I am working on setting Date and Time on Windows Embedded Standard 7 OS using C# .net.
I tried changing the system date using code in following link.
http://www.pinvoke.net/default.aspx/kernel32.setsystemtime
But I also saw that one should get the privileges to change the same. But I am receiving an error. here is the code to
Privileges.EnablePrivilege(SecurityEntity.SE_SYSTEMTIME_NAME);
if (SetSystemTime(ref st) == 0)
{
return 0;
}
return 1;
For getting the privaleges I used the code from the following link.
http://www.pinvoke.net/default.aspx/advapi32/AdjustTokenPrivileges.html
C# Sample Code 2 (With full error handling):
I have question:
Is it possible to change the Date and Time using PInvoke. If it is possible what are the change/Setting I should do at the OS.
And what are the other ways to change the date and time.
thank you
Edit:
[DllImport("kernel32.dll")]
extern static uint SetSystemTime(ref SYSTEMTIME lpSystemTime);
public int SetSystemDateTime(DateTime NewSystemDateTime)
{
SYSTEMTIME st = new SYSTEMTIME();
st.wYear = (ushort)NewSystemDateTime.Year;
st.wMonth = (ushort)NewSystemDateTime.Month;
st.wDay = (ushort)NewSystemDateTime.Day;
st.wHour = (ushort)NewSystemDateTime.Hour;
st.wMinute = (ushort)NewSystemDateTime.Minute;
st.wMilliseconds = (ushort)NewSystemDateTime.Millisecond;
Privileges.EnablePrivilege(SecurityEntity.SE_SYSTEMTIME_NAME);
if (SetSystemTime(ref st) == 0)
{
return 0;
}
return 1;
}
Ok I did some research and I tried few things. You need admin permissions to change system date and time, one solution is to add
<requestedExecutionLevel level="requireAdministrator" uiAccess="false" />
to application manifest file, this way the application will always ask user for permissions.
On code project there is an article that maybe able to help ypu without adding manifest file.
http://www.codeproject.com/Articles/125810/A-complete-Impersonation-Demo-in-C-NET
I finally found the solution. Code in the following link works fine for me:
http://www.pinvoke.net/default.aspx/kernel32/SetLocalTime.html
Also following code I found in one of the posts in stackoverflow, helped me.
using System.Security.Principal;
bool IsUserAdministrator()
{
bool isAdmin;
try
{
WindowsIdentity user = WindowsIdentity.GetCurrent();
WindowsPrincipal principal = new WindowsPrincipal(user);
isAdmin = principal.IsInRole(WindowsBuiltInRole.Administrator);
}
catch (UnauthorizedAccessException ex)
{
isAdmin = false;
}
catch (Exception ex)
{
isAdmin = false;
}
return isAdmin;
}
Related
Im trying to make a bot that sends a pm when someone joins a server, and then assigns a role based on reply to said Pm.
This is the following code i have so far for onMessageRecieved, issue is that user.getMutualGuilds() returns an empty list even though they are part of the same server as the bot.
#Override
public void onMessageReceived(MessageReceivedEvent event) {
String DmRecieved = event.getMessage().getContentRaw();
User user = event.getAuthor();
boolean isBot = user.isBot();
boolean startsWithAU = DmRecieved.toUpperCase().startsWith("AU", 0);
boolean messageTooLong = DmRecieved.length() > 8;
if (event.getMessage().getContentRaw().isEmpty()) return;
if (isBot) return;
if (!startsWithAU || messageTooLong) {
user.openPrivateChannel().queue((chanel1 ->
chanel1.sendMessage("Not valid AU ID, please try again.").queue()));
} else {
List<Guild> guilds = user.getMutualGuilds();
System.out.println(guilds);
}
}
I found the fix. The members needed to be cached in memory this was done by adding the following line to the JDA:
jda.setMemberCachePolicy(member -> true);
I'm trying to implement Xamairn Auth with my app. I've installed the nuget package from https://www.nuget.org/packages/Xamarin.Auth.
Following their example I have the following code in the shared project.
public void SaveCredentials (string userName, string password)
{
if (!string.IsNullOrWhiteSpace (userName) && !string.IsNullOrWhiteSpace (password)) {
Account account = new Account {
Username = userName
};
account.Properties.Add ("Password", password);
AccountStore.Create ().Save (account, App.AppName);
}
}
When run on android, it saves the username and password but I'm getting the following message in the console:
"This version is insecure, because of default password.
