vb.net 实现如下请求，应该怎么写？ POST /RTService/service.asmx HTTP/1.1 Host: 10.168.1.137 Content-Type: text/xml; charset=utf-8 Content-Length: length SOAPAction: "http://tempuri.org/SpcCheck" <?xml version="1.0" encoding="utf-8"?> <soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"> <soap:Body> <SpcCheck xmlns="http://tempuri.org/"> <dcs> <DataCollection> <BatchIDs>string</BatchIDs> <WaferIDs>string</WaferIDs></DataCollection> </dcs> </SpcCheck> </soap:Body> </soap:Envelope>

你可以使用VB.Net中的HttpWebRequest和HttpWebResponse类来实现该请求。具体实现过程如下：

Dim request As HttpWebRequest = CType(WebRequest.Create("http://10.168.1.137/RTService/service.asmx"), HttpWebRequest)
request.Method = "POST"
request.ContentType = "text/xml; charset=utf-8"
request.Headers.Add("SOAPAction", "http://tempuri.org/SpcCheck")

Dim xml As String = "<?xml version=""1.0"" encoding=""utf-8""?>" & _
        "<soap:Envelope xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"" " & _
        "xmlns:xsd=""http://www.w3.org/2001/XMLSchema"" " & _
        "xmlns:soap=""http://schemas.xmlsoap.org/soap/envelope/"">" & _
        "<soap:Body>" & _
        "<SpcCheck xmlns=""http://tempuri.org/"">" & _
        "<dcs>" & _
        "<DataCollection>" & _
        "<BatchIDs>string</BatchIDs>" & _
        "<WaferIDs>string</WaferIDs>" & _
        "</DataCollection>" & _
        "</dcs>" & _
        "</SpcCheck>" & _
        "</soap:Body>" & _
        "</soap:Envelope>"

Dim data As Byte() = Encoding.UTF8.GetBytes(xml)
request.ContentLength = data.Length

Using stream As Stream = request.GetRequestStream()
    stream.Write(data, 0, data.Length)
End Using

Dim response As HttpWebResponse = CType(request.GetResponse(), HttpWebResponse)
Dim reader As StreamReader = New StreamReader(response.GetResponseStream())
Dim result As String = reader.ReadToEnd()

Console.WriteLine(result)

这段代码发送了一个POST请求，将请求体设置为xml变量中的内容，然后从响应流中读取响应并输出。你需要将`10.168.1.137`替换为实际的IP地址，以及将`string`替换为实际的数据。