最近,我开始开发一个在 C# 程序中利用 XML 文档的应用程序。一开始一切都很好,但是当我编辑代码并为程序添加更多功能以防 XML 被删除、损坏等时,程序不想再正常运行了。
提交数据并将其传输到 XML 时使用以下代码:
private void doneCreate_Click(object sender, EventArgs e)
{
//Initialize new XMLDocument class.
XmlDocument XmlDoc = new XmlDocument();
//See if the card data file is there, if not, create it.
if (File.Exists(xmlPath) == false)
{
using (FileStream createFile = File.Create(xmlPath))
{
Byte[] FileData = new UTF8Encoding(true).GetBytes(toBase64("<studycards></studycards>"));
// Add some information to the file.
createFile.Write(FileData, 0, FileData.Length);
createFile.Close();
}
XMLData = "<studycards></studycards>";
}
else
{
XMLData = readXML();
if (XMLData == "")
{
XMLData = "<studycards></studycards>";
}
else
{
XMLData = fromBase64(XMLData);
}
}
XmlDoc.LoadXml(XMLData);
XmlElement Group = XmlDoc.CreateElement("Group", null);
XmlAttribute Group_Attr = XmlDoc.CreateAttribute("Name");
Group_Attr.Value = groupName.Text;
Group.Attributes.Append(Group_Attr);
foreach (string[] Card in CardData)
{
try
{
FrontData = Card[0].ToString();
BackData = Card[1].ToString();
NewCard = XmlDoc.CreateElement("Card");
FrontElement = XmlDoc.CreateElement("Front");
FrontElement.InnerText = FrontData;
BackElement = XmlDoc.CreateElement("Back");
BackElement.InnerText = BackData;
NewCard.AppendChild(FrontElement);
NewCard.AppendChild(BackElement);
Group.AppendChild(NewCard);
}
catch
{
break;
}
}
XmlDoc.DocumentElement.AppendChild(Group);
XmlTextWriter write = new XmlTextWriter(xmlPath, null);
write.Formatting = Formatting.Indented;
XmlDoc.Save(write);
}
尝试在应用程序中单击“完成”时,出现以下异常:
该进程无法访问文件“C:\Users\Toshiba\documents\visual studio 2010\Projects\StudyCards\StudyCards\bin\Debug\Resources\card_data.xml”,因为它正被另一个进程使用。
有什么解决办法吗?