Please use version with supplied password for AccountStore.
AccountStore.Create(Contex, string) or AccountStore.Create(string);"
I tried passing a parameter to the AccountStore.Create() method but it doesn't seem to take one. Something like this:
#if ANDROID
_accountStore = AccountStore.Create(Application.Context);
#else
_accountStore = AccountStore.Create();
#endif
Do I need to write android specific code to extend the create method.
I understand why you deleted the non-answer, I thought that would show interest in the question. I guess I should have upvoted the question instead. Anyways, here's the answer I found.
You can't use the PCL version for android. It doesn't have an option to add a password. I used the android specific version. Will call it using dependency service.
Here's an example:
Account account = null;
try
{
//account = AccountStore.Create(Application.ApplicationContext, "System.Char[]").FindAccountsForService("My APP").FirstOrDefault();
var aStore = AccountStore.Create(Application.ApplicationContext, "myownpassword");
// save test
account = aStore.FindAccountsForService(Constants.AppName).FirstOrDefault();
if (account == null)
account = new Account();
account.Username = "bobbafett";
account.Properties["pswd"] = "haha";
aStore.Save(account, Constants.AppName);
// delete test, doesn't seem to work, account is still found
var accts = aStore.FindAccountsForService(Constants.AppName);
int howMany = accts.ToList().Count;
foreach (var acct in accts)
{
aStore.Delete(acct, Constants.AppName);
}
account = aStore.FindAccountsForService(Constants.AppName).FirstOrDefault();
}
catch (Java.IO.IOException ex)
{
// This part is not invoked anymore once I use the suggested password.
int i1 = 123;
}
I was able to get it to work by implementing a getAccountStore method in android which has an option to add a password, then use DependencyService to call it.
public AccountStore GetAccountStore()
{
try
{
var acctStore = AccountStore.Create(Application.Context, "somePassword");
return acctStore;
}
catch (Java.IO.IOException ex)
{
throw ex;
}
}
Then in your pcl project call it as such:
if (Device.RuntimePlatform == Device.Android)
_accountStore = DependencyService.Get<IAccountStoreHelper>().GetAccountStore();
else
_accountStore = AccountStore.Create();
I created a class that connected to the API to retrieve the required data using httpclient. That file was called in the code behind file of the view and worked perfectly. Than I decided to implement the MVVM approach. As a result, I moved the code that initialized the rest service class to the view-model.
After doing that, i stopped getting the data. To investigate, I stated the the debugging session with the breakpoint placed at the line where i initialize the rest service class. Than i executed that line. By doing that, I found out that a huge android mono exception is thrown and the debugging session if stopped. The app exits the debugging session.
This has happened for the first time since i stated developing my app in Xamarin Forms. I have no idea about why it is breaking like that. Your help will be greatly appreciated.
This is the code that was working properly.
In the view code behind file
[XamlCompilation(XamlCompilationOptions.Compile)]
public partial class SubtaskPage : ContentPage
{
protected override void OnAppearing()
{
base.OnAppearing();
PopulateSubtaskData();
}
private async void PopulateSubtaskData()
{
lstSubtasks.IsRefreshing = true;
try
{
RestService rs = new RestService();
SResponse = await rs.GetSubtasksAsync(Convert.ToInt32(Application.Current.Properties["UserId"]));
if (SResponse.Status == 1)
{
lstSubtasks.ItemsSource = SResponse.Subtasks;
}
else
{
await DisplayAlert("Error", SResponse.Message, "Ok");
}
}
catch (Exception E)
{
Debug.WriteLine(#"GetSubtasksAsync -> ERROR {0}", E.Message);
}
lstSubtasks.IsRefreshing = false;
}
}
The rest service class is as follows
This class is in a separate folder named "Services". ip and url have been changed for security reason.
