I have a folder named Folderć, which contains smth.jpg. As folder has letter ć in name, filepath is saved in database as Folder%C0%01%/smth.jpg.
Letter ć is saved as Hex code. This is not a problem while previewing image on website.
Problem happens when i am trying to make a subfolder in Folderć via C# function. Function gets filepath string, finds folder name and creates subfolder in it. As my string contains hex code instead of letter ć function cant find that path thus cant create subfolder.
That string is in UTF-8 format, so changing the encoding doesnt change anything.
Anyone knows where is problem and how to solve it?
You can encode the name with Base64:
public string ToBase64String(string text)
{
byte[] data = Encoding.UTF8.GetBytes(text);
return Convert.ToBase64String(data);
}
and use it string myEncFolderPath = ToBase64String(myFolderPath); before saving the string in the DB.
After you receive the string from the DB, you can decode it back to a normal string with:
public string FromBase64String(string base64)
{
byte[] data = Convert.FromBase64String(base64);
return Encoding.UTF8.GetString(data);
}
by using string myFolderPath = FromBase64String(myEncFolderPath);.
That way, you can save strings freely in the DB.
Related
first a depressing fact: https://www.base64decode.org/ can do what i want to do.
i´m trying to encode and decode (to and from base64) a model file (.shm) generated by the image processing tool MVTec Halcon because i want to store it in a xml file.
If i open it, it has this strange form:
HSTF ÿÿÿÿ¿€ Q¿ÙG®záH?Üä4©±w?Eè}‰#?ð ................
I´m using this methods to encode and decode it:
public static string Base64Encode(string text)
{
Byte[] textBytes = Encoding.Default.GetBytes(text);
return Convert.ToBase64String(textBytes);
}
public static string Base64Decode(string base64EncodedData)
{
Byte[] base64EncodedBytes = Convert.FromBase64String(base64EncodedData);
return Encoding.Default.GetString(base64EncodedBytes);
}
and calling the methods from a gui like this:
var model = File.ReadAllText(#"C:\Users\\Desktop\model_region_nut.txt");
var base64 = ImageConverter.Base64Encode(model);
File.WriteAllText(#"C:\Users\\Desktop\base64.txt", base64);
var modelneu = ImageConverter.Base64Decode(File.ReadAllText(#"C:\Users\\Desktop\base64.txt"));
File.WriteAllText(#"C:\Users\\Desktop\modelneu.txt", modelneu);
my result for modelneu is:
HSTF ?????? Q??G?z?H???4??w??E?}??#??
so you can see that there are lots of missing characters.. I guess the problem is caused by using .Default.
Thanks for your help,
Michel
If you're working with binary data, there is no reason at all to go through text decoding and encoding. Doing so only risks corrupting the data in various ways, even if you're using a consistent character encoding.
Just use File.ReadAllBytes() instead of File.ReadAllText() and skip the unnecessary Encoding step.
The problem is with reading file with unspecified encoding, check this question.
As mentioned there you can go with overload for ReadAllText to specify encoding and also for writing you must specofy encoding for WriteAllText I suggest using UTF-8 encoding so:
var model = File.ReadAllText(#"C:\Users\pichlerm\Desktop\model_region_nut.txt",Encoding.UTF8);
var base64 = ImageConverter.Base64Encode(model);
File.WriteAllText(#"C:\Users\\Desktop\base64.txt", base64,Encoding.UTF8);
var modelneu = ImageConverter.Base64Decode(File.ReadAllText(#"C:\Users\\Desktop\base64.txt"));
File.WriteAllText(#"C:\Users\pichlerm\Desktop\modelneu.txt", modelneu);
I'm trying to read a textfile name with special characters(Ex: Student_*_Details.txt) from a directory. When I try to read them it says it has illegal characters in the path as the textfile name has these special characters and unable to read the file.
Code:
using (StreamReader streamReader = new StreamReader(#"\\NKR1009FHN\Student_*_Details.txt"))
I' have used the below set of codes to remove the illegal characters from the filename. But in the streamReader if fails as the special characters are getting replaced and unable to find the file since the actual filename got changed due to the below method used.
private static string GetValidFileName(string fileName)
{
String ret = Regex.Replace(fileName.Trim(), "[^A-Za-z0-9_. ]+", "")
return ret.Replace(" ", String.Empty);
}
Is there any workaround to get this fixed?
Really appreciate suggestions.
I am submitting the ACA forms(tax year:2016) to the IRS, getting the below error
<ns3:FormBCTransmitterSubmissionDtl xmlns="urn:us:gov:treasury:irs:ext:aca:air:ty16" xmlns:ns2="urn:us:gov:treasury:irs:common" xmlns:ns3="urn:us:gov:treasury:irs:msg:form1094-1095BCtransmittermessage">
<ACATransmitterSubmissionDetail>
<TransmitterErrorDetailGrp>
<ns2:ErrorMessageDetail>
<ns2:ErrorMessageCd>MANIFEST-025</ns2:ErrorMessageCd>
<ns2:ErrorMessageTxt>Manifest 'ChecksumAugmentationNum' must match the IRS-calculated 'ChecksumAugmentationNum' value of the transmission</ns2:ErrorMessageTxt>
</ns2:ErrorMessageDetail>
</TransmitterErrorDetailGrp>
</ACATransmitterSubmissionDetail>
Attached is our MTOM format we are using to send it through A2A.
https://www.dropbox.com/home?preview=samplemtom.txt
I am also tried the ChecksumAugmentationNum value set as Lower case also.
