How to open a CSV file separated with '\t' programmatically in C# windows application

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Hi,
I have a CSV file in which the columns are separated with '\t'. I need to open the file programmatically with proper separation of columns. Please help me to view the file in windows application in runtime. Tried the below code but didn't work for me. It is still not in the required format.

Thanks in advance.

What I have tried:

C#

Excel.Application xlApp;
              object misValue = System.Reflection.Missing.Value;
              xlApp = new Excel.Application();
              xlApp.Workbooks.OpenText(@"c:\polsamples\POLList_201633.csv", Microsoft.Office.Interop.Excel.XlTextParsingType.xlDelimited);
              xlApp.Visible = true;

Posted 6-Oct-16 19:53pm

User1454

Updated 7-Oct-16 11:01am

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Suvendu Shekhar Giri 7-Oct-16 2:03am

"not in the required format"
what is the required format?

User1454 7-Oct-16 2:09am

For e.g : This is the required format
Id Student Marks
1 Jake 99
2 Luke 98

But now this is viewed as :
IdStudentMarks
1Jake99
2Luke98

Columns does not get separated with '\t' unless it is done manually (open excel-> DATA->From Text->Finish)

Sinisa Hajnal 7-Oct-16 4:19am

Check the properties of interop object you use. There should be one defining the separator.

F-ES Sitecore 7-Oct-16 4:51am

The OpenText method accepts a "Tab" parameter that lets you say it's tab delimited. https://msdn.microsoft.com/en-us/library/office/ff837097.aspx

User1454 7-Oct-16 5:14am

Tried this as well, but didn't work :(
var ExcelApp = new Excel.Application();
ExcelApp.Workbooks.OpenText( path, Tab:true);
ExcelApp.Visible = true;

4 solutions

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Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) · Answer 1 · 2016-10-06T22:47:00

Solution 1

I think you are using Interop. Avoid using that.

You can write your own logic using open source projects mentioned over here - C# convert csv to xls (using existing csv file)[^]

Posted 6-Oct-16 22:47pm

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

#realJSOP · Answer 2 · 2016-10-06T23:57:00

Solution 2

I recently posted an article for a CSV file parser. Right now, it only uses a comma as the separator, but it would be a minor exercise to make the delimiter configurable.

CSV File Parser[^]

Posted 6-Oct-16 23:57pm

#realJSOP

Patrice T · Answer 3 · 2016-10-07T00:13:00

Solution 3

Excel know how to open such files.
By using the macro recording feature, you can record steps to open the file and when record is finished, you can see what excel did to open.
It should not be too complicated to translate in your code.

Posted 7-Oct-16 0:13am

Patrice T

Comments

User1454 7-Oct-16 8:14am

Actually I need to open CSV file in excel from windows application.
For e.g : using 'Process.Start(filename.csv); ' it should be able open but since this \t separated,once it is opened from application, it displays as a single text in each row instead of categorizing into columns.

manu_dhobale · Answer 4 · 2016-10-07T11:00:00

Just convert your tab to comma

C#

var path = @"c:\polsamples\POLList_201633.csv";
var lines = File.ReadAllLines(path);
var newLines = lines.Select(l => string.Join(",", l.Split('\t')));
File.WriteAllLines(path, newLines);


Microsoft.Office.Interop.Excel.Application xlApp;
object misValue = System.Reflection.Missing.Value;
xlApp = new Microsoft.Office.Interop.Excel.Application();
xlApp.Workbooks.OpenText(path, Microsoft.Office.Interop.Excel.XlTextParsingType.xlFixedWidth);
xlApp.Visible = true;