How do I extract columns from csv file with reading another column in C#?

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I have a csv file like this.

2;PlatesPatches;2451;1166.95410292072
2;PlatesPatches;1389.5966620306;788.205841446453
2;PlatesPatches;1320.50069541029;767.732962447844
2;PlatesPatches;1356.32823365786;754.937413073714
2;PlatesPatches;1625.0347705146;839.388038942976
2;PlatesPatches;2205.95271210014;1000.61196105702
2;PlatesPatches;2451;1056.9123783032
3;SmallPatchesmosaicpavement;2354.38108484006;977.579972183588
3;SmallPatchesmosaicpavement;2451;1000.61196105702
3;SmallPatchesmosaicpavement;2451;1064.58970792768
3;SmallPatchesmosaicpavement;1988.42837273992;946.870653685675
3;SmallPatchesmosaicpavement;1394.71488178025;780.528511821975
3;SmallPatchesmosaicpavement;1404.95132127956;770.29207232267
3;SmallPatchesmosaicpavement;2065.2016689847;913.602225312935
4;Gravel;2165.00695410292;1062.03059805285
4;Gravel;2141.97496522949;1064.58970792768
4;Gravel;2121.50208623088;1067.1488178025
4;Gravel;2106.14742698192;1067.1488178025
4;Gravel;2090.79276773296;1067.1488178025
4;Gravel;2075.43810848401;1069.70792767733
4;Gravel;2060.08344923505;1072.26703755216
4;Gravel;2039.61057023644;1074.82614742698
4;Gravel;2016.578581363;1079.94436717663
4;Gravel;1988.42837273992;1082.50347705146
4;Gravel;1955.15994436718;1085.06258692629
4;Gravel;1824.64534075104;1015.96662030598
4;Gravel;1916.77329624478;1003.17107093185
4;Gravel;1983.31015299026;1000.61196105702

with respect to first column i want to print values of 3rd and 4th column.
like when first column value is 2 until then all the values of 3rd and 4th will print?

What I have tried:

OpenFileDialog opn = new OpenFileDialog();

if (opn.ShowDialog() == DialogResult.OK)
{
StreamReader sr = new StreamReader(opn.FileName);

List<string[]> data = new List<string[]>();

int Row = 0;

while (!sr.EndOfStream)
{
string[] Line = sr.ReadLine().Split(',');
data.Add(Line);
Row++;
Console.WriteLine(Row);
}

}

Posted 1-Dec-17 20:22pm

Member 13458399

Updated 1-Dec-17 22:21pm

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Richard MacCutchan · Answer 1 · 2017-12-01T22:21:00

This is your third question on the same subject and you still do not seem to understand the format of your data. Your string[] Line = sr.ReadLine().Split(','); is not going to work because your data uses the semi-colon (';') character as a field delimiter, not the comma. I would suggest you study Using OleDb to Import Text Files (tab, CSV, custom)[^] which will make things much simpler.