使用 TwinCAT 3 ADS.Net 從 PLC 讀取數(shù)據(jù)，我嘗試讀取包含結(jié)構(gòu)數(shù)組的結(jié)構(gòu)，但 ReadAny 命令因“無(wú)法編組類(lèi)型”異常而崩潰。不過(guò)，直接讀取結(jié)構(gòu)數(shù)組效果很好。public object ReadAny(long indexGroup, long indexOffset, Type type, int[] args);ReadAny方法的頭部注釋中寫(xiě)道：“如果要讀取的對(duì)象類(lèi)型是數(shù)組類(lèi)型，則必須在參數(shù)args中指定每個(gè)維度的元素?cái)?shù)量?！钡菍?duì)于包含結(jié)構(gòu)數(shù)組的結(jié)構(gòu)，args 應(yīng)該是什么？（如果沒(méi)有“args”，它也會(huì)失敗。）我目前使用 .NET 4.7、VS 2013。有選擇嗎？[StructLayout(LayoutKind.Sequential, Pack = 0)]public class WholeData{ [MarshalAs(UnmanagedType.ByValArray, SizeConst = 5)] public Station[] StationArray; // Potentially more fields...[StructLayout(LayoutKind.Sequential, Pack = 0)]public class Station{ [MarshalAs(UnmanagedType.I1)] public bool isPass; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 81)] public string name; // More fields...}// -- Main --int[] args = { 5 };// Works fine:Station[] stationArray = (Station[])m_AdsClient.ReadAny(indexGroup, indexOffset, typeof(Station[]), args);// Fail:WholeData wholeData = (WholeData)m_AdsClient.ReadAny(indexGroup, indexOffset, typeof(WholeData), args);// - OR -WholeData wholeData = (WholeData)m_AdsClient.ReadAny(m_VarHandle, typeof(WholeData), args);
1 回答
慕森卡
TA貢獻(xiàn)1806條經(jīng)驗(yàn) 獲得超8個(gè)贊
我測(cè)試成功以下代碼：
代碼：
class Program
{
public static TcAdsClient client;
static void Main(string[] args)
{
// Create the ADS Client
using (client = new TcAdsClient())
{
// Establish Connection
client.Connect(new AmsAddress("10.1.2.95.1.1", 851));
int handle = client.CreateVariableHandle("PRG_AIS.stAds");
AdsClass ads = (AdsClass)client.ReadAny(handle, typeof(AdsClass));
ads.boolArr[0] = 1;
client.WriteAny(handle, ads);
Console.ReadLine();
}
}
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
class AdsClass
{
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 10)]
public byte[] boolArr = new byte[10];
}
ST代碼：
TYPE AdsStruct :
STRUCT
bTestArray : ARRAY[0..9] OF BOOL;
END_STRUCT
END_TYPE
AdsStruct 在 PRG_AIS 中定義為 stAds。
或者，如果您有一個(gè)結(jié)構(gòu)數(shù)組，請(qǐng)按以下方式修改代碼：
代碼：
[StructLayout(LayoutKind.Sequential, Pack = 1)]
class AdsClass
{
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 10)]
public InnerStruct[] strArr = new InnerStruct[10];
}
struct InnerStruct
{
public byte bBoolTest;
public int nIntTest;
}
ST代碼：
TYPE AdsStruct :
STRUCT
stTestArray : ARRAY[0..9] OF InnerStruct;
END_STRUCT
END_TYPE
TYPE InnerStruct :
STRUCT
bBoolTest : BOOL;
nIntTest : DINT;
END_STRUCT
END_TYPE
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