How can I parse XML in WP7? - windows-phone-7

How to parser this xml content.
<Content>
<caption> Today Headline </caption>
<s1>
<name>6</name>
<name>4</name>
<name>4</name>
</s1>
<s2>
<name>3</name>
<name>6</name>
<name>0</name>
</s2>
</Content>
Mycode:
date = (from story
in xmlParser.Descendants("s1")
select new EspnViewModel
{
Category = story.Element("name").Value,
}).ToList();
return data;
I'm having a hard time trying to figure out how to parse everything out.

Why dont you use xmlParser.Descendants("name") instead?
EDIT:
var caption = xmlParser.Descendants("caption").First().InnerText;
var names = from story in xmlParser.Descendants("name")
select new EspnViewModel
{
Category = story.InnerText
}).ToList();
Note: I am writing this in haste, but you get the idea..

private List<yourclass> ReadList()
{
using (IsolatedStorageFile myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication())
{
if (myIsolatedStorage.FileExists("xmlName.xml"))
{
using (IsolatedStorageFileStream stream = myIsolatedStorage.OpenFile("xmlName.xml", FileMode.Open))
{
XmlSerializer serializer = new XmlSerializer(typeof(List<your class>));
List<yourclass> data = (List<yourclass>)serializer.Deserialize(stream);
return data.ToList();
}
}
else
{
return null;
}
}
}

Related

skipping Rows in a CSV file to a certain word C#

I am new to C# coding and I have really tried to find an answer in any forum. I am using CSVHelper to read a CSV file and I want to skip a certain number of lines from the beginning of the file to a certain word. Now my code gives the following error message:
System.ObjectDisposedException: "Cannot read from a closed TextReader." Help me please :
private void cmdLoad_Click(object sender, EventArgs e)
{
OpenFileDialog OFDReader = new OpenFileDialog()
{ };
if (OFDReader.ShowDialog() == DialogResult.OK)
{
txtbox.Text = OFDReader.FileName;
}
var config = new CsvConfiguration(CultureInfo.InvariantCulture)
{
Delimiter = ";", // Set delimiter
HasHeaderRecord = true,
//ShouldSkipRecord = (row) => row.Record[0].Contains("Date/Time"),
};
using (var reader = new StreamReader(OFDReader.FileName))
using (var csv = new CsvReader(reader, config))
{
//search for Line to start reader
string record = "Date/Time";
while (csv.Read())
{
if (csv.Read().Equals(record))
{
csv.Read();
csv.ReadHeader();
break;
}
using (var dr = new CsvDataReader(csv))
{
var dt = new DataTable();
dt.Load(dr);
dataGridView1.DataSource = dt; // Set datagridview source to datatable
}
}
}
}
}
}
I believe you just need to break out of the while (csv.Read()) when you find the "Date/Time" text. The CsvReader will do the rest from there.
var config = new CsvConfiguration(CultureInfo.InvariantCulture)
{
Delimiter = ";", // Set delimiter
HasHeaderRecord = true
};
using (var reader = new StreamReader(OFDReader.FileName))
using (var csv = new CsvReader(reader, config))
{
//search for Line to start reader
string record = "Date/Time";
while (csv.Read())
{
if (csv.Context.Parser.RawRecord.Trim() == record)
{
break;
}
}
using (var dr = new CsvDataReader(csv))
{
var dt = new DataTable();
dt.Load(dr);
dt.Dump();
}
}

