Saving my list to Isolated Storage - list

Question

I'm having an issue while saving my list items to isolated storage.(Windows Phone 7)
Here is how I defined my list class; I'm using data binding
public class CTransaction
{
public String Date1 { get; set; }
public String Amount1 { get; set; }
public String Type1 { get; set; }
public String Time1 { get; set; }
public String Dis1 { get; set; }
public String Def1 { get; set; }
public CTransaction(String date1, String amount1, String type1, String time1, String dis1, String def1)
{
this.Date1 = date1;
this.Amount1 = amount1;
this.Time1 = time1;
this.Dis1 = dis1;
this.Def1 = def1;
switch (type1)
{
case "FR":
this.Type1 = "Images/a.png";
break;
case "TA":
this.Type1 = "Images/b.png";
break;
case "DA":
this.Type1 = "Images/c.png";
break;
case "CC":
this.Type1 = "Images/mount.png";
break;
}
}
}
Here is how I insert the items to my list; I'm assigning something to the fields and then I'm inserting this into my list like;
List<CTransaction> ctransactionList = new List<CTransaction>();
//some list item filling operations here***
ctransactionList.Insert(0, new CTransaction(DefaultDate, DefaultAmount, RandomType, Times, Dist, Defin));//This one inserts at the top of my list
CTransactionList.ItemsSource = null;
CTransactionList.ItemsSource = ctransactionList; //These two operations refreshes my list
!!Yes, you see how I insert and create my list. Everything is OK. now I want to save ctransactionList
Here is How I save it;(by clicking a button)
var store = IsolatedStorageFile.GetUserStoreForApplication();
if (store.FileExists("saver"))
{
store.DeleteFile("saver");
}
using (var stream = new IsolatedStorageFileStream("saver", FileMode.OpenOrCreate, FileAccess.Write, store))
{
var serializer = new XmlSerializer(typeof(List<CTransaction>));
serializer.Serialize(stream, ctransactionList);
}
Here is How I load it (By clicking another button)
var store = IsolatedStorageFile.GetUserStoreForApplication();
if (store.FileExists("saver"))
{
using (var stream = new IsolatedStorageFileStream("saver", FileMode.OpenOrCreate, FileAccess.Read, store))
{
var reader = new StreamReader(stream);
if (!reader.EndOfStream)
{
var serializer = new XmlSerializer(typeof(List<CTransaction>));
ctransactionList = (List<CTransaction>)serializer.Deserialize(reader);
}
}
}
While debugging, saving operation seems consistent and not raising any error, but while loading; this is the raised error at this line;
ctransactionList = (List<CTransaction>)serializer.Deserialize(reader);
ERROR: There is an error in XML document (3, 4).
If you can help me, I'd really appreciate it.
Thanks in advance

Answer 1

Try this to make your class serializable:
[DataContract]
public class CTransaction
{
[DataMember]
public String Date1 { get; set; }
[DataMember]
public String Amount1 { get; set; }
[DataMember]
public String Type1 { get; set; }
[DataMember]
public String Time1 { get; set; }
[DataMember]
public String Dis1 { get; set; }
[DataMember]
public String Def1 { get; set; }
public CTransaction(String date1, String amount1, String type1, String time1, String dis1, String def1)
{
//your code
}
}
then change the load and save methods to:
public List<CTransaction> LoadFromIsolatedStorage()
{
List<CTransaction> ret = new List<CTransaction>();
try
{
var store = IsolatedStorageFile.GetUserStoreForApplication();
if (store.FileExists("saver"))
{
using (var stream = new IsolatedStorageFileStream("saver", FileMode.OpenOrCreate, FileAccess.Read, store))
{
if (stream.Length > 0)
{
DataContractSerializer dcs = new DataContractSerializer(typeof(List<CTransaction>));
ret = dcs.ReadObject(stream) as List<CTransaction>;
}
}
}
}
catch (Exception ex)
{
// handle exception
}
}
public void SaveToIsolatedStorage(List<CTransaction> listToSave)
{
var store = IsolatedStorageFile.GetUserStoreForApplication();
if (store.FileExists("saver"))
{
store.DeleteFile("saver");
}
using (var stream = new IsolatedStorageFileStream("saver", FileMode.OpenOrCreate, FileAccess.Write, store))
{
DataContractSerializer dcs = new DataContractSerializer(typeof(List<CTransaction>));
dcs.WriteObject(stream, ctransactionList);
}
}