我有一个列表框,当选择或取消选择某个项目时,我想将更改保存到xml文件中(因此它始终是文件的最新版本,用户不需要“保存”按钮)。
在测试时我偶尔会遇到这个IOException:
该进程无法访问文件“C:\ MyPath \ MyFile.xml”,因为它正由另一个进程使用。
这是我的XML序列化代码:
// Save an object out to the disk
public static void SerializeObject<T>(this T toSerialize, String filename)
{
XmlSerializer xmlSerializer = new XmlSerializer(toSerialize.GetType());
TextWriter textWriter = new StreamWriter(filename);
xmlSerializer.Serialize(textWriter, toSerialize);
}
// Load an object from the disk
private static T DeserialzeObject<T>(String filename) where T : class
{
XmlSerializer xmlSerializer = new XmlSerializer(typeof(T));
try
{
TextReader textReader = new StreamReader(filename);
return (T)xmlSerializer.Deserialize(textReader);
}
catch (FileNotFoundException)
{ }
return null;
}
以下是它的名称:
// Save off the list because the visibility has changed
public void WorkItemColumnTypeOnVisibleChanged(int fieldID, Visibility visibility)
{
ColumnFields.SerializeObject(ColumnFields.GetSerializeFilename());
}
反序列化是给出错误的那个:
WorkItemColumnTypes savedVersion = DeserialzeObject<WorkItemColumnTypes>(result.GetSerializeFilename());
有没有办法优化我与文件的连接,这样我才不会绊倒自己?
答案 0 :(得分:5)
也许您需要在序列化和反序列化方法中的Close
对象上调用TextWriter
?或者使用using
构造强制在块的末尾进行处理。
示例:
// Save an object out to the disk
public static void SerializeObject<T>(this T toSerialize, String filename)
{
XmlSerializer xmlSerializer = new XmlSerializer(toSerialize.GetType());
using(TextWriter textWriter = new StreamWriter(filename))
{
xmlSerializer.Serialize(textWriter, toSerialize);
}
}
// Load an object from the disk
private static T DeserialzeObject<T>(String filename) where T : class
{
XmlSerializer xmlSerializer = new XmlSerializer(typeof(T));
try
{
using(TextReader textReader = new StreamReader(filename))
{
return (T)xmlSerializer.Deserialize(textReader);
}
}
catch (FileNotFoundException)
{ }
return null;
}