I'm wondering if it is possible to search and read from a file and display what's in the file in a message box.
I'm wanting to search for a file by its ID, which ID is known by the user. When the user enters the ID my program opens the file which shares the same ID; eg.ID.txt in the preset folder.
when it's selected it is then read and put in a MessageBox which will then display what is in the file.
Can anyone show me how to do this?
Thanks.
//Declare variables
int TID;
private void TIDFileCreate_Click(object sender, EventArgs e)
{
StreamWriter outputFile;
outputFile = File.CreateText (TID.ToString()+".txt");
outputFile.WriteLine("Investor :" +" " + InvestorNameLabel.Text);
outputFile.WriteLine("Initial Amount" + " " +AmountLabel.Text);
outputFile.WriteLine("Date Invested" +" " +DateLabel.Text);
outputFile.WriteLine("Period Chosen" + " "+DaysInvestedLabel.Text);
outputFile.WriteLine("Rate Chosen" + " " + RateLabel.Text);
outputFile.WriteLine("Total Interest" + " " +InterestAmountLabel.Text);
outputFile.WriteLine("Transaction Number :" + " " + TransactionIDLabel.Text);
outputFile.Close();
MessageBox.Show("Transaction file for Transaction: " + TransactionIDLabel.Text + "Was Created", "Transaction File");
}
private void SearchButton_Click(object sender, EventArgs e)
{
SearchID = int.Parse(searchTextBox.Text);
string[] lines = File.ReadAllLines(#"C:\Users\Public\TestFolder\"+SearchID+".txt");
}
Can't you just use MessageBox.Show() in your SearchButton_Click method?
private void SearchButton_Click(object sender, EventArgs e)
{
SearchID = int.Parse(searchTextBox.Text);
string[] lines = File.ReadAllLines(#"C:\Users\Public\TestFolder\"+SearchID+".txt");
System.Windows.Forms.MessageBox.Show(string.Join("\r\n", lines));
}
I think that for what you want to do you should read this:
http://msdn.microsoft.com/en-us/library/ms233843.aspx
or some similar article about serialization.
This said, if the number of IDs grow in number, you should considering the adoption of a lightweight DB, i.e. SQLite, just to name one.
Take a look at the DirectoryInfo class. Something like the following should do what you want;
DirecectoryInfo dir = new DirectoryInfo(pathToRoot);
FileInfo[] files = dir.GetFiles("Id.txt"); //if using a specific name should return 1 item
TextBox.Text = File.ReadAllText(files.FirstOrDefault().FullName);
Keep in mind I have no error handling or anything here. You'll have to add that yourself, this just shows you the key classes/methods to get the files and read their contents. There are many other options like doing GetFiles(), keeping that collection in memory and then operating on them later on.
Related
Sorry for the bad title, i didn't know how to explain it better. I just started in Csharp so its probably a dumb mistake.
private void timer1_Tick(object sender, EventArgs e)
{
label1.Text = "CPU Usage" + " " + (int)cpuCounter.NextValue() + "%";
string[] usageCPUay = { label1.Text };
System.IO.File.WriteAllLines(#"C:\Users\Filip\Desktop\CPUOutput.txt", usageCPUay);
}
So this is the code I have issues with and can't understand how to fix it. I tried with streamwriter but I got the same issues. I want to make the output the cpuCounter gives to store in a txt file. But every time it just writes the latest CPU Usage and not every one. Like this wrong output. I want it to type all the cpu usages it got and store them like that but every new one in a separate line.
Let's analyze your code:
you have a method, in the body you have label1.text which is text I assume, a string.
then you have got an array of strings, but this array contains only a single element, which is label1.text, then you write in the text file the array, which contains only a single element.
3 errors I see:
1.- the array contains a single element, therefore you are only storing a single line.
2.- at the end of the string that you are meant to record in the text file you should add "\n" for a new line.
3.- I understand from https://learn.microsoft.com/en-us/dotnet/api/system.io.file.writealllines?view=netcore-3.1#System_IO_File_WriteAllLines_System_String_System_String___ that it creates the file as new, therefore you may be deleting what you already have.
Solution:
Like in the example that was presented to you in the link, I would do the following:
label1.Text = "CPU Usage" + " " + (int)cpuCounter.NextValue() + "%\n";
string[] usageCPUay = { label1.Text };
if (!File.Exists(path))
{
// Create a file to write to.
