I am trying to save file with text to specific location:
saveFileDialog.FileName = "Info_" +
System.DateTime.Now.ToString("yyyyMMddhmmss" + ".txt");
string Info = "";
TextFormat(ref Info);
File.WriteAllText(Path.Combine(dir.ToString(),saveFileDialog.FileName), Info);
so right now when I am pressing the button if gives me
filename: Info_2013030114511.PxP (note ".PxP" instead of ".txt"),
but if I will change to:
saveFileDialog.FileName = "Info_" +
System.DateTime.Now.ToString("yyyyMMddhmmss" + ".TXT");
gives me correct result: Info_2013030114511.TXT
I am wondering if it's a bug or am I doing something wrong...
You are supplying "yyyyMMddhmmss.txt" to the DateTime format function. It is interpreting the 't' as the a.m./p.m. specifier. What you mean to do is:
saveFileDialog.FileName = "Info_" +
System.DateTime.Now.ToString("yyyyMMddhmmss") + ".txt";
Related
I'm trying to format content of my file like this:
0126252019-05-06 14:47:06 1098500020
But everytime I'm getting this results:
01262524. 5. 2019. 14:47:08 1098500020
Obliviously date and time are not formated as I wanted.
Here is my code:
StreamWriter file = new System.IO.StreamWriter("C:\\MyMainFolder\\MyFilesFolder\\" + 15050 + ".flr");
file.WriteLine(12625.ToString("D6") + string.Format("{0:yyyy-MM-dd HH:mm:ss}", DateTime.Now + " " + 1098500020));
file.Close();
I've tried to format DateTime.Now as I wrote
string.Format("{0:yyyy-MM-dd HH:mm:ss}"
But looks like its not working
Thanks guys
Cheers!
You are passing DateTime.Now + " " + 1098500020 to string.Format which isn't going to be parsed by that format string you have specified. To fix that you should move the ).
However, you should create the entire string, including the prefix, with string.Format, or for clearer code use string interpolation, for example:
var someInteger = 12625;
var line = $"{someInteger:D6}{DateTime.Now:yyyy-MM-dd HH:mm:ss} 1098500020";
The problem is that + is applied as string concatenation in the expression below:
string.Format("{0:yyyy-MM-dd HH:mm:ss}", DateTime.Now + " " + 1098500020);
// ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// C# makes this one string, and passes it for formatting.
Moving the concatenation that you plan to do inside the format string will fix the problem:
string.Format("{0:yyyy-MM-dd HH:mm:ss} 1098500020", DateTime.Now);
public void CreateCertificate()
{
File.Create($"
{#"C:\Users\Director\Documents\TestCertApp\TestSub\" + thisYear +
" Certificates- " + certType + "\""}{myFileName}.ppt", 1 ,
FileOptions.None);
}
So I need the backslash between certype and filename to show it belongs within the folder and not next to. It says its an illegal character but how would I get the file in the folder without it?
Based on the code that you wrote the file path that will be generated is (based on my own substitutions for the variables):
String thisYear = "2019";
String certType = "UnderGrad";
String myFileName = "myfile";
String fileToCreate = $"{#"C:\Users\Director\Documents\TestCertApp\TestSub\" + thisYear + " Certificates- " + certType + "\""}{myFileName}.ppt";
Debug.Print(fileToCreate);
Will give you this output:
C:\Users\Director\Documents\TestCertApp\TestSub\2019 Certificates- UnderGrad"myfile.ppt
If you notice there is a " before the filename part of myfile.ppt - This is where the Illegal Character comes from.
If you use this code fragment to generate the path:
String basePath = #"C:\Users\Director\Documents\TestCertApp\TestSub\";
String certificateFolder = $"{thisYear} Certificates- {certType}";
String correctFilePath = Path.Combine(basePath, certificateFolder, $"{myFileName}.ppt");
Debug.Print(correctFilePath);
This will result in the output of:
C:\Users\Director\Documents\TestCertApp\TestSub\2019 Certificates- UnderGrad\myfile.ppt
This version has a \ where the previous code had a " and is no longer illegal, but conforms to the requirement that you wrote the files being in the folder.
Something else to note:
You may want to use Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments); to get the path to the MyDocuments folder of the user.
Well, the short answer is that you cannot use an illegal character in a path or file name. Otherwise it wouldn't be illegal. :)
But it seems that the problem here is that you though you were adding a backslash (\) character, when really you were adding a double quote (") character. So if everything else is ok, you can just replace "\"" with "\\" and it should work.
Part of the problem is also that you're doing some strange combination of string interpolation, and it makes the code really hard to read.
