我正在编写一个可以进行反向代理连接的应用程序,但我遇到了问题!
错误在于:new Form1.ProxyConfig()
当我尝试运行它时,我收到一个错误:“ ref或out参数必须是可赋值变量”
private void startToolStripMenuItem_Click(object sender, EventArgs e)
{
if (this.startToolStripMenuItem.Text == "Start")
{
var form2 = new Form2();
if (form2.ShowDialog() != DialogResult.OK)
return;
int num1 = Form1.ProxyListenerStart(ref new Form1.ProxyConfig()
{
pclient_port = form2.ClientPort,
pp_start = form2.LocalStartPort,
pp_end = form2.LocalEndPort
}, ref this._PN);
if (num1 != 0)
int num2 = (int) MessageBox.Show("Error " + num1.ToString());
else startToolStripMenuItem.Text = "Stop";
}
else
{
Form1.ProxyListenerStop();
startToolStripMenuItem.Text = "Start";
listView1.Items.Clear();
toolStripStatusLabel2.Text = "0";
}
}
private struct ProxyConfig
{
public int pclient_port;
public int pp_start;
public int pp_end;
}
答案 0 :(得分:5)
您无法创建变量并将其作为参考传递,就像您在那里一样。试试这个:
var config = new Form1.ProxyConfig()
{
pclient_port = form2.ClientPort,
pp_start = form2.LocalStartPort,
pp_end = form2.LocalEndPort
};
int num1 = Form1.ProxyListenerStart( ref config, ref this._PN );
原因是它确实没有任何意义,请考虑以下情况:
if( int.TryParse( "123", out new int() ) )
{
// there's no way for us to actually use the value TryParse stored
// into the out parameter, since it doesn't have a name
}