File.WriteAllLines(path, usageCPUay);
}
else{
File.AppendAllText(path, usageCPUay);}
So, I am running SSIS (through VS) and I have two segments that hang me up when my clients don't send in the exact files every day. I have a task that deletes old files, and then renames the current files to the filename with _OLD at the end of it.
The issue is: If the files that are in there aren't the exact same, it crashes, failing the entire thing.
An example:
A client sends in on Monday files: Names, Addresses, Grades, Schools
The same client, on Tuesday sends in: Names, Addresses, Schools
Since the Grades file doesn't exist, it still gets renamed to Grades_OLD but the SSIS fails.
The scripts are:
del Names_OLD.csv
bye
This will then go to the Rename Script:
ren Names.csv Names_OLD.csv
bye
and will then go on to Addresses, to do the same thing. It is super frustrating that these fail when a single file doesn't exist the next day, and there doesn't seem to be a need for it.
We have two scripts that generate the archive data to process:
public void Main()
{
Dts.Variables["ARCHIVEFILE"].Value = Path.GetFileNameWithoutExtension(Dts.Variables["FTPFILE"].Value.ToString()) + "_OLD" + Path.GetExtension(Dts.Variables["FTPFILE"].Value.ToString());
Dts.TaskResult = (int)ScriptResults.Success;
}
and
public void Main()
{
/*PSFTP_DEL_script.txt
del %1
bye
PSFTP_REN_script.txt
ren %1 %2
bye
*/
var lineOut = String.Empty;
var File1 = Dts.Variables["User::FTPWORKINGDIR"].Value.ToString() + "\\SSIS_PSFTP_DEL_script.txt";
var File2 = Dts.Variables["User::FTPWORKINGDIR"].Value.ToString() + "\\SSIS_PSFTP_REN_script.txt";
lineOut = "del " + Dts.Variables["User::ARCHIVEFILE"].Value.ToString() + Environment.NewLine + "bye";
System.IO.File.WriteAllText(File1, lineOut);
lineOut = "ren " + Dts.Variables["User::FTPFILE"].Value.ToString() + " " + Dts.Variables["User::ARCHIVEFILE"].Value.ToString() + Environment.NewLine + "bye";
System.IO.File.WriteAllText(File2, lineOut);
Dts.TaskResult = (int)ScriptResults.Success;
}
Researching it doesn't really give anything helpful, and kind of just leads me back to where I am right now.
Try using a foreach loop on files for each file that can be processed and put all the processing of the file inside it. And do not put any precendence constraints between the foreach loops.
This will process the files that are there an not fail when the others aren't there.
The foreach loop essentially works as a check if the file exists.
This assumes you do not need all the files to properly process them.
Why not checking if the file exists before writing the script:
if (System.IO.File.Exists(Dts.Variables["User::ARCHIVEFILE"].Value.ToString())){
lineOut = "del " + Dts.Variables["User::ARCHIVEFILE"].Value.ToString() + Environment.NewLine + "bye";
System.IO.File.WriteAllText(File1, lineOut);
}
if (Dts.Variables["User::FTPFILE"].Value.ToString())){
lineOut = "ren " + Dts.Variables["User::FTPFILE"].Value.ToString() + " " + Dts.Variables["User::ARCHIVEFILE"].Value.ToString() + Environment.NewLine + "bye";
System.IO.File.WriteAllText(File2, lineOut);
}
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I have a minor project that i've been working on for a while for an Independent study class. I am supposed to import around a 140,000 data points for a IDW based math analysis, currently it takes the program around 10~14 minutes to import all my points.
What I'm doing is reading off of a .txt file, splitting based on new line, and then splitting future based on spaces betweeen the fields. Then turning them into Datapt objects i designed for easy OOD style manipulation.
All i want to know is that I'll probably have to do a live demo with the program and i don't want people to have to sit there for 14 minutes while it preloads, if push comes to shove i could find a laptop from a friend (My main comp is a dekstop) and preload it on there before my presentation but the whole issue is making me wonder why is it taking so long to load only 100k datapts? I'd figure it would take a shorter amount of time? If there a quicker way than anyone knows of, it would be greatly appreciated if you could share it!
