小编dev*_*v85的帖子

我在文件的末尾添加了一个新节点,但是我收到了一个写错误:

该文档已有一个'DocumentElement'节点.

我的代码:

XmlDocument doc = new XmlDocument();
doc.Load(directory);
XmlNode refElem = doc.LastChild; // Last node

foreach (MoneyEnter myList in list)
{
    XmlElement entryElement = doc.CreateElement("entry");
    entryElement.SetAttribute("type", myList.TypeAmount);

    XmlElement amountElement = doc.CreateElement("amount");
    amountElement.InnerText = Convert.ToString(myList.Amount);

    XmlElement dateElement = doc.CreateElement("date");
    dateElement.InnerText = Convert.ToString(myList.Date);

    XmlElement descriptionElement = doc.CreateElement("description");
    XmlCDataSection cdataDescription = doc.CreateCDataSection(myList.Description);
    descriptionElement.AppendChild(cdataDescription);

    XmlElement categoryElement = doc.CreateElement("category");
    categoryElement.InnerText = myList.Category;

    entryElement.AppendChild(amountElement);
    entryElement.AppendChild(dateElement);
    entryElement.AppendChild(descriptionElement);
    entryElement.AppendChild(categoryElement);
    doc.InsertAfter(entryElement, refElem); //add new node in end of file
}
doc.Save(directory);

我的XML文件:

<?xml version="1.0" encoding="utf-8" ?>
<entries>
    <entry …

用户必须仅以整数形式输入.如何使用数据注释进行验证？

如何在现有XML文件的末尾添加新节点？

我明白怎么做,但到底怎么样？

例如,我有以下XML文件,需要在文件末尾添加一个新节点"entry":

<?xml version="1.0" encoding="utf-8" ?> 
- <entries>
- <entry type="debit">
<amount>100</amount> 
<date>11.11.2010</date> 
- <description>
- <![CDATA[ ???????? ??????]]> 
</description>
<category>????????</category> 
</entry>
- <entry type="credit">
<amount>50</amount> 
<date>11.11.2010</date> 
- <description>
- <![CDATA[ ???????? ??????]]> 
</description>
<category>????????</category> 
</entry>
- <entry type="debit">
<amount>100</amount> 
<date>11.11.2010</date> 
- <description>
- <![CDATA[ ???????? ??????]]> 
</description>
<category>????????</category> 
</entry>
</entries>