I was trying to export my C# list to Csv file. All is set well. But the thing is field seperator is not working properly. its showing like, my string with " at the end (eg: 0000324df"). Here is my Controller code.
IEnumerable stockexpo = stockexp; // Assign value
MemoryStream output = new MemoryStream();
StreamWriter writer = new StreamWriter(output, Encoding.UTF8);
writer.Write("ItemNo,");
writer.Write("Repeat Count");
writer.WriteLine();
foreach (StockResult order in stockexpo)
{
writer.Write(String.Format("{0:d}", order.ItemNumber));
writer.Write("\"");
writer.Write(",");
writer.Write("\"");
writer.Write(order.Count);
writer.Write("\"");
writer.Write(",");
writer.WriteLine();
}
writer.Flush();
output.Position = 0;
return File(output, "text/comma-separated-values", "stockexp.csv");
I need to know how i can seperate the field values appropriately. Anyone can help me for this.
writer.Write("\"");
This line of code will be outputting a " every time. Why have it at all?
Also, I wouldn't have a comma before the WriteLine, since there is no need to delimit the end of the file.
IEnumerable stockexpo = stockexp; // Assign value
MemoryStream output = new MemoryStream();
StreamWriter writer = new StreamWriter(output, Encoding.UTF8);
writer.Write("ItemNo,");
writer.Write("Repeat Count");
writer.WriteLine();
foreach (StockResult order in stockexpo)
{
writer.Write(order.ItemNumber);
writer.Write(",");
writer.Write(order.Count);
writer.WriteLine();
}
writer.Flush();
output.Position = 0;
return File(output, "text/comma-separated-values", "stockexp.csv");
Related
I search in google, stackoverflow but did not get easy answer. Is there any way to convert a linq list to byte array?
public FileResult GetCustomerListCSV()
{
List<Customer> CustomerList = new List<Customer>();
CustomerList = dbContext.Customer.ToList(); // Need to convert this into byte array
return File(CustomerList, "text/csv", "CustomerList.csv");
}
Please help.
You have to create a CSV string first, then convert it to bytes:
var lines = CustomerList.Select(c => $"{c.Id}, {c.Name}");
var csv = string.Join(Environment.NewLine, lines);
var bytes = Encoding.UTF8.GetBytes(csv);
return File(bytes, "text/csv", "CustomerList.csv");
Alternatively, using CsvHelper library:
using var ms = new MemoryStream();
using var writer = new StreamWriter(ms);
using var csv = new CsvWriter(writer, CultureInfo.InvariantCulture);
csv.WriteRecords(CustomerList);
csv.Flush();
ms.Seek(0, SeekOrigin.Begin);
return File(ms, "text/csv", "CustomerList.csv");
I am saving my records using this code:
string path = Android.OS.Environment.ExternalStorageDirectory.AbsolutePath;
public string fileName { get; set; }
fileName = Path.Combine(path, "sample.wav");
if (!recorder.IsRecording)
{
recorder.StopRecordingOnSilence = TimeoutSwitch.IsToggled;
//Start recording
var audioRecordTask = await recorder.StartRecording();
BtnDoneRec.IsEnabled = false;
await audioRecordTask;
RecEditor.IsEnabled = true;
BtnDoneRec.IsEnabled = false;
PlayButton.IsEnabled = true;
var filePath = recorder.GetAudioFilePath();
if (filePath != null)
{
var stream = recorder.GetAudioFileStream();
using (var fileStream = new FileStream(fileName, FileMode.Create, FileAccess.Write))
{
stream.CopyTo(fileStream);
}
}
}
else
{
//stop recording ...
await recorder.StopRecording();
}
I want my record to have a specific name which is labeled with my RecEditor
using (var streamReader = new StreamReader(fileName))
{
File.Move("sample.wav", RecEditor.Text + ".wav");
}
So it will rename "sample.wav" to "RecEditor text.wav" every time I click my save button.
But when I click save, it gives me this record
System.IO.FileNotFoundException: 'Could not find file '/sample.wav'.'
The record is stored in /storage/emulated/0/sample.wav
The sample.wav is created in my device but I don't know why it give me 'Could not find file '/sample.wav'.' error. What am i doing wrong here?
I believe that what you're looking is something like this:
if(File.Exists(fileName))
{
var newFileName = Path.Combine(path, $"{RecEditor.Text}.wav");
File.Move(fileName, newFileName);
}
You don't need to open a new Stream as you are doing. Also, you need to put the full file path not only the file name.
You might want to validate that RecEditor.Text is not empty before using its value for the newfileName
Hope this helps.-
I've verified using System.Text.Encoding.ASCII.GetString(ms.ToArray)); that my memorystream has the expected data.
However using the LinqToCSV nuget library will not generate my csv file. I get no errors or exceptions thrown. I just get an empty file when I'm prompted to open the file.