private void openPointsToolStripMenuItem_Click(object sender, EventArgs e)
{
openFileDialog1.Filter = "Text files|*.txt|All files|*.*";
openFileDialog1.Title = "Open the Captured Packets";
openFileDialog1.ShowDialog();
//Check to see if a filename was given
if (openFileDialog1.FileName != "")
{
readOut = System.IO.File.ReadAllText(openFileDialog1.FileName);
//textBox1.Text = System.IO.File.ReadAllText(openFileDialog1.FileName);
dataChain = readOut.Split(new String[] { "\r\n", "\n" }, StringSplitOptions.None);
//Read out Code
string[] link; //dataChain[0].Split(null);
for(int i = 0; i < 100000; i++)
{
link = dataChain[i].Split(null);
textBox1.AppendText(link[0] + " " + link[1] + " " + link[2] + " "+ link[3] + "\r\n");
dataPt Temp = new dataPt(Convert.ToDouble(link[0]), Convert.ToDouble(link[1]), Convert.ToDouble(link[2]), Convert.ToDouble(link[3]));
dataList.Add(Temp);
ptDisplay.Items.Add(Temp.ToString());
}
}
}
One improvement that comes to mind is that you don't need to load the whole file in memory. You can process it line by line using the ReadLines method which returns an Enumerable<string> on which you can further filter down the results using the Take extension method:
private void openPointsToolStripMenuItem_Click(object sender, EventArgs e)
{
openFileDialog1.Filter = "Text files|*.txt|All files|*.*";
openFileDialog1.Title = "Open the Captured Packets";
openFileDialog1.ShowDialog();
if (openFileDialog1.FileName != "")
{
foreach (string line in System.IO.File.ReadLines(openFileDialog1.FileName).Take(100000))
{
var link = line.Split(null);
textBox1.AppendText(link[0] + " " + link[1] + " " + link[2] + " "+ link[3] + "\r\n");
dataPt Temp = new dataPt(Convert.ToDouble(link[0]), Convert.ToDouble(link[1]), Convert.ToDouble(link[2]), Convert.ToDouble(link[3]));
dataList.Add(Temp);
ptDisplay.Items.Add(Temp.ToString());
}
}
}
Do not load the text all in memory at once. Instead use the File.ReadLines in your inner loop to enumerate the lines and process them one by one, but it is also very important to not change the TextBox.Text at each line. This is very expensive both in terms of execution and in terms of memory footprint. (Strings are immutable, so at each loop a new string is allocated in memory and the previous one is discarder wreaking havoc with memory fragmentation)
StringBuilder sb = new StringBuilder();
foreach(string line in File.ReadLines(openFileDialog1.FileName))
{
link = line.Split();
sb.AppendLine(link[0] + " " + link[1] + " " + link[2] + " "+ link[3]);
dataPt Temp = new dataPt(Convert.ToDouble(link[0]), Convert.ToDouble(link[1]), Convert.ToDouble(link[2]), Convert.ToDouble(link[3]));
dataList.Add(Temp);
ptDisplay.Items.Add(Temp.ToString());
}
textBox1.AppendText(sb.ToString());
Instead add every line to a StringBuilder class that handles a lot better the string concatenated together than a TextBox.Text property. Then when exiting the loop, change the TextBox.Text just one time.
So I am currently trying to do this question for tafe but am having trouble getting it to add text to the file after the first time.
"Create an application that at start up asks the user to choose an output file using a Save File Dialog Window. The application to have a “Write to File” button that when clicked will take a name and age that the user has entered into two text boxes and write them directly to the file. The user can repeat the button click action as often as they wish."
This is my current code for it:
private void Form4_Load(object sender, EventArgs e)
{
saveFileDialog1.Title = ("Choose Save Location");
saveFileDialog1.ShowDialog();
}
private void btnSendToFile_Click(object sender, EventArgs e)
{
string strName = txtName.Text;
string strAge = txtAge.Text;
string strTitles = ("Name \t\t Age");
string strCombined = strTitles + "\n" + (strName + "\t\t" + strAge);
System.IO.StreamWriter OutFile;
MessageBox.Show("The Name and Age of the Person Entered Will be Written to a File");
OutFile = System.IO.File.CreateText(saveFileDialog1.FileName);
OutFile.WriteLine(strCombined);
OutFile.Close();
MessageBox.Show("The Details Have Been Written to File" + saveFileDialog1.FileName);
StreamWriter AddFile = File.AppendText(saveFileDialog1.FileName);
AddFile.Write(strCombined);
}
I'm not sure if I should be doing a loop or not and this is the form itself, https://gyazo.com/e2c4170d46295d6f92a35026e1f2304b
Any help is appreciated, Thanks in advance
For what you're doing you absolutely don't need to work with streams or anything that low level (you don't need to call the create methods on files and use a stream returned by it). You can directly use the methods that write or append to the file and handle all of this for you.