Rename a recorded file every time I save a record in xamarin

I am saving my records using this code:
string path = Android.OS.Environment.ExternalStorageDirectory.AbsolutePath;
public string fileName { get; set; }
fileName = Path.Combine(path, "sample.wav");
if (!recorder.IsRecording)
{
recorder.StopRecordingOnSilence = TimeoutSwitch.IsToggled;
//Start recording
var audioRecordTask = await recorder.StartRecording();
BtnDoneRec.IsEnabled = false;
await audioRecordTask;
RecEditor.IsEnabled = true;
BtnDoneRec.IsEnabled = false;
PlayButton.IsEnabled = true;
var filePath = recorder.GetAudioFilePath();
if (filePath != null)
{
var stream = recorder.GetAudioFileStream();
using (var fileStream = new FileStream(fileName, FileMode.Create, FileAccess.Write))
{
stream.CopyTo(fileStream);
}
}
}
else
{
//stop recording ...
await recorder.StopRecording();
}
I want my record to have a specific name which is labeled with my RecEditor
using (var streamReader = new StreamReader(fileName))
{
File.Move("sample.wav", RecEditor.Text + ".wav");
}
So it will rename "sample.wav" to "RecEditor text.wav" every time I click my save button.
But when I click save, it gives me this record
System.IO.FileNotFoundException: 'Could not find file '/sample.wav'.'
The record is stored in /storage/emulated/0/sample.wav
The sample.wav is created in my device but I don't know why it give me 'Could not find file '/sample.wav'.' error. What am i doing wrong here?
I believe that what you're looking is something like this:
if(File.Exists(fileName))
{
var newFileName = Path.Combine(path, $"{RecEditor.Text}.wav");
File.Move(fileName, newFileName);
}
You don't need to open a new Stream as you are doing. Also, you need to put the full file path not only the file name.
You might want to validate that RecEditor.Text is not empty before using its value for the newfileName
Hope this helps.-

Xamarin forms: Picture extension is not saving with path in android when do multiple photo selection

I am following this article for Select Multiple Images From Gallery in Xamarin Forms.
I completed the feature in android part but the picture path contains only the picture name, extensions are missing when saving path.
To upload the image to the server I need the complete image name with extension. So how can I save the complete path of the selected images with the extension?
Following method capture the image path:
public String GetRealPathFromURI(Android.Net.Uri contentURI)
{
try
{
ICursor imageCursor = null;
string fullPathToImage = "";
imageCursor = ContentResolver.Query(contentURI, null, null, null, null);
imageCursor.MoveToFirst();
int idx = imageCursor.GetColumnIndex(MediaStore.Images.ImageColumns.Data);
if (idx != -1)
{
fullPathToImage = imageCursor.GetString(idx);
}
else
{
ICursor cursor = null;
var docID = DocumentsContract.GetDocumentId(contentURI);
var id = docID.Split(':')[1];
var whereSelect = MediaStore.Images.ImageColumns.Id + "=?";
var projections = new string[] { MediaStore.Images.ImageColumns.Data };
cursor = ContentResolver.Query(MediaStore.Images.Media.InternalContentUri, projections, whereSelect, new string[] { id }, null);
if (cursor.Count == 0)
{
cursor = ContentResolver.Query(MediaStore.Images.Media.ExternalContentUri, projections, whereSelect, new string[] { id }, null);
}
var colData = cursor.GetColumnIndexOrThrow(MediaStore.Images.ImageColumns.Data);
cursor.MoveToFirst();
fullPathToImage = cursor.GetString(colData);
}
return fullPathToImage;
}
catch (Exception ex)
{
Toast.MakeText(Xamarin.Forms.Forms.Context, "Unable to get path", ToastLength.Long).Show();
}
return null;
}
The extension(.png or .jpg) was missing not from the GetRealPathFromURI(), it happens in ImageHelpers.SaveFile(). So I save the filename to another variable from the path using Path.GetFileName() like below and pass the complete filename when call ImageHelpers.SaveFile().
var fileName = Path.GetFileName(picturepath);

How can improve this Linq query expressions performance?

