public void GetValue()
{
CsvDataReader reader = new CsvDataReader(@"..\..\SimpleCsv.txt");
reader.Read();
string v1 = reader.GetValue(0).ToString();
Assert.AreEqual("Row1A", v1);
Assert.AreEqual("Row1B", reader.GetValue(1).ToString());
reader.Dispose();
}
public void EmbeddedComma()
{
CsvDataReader reader = new CsvDataReader(@"..\..\SimpleCsv.txt");
reader.Read();
reader.Read();
Assert.AreEqual(reader.GetValue(0).ToString(), "Quotes");
string v1 = reader.GetValue(2).ToString();
string expected = "Q,A";
Assert.AreEqual(expected, v1);
reader.Dispose();
}
public void DbNullTest()
{
var s = new StringBuilder();
s.AppendLine(",null");
using (var reader = new StringReader(s.ToString()))
using (var csv = new CsvReader(reader, CultureInfo.InvariantCulture))
{
csv.Configuration.HasHeaderRecord = false;
csv.Configuration.TypeConverterOptionsCache.GetOptions <string>().NullValues.Add("null");
var dataReader = new CsvDataReader(csv);
Assert.AreEqual(string.Empty, dataReader.GetValue(0));
Assert.AreEqual(DBNull.Value, dataReader.GetValue(1));
var values = new object[2];
dataReader.GetValues(values);
Assert.AreEqual(string.Empty, values[0]);
Assert.AreEqual(DBNull.Value, values[1]);
}
}
public void GetValuesTest()
{
var s = new StringBuilder();
s.AppendLine("Boolean,Byte,Bytes,Char,Chars,DateTime,Decimal,Double,Float,Guid,Short,Int,Long,Null");
s.AppendLine("true,1,0x0102,a,ab,1/1/2019,1.23,4.56,7.89,eca0c8c6-9a2a-4e6c-8599-3561abda13f1,1,2,3,null");
using (var reader = new StringReader(s.ToString()))
using (var csv = new CsvReader(reader, CultureInfo.InvariantCulture))
{
csv.Configuration.Delimiter = ",";
csv.Configuration.TypeConverterOptionsCache.GetOptions <string>().NullValues.Add("null");
var dataReader = new CsvDataReader(csv);
dataReader.Read();
Assert.AreEqual(true, dataReader.GetBoolean(0));
Assert.AreEqual(1, dataReader.GetByte(1));
byte[] byteBuffer = new byte[2];
dataReader.GetBytes(2, 0, byteBuffer, 0, byteBuffer.Length);
Assert.AreEqual(0x1, byteBuffer[0]);
Assert.AreEqual(0x2, byteBuffer[1]);
Assert.AreEqual('a', dataReader.GetChar(3));
char[] charBuffer = new char[2];
dataReader.GetChars(4, 0, charBuffer, 0, charBuffer.Length);
Assert.AreEqual('a', charBuffer[0]);
Assert.AreEqual('b', charBuffer[1]);
Assert.IsNull(dataReader.GetData(0));
Assert.AreEqual(DateTime.Parse("1/1/2019"), dataReader.GetDateTime(5));
Assert.AreEqual(typeof(string).Name, dataReader.GetDataTypeName(0));
Assert.AreEqual(1.23m, dataReader.GetDecimal(6));
Assert.AreEqual(4.56d, dataReader.GetDouble(7));
Assert.AreEqual(typeof(string), dataReader.GetFieldType(0));
Assert.AreEqual(7.89f, dataReader.GetFloat(8));
Assert.AreEqual(Guid.Parse("eca0c8c6-9a2a-4e6c-8599-3561abda13f1"), dataReader.GetGuid(9));
Assert.AreEqual(1, dataReader.GetInt16(10));
Assert.AreEqual(2, dataReader.GetInt32(11));
Assert.AreEqual(3, dataReader.GetInt64(12));
Assert.AreEqual("Boolean", dataReader.GetName(0));
Assert.AreEqual(0, dataReader.GetOrdinal("Boolean"));
Assert.AreEqual("true", dataReader.GetString(0));
Assert.AreEqual("true", dataReader.GetValue(0));
var objectBuffer = new object[14];
dataReader.GetValues(objectBuffer);
Assert.AreEqual("true", objectBuffer[0]);
Assert.AreEqual(DBNull.Value, objectBuffer[13]);
Assert.IsTrue(dataReader.IsDBNull(13));
}
}
public void AddStaticValue()
{
Dictionary <String, String> staticColumns = new Dictionary <String, String>();
staticColumns.Add("Column1", "Value");
CsvDataReader reader = new CsvDataReader(@"..\..\SimpleCsv.txt", staticColumns);
Assert.AreEqual(3, reader.GetOrdinal("Column1"));
while (reader.Read())
{
Assert.AreEqual("Value", reader.GetValue(reader.GetOrdinal("Column1")));
}
reader.Close();
reader.Dispose();
}
public override DataTable ToDataTable(DataTableConvertParams context, Stream stream)
{
if (context == null)
{
context = new DataTableConvertParams();
}
StreamReader sr = new StreamReader(stream);
DataTable dt = new DataTable();
if (context.RecordDelim != '\n')
{
#region If Record Delimiter is overriden, itterate through all characters and replace them with new line
//https://stackoverflow.com/questions/1232443/writing-to-then-reading-from-a-memorystream
MemoryStream ms = new MemoryStream();
StreamWriter sw = new StreamWriter(ms);
while (sr.Peek() >= 0)
{
Char c = (Char)sr.Read();
if (c == context.RecordDelim)
{
sw.Write('\n');
}
else
{
sw.Write(c);
}
}
sw.Flush();
ms.Position = 0;
sr = new StreamReader(ms, Encoding.UTF8);
#endregion If Record Delimiter is overriden, itterate through all characters and replace them with new line
}
//_conf.BadDataFound = cxt =>
//{
//For debugging (put breakpoints here)
//};
_conf.Delimiter = context.FieldDelim.ToString();
if (_conf.Delimiter != ",")
{
_conf.IgnoreQuotes = true;
}
_conf.HasHeaderRecord = context.HasHeaders;
_conf.MissingFieldFound = null;
CsvReader csvReader = new CsvReader(sr, _conf);
CsvDataReader dataReader = new CsvDataReader(csvReader);
if (!context.HasHeaders)
{
#region If No Headers loop through all records and add columns as columns are found
while (dataReader.Read())
{
while (dt.Columns.Count < dataReader.FieldCount)
{
dt.Columns.Add($"Col{dt.Columns.Count}");
}
DataRow row = dt.NewRow();
for (int i = 0; i < dataReader.FieldCount; i++)
{
row[i] = dataReader.GetValue(i);
}
dt.Rows.Add(row);
}
dataReader.Close();
sr.Close();
#endregion If No Headers loop through all records and add columns as columns are found
}
else
{
#region If there are headers DataTable.Load will suffice
try
{
dt.Load(dataReader, LoadOption.Upsert);
}
catch (Exception ex)
{
throw ex;
}
finally
{
dataReader.Close();
sr.Close();
}
#endregion If there are headers DataTable.Load will suffice
}
//CsvHelper seems to make DataTable Columns readonly
foreach (DataColumn dc in dt.Columns)
{
dc.ReadOnly = false;
}
return(dt);
}
