> For the complete documentation index, see [llms.txt](https://nviasoft.gitbook.io/nviasoft-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://nviasoft.gitbook.io/nviasoft-docs/api-reference/item-parsing/getsubitemformat.md).

# GetSubItemFormat

### int GetSubItemFormat(int lMsgId)

수신한 SECS 메시지의 현재 위치에 있는 아이템의 \*\*데이터 형식(Format Type)\*\*을 반환합니다.

SECS II 표준에 정의된 포맷 코드 값들을 반환하므로, 이 값을 확인하여 다음에 호출할 데이터 추출 함수(예: GetAsciiItem(), GetU1Item()등)를 결정할 수 있습니다.

Parameters

<table data-header-hidden><thead><tr><th width="224" valign="top"></th><th width="112" valign="top"></th><th valign="top"></th></tr></thead><tbody><tr><td valign="top">Name</td><td valign="top">Type</td><td valign="top">Description</td></tr><tr><td valign="top">lMsgId</td><td valign="top">int</td><td valign="top">수신한 Message의 ID</td></tr></tbody></table>

Return Value

<table data-header-hidden><thead><tr><th width="149" valign="top"></th><th valign="top"></th></tr></thead><tbody><tr><td valign="top">Value</td><td valign="top">Description</td></tr><tr><td valign="top">>=0</td><td valign="top"><p>0 = List</p><p>10 = BINARY,   11 = BOOLEAN,   20 = ASCII,   21 = JIS-8,   30 = INT8,</p><p>31 = INT1,   32 = INT2,   34 = INT4,   40 = FLOAT8,   44 = FLOAT4,</p><p>50 = UINT8,   51 = UINT1,   52 = UINT2,   54 = UINT4</p></td></tr><tr><td valign="top">&#x3C;0</td><td valign="top">더 이상 Next Item이 없음</td></tr></tbody></table>

```csharp
 // 현재 아이템의 포맷 확인
 int format = m_gem.GetSubItemFormat(lMsgId);

 switch (format)
 {
     case 0:  // List
         int count = m_gem.GetSubItemCount(lMsgId);
         Console.WriteLine($"Item is a List with {count} elements.");
         break;

     case 20: // ASCII
         string val = "";
         m_gem.GetAsciiItem(lMsgId, ref val);
         Console.WriteLine($"Item is ASCII: {val}");
         break;

     case 34: // INT4
         int intVal = 0;
         m_gem.GetI4Item(lMsgId, ref intVal);
         Console.WriteLine($"Item is INT4: {intVal}");
         break;

     default:
         if (format < 0)
             Console.WriteLine("No more items or error.");
         break;
 }
```


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