public bool SaveValidTicketNos(string id,string[] ticketNos, string checkType, string checkMan)
{
bool result = false;
List<Carstartlistticket>enties=new List<Carstartlistticket>();
using (var context = new MiniSysDataContext())
{
try
{
foreach (var ticketNo in ticketNos)
{
Orderticket temp = context.Orderticket.ByTicketNo(ticketNo).SingleOrDefault();
if (temp != null)
{
Ticketline ticketline= temp.Ticketline;
string currencyType = temp.CurrencyType;
float personAllowance=GetPersonCountAllowance(context,ticketline, currencyType);
Carstartlistticket carstartlistticket = new Carstartlistticket()
{
CsltId = Guid.NewGuid().ToString(),
Carstartlist = new Carstartlist(){CslId = id},
LeaveDate = temp.LeaveDate,
OnPointName = temp.OnpointName,
OffPointName = temp.OffpointName,
OutTicketMan = temp.OutBy,
TicketNo = temp.TicketNo,
ChekMan = checkMan,
Type = string.IsNullOrEmpty(checkType)?(short?)null:Convert.ToInt16(checkType),
CreatedOn = DateTime.Now,
CreatedBy = checkMan,
NumbserAllowance = personAllowance
};
enties.Add(carstartlistticket);
}
}
context.BeginTransaction();
context.Carstartlistticket.InsertAllOnSubmit(enties);
context.SubmitChanges();
bool changeStateResult=ChangeTicketState(context, ticketNos,checkMan);
if(changeStateResult)
{
context.CommitTransaction();
result = true;
}
else
{
context.RollbackTransaction();
}
}
catch (Exception e)
{
LogHelper.WriteLog(string.Format("CarstartlistService.SaveValidTicketNos({0},{1},{2},{3})",id,ticketNos,checkType,checkMan),e);
context.RollbackTransaction();
}
}
return result;
}
My code is above. I doubt these code have terrible poor performance. The poor performance in the point
Orderticket temp = context.Orderticket.ByTicketNo(ticketNo).SingleOrDefault();
,actually, I got an string array through the method args,then I want to get all data by ticketNos from database, here i use a loop,I know if i write my code like that ,there will be cause performance problem and it will lead one more time database access,how can avoid this problem and improve the code performance,for example ,geting all data by only on databse access
I forget to tell you the ORM I use ,en ,the ORM is PlinqO based NHibernate
i am looking forward to having your every answer,thank you
using plain NHibernate
var tickets = session.QueryOver<OrderTicket>()
.WhereRestrictionOn(x => x.TicketNo).IsIn(ticketNos)
.List();
short? type = null;
short typeValue;
if (!string.IsNullOrEmpty(checkType) && short.TryParse(checkType, out typeValue))
type = typeValue;
var entitiesToSave = tickets.Select(ticket => new Carstartlistticket
{
CsltId = Guid.NewGuid().ToString(),
Carstartlist = new Carstartlist() { CslId = id },
LeaveDate = ticket.LeaveDate,
OnPointName = ticket.OnpointName,
OffPointName = ticket.OffpointName,
OutTicketMan = ticket.OutBy,
TicketNo = ticket.TicketNo,
ChekMan = checkMan,
CreatedOn = DateTime.Now,
CreatedBy = checkMan,
Type = type,
NumbserAllowance = GetPersonCountAllowance(context, ticket.Ticketline, ticket.CurrencyType)
});
foreach (var entity in entitiesToSave)
{
session.Save(entity);
}
to enhance this further try to preload all needed PersonCountAllowances

How to save stream of image data to the root of the local app data folder in windows phone?

I am trying to save the stream of image data to a file. I was able to save it to Pictures library though.
But I want to save it to a file in the root of my application/ project.
I was trying the below but it doesn't work.
using (MediaLibrary mediaLibrary = new MediaLibrary())
mediaLibrary.SavePicture(#"\DefaultScreen.jpg", stream);
In this case you should use LocalStorage.
Here is a simple solution to do this:
using (IsolatedStorageFile isoStore = IsolatedStorageFile.GetUserStoreForApplication())
{
if (!isoStore.FileExists(fileName)
{
var sr = Application.GetResourceStream(new Uri(fileName, UriKind.Relative));
using (var br = new BinaryReader(sr.Stream))
{
byte[] data = br.ReadBytes((int)sr.Stream.Length);
string strBaseDir = string.Empty;
const string DelimStr = "/";
char[] delimiter = DelimStr.ToCharArray();
string[] dirsPath = fileName.Split(delimiter);
// Recreate the directory structure
for (int i = 0; i < dirsPath.Length - 1; i++)
{
strBaseDir = Path.Combine(strBaseDir, dirsPath[i]);
isoStore.CreateDirectory(strBaseDir);
}
using (BinaryWriter bw = new BinaryWriter(isoStore.CreateFile(fileName)))
{
bw.Write(data);
}
}
}
}
Here you can find all info about data in Windows Phone:
http://msdn.microsoft.com/en-us/library/windowsphone/develop/ff402541(v=vs.105).aspx

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