I am trying to create a xamarin forms application, I am using dependency service to pick multiple files from device. I have written the following code for getting the actual file from Android.Net.Uri:
private string GetPathToAudioFile(global::Android.Net.Uri uri)
{
string doc_id = "";
using (var c1 = ContentResolver.Query(uri, null, null, null, null))
{
c1.MoveToFirst();
String document_id = c1.GetString(0);
doc_id = document_id.Substring(document_id.LastIndexOf(":") + 1);
}
string path = null;
// The projection contains the columns we want to return in our query.
string audioSelection = MediaStore.Audio.Media.InterfaceConsts.Id + " =? ";
using (var cursor = ManagedQuery(MediaStore.Audio.Media.ExternalContentUri, null, audioSelection, new string[] { doc_id }, null))
{
if (cursor == null) return path;
var columnIndex = cursor.GetColumnIndexOrThrow(MediaStore.Audio.Media.InterfaceConsts.Data);
cursor.MoveToFirst();
path = cursor.GetString(columnIndex);
}
return path;
}
But whenever, I try to do this I get the following exception. Cursor Exception
I am new to Xamarin and I don't know how to solve this problem. Please help me with this. Thanks in advance.
Related
I have this c# code where i am trying to get data from a wsdl in visual studio .
The code is okay but when i try to get the data to written on notepad it just shows an empty space :
WindowsService1.ServiceReference1.GetModifiedBookingsOperationResponse getModbkgsResp;
using (var proxy = new WindowsService1.ServiceReference1.InventoryServiceClient())
{
int noofBookings = 1;
getModbkgsResp = proxy.GetModifiedBookings(getModBkgsReq);
WindowsService1.ServiceReference1.Booking[] bookings = new WindowsService1.ServiceReference1.Booking[noofBookings];
getModbkgsResp.Bookings = new WindowsService1.ServiceReference1.Booking[noofBookings];
getModbkgsResp.Bookings = bookings;
if (getModbkgsResp.Bookings != null)
{
for (int i = 0; i < bookings.Length; i++)
{
Booking bk = new WindowsService1.ServiceReference1.Booking();
getModbkgsResp.Bookings[i] = bk;
if (bk != null )
{
bookingSource = bk.BookingSource;
if (bk.BookingId == Bookingcode)
{
this.WriteToFile("Booking Source =" + bookingSource + "");
}
else
{
this.WriteToFile("Sorry could not find your source of booking");
}
}
else
{
this.WriteToFile("Looks like source is null " );
}
}
}
else
{
this.WriteToFile("ERROR: Booking details not returned from GetModifiedBookings! " +StartDate);
}
}
I'm not sure why you are using the new keyword to create items that should have been retrieved from the service. Naturally anything created with new will be initialized with default values and will not contain any data that was retrieved from the service.
My guess is your code should look more like this:
using (var proxy = new WindowsService1.ServiceReference1.InventoryServiceClient())
{
var response = proxy.GetModifiedBookings(getModBkgsReq);
if (response.Bookings == null)
{
this.WriteToFile("ERROR: Booking details not returned from GetModifiedBookings! " +StartDate);
return;
}
var booking = response.Bookings.SingleOrDefault( b => b.BookingId == bookingCode);
if (booking == null)
{
this.WriteToFile("Sorry could not find your source of booking");
return;
}
var bookingSource = booking.BookingSource;
this.WriteToFile("Booking Source =" + bookingSource + "");
}
I am developing one application in web api and angularjs. I have file upload part. I am able to upload files and i am not storing files in webroot(i created folder called Uploads). My problem is i am not using any good naming convention to maintain uniqueness of files so there are chances of overriding files. I am new to angularjs so i refered below link. http://instinctcoder.com/angularjs-upload-multiple-files-to-asp-net-web-api/
This is my controller level code.