class RestService
{
HttpClient client;
public List<Ticket> Tickets { get; private set; }
string Server1 = "server ip";
string Server2 = "server ip";
public RestService()
{
client = new HttpClient();
client.MaxResponseContentBufferSize = 256000;
}
public async Task<SubtasksResponse> GetSubtasksAsync(int UserId)
{
SubtasksResponse SubtaskResponse = new SubtasksResponse();
string ApiUrl = "URL";
string Url = "";
HttpResponseMessage response;
if (CrossConnectivity.Current.IsConnected)
{
Url = await GetActiveServerAsync();
if (Url != "")
{
var uri = string.Format(Url + ApiUrl, UserId);
try
{
response = await client.GetAsync(uri);
if (response.IsSuccessStatusCode)
{
var content = await response.Content.ReadAsStringAsync();
SubtaskResponse.Subtasks = JsonConvert.DeserializeObject<List<Ticket>>(content);
SubtaskResponse.Status = 1;
}
else
{
SubtaskResponse.Subtasks = null;
SubtaskResponse.Status = 0;
SubtaskResponse.Message = "Attempt to fetch data from server was unsuccessful. Please try again";
}
}
catch (Exception E)
{
SubtaskResponse.Subtasks = null;
SubtaskResponse.Status = 0;
SubtaskResponse.Message = "Error occured while fetching data from the server. Please try again";
}
}
else
{
SubtaskResponse.Subtasks = null;
SubtaskResponse.Status = 0;
SubtaskResponse.Message = "Remote Server Not Responding! Please try again later";
}
}
else
{
SubtaskResponse.Subtasks = null;
SubtaskResponse.Status = 0;
SubtaskResponse.Message = "No Network Connection Found! Please connect to a network and try again";
}
return SubtaskResponse;
}
}
}
This was working fine until I added the view model into the mix.
This is how I am calling the function in the view model.
async Task<SubtasksResponse> PopulateSubtaskList()
{
RestService rs = new RestService();
IsBusy = true;
_subtaskList = await rs.GetSubtasksAsync(Convert.ToInt32(Application.Current.Properties["UserId"]));
IsBusy = false;
return _subtaskList;
}
"RestService rs = new RestService();" this is the line where the code breaks.
Here is the image of the exception that occurs when the code breaks.
Hope you get the clear picture of the situation. Please let me know if additional information is required.
Thanks
Don't do this. If you want to call rest from a mvvm Xamarin Forms app I can advice Refit. All the difficult work is already done for you and abstracted away. With a few lines of code you are up and running.
BTW the error message you are showing probably has nothing to do with your code but is a bug in a recent Xamarin version. See here: https://bugzilla.xamarin.com/show_bug.cgi?id=56787
Found the answer on this page (https://releases.xamarin.com/common-issues-in-the-xamarin-15-2-2-release-being-tracked-by-the-xamarin-team/).
The solution is as follows
Download the missing Mono.Posix file and unzip the archive.
Right-click the Mono.Posix.dll file in Explorer and select Properties.
Check the Digital Signatures tab to ensure the file shows a valid Xamarin Inc. signature.
At the bottom of the General tab, if an Unblock checkbox appears, enable it and select OK. (This checkbox appears depending on how the file was downloaded.)
For Visual Studio 2017, copy the Mono.Posix.dll file into the “Xamarin.VisualStudio” extension directory. For example, for a default installation of the Enterprise edition, copy the file into:
C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\Common7\IDE\Extensions\Xamarin.VisualStudio
For Visual Studio 2015, copy the file into the “Xamarin\Xamarin” extension directory:
C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\Extensions\Xamarin\Xamarin\
Quit and restart Visual Studio.
For more detail, visit the link given above.
I have a HP Scanjet 7000 (duplex & ADF scanner) and a HP Scanjet 5500c (only ADF) and a scanner program I'm developing which uses WIA 2.0 on Windows 7.
The problem is that the code works perfectly on the older scanner model, but on the newer one the code seems to run just fine through the first page, then fail on the second. If I step through the code around the following line;
image = (WIA.ImageFile)wiaCommonDialog.ShowTransfer(item, wiaFormatTIFF, false);
the old scanner stops and waits for another call to be made on the same reference, but the newer one just runs through all it's pages from the feeder in one continuous operation.
I notice if I'm using the default scanning program in Windows 7, the newer one returns a single .tif file which contains all the separate pages. The older one returns separate .jpg files (one for each page).
This indicates to me that the newer scanner is scanning through its whole feeder before it is ready to return a collection of images where the older one returns ONE image between each page scanned.