Have you successfully transmitted for Tax Year 2015? I have seen another post related to this issue, but have not run into this issue while sending TY2015 (to AATS or Production) or TY2016 records to AATS. My checksum calculation has not changed, and is very simple.
I have two methods I use to create the checksum: GetChecksum(string) and GetMD5Hash(MD5, string). This approach worked for TY2015, and I expect it to work for TY2016. IIRC, I took this approach directly from MSDN.
The string I pass into the GetChecksum method is the contents of the Form Data Attachment. In my process, I output the XML document into the file system for audit purposes, so the attachment is a physical file for me to use and reference. I read the attachment into a string variable using File.ReadAllText(string path) method.
After generating the checksum my process also will check the checksum against the database and return whether or not that checksum exists (meaning it was used by another form). In the case where this is true, then I update the Contact Suffix, regenerate the Form Data and then regenerate the checksum; this is per the IRS rules for transmission.
This is what is currently working for me, and hopefully this helps you.
Application Callers:
This is what I am doing to call the Checksum calculation functions/routines. It should be noted, I am physically writing each Form Data XML file to the File System, then reading from that.
string AttachmentFileContents = "";
AttachmentFileContents = File.ReadAllText(FormDataFilePath);
string checkSumAugmentationNumber = new Checksum().GetChecksum(AttachmentFileContents);
Checksum Methods:
These are the two methods I use for Checksum Calculation.
public string GetChecksum(string stringToEncrpyt)
{
string hash = "";
using(MD5 md5Hash = MD5.Create())
{
hash = GetMD5Hash(md5Hash, stringToEncrpyt);
}
return hash;
}
private string GetMD5Hash(MD5 md5Hash, string input)
{
byte[] data = md5Hash.ComputeHash(Encoding.UTF8.GetBytes(input));
StringBuilder sb = new StringBuilder();
for (int i = 0; i < data.Length; i++)
{
sb.Append(data[i].ToString("x2"));
}
return sb.ToString();
}
I have a byte array that contains a pdf document and I want to open it in an ios application.
This is my code so far:
public static string WriteFileFromByteArray(string fileName, byte[] bytes)
{
var documentsPath = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
var filePath = Path.Combine(documentsPath, fileName);
File.WriteAllBytes(fileName, bytes);
return filePath;
}
Does any one know how to do so?
Not sure where exactly you are stuck up.
But there is an issue in the below line of code you have posted.
File.WriteAllBytes(**fileName**, bytes);// on this code you are using filename instead of filepath.
Use filePath variable instead of fileName as it just contains the name of a file.
Refer the below link for PDF viewer.
http://forums.xamarin.com/discussion/631/open-a-pdf-with-the-built-in-pdf-viewer
I currently am making a UI for a note keeper and was just going to preview documents etc, but i was wondering what file type i would need to create if instead i wanted to do things like tag the file etc, preferably in c#, basically make my own evernote, how do these programs store the notes?
I dont know how to directly tag the file, but you could create your own system to do it. I mentioned two ways to do it:
The first way is to format the note's / file's contents so that there are two parts, the tags and the actual text. When the program loads the note / file, it seperates the tags and the text. This has the downside that the program have to load the whole file to just find the tags.
The second way is to have a database with the filename and it's associated tags. In this way the program doesn't have to load the whole file just to find the tags.
The first way
In this solution you need to format your files in a specific way
<Tags>
tag1,tag2,tag3
</Tags>
<Text>
The text you
want in here
</Text>
By setting up the file like this, the program can separate the tags from the text. To load it's tags you'd need this code:
public List<string> GetTags(string filePath)
{
string fileContents;
// read the file if it exists
if (File.Exists(filePath))
fileContents = File.ReadAllText(filePath);
else
return null;
// Find the place where "</Tags>" is located
int tagEnd = fileContents.IndexOf("</Tags>");
// Get the tags
string tagString = fileContents.Substring(6, tagEnd - 6).Replace(Environment.NewLine, ""); // 6 comes from the length of "<Tags>"
return tagString.Split(',').ToList();
}
Then to get the text you'd need this:
public string GetText(string filePath)
{
string fileContents;
// read the file if it exists
if (File.Exists(filePath))
fileContents = File.ReadAllText(filePath);
else
return null;
// Find the place where the text content begins
int textStart = fileContents.IndexOf("<Text>") + 6 + Environment.NewLine.Length; // The length on newLine is neccecary because the line shift after "<Text>" shall NOT be included in the text content
// Find the place where the text content ends
int textEnd = fileContents.LastIndexOf("</Text>");
return fileContents.Substring(textStart, textEnd - textStart - Environment.NewLine.Length); // The length again to NOT include a line shift added earlier by code
}
Then I'll let you find out how you do the rest.
The second way
In this solution you have a database file over all your files and their associated tags. This database file would look like this:
[filename]:[tags]
file.txt:tag1, tag2, tag3
file2.txt:tag4, tag5, tag6
The program will then read the file name and the tags in this way:
public static void LoadDatabase(string databasePath)
{
string[] fileContents;
// End process if database doesn't exist
if (File.Exists(databasePath))
return;
fileContents = File.ReadAllLines(databasePath); // Read all lines seperately and put them into an array
foreach (string str in fileContents)
{
string fileName = str.Split(':')[0]; // Get the filename
string tags = str.Split(':')[1]; // Get the tags
// Do what you must with the information
}
}
I hope this helps.