if (!Request.Content.IsMimeMultipartContent())
{
throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
}
var uploadPath = HttpContext.Current.Server.MapPath("~/Uploads");
var multipartFormDataStreamProvider = new CustomUploadMultipartFormProvider(uploadPath);
await Request.Content.ReadAsMultipartAsync(multipartFormDataStreamProvider);
var fileName = "";
DateTime dt = DateTime.Now;
foreach (var key in multipartFormDataStreamProvider.Contents)
{
var a = key.Headers;
fileName = a.ContentDisposition.FileName;
break;
}
foreach (var key in multipartFormDataStreamProvider.FormData.AllKeys)
{
foreach (var val in multipartFormDataStreamProvider.FormData.GetValues(key))
{
Console.WriteLine(string.Format("{0}: {1}", key, val));
}
}
In the above code I am trying to add date part to beginning of file name as below
string filenameNew = "App1" + DateTime.Now.ToString("yyyyMMddHHmmss");
fileName = filenameNew + a.ContentDisposition.FileName;
public CustomUploadMultipartFormProvider(string path) : base(path) { }
public override string GetLocalFileName(HttpContentHeaders headers)
{
string startwith = "Nor" + DateTime.Now.ToString("yyyyMMddHHmmss");
if (headers != null && headers.ContentDisposition != null)
{
return headers
.ContentDisposition
.FileName.TrimEnd('"').TrimStart('"').StartsWith("startwith").ToString();
}
return base.GetLocalFileName(headers);
}
This i tried but whatever the original file name that only comes. May I get some idea where can i append datepart to file while saving? Any help would be appreciated. Thank you.
I'm not sure what you're trying to do inside of the GetLocalFileName, this is pretty messed up.
First off, StartsWith returns a boolean (true or false) that indicates if the string starts with whatever you put in the parenthesis.
string str = "SIMPLE";
bool t = str.StartsWith("SIM"); // true
bool f = str.StartsWith("ZIM"); // false
The fact you're turning this bool back into a string and also passing the string "startsWith" into the method, means it will always return the string "false" (a bool value converted into a string) unless the real filename starts with "startsWith".
I think this is what you're looking for:
public override string GetLocalFileName(HttpContentHeaders headers)
{
string prefix = "Nor" + DateTime.Now.ToString("yyyyMMddHHmmss");
if (headers != null && headers.ContentDisposition != null)
{
var filename = headers.ContentDisposition.FileName.Trim('"');
return prefix + filename;
}
return base.GetLocalFileName(headers);
}
My suggestion for you is to learn the basics of C# and .Net a bit more, maybe read a C# book or something.
I'm looking to parse the WebCacheV01.dat file using C# to find the last file location for upload in an Internet browser.
%LocalAppData%\Microsoft\Windows\WebCache\WebCacheV01.dat
I using the Managed Esent nuget package.
Esent.Isam
Esent.Interop
When I try and run the below code it fails at:
Api.JetGetDatabaseFileInfo(filePath, out pageSize, JET_DbInfo.PageSize);
Or if I use
Api.JetSetSystemParameter(instance, JET_SESID.Nil, JET_param.CircularLog, 1, null);
at
Api.JetAttachDatabase(sesid, filePath, AttachDatabaseGrbit.ReadOnly);
I get the following error:
An unhandled exception of type
'Microsoft.Isam.Esent.Interop.EsentFileAccessDeniedException' occurred
in Esent.Interop.dll
Additional information: Cannot access file, the file is locked or in use
string localAppDataPath = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
string filePathExtra = #"\Microsoft\Windows\WebCache\WebCacheV01.dat";
string filePath = string.Format("{0}{1}", localAppDataPath, filePathExtra);
JET_INSTANCE instance;
JET_SESID sesid;
JET_DBID dbid;
JET_TABLEID tableid;
String connect = "";
JET_SNP snp;
JET_SNT snt;
object data;
int numInstance = 0;
JET_INSTANCE_INFO [] instances;
int pageSize;
JET_COLUMNDEF columndef = new JET_COLUMNDEF();
JET_COLUMNID columnid;
Api.JetCreateInstance(out instance, "instance");
Api.JetGetDatabaseFileInfo(filePath, out pageSize, JET_DbInfo.PageSize);
Api.JetSetSystemParameter(JET_INSTANCE.Nil, JET_SESID.Nil, JET_param.DatabasePageSize, pageSize, null);
//Api.JetSetSystemParameter(instance, JET_SESID.Nil, JET_param.CircularLog, 1, null);
Api.JetInit(ref instance);
Api.JetBeginSession(instance, out sesid, null, null);
//Do stuff in db
Api.JetEndSession(sesid, EndSessionGrbit.None);
Api.JetTerm(instance);
Is it not possible to read this without making modifications?
Viewer
http://www.nirsoft.net/utils/ese_database_view.html
Python
https://jon.glass/attempts-to-parse-webcachev01-dat/
libesedb
impacket
Issue:
The file is probably in use.
