private void LoadCsvButton_Click(object sender, RoutedEventArgs e)
{
try
{
var dialog = new Microsoft.Win32.OpenFileDialog();
dialog.InitialDirectory = string.IsNullOrEmpty(CSVFile.Text) ?
"c:\\" : Path.GetDirectoryName(CSVFile.Text);
dialog.FileName = CSVFile.Text;
if (dialog.ShowDialog() != true)
{
return;
}
using (var fs = File.OpenRead(dialog.FileName))
using (var sr = new StreamReader(fs, Encoding.Default))
{
var csv = new CsvReaderService <Employee>(sr);
csv.Configuration.BlankRowsAreReturnedAsNull = true;
while (csv.CanRead())
{
Employee record = csv.GetRecord();
LogMessage(record.ToString());
}
}
}
catch (Exception ex)
{
LogError(ex);
}
}
private void CustomConverterLoadCsvButton_Click(object sender, RoutedEventArgs e)
{
try
{
var dialog = LoadFile(CustomConverterCSVFile.Text);
if (dialog.ShowDialog() != true)
{
return;
}
using (var fs = File.OpenRead(dialog.FileName))
using (var sr = new StreamReader(fs, Encoding.Default))
{
ICsvReaderService <Person> reader = new CsvReaderService <Person>(sr);
reader.Configuration.BlankRowsAreReturnedAsNull = true;
while (reader.CanRead())
{
Person record = reader.GetRecord();
if (record != null)
{
LogMessage(record.ToString());
}
}
}
}
catch (Exception ex)
{
LogError(ex);
}
}
public void GetRecord_BlankRowsAreReturnedAsNull_BlankRowsIgnored()
{
var tempFileName = Path.GetTempFileName();
try
{
using (var fs = File.Create(tempFileName))
using (var sw = new StreamWriter(fs))
{
sw.WriteLine("Name,Age");
sw.WriteLine("Fido,1");
sw.WriteLine(",");
sw.WriteLine("");
sw.WriteLine("Killer,2");
sw.WriteLine("Jaws,3");
sw.WriteLine(" ");
sw.WriteLine("Fluffy,4");
sw.WriteLine("John the dog,5");
sw.WriteLine(" ");
}
var result = new List <Dog>();
using (var fs = File.OpenRead(tempFileName))
using (var sr = new StreamReader(fs))
{
var reader = new CsvReaderService <Dog>(sr);
reader.Configuration.HasHeaderRow = true;
reader.Configuration.BlankRowsAreReturnedAsNull = true; // HERE IS WHAT WE ARE TESTING!!
while (reader.CanRead())
{
var data = reader.GetRecord();
if (data != null)
{
result.Add(data);
}
}
}
Assert.AreEqual(5, result.Count, "Expecting only 5 dogs!");
}
catch
{
File.Delete(tempFileName);
throw;
}
}
public void GetRecord_CanHandelClassWithOneProperty_DataRead(int expectedNumberOfRows, bool blankRowsAreReturnedAsNull)
{
var tempFileName = Path.GetTempFileName();
try
{
using (var fs = File.Create(tempFileName))
using (var sw = new StreamWriter(fs))
{
sw.WriteLine("Name");
sw.WriteLine("George");
sw.WriteLine("");
sw.WriteLine("Bob");
sw.WriteLine("Tom");
sw.WriteLine(" ");
sw.WriteLine("Ralph");
sw.WriteLine("James");
sw.WriteLine(" ");
}
var result = new List <ClassWithOneProperty>();
using (var fs = File.OpenRead(tempFileName))
using (var sr = new StreamReader(fs))
{
var reader = new CsvReaderService <ClassWithOneProperty>(sr);
reader.Configuration.HasHeaderRow = true;
reader.Configuration.BlankRowsAreReturnedAsNull = blankRowsAreReturnedAsNull;
while (reader.CanRead())
{
var data = reader.GetRecord();
if (data != null || blankRowsAreReturnedAsNull == false)
{
result.Add(data);
}
}
}
Assert.AreEqual(expectedNumberOfRows, result.Count, $"Expecting {expectedNumberOfRows} names!");
}
catch
{
File.Delete(tempFileName);
throw;
}
}
private static void ReadItems(string fileName)
{
using (var fs = File.OpenRead(fileName))
using (var sr = new StreamReader(fs))
{
ICsvReaderService <TestData> reader = new CsvReaderService <TestData>(sr);
reader.Configuration.HasHeaderRow = true;
reader.Configuration.BlankRowsAreReturnedAsNull = true;
while (reader.CanRead())
{
TestData item = reader.GetRecord();
if (item != null)
{
Console.WriteLine(item.FieldDescription);
}
}
}
}
public void CanReadAndWriteData()
{
string fileName = GetTestFileNameAndPath();
var dataList = new List <OddlyShapedData>();
using (var fs = File.OpenRead(fileName))
using (var sr = new StreamReader(fs, Encoding.Default))
{
var csv = new CsvReaderService <OddlyShapedData>(sr);
csv.Configuration.HasHeaderRow = true;
csv.Configuration.BlankRowsAreReturnedAsNull = true;
csv.Configuration.ThrowExceptionIfColumnCountChanges = false;
while (csv.CanRead())
{
dataList.Add(csv.GetRecord());