Here is my Action Method
public FileStreamResult Export(){
var results = _service.GetProperties().Take(3);
System.IO.MemoryStream ms = new System.IO.MemoryStream();
System.IO.TextWriter txt = new System.IO.StreamWriter(ms);
CsvFileDescription inputFileDescription = new CsvFileDescription{
SeparatorChar =',',
FirstLineHasColumnNames = true
}
;
CsvContext csv = new CsvContext();
csv.Write(results,txt,inputFileDescription);
return File(ms , "application/x-excel");
}
I find it interesting, if I change the return type to contentResult, and the return method to Content() and pass it System.Text.Encoding.ASCII.GetString(ms.ToArray)); I do get a browser window showing my data.
Make sure you reset stream position to 0. Also make sure you flush your StreamWriter before that.
Calling the Web API method to return CVS file from JavaScript.
public HttpResponseMessage Bidreport([FromBody]int formData).....
Fill in your IEnumerable<YourObject>query = from LINQ query
....
This is how to return it:
using (var ms = new MemoryStream())
{
using (TextWriter txt = new StreamWriter(ms))
{
var cc = new CsvContext();
cc.Write(query, txt, outputFileDescription);
txt.Flush();
ms.Position = 0;
var fileData = Encoding.ASCII.GetString(ms.ToArray());
var result = new HttpResponseMessage(HttpStatusCode.OK) {Content = new StringContent(fileData)};
result.Content.Headers.ContentType = new MediaTypeHeaderValue("application/x-excel");
return result;
}
}
How do i replace a variable defined in a file (a.xml) after the file is read into Jmeter ?
eg. a.xml has a content.
<Shipment Action="MODIFY" OrderNo="${vOrderNo}" >
The entire file is read into a string using
str_Input=${__FileToString(/a.xml)}
In the Jmx file, a http Request is made to get output from a webservice as
Using Xpath Extractor the value of OrderNo is read into a Variable vOrderNo.
Now, wanted to use the value of variable vOrderNo in the str_Input.. ? How do i ?
You can easily achieve this using beanshell (~java) code from any jmeter's sampler which allows beanshell code execution - BeanShell Sampler e.g..
The following works:
import java.io.*;
try
{
// reading file into buffer
StringBuilder data = new StringBuilder();
BufferedReader in = new BufferedReader(new FileReader("d:\\test.xml"));
char[] buf = new char[1024];
int numRead = 0;
while ((numRead = in.read(buf)) != -1) {
data.append(buf, 0, numRead);
}
in.close();
// replacing stub with actual value
String vOrderNo = vars.get("vOrderNo");
String temp = data.toString().replaceAll("\\$\\{vOrderNo\\}", vOrderNo);
// writing back into file
Writer out = new BufferedWriter(new FileWriter("d:\\test.xml"));
out.write(temp);
out.close();
}
catch (Exception ex) {
IsSuccess = false;
log.error(ex.getMessage());
System.err.println(ex.getMessage());
}
catch (Throwable thex) {
System.err.println(thex.getMessage());
}
This code doesn't require read file into string via ${__FileToString(...)}.
As well, you can combine both methods.
Ok, here is a simple code, that will explain what i need to do:
IsolatedStorageFile store = IsolatedStorageFile.GetUserStoreForApplication();
StreamWriter writeFile;
if (!store.DirectoryExists("SaveFolder"))
{
store.CreateDirectory("SaveFolder");
writeFile = new StreamWriter(new IsolatedStorageFileStream("SaveFolder\\SavedFile.txt", FileMode.CreateNew, store));
}
else
{
writeFile = new StreamWriter(new IsolatedStorageFileStream("SaveFolder\\SavedFile.txt", FileMode.Append, store));
}
StringWriter str = new StringWriter();
str.Write(urlHolder.Text);
writeFile.WriteLine(str.ToString());
writeFile.Close();
So, i have a isolatedstorage where i keep some links, that are read from some textbox(urlHolder), on the other side, i read those links and put them in listbox:
IsolatedStorageFile store = IsolatedStorageFile.GetUserStoreForApplication();
StreamReader readFile = null;
try
{
readFile = new StreamReader(new IsolatedStorageFileStream("SaveFolder\\SavedFile.txt", FileMode.Open, store));
string fileText = readFile.ReadToEnd();
bookmarkListBox.Items.Add(fileText);
readFile.Close();
}
catch
{
MessageBox.Show("Need to create directory and the file first.");
}
The thing with writing and reading is ok, but the problem is when that links are in listbox, when i want to select one of them it selects all of them...i tried everything, but no result, so, if anyone knows some solution, please write...Thanks!
You're reading the whole file as a single string and then adding it as a single item in the ListBox.
You need to add the lines/links as separate items. Try something like:
while (var item = readFile.ReadLine())
{
bookmarkListBox.Items.Add(item);
}