Instead you can use just string interpolation to simplify your string (I had to use concatenation below to prevent horizontal scrolling, but you could remove it):
string filePath = $#"C:\Users\Director\Documents\TestCertApp\TestSub\{thisYear} " +
$#"Certificates- {certType}\{myFileName}.ppt";
But even better would be to use the Path.Combine method, along with some variables, to make the intent very clear:
var rootDir = #"C:\Users\Director\Documents\TestCertApp\TestSub"
var fileDir = $"{thisYear} Certificates- {certType}"
var fileName = "{myFileName}.ppt";
var filePath = Path.Combine(rootDir, fileDir, fileName);
I am trying to save a number of images and I'd like to use the DateTime to have distinct and identifiable Filenames.
So I create a String with the correct Path, add the datetime to it and remove the spaces, dots and colons.
String imagePath = "D:\\Patienten\\" + username;
imagePath += "\\"+DateTime.Now.ToString();
Console.WriteLine("WithFilename: " + imagePath);
imagePath.Replace(" ", "");
Console.WriteLine("Without \" \" : " + imagePath);
imagePath.Replace(".", "");
Console.WriteLine("Without \".\": " + imagePath);
imagePath.Replace(":", "");
Console.WriteLine("Output format: " + imagePath);
imagePath += ".png";
image.Save(imagePath);
According to the console output the String doesnt change at all.
Meaning all the Output Strings from Console.Writeline are identical.
I am using c# in visual Studio Express 2010 in case that makes a difference.
Can anyone find an Error here?
Thanks in advance!
Strings are immutable, the modified string will be a new string that is returned from the function
e.g.
imagePath = imagePath.Replace(" ", "");
Why strings are immutable
Why not just use DateTime.ToString() with a format and drop the dividers using that? Would be more efficient than performing several String.Replace() yourself:
string imagePath = "D:\\Patienten\\" + username + "\\" + DateTime.Now.ToString("yyyyMMdd hhmmssfff") + ".png";
You should use:
imagePath = imagePath.Replace(" ", ""); You should assign returned value
From the documentation (emphasis mine):
Returns a new string in which all occurrences of a specified string in the current instance are replaced with another specified string.
It is supposed to work like that. Use
imagePath = imagePath.Replace(" ", "");
instead.
I've made it possible to save a file from my winform using the Vlcdotnet framework. At the moment this code is as follows:
_tempVLCWindow.TakeSnapshot("C:\\ScreenCap.jpg", 1280, 720);
Now, instead of "ScreenCap" being the file (which only allows me to save one single image) I want it to store the current date & time so I can save multiple snapshots. How is this possible?
you can do following:
String fileName = "C:\\ScreenCap_" + DateTime.Now.ToString("yyyyMMdd_hhmmss") + ".jpg";
_tempVLCWindow.TakeSnapshot(fileName , 1280, 720);
This will create you a filename like: C:\ScreenCap_20130307_1023.jpg
By calling ToString() and specifying the format as YearMonthDay_HourMinutesSeconds (yyyyMMdd_hhmmss) you will be able to create a string with the date and time that will be accepted as a file name. If you did call only .ToString() you will get an illegal characters in path exception.
For formatting options in date.tostring("") look at: msdn
If I did not get you wrong you may try this:
string filename = DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString()+DateTime.Now.Millisecond.ToString();
_tempVLCWindow.TakeSnapshot(String.Format("C:\\{0}.jpg", filename), 1280, 720);
string filename = DateTime.Today.ToString() + ".csv";
if(!File.Exists(filename))
File.Create(filename);
I thought this would work but it throws a 'format not supported' error. I just want a csv to be created in the directory alongside my .exe
I think the problem is that converting a DateTime to a string will generate a string with invalid filename characters, such as colons (:) and that will cause the create to fail.
You may want to use a format string to control the generated filename. e.g.
string filename = DateTime.Today.ToString("yyyy-MM-dd") + ".csv";
This is because DateTime.Today.ToString() contains slashes, which are not valid as part of a windows filename.
You can, however, do this: DateTime.Now.ToString("yyyyMMdd")
I'm guessing your locale has / / : (or similar confusing characters) in the date format. You should specify an explicit format - "yyyy MM dd" for example:
string filename = DateTime.Today.ToString("yyyy MM dd",
CultureInfo.InvariantCulture) + ".csv";
As everybody has pointed out, the default DateTime.ToString() formatting has invalid characters in it (for just about any region settings), so that
string filename = DateTime.Now.ToString() + ".csv";
generates a 'filename' like 2/18/2011 4:26:48 PM.csv -- which is invalid
if you want a date-time based name, try
string filename = DateTime.Now.ToString("yyyyMMddhhmmss") + ".csv";
to get something like 2011021804254.csv
you can add more formatting, just as long as it doesn't contain any of the following: \ / : * ? " < > |
Your date has slashes in it, try this instead
string filename = Datetime.Now.Ticks.ToString() + ".csv";