}
}
OddlyShapedData data1 = dataList.FirstOrDefault(w => w.FirstName == "David");
Assert.IsNotNull(data1, "Could not find record with David Jackson");
Assert.AreEqual("Jackson", data1.LastName);
Assert.AreEqual(45, data1.Age);
Assert.AreEqual(72, data1.HeightInInches);
OddlyShapedData data2 = dataList.FirstOrDefault(w => w.FirstName == "Heather");
Assert.IsNotNull(data2, "Could not find record with Heather Thomas");
Assert.AreEqual("Thomas", data2.LastName);
Assert.AreEqual(0, data2.Age);
Assert.AreEqual(0, data2.HeightInInches);
OddlyShapedData data3 = dataList.FirstOrDefault(w => w.FirstName == "Janet");
Assert.IsNotNull(data3, "Could not find record with Janet Reno");
Assert.AreEqual("Reno", data3.LastName);
Assert.AreEqual(65, data3.Age);
Assert.AreEqual(70, data3.HeightInInches);
}
private static List <Squirrel> ReadSquirrels(string squirrelFileName)
{
var result = new List <Squirrel>();
using (var fs = File.OpenRead(squirrelFileName))
using (var sr = new StreamReader(fs))
{
ICsvReaderService <Squirrel> reader = new CsvReaderService <Squirrel>(sr);
reader.Configuration.HasHeaderRow = true;
reader.Configuration.BlankRowsAreReturnedAsNull = true;
while (reader.CanRead())
{
Squirrel item = reader.GetRecord();
if (item != null)
{
result.Add(item);
}
}
}
return(result);
}
public void CanReadAndWriteData()
{
string fileName = GetTestFileNameAndPath();
var studentList = new List <Graduation>();
using (var fs = File.OpenRead(fileName))
using (var sr = new StreamReader(fs, Encoding.Default))
{
var csv = new CsvReaderService <Graduation>(sr);
csv.Configuration.HasHeaderRow = true;
csv.Configuration.BlankRowsAreReturnedAsNull = true;
while (csv.CanRead())
{
studentList.Add(csv.GetRecord());
}
}
// Create a temp file
string tempFileName = Path.Combine(
Path.GetDirectoryName(fileName),
Path.GetFileNameWithoutExtension(fileName) + "Temp.csv");
using (var fs = File.Create(tempFileName))
using (var sw = new StreamWriter(fs, Encoding.Default))
{
var service = new CsvWriterService <Graduation>(sw);
service.Configuration.HasHeaderRow = true;
foreach (var student in studentList)
{
service.WriteRecord(student);
}
}
Assert.IsTrue(FilesAreEqual(fileName, tempFileName));
}
private void LoadFileButton_Click(object sender, RoutedEventArgs e)
{
try
{
var dialog = LoadFile("c:\\temp\\Person.csv");
if (dialog.ShowDialog() != true)
{
return;
}
LogMessage("Before overriding");
using (var fs = File.OpenRead(dialog.FileName))
using (var sr = new StreamReader(fs))
{
ICsvReaderService <Person> reader = new CsvReaderService <Person>(sr);
while (reader.CanRead())
{
var person = reader.GetRecord();
LogMessage(person.ToString());
}
}
LogMessage("After overriding");
using (var fs = File.OpenRead(dialog.FileName))
using (var sr = new StreamReader(fs))
{
// Keep in mind that your replacement converter must be standalone.
// You cannot rely in any default converters.
// Default converters created when the service class is created.
ICsvReaderService <Person> reader = new CsvReaderService <Person>(sr);
// Replace a converter
reader.DefaultConverterFactory.ReplaceConverter(typeof(string), typeof(CsvConverterStringTextLengthEnforcer));
// Create all the column mappings.
reader.Init();
#region This converter has settings different that the defaults when it was constructed
// Well, you will have to find the columns with the converter that need changing
// We could just find string properties since it is the default, but that is problematic.
// What if a class property, which is a string, has a custom converter on it?
// So, let's just find the properties that are using our new default converter.
List <ColumnToPropertyMap> columnList = reader.FindColumnsByConverterType(typeof(CsvConverterStringTextLengthEnforcer));
foreach (ColumnToPropertyMap oneColumn in columnList)
{
if (oneColumn.ReadConverter is CsvConverterStringTextLengthEnforcer converter)
{
converter.MinimumLength = 5;
converter.MaximumLength = 6;
converter.CharacterToAddToShortStrings = '-';
}
}
#endregion
while (reader.CanRead())
{
var person = reader.GetRecord();
LogMessage(person.ToString());
}
}
}
catch (Exception ex)
{
LogError(ex);
}
}
