Question

下面给出了XML文件数据我想在c＃中更改Urdu Book的Price节点的值。怎么做!!!

<?xml version="1.0" encoding="utf-8"?>
<Data>
    <Product>
        <Name>English Book</Name>
        <Pieces>10</Pieces>
        <RemainingPieces>5</RemainingPieces>
        <Price>100</Price>
    </Product>
    <Product>
        <Name>Urdu Book</Name>
        <Pieces>20</Pieces>
        <RemainingPieces>10</RemainingPieces>
        <Price>1000</Price>
    </Product>
    <Product>
        <Name>Grammar Book</Name>
        <Pieces>20</Pieces>
        <RemainingPieces>10</RemainingPieces>
        <Price>1000</Price>
    </Product>
</Data>

Answer 1

您可以尝试使用Linq to XML：

var doc = XDocument.Load("book.xml"); 
doc.Element("Data")
    .Element("Product")
    .Element("Price")
    .SetElementValue("value"); 
doc.Save("book_modified.xml");

About Linq to XML

Haven没有尝试编译，但应该足够接近。

Answer 2

如何处理你的xml？

DataSet ds = new DataSet();
byte[] strAsBytes = new System.Text.UTF8Encoding().GetBytes(strYourXml);
System.IO.MemoryStream ms = new System.IO.MemoryStream(strAsBytes);

ds.ReadXml(ms);

string serach_name = "Urdu Book";
string new_value = 42;

if ((ds.Tables("Product") != null)) {

    foreach (DataRow t_row in ds.Tables("Product").Rows) {
        if ((t_row("Name") == serach_name)) {
            t_row("Price") = new_value;
            break; 
        }

    }
}

如何更改节点的值

2 个答案: