[英]Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index
[英]Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index
我使用網絡平台驗證我的用戶允許使用應用程序,但我有一些錯誤請求,如果可能幫助我謝謝你的幫助,我的錯誤是:
2013-07-04 15:06:14 - NPMessage:DEBUG:調度RPCAuthenticateValidateTicketMessage 2013-07-04 15:06:14 - NPMessage:錯誤:System.ArgumentOutOfRangeException:索引超出范圍。 必須是非負數且小於集合的大小。 參數名:startIndex at System.BitConverter.ToUInt64(Byte [] value,Int32 startIndex)at NPx.RPCAuthenticateValidateTicketMessage.ReadTicket(Byte [] bytes)at NPx.RPCAuthenticateValidateTicketMessage.Process(NPHandler client)at NPx.NPMessage.Process()
我的來源是:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading;
using NPx;
namespace NPx
{
public partial class RPCAuthenticateValidateTicketMessage : NPRPCMessage<AuthenticateValidateTicketMessage>
{
public override void Process(NPHandler client)
{
var ipNum = (uint)IPAddress.NetworkToHostOrder(Message.clientIP);
var ip = new IPAddress(BitConverter.GetBytes(ipNum));
var ticket = ReadTicket(Message.ticket);
var npid = Message.npid;
if (npid == 0)
{
npid = ticket.clientID;
}
var valid = false;
var groupID = 0;
if (ticket.version == 1)
{
if (client.NPID == (long)ticket.serverID)
{
if (npid == ticket.clientID)
{
var remoteClient = NPSocket.GetClient((long)ticket.clientID);
remoteClient.CurrentServer = client.NPID;
if (remoteClient != null && !remoteClient.Unclean)
{
Log.Debug("Ticket auth: remote address " + remoteClient.Address.Address.ToString());
Log.Debug("Ticket auth: message address " + ip.ToString());
if (ipNum == 0 || remoteClient.Address.Address.Equals(ip))
{
valid = true;
groupID = remoteClient.GroupID;
Log.Debug("Successfully authenticated a ticket for client " + remoteClient.NPID.ToString("x16"));
}
else
{
Log.Debug("Ticket auth: IP address didn't match.");
}
}
else
{
Log.Debug("Ticket auth: no such client");
}
}
else
{
Log.Debug("Ticket auth: NPID didn't match.");
}
}
else
{
Log.Debug("Ticket auth: server NPID didn't match.");
}
}
else
{
Log.Debug("Ticket auth: version didn't match.");
}
var reply = MakeResponse<AuthenticateValidateTicketResultMessage>(client);
reply.Message.result = (valid) ? 0 : 1;
reply.Message.groupID = groupID;
reply.Message.npid = npid;
reply.Send();
}
private class NPTicket
{
public int version;
public ulong clientID;
public ulong serverID;
public uint time;
}
private NPTicket ReadTicket(byte[] bytes)
{
var ticket = new NPTicket();
ticket.version = BitConverter.ToInt32(bytes, 0);
if (ticket.version == 1)
{
ticket.clientID = BitConverter.ToUInt64(bytes, 4);
ticket.serverID = BitConverter.ToUInt64(bytes, 12);
ticket.time = BitConverter.ToUInt32(bytes, 20);
}
return ticket;
}
}
....
}
在訪問其位置private NPTicket ReadTicket(byte[] bytes)
和20之前,檢查private NPTicket ReadTicket(byte[] bytes)
內的bytes
大小。
byte[] bytes
長度可能小於您期望的索引(0,4,12,20)
例如 :
打電話的時候
BitConverter.ToUInt64(bytes, 12);
此函數從指定的索引(第二個參數)移動數組bytes
,並期望從bytes [12]開始的8個字節,以便將它們轉換為int64。 (ToInt32需要4個字節)
所以你有2個案例:
==>案例1:
bytes
長度可能<13,這意味着字節[12]無效,因此它將拋出異常: 索引超出范圍
在調用索引之前,請嘗試檢查byte []的長度
==>案例2:
從指定的索引開始,數組中沒有足夠的字節。 示例:如果您的數組bytes
長度為15 ..當調用BitConverter.ToUInt64(bytes, 12);
將拋出異常,因為該函數將占用字節[12],字節[13],字節[14], 字節[15] (哎呀有你的問題)..直到字節[19]。
為了進一步說明Siraj的觀點,你可以在try ... catch中包裝BitConverter
int machineUint = 0;
try
{
machineUint = BitConverter.ToUInt16(bytes, 12);
}
catch (IndexOutOfRangeException indexer)
{
machineUint = 0;
}
catch (Exception ex)
{
machineUint = 0;
}
並且在出錯時將產生0作為索引的輸出超出范圍異常和一般異常情況。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.