Solution:
in order to free the locked file, please stop the Schedule Task -\Microsoft\Windows\Wininet\CacheTask.
The Code
public override IEnumerable<string> GetBrowsingHistoryUrls(FileInfo fileInfo)
{
var fileName = fileInfo.FullName;
var results = new List<string>();
try
{
int pageSize;
Api.JetGetDatabaseFileInfo(fileName, out pageSize, JET_DbInfo.PageSize);
SystemParameters.DatabasePageSize = pageSize;
using (var instance = new Instance("Browsing History"))
{
var param = new InstanceParameters(instance);
param.Recovery = false;
instance.Init();
using (var session = new Session(instance))
{
Api.JetAttachDatabase(session, fileName, AttachDatabaseGrbit.ReadOnly);
JET_DBID dbid;
Api.JetOpenDatabase(session, fileName, null, out dbid, OpenDatabaseGrbit.ReadOnly);
using (var tableContainers = new Table(session, dbid, "Containers", OpenTableGrbit.ReadOnly))
{
IDictionary<string, JET_COLUMNID> containerColumns = Api.GetColumnDictionary(session, tableContainers);
if (Api.TryMoveFirst(session, tableContainers))
{
do
{
var retrieveColumnAsInt32 = Api.RetrieveColumnAsInt32(session, tableContainers, columnIds["ContainerId"]);
if (retrieveColumnAsInt32 != null)
{
var containerId = (int)retrieveColumnAsInt32;
using (var table = new Table(session, dbid, "Container_" + containerId, OpenTableGrbit.ReadOnly))
{
var tableColumns = Api.GetColumnDictionary(session, table);
if (Api.TryMoveFirst(session, table))
{
do
{
var url = Api.RetrieveColumnAsString(
session,
table,
tableColumns["Url"],
Encoding.Unicode);
var downloadedFileName = Api.RetrieveColumnAsString(
session,
table,
columnIds2["Filename"]);
if(string.IsNullOrEmpty(downloadedFileName)) // check for download history only.
continue;
// Order by access Time to find the last uploaded file.
var accessedTime = Api.RetrieveColumnAsInt64(
session,
table,
columnIds2["AccessedTime"]);
var lastVisitTime = accessedTime.HasValue ? DateTime.FromFileTimeUtc(accessedTime.Value) : DateTime.MinValue;
results.Add(url);
}
while (Api.TryMoveNext(session, table.JetTableid));
}
}
}
} while (Api.TryMoveNext(session, tableContainers));
}
}
}
}
}
catch (Exception ex)
{
// log goes here....
}
return results;
}
Utils
Task Scheduler Wrapper
You can use Microsoft.Win32.TaskScheduler.TaskService Wrapper to stop it using c#, just add this Nuget package [nuget]:https://taskscheduler.codeplex.com/
Usage
public static FileInfo CopyLockedFileRtl(DirectoryInfo directory, FileInfo fileInfo, string remoteEndPoint)
{
FileInfo copiedFileInfo = null;
using (var ts = new TaskService(string.Format(#"\\{0}", remoteEndPoint)))
{
var task = ts.GetTask(#"\Microsoft\Windows\Wininet\CacheTask");
task.Stop();
task.Enabled = false;
var byteArray = FileHelper.ReadOnlyAllBytes(fileInfo);
var filePath = Path.Combine(directory.FullName, "unlockedfile.dat");
File.WriteAllBytes(filePath, byteArray);
copiedFileInfo = new FileInfo(filePath);
task.Enabled = true;
task.Run();
task.Dispose();
}
return copiedFileInfo;
}
I was not able to get Adam's answer to work. What worked for me was making a copy with AlphaVSS (a .NET class library that has a managed API for the Volume Shadow Copy Service). The file was in "Dirty Shutdown" state, so I additionally wrote this to handle the exception it threw when I opened it:
catch (EsentErrorException ex)
{ // Usually after the database is copied, it's in Dirty Shutdown state
// This can be verified by running "esentutl.exe /Mh WebCacheV01.dat"
logger.Info(ex.Message);
switch (ex.Error)
{
case JET_err.SecondaryIndexCorrupted:
logger.Info("Secondary Index Corrupted detected, exiting...");
Api.JetTerm2(instance, TermGrbit.Complete);
return false;
case JET_err.DatabaseDirtyShutdown:
logger.Info("Dirty shutdown detected, attempting to recover...");
try
{
Api.JetTerm2(instance, TermGrbit.Complete);
