MySqlCommand("select * from table1 where id=?id", myConnection);
cmd.Parameters.Add("?id", MySqlDbType.Int32);
cmd.Parameters[0].Value = 1;
object obj = cmd.ExecuteScalar();