For example using AppendAllText will do everything for you (managing the streams, flushing and closing them, appending at the end, creating the file if it doesn't exist etc etc).
so you can replace all of this code :
System.IO.StreamWriter OutFile;
MessageBox.Show("The Name and Age of the Person Entered Will be Written to a File");
OutFile = System.IO.File.CreateText(saveFileDialog1.FileName);
OutFile.WriteLine(strCombined);
OutFile.Close();
MessageBox.Show("The Details Have Been Written to File" + saveFileDialog1.FileName);
with
File.AppendAllText(saveFileDialog1.FileName, strCombined);
I have no idea what you're doing in the code that follows it (calling appendtext, i assume you're thinking you need to append after creating?) in any case you don't need it. So if you just want to append all the text of "strcombined" at the end of the file each time you click the whole function should look like :
private void btnSendToFile_Click(object sender, EventArgs e)
{
string strName = txtName.Text;
string strAge = txtAge.Text;
string strTitles = ("Name \t\t Age");
string strCombined = strTitles + "\n" + (strName + "\t\t" + strAge);
MessageBox.Show("The Name and Age of the Person Entered Will be Written to a File");
File.AppendAllText(saveFileDialog1.FileName, strCombined);
MessageBox.Show("The Details Have Been Written to File" + saveFileDialog1.FileName);
}
Also as a side comment i would rewrite all of it as such for readability, these are suggestions and not hard rules:
1) Removed hungarian notation (Don't add a prefix to your variable to indicate it's type, it's generally frowned upon)
2) Removed a lot of the temporary variables that aren't really needed (used once in the same local function)
This makes for a much smaller and very readable function:
private void btnSendToFile_Click(object sender, EventArgs e)
{
MessageBox.Show("The Name and Age of the Person Entered Will be Written to a File");
File.AppendAllText(saveFileDialog1.FileName,"Name \t\t Age"+ "\n" + txtName.Text + "\t\t" + txtAge.Text);
MessageBox.Show("The Details Have Been Written to File" + saveFileDialog1.FileName);
}
I've written an application, a component of which watches for Events being raised in the Windows Application Log with a certain Source and EventID in order to parse data from them. However, it appears to miss some of these events for no readily apparent reason.
I have included debug messages to try to see where the issue is - this takes the form of comments sent to a text field.
When an Entry is written to the application log, a time-stamped message is added to the debug text field, and parseApplicationLogEntry() is called.
private void eventLogApplication_EntryWritten(object sender,
System.Diagnostics.EntryWrittenEventArgs e)
{
txtDebug.Text = txtDebug.Text + "\n " + DateTime.Now.ToLongTimeString() +
+ ": Application Log has been written.";
parseApplicationLogEntry();
}
The application log entry is parsed, and the Source and EventID are looked at to determine if they are what we are looking for. A time-stamped message is added to the debug text showing the Source and EventID found.
private void parseApplicationLogEntry()
{
System.Diagnostics.EventLog log = new System.Diagnostics.EventLog("Application");
int entry = log.Entries.Count - 1;
string logMessage = log.Entries[entry].Message;
string logSource = log.Entries[entry].Source;
string logEventID = log.Entries[entry].InstanceId.ToString();
log.Close();
txtDebug.Text = txtDebug.Text + "\n " + DateTime.Now.ToLongTimeString() +
": Application Log Source is " + logSource;
txtDebug.Text = txtDebug.Text + "\n " + DateTime.Now.ToLongTimeString() +
": Application Log EventID is " + logEventID;
if (logSource == "ExpectedSource" & logEventID == "ExpectedEventID")
{
// Do stuff
}
}
The behaviour is as expected much of the time, however sometimes there is very odd behaviour.
For example, 13 logs were written to the application log. 3 with the looked-for source, and 10 with another source. The debug text shows 13 entries were seen, all with the unfamiliar source...
I'm not sure where to go from here.
There is no need to access the EventLog in this way to review the newest entries.
Instead of calling a method to iterate through the EventLog each time a new Entry is written, it is simpler (and safer) to access the Entry more directly using the event handler which triggers each time an Entry is written.
private void eventLog_Application_EntryWritten(object sender, EntryWrittenEventArgs e)
{
// Process e.Entry
}