Process.Start("esentutl.exe", "/p /o " + newPath);
Thread.Sleep(5000);
Api.JetInit(ref instance);
Api.JetBeginSession(instance, out sessionId, null, null);
Api.JetAttachDatabase(sessionId, newPath, AttachDatabaseGrbit.None);
}
catch (Exception e2)
{
logger.Info("Could not recover database " + newPath + ", will try opening it one last time. If that doesn't work, try using other esentutl commands", e2);
}
break;
}
}
I'm thinking about using the 'Recent Items' folder as when you select a file to upload an entry is written here:
C:\Users\USER\AppData\Roaming\Microsoft\Windows\Recent
string recent = (Environment.GetFolderPath(Environment.SpecialFolder.Recent));
I want to read properties of MSI in C# in desktop application.I am using following code:
public static string GetMSIProperty( string msiFile, string msiProperty)
{
string retVal= string.Empty ;
Type classType = Type.GetTypeFromProgID("WindowsInstaller.Installer");
Object installerObj = Activator.CreateInstance(classType);
WindowsInstaller.Installer installer = installerObj as WindowsInstaller.Installer;
Database database = installer.OpenDatabase("C:\\DataP\\sqlncli.msi",0 );
string sql = String.Format("SELECT Value FROM Property WHERE Property=’{0}’", msiProperty);
View view = database.OpenView(sql);
Record record = view.Fetch();
if (record != null)
{
retVal = record.get_StringData(1);
}
else
retVal = "Property Not Found";
return retVal;
}
But I am getting error as System.Runtime.InteropServices.COMException was unhandled.
the sqlncli.msi file is physically placed at c:\DataP location. While debugging I found that database does not contain the data after installer.OpenDatabase() statement.
How can I resolve this issue and get MSI properties in C#?
Windows Installer XML's Deployment Tools Foundation (WiX DTF) is an Open Source project from Microsoft which includes the Microsoft.Deployment.WindowsInstaller MSI interop library. It's far easier and more reliable to use this to do these sorts of queries. It even has a LINQ to MSI provider that allows you to treat MSI tables as entities and write queries against them.
using System;
using System.Linq;
using Microsoft.Deployment.WindowsInstaller;
using Microsoft.Deployment.WindowsInstaller.Linq;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
using(var database = new QDatabase(#"C:\tfs\iswix.msi", DatabaseOpenMode.ReadOnly))
{
var properties = from p in database.Properties
select p;
foreach (var property in properties)
{
Console.WriteLine("{0} = {1}", property.Property, property.Value);
}
}
using (var database = new Database(#"C:\tfs\iswix.msi", DatabaseOpenMode.ReadOnly))
{
using(var view = database.OpenView(database.Tables["Property"].SqlSelectString))
{
view.Execute();
foreach (var rec in view) using (rec)
{
Console.WriteLine("{0} = {1}", rec.GetString("Property"), rec.GetString("Value"));
}
}
}
Console.Read();
}
}
}
I did it in following way:
String inputFile = #"C:\\Rohan\\sqlncli.msi";
// Get the type of the Windows Installer object
Type installerType = Type.GetTypeFromProgID("WindowsInstaller.Installer");
// Create the Windows Installer object
WindowsInstaller.Installer installer = (WindowsInstaller.Installer)Activator.CreateInstance(installerType);
// Open the MSI database in the input file
Database database = installer.OpenDatabase(inputFile, 0);
// Open a view on the Property table for the version property
View view = database.OpenView("SELECT * FROM _Tables");
// Execute the view query
view.Execute(null);
// Get the record from the view
Record record = view.Fetch();
while (record != null)
{
Console.WriteLine(record.get_StringData(0) + '=' + record.get_StringData(1) + '=' + record.get_StringData(2) + '=' + record.get_StringData(3));
record = view.Fetch();
}
And its working for me.
