POST api/Items/UpdateItem

{
  "ItemCode": "sample string 1",
  "ItemName": "sample string 2",
  "TaxCode": "sample string 3",
  "TaxRate": 4.1,
  "Discount": 5.0,
  "DiscountG": 6.0,
  "UnitPrice": 7.0,
  "FirmName": "sample string 8",
  "ForeingName": "sample string 9",
  "OnHand": 10,
  "InvntItem": "sample string 11",
  "Frozen": true,
  "BarCode": "sample string 13",
  "Quantity": 1.1,
  "LastPurchaseDate": "2025-09-29T14:48:54.6910239-06:00",
  "LastPurchasePrice": 1.1,
  "PriceList": [
    {
      "ListNum": 1,
      "ListName": "sample string 2",
      "Price": 3.1,
      "PrimCurr": "sample string 4",
      "AddCurr1": "sample string 5",
      "AddCurr2": "sample string 6"
    },
    {
      "ListNum": 1,
      "ListName": "sample string 2",
      "Price": 3.1,
      "PrimCurr": "sample string 4",
      "AddCurr1": "sample string 5",
      "AddCurr2": "sample string 6"
    }
  ],
  "Barcodes": [
    {
      "BcdEntry": 1,
      "BcdCode": "sample string 2",
      "BcdName": "sample string 3",
      "UomEntry": 4
    },
    {
      "BcdEntry": 1,
      "BcdCode": "sample string 2",
      "BcdName": "sample string 3",
      "UomEntry": 4
    }
  ],
  "UdfTarget": [
    {
      "Name": "sample string 1",
      "FieldType": "sample string 2",
      "Value": "sample string 3"
    },
    {
      "Name": "sample string 1",
      "FieldType": "sample string 2",
      "Value": "sample string 3"
    }
  ],
  "HasInconsistency": true,
  "InconsistencyMessage": "sample string 15",
  "ItemClass": "sample string 16",
  "Speciality": "sample string 17",
  "HasDiscount": true,
  "Supplier": "sample string 19",
  "Requestable": true,
  "ItemGroup": "sample string 21",
  "AuthorizationRequired": true
}

<ItemsModel xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/CLVSPOS.MODELS">
  <AuthorizationRequired>true</AuthorizationRequired>
  <BarCode>sample string 13</BarCode>
  <Barcodes>
    <ItemsBarcodeModel>
      <BcdCode>sample string 2</BcdCode>
      <BcdEntry>1</BcdEntry>
      <BcdName>sample string 3</BcdName>
      <UomEntry>4</UomEntry>
    </ItemsBarcodeModel>
    <ItemsBarcodeModel>
      <BcdCode>sample string 2</BcdCode>
      <BcdEntry>1</BcdEntry>
      <BcdName>sample string 3</BcdName>
      <UomEntry>4</UomEntry>
    </ItemsBarcodeModel>
  </Barcodes>
  <Discount>5</Discount>
  <DiscountG>6</DiscountG>
  <FirmName>sample string 8</FirmName>
  <ForeingName>sample string 9</ForeingName>
  <Frozen>true</Frozen>
  <HasDiscount>true</HasDiscount>
  <HasInconsistency>true</HasInconsistency>
  <InconsistencyMessage>sample string 15</InconsistencyMessage>
  <InvntItem>sample string 11</InvntItem>
  <ItemClass>sample string 16</ItemClass>
  <ItemCode>sample string 1</ItemCode>
  <ItemGroup>sample string 21</ItemGroup>
  <ItemName>sample string 2</ItemName>
  <LastPurchaseDate>2025-09-29T14:48:54.6910239-06:00</LastPurchaseDate>
  <LastPurchasePrice>1.1</LastPurchasePrice>
  <OnHand>10</OnHand>
  <PriceList>
    <PriceListModel>
      <AddCurr1>sample string 5</AddCurr1>
      <AddCurr2>sample string 6</AddCurr2>
      <ListName>sample string 2</ListName>
      <ListNum>1</ListNum>
      <Price>3.1</Price>
      <PrimCurr>sample string 4</PrimCurr>
    </PriceListModel>
    <PriceListModel>
      <AddCurr1>sample string 5</AddCurr1>
      <AddCurr2>sample string 6</AddCurr2>
      <ListName>sample string 2</ListName>
      <ListNum>1</ListNum>
      <Price>3.1</Price>
      <PrimCurr>sample string 4</PrimCurr>
    </PriceListModel>
  </PriceList>
  <Quantity>1.1</Quantity>
  <Requestable>true</Requestable>
  <Speciality>sample string 17</Speciality>
  <Supplier>sample string 19</Supplier>
  <TaxCode>sample string 3</TaxCode>
  <TaxRate>4.1</TaxRate>
  <UdfTarget xmlns:d2p1="http://schemas.datacontract.org/2004/07/CLVSSUPER.MODELS">
    <d2p1:UdfTarget>
      <d2p1:FieldType>sample string 2</d2p1:FieldType>
      <d2p1:Name>sample string 1</d2p1:Name>
      <d2p1:Value>sample string 3</d2p1:Value>
    </d2p1:UdfTarget>
    <d2p1:UdfTarget>
      <d2p1:FieldType>sample string 2</d2p1:FieldType>
      <d2p1:Name>sample string 1</d2p1:Name>
      <d2p1:Value>sample string 3</d2p1:Value>
    </d2p1:UdfTarget>
  </UdfTarget>
  <UnitPrice>7</UnitPrice>
</ItemsModel>

Sample not available.