How can I support this behavior in code? The following is part of the relevant code which works on the older scanner model:
public static List<Image> Scan(string scannerId)
{
List<Image> images = new List<Image>();
List<String> tmp_imageList = new List<String>();
bool hasMorePages = true;
bool useAdf = true;
bool duplex = false;
int pages = 0;
string fileName = null;
string fileName_duplex = null;
WIA.DeviceManager manager = null;
WIA.Device device = null;
WIA.DeviceInfo device_infoHolder = null;
WIA.Item item = null;
WIA.ICommonDialog wiaCommonDialog = null;
manager = new WIA.DeviceManager();
// select the correct scanner using the provided scannerId parameter
foreach (WIA.DeviceInfo info in manager.DeviceInfos)
{
if (info.DeviceID == scannerId)
{
// Find scanner to connect to
device_infoHolder = info;
break;
}
}
while (hasMorePages)
{
wiaCommonDialog = new WIA.CommonDialog();
// Connect to scanner
device = device_infoHolder.Connect();
if (device.Items[1] != null)
{
item = device.Items[1] as WIA.Item;
try
{
if ((useAdf) || (duplex))
SetupADF(device, duplex); //Sets the right properties in WIA
WIA.ImageFile image = null;
WIA.ImageFile image_duplex = null;
// scan image
image = (WIA.ImageFile)wiaCommonDialog.ShowTransfer(item, wiaFormatTIFF, false);
if (duplex)
{
image_duplex = (ImageFile)wiaCommonDialog.ShowTransfer(item, wiaFormatPNG, false);
}
// save (front) image to temp file
fileName = Path.GetTempFileName();
tmp_imageList.Add(fileName);
File.Delete(fileName);
image.SaveFile(fileName);
image = null;
// add file to images list
images.Add(Image.FromFile(fileName));
if (duplex)
{
fileName_duplex = Path.GetTempFileName();
tmp_imageList.Add(fileName_duplex);
File.Delete(fileName_duplex);
image_duplex.SaveFile(fileName_duplex);
image_duplex = null;
// add file_duplex to images list
images.Add(Image.FromFile(fileName_duplex));
}
if (useAdf || duplex)
{
hasMorePages = HasMorePages(device); //Returns true if the feeder has more pages
pages++;
}
}
catch (Exception exc)
{
throw exc;
}
finally
{
wiaCommonDialog = null;
manager = null;
item = null;
device = null;
}
}
}
device = null;
return images;
}
Any help on this issue would be very much appreciated! I can't seem to find a working solution on the web. Just unanswered forum posts from people with the same problem.
we had a very similar problem and various solutions, e.g. by setting certain properties, did not help. The main problem was that the scanner (ADF) retracted all pages on startup, regardless of what was happening in the program code.
The process repeatedly led to errors, since "too much" was made before the next page was scanned. This applies in particular to the fact that another "Connect" was attempted.
For this reason, we have modified the code so that the individual pages can be read in as quickly as possible:
public List<Image> Scan(string deviceID)
{
List<Image> images = new List<Image>();
WIA.ICommonDialog wiaCommonDialog = new WIA.CommonDialog();
WIA.Device device = this.Connect(deviceID);
if (device == null)
return images;
WIA.Item item = device.Items[1] as WIA.Item;
List<WIA.ImageFile> wiaImages = new List<ImageFile>();
try
{
// scan images
do
{
WIA.ImageFile image = (WIA.ImageFile)wiaCommonDialog.ShowTransfer(item, wiaFormatJPEG, false);
wiaImages.Add(image);
} while (true);
}
catch (System.Runtime.InteropServices.COMException ex)
{
if ((uint)ex.ErrorCode != WIA_PROPERTIES.WIA_ERROR_PAPER_EMPTY)
throw ex;
}
catch (Exception ex)
{
throw ex;
}
foreach (WIA.ImageFile image in wiaImages)
this.DoImage(images, image);
return images;
}
I see you're calling a method called SetupADF, which is not shown, that presumably sets some properties on the device object. Have you tried setting WIA_DPS_PAGES (property 3096) and/or WIA_DPS_SCAN_AHEAD_PAGES (property 3094)?
I have a blog post about scanning from an ADF in Silverlight, and I believe a commenter came up against the same issue you're having. Setting WIA_DPS_PAGES to 1 fixed it for him. I ended up modifying my code's SetDeviceProperties method to set WIA_DPS_PAGES to 1 and WIA_DPS_SCAN_AHEAD_PAGES to 0.
After alot of trial and error I stumbled upon a solution which worked for reasons I'm not quite sure of. It seems like the ShowTransfer() method was unable to convert the page to .png or .tiff WHILE scanning. Setting the format to JPEG or BMP actually solved the issue for me:
image = (ImageFile)scanDialog.ShowTransfer(item, wiaFormatJPEG, false);
I think I saw somewhere on the web that this method actually returns BMP regardless of the format specified. Might be that converting the image to png or tiff is too heavy as opposed to using bmp or jpeg.