The SQL string is incorrect. It should be:
SELECT `Value` FROM `Property` WHERE `Property`.`Property` = ’{0}’
I was trying to re-use this code, and the only change I had to make to get the code posted by Devashri to work is this line:
string sql = String.Format("SELECT `Value` FROM `Property` WHERE `Property`='{0}'", msiProperty);
Watch out for the single quotes!
as of 04/2020 it would be
Type installerType { get; set; }
WindowsInstaller.Installer installerObj { get; set; }
...
installerType = Type.GetTypeFromProgID("WindowsInstaller.Installer");
installerObj = (WindowsInstaller.Installer)Activator.CreateInstance(installerType);
var installer = installerObj as WindowsInstaller.Installer;
...
private void lnkSelectMsi_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
{
WindowsInstaller.Database msiDatabase = installerObj.OpenDatabase(txtMsiPath.Text, 0);
readMsiTableColumn(msiDatabase, cmbTable.Text, cmbColumn.Text);
}
private void readMsiTableColumn(WindowsInstaller.Database msiDatabase, string table)
{
WindowsInstaller.View msiView = null;
Record record = null;
string s = string.Empty;
try
{
msiView = msiDatabase.OpenView($"Select * from _Columns");
msiView.Execute();
record = msiView.Fetch();
int k = 0;
while (record != null)
{
if (record.StringData[1].Equals(table, StringComparison.OrdinalIgnoreCase))
{
k++;
s += $"{record.StringData[3],-50} ";
}
record = msiView.Fetch();
}
s += nl;
s += "".PadRight(50 * k, '-') + nl;
msiView.Close();
msiView = msiDatabase.OpenView($"Select * from {table}");
msiView.Execute();
record = msiView.Fetch();
while (record != null)
{
string recordValue = string.Empty;
for (int i = 1; i < record.FieldCount + 1; i++)
{
try { recordValue += $"{record.StringData[i],-50} "; }
catch (Exception ex) { recordValue += $"{i}. err {ex.Message}; "; }
}
s += recordValue + nl;
record = msiView.Fetch();
}
msiView.Close();
txtRes.Text = s;
}
catch (Exception ex) { txtRes.Text = ex.Message; }
}
How can you create a new section in a OneNote 2010 notebook with c#? According to the API there is no method to do so. But there is a CreateNewPage Method so I wondering if there is something similiar for sections? If not, how can this be achieved except for manipulating the XML files (which is a task i'd like to avoid since I'm not experienced in it)?
Here is code snippet from my add on:
public bool AddNewSection(string SectionTitle, out string newSectionId)
{
try
{
string CurrParentId;
string CurrParentName;
string strPath;
CurrParentId = FindCurrentlyViewedSectionGroup(out CurrParentName);
if (string.IsNullOrWhiteSpace(CurrParentId) || string.IsNullOrWhiteSpace(CurrParentName))
{
CurrParentId = FindCurrentlyViewedNotebook(out CurrParentName);
if (string.IsNullOrWhiteSpace(CurrParentId) || string.IsNullOrWhiteSpace(CurrParentName))
{
newSectionId = string.Empty;
return false;
}
strPath = FindCurrentlyViewedItemPath("Notebook");
}
else
strPath = FindCurrentlyViewedItemPath("SectionGroup");
if (string.IsNullOrWhiteSpace(strPath))
{
newSectionId = string.Empty;
return false;
}
SectionTitle = SectionTitle.Replace(':', '\\');
SectionTitle = SectionTitle.Trim('\\');
strPath += "\\" + SectionTitle + ".one";
onApp.OpenHierarchy(strPath, null, out newSectionId, Microsoft.Office.Interop.OneNote.CreateFileType.cftSection);
onApp.NavigateTo(newSectionId, "", false);
}
catch
{
newSectionId = string.Empty;
return false;
}
return true;
}
Basically what I am doing here is to get the path of currently viewing Section Group or Notebook and then adding new section name to that path and then calling OpenHierarchy method. OpenHierarchy creates a new section with title provided and returns it's id.
Following is where I create a new section and Navigate to it:
onApp.OpenHierarchy(strPath, null, out newSectionId, Microsoft.Office.Interop.OneNote.CreateFileType.cftSection);
onApp.NavigateTo(newSectionId, "", false);
So can write something like:
static void CreateNewSectionMeetingsInWorkNotebook()
{
String strID;
OneNote.Application onApplication = new OneNote.Application();
onApplication.OpenHierarchy("C:\\Documents and Settings\\user\\My Documents\\OneNote Notebooks\\Work\\Meetings.one",
System.String.Empty, out strID, OneNote.CreateFileType.cftSection);
}