[英]C# read xml datatable in datatable
我需要在xml文件的datatabele中读取datatable。 例如,我有以下xml设置:
<Devs>
<Dev_1>
<port>COM7</port>
<addrs>1, 2</addrs>
<SupplyVoltageMeasurement>
<addr>2</addr>
<channel>3</channel>
</SupplyVoltageMeasurement>
</Dev_1>
<Dev_2>
<port>COM6</port>
<addrs>3, 4</addrs>
<SupplyVoltageMeasurement>
<addr>4</addr>
<channel>3</channel>
</SupplyVoltageMeasurement>
</Dev_2>
<Common>
<BaudRate>38400</BaudRate>
<BufferSize>30</BufferSize>
<UpdatePeriod>50</UpdatePeriod>
<SupplyVoltageChannel>3</SupplyVoltageChannel>
</Common>
</Devs>
因此,我可以将Dev_1读取为表格,但不能将SupplyVoltageMeasurement
读取为表格。 那么,如何在数据表Dev_1
读取数据表SupplyVoltageMeasurement
?
使用XElement
类初始化xml。 之后,它真的很容易使用。
var xml = new XElement("xmlSTringAbove");
foreach ( var dev in xml.Elements().Where(e=>e.Name.StartsWith("Dev")) )
{
/// this line gives Dev_1, Dev_2 ...
var devName = dev.Name;
var addr = dev.Element("SupplyVoltageChannel").Element("addr").Value;
var channel = dev.Element("SupplyVoltageChannel").Element("channel").Value;
/// use addr, channel and devName as you like
}
XElement xmlDoc = XElement.Load("SO-Question.xml"); // initialize your .xml document to read from
foreach (var handle in xmlDoc.Elements().Where(e => e.Name.ToString().StartsWith("Dev"))) // traverse each node of the .xml doc, based on a match condition, here : every node that starts with "Dev"
{
// retrieve the value of every Element in the Node (mark the nestings)
var devName = handle.Name;
var port = handle.Element("port").Value;
var addrs = handle.Element("addrs").Value;
var addr = handle.Element("SupplyVoltageMeasurement").Element("addr").Value;
var channel = handle.Element("SupplyVoltageMeasurement").Element("channel").Value;
}
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