On a sidenote, I'm setting the property setting: 3088 to 0x005 (adf AND duplex mode).
I'm trying to build a report to show the relative efficiency of my various build agents and having trouble getting the info I need out of the tool.
What I'd like to have is a simple grid with the following columns:
Build Number
Build Definition
Build Agent
Build Status
Build Start Time
Build Duration
Which would let me do something like chart the duration of successful builds of a given build definition on agent1 against the same build definition on agent2 through agentN.
How would I go about this?
My initial intention was to point you to TFS OLAP Cube & describe how you could retrieve what you were after. Then I realized that the cube does not provide with the info which Agent built what Build.Then I thought it would be simple to write a small TFS-console app that print the infos you 're after:
using System;
using Microsoft.TeamFoundation.Build.Client;
using Microsoft.TeamFoundation.Client;
namespace BuildDetails
{
class Program
{
static void Main()
{
TfsTeamProjectCollection teamProjectCollection = TfsTeamProjectCollectionFactory.GetTeamProjectCollection(new Uri("http://TFS:8080/tfs/CoLLeCtIoNNaMe"));
var buildService = (IBuildServer)teamProjectCollection.GetService(typeof(IBuildServer));
IBuildDefinition buildDefinition = buildService.GetBuildDefinition("TeamProjectName", "BuildDefinitionName");
IBuildDetail[] buildDetails = buildService.QueryBuilds(buildDefinition);
foreach (var buildDetail in buildDetails)
{
Console.Write(buildDetail.BuildNumber+"\t");
Console.Write(buildDefinition.Name+"\t");
Console.Write(buildDetail.BuildAgent.Name+"\t");
Console.Write(buildDetail.Status+"\t");
Console.Write(buildDetail.StartTime+"\t");
Console.WriteLine((buildDetail.FinishTime - buildDetail.StartTime).Minutes);
}
}
}
}
This won't compile, since
Eventually I dove into the IBuildInformationNode[] and got the build agent as follows:
IBuildInformation buildInformation = buildDetail.Information;
IBuildInformationNode[] buildInformationNodes = buildInformation.Nodes;
string agentName;
try
{
agentName = buildInformationNodes[0].Children.Nodes[3].Fields["ReservedAgentName"];
}
catch
{
agentName = "Couldn't determine BuildAgent";
}
Console.Write(agentName + "\t");
The try-catch is necessary, so you can deal with builds that failed/stopped before agent-selection.If you use this latter part as a substitute to the failing Console.Write(buildDetail.BuildAgent.Name+"\t"); you should end up with a console app, whose output can be piped into a *.CSV file & then imported to Excel.
The following code should help in getting the Build Agent Name for the given build detail.
private string GetBuildAgentName(IBuildDetail build)
{
var buildInformationNodes = build.Information.GetNodesByType("AgentScopeActivityTracking", true);
if (buildInformationNodes != null)
{
var node = buildInformationNodes.Find(s => s.Fields.ContainsKey(InformationFields.ReservedAgentName));
return node != null ? node.Fields[InformationFields.ReservedAgentName] : string.Empty;
}
return string.Empty;
}
Make sure that you have refresh the build information in the build details object.You can do so by the either calling the following code on your build Details object before getting the build agents
string[] refreshAllDetails = {"*"};
build.Refresh(refreshAllDetails, QueryOptions.Agents);
Hope it helps :)
The build agent information isn't always in the same place.
I found it for a build I was looking at in buildInformationNodes[1].Children.Nodes[2].Fields["ReservedAgentName"]. The following seems to work for me (so far).
private static string GetAgentName(IBuildDetail buildDetail)
{
string agentName = "Unknown";
bool fAgentFound = false;
try
{
foreach (IBuildInformationNode node in buildDetail.Information.Nodes)
{
foreach (IBuildInformationNode childNode in node.Children.Nodes)
{
if (childNode.Fields.ContainsKey("ReservedAgentName"))
{
agentName = childNode.Fields["ReservedAgentName"];
break;
}
}
if (fAgentFound) break;
}
}
catch (Exception ex)
{
// change to your own routine as needed
DumpException(ex);
}
return agentName;
}