我尝试使用以下方法从表中获取行数:
string commandLine = "SELECT COUNT(*) FROM client";
using (MySqlConnection connect = new MySqlConnection(connectionStringMySql))
using (MySqlCommand cmd = new MySqlCommand(commandLine, connect))
{
connect.Open();
int count = (int)cmd.ExecuteScalar();
return count;
}
我得到了例外:
Specified cast is not valid.
知道我该如何解决吗?