Question

Opening CSV files with encoding.

Asked by: prakash_prk

Dear Friends,

I have a CSV file with some unicode contents, like "Tübingerstraße",  Also some records spaning into multiple lines. I have attached the csv file.

I have tried the two code blocks.

The first one uses the "WorkBooks.Open" method. It opens the csv file but the encoding is lost. I got "TübingerstraÃxe"  instead of "Tübingerstraße".  
The second one  uses the "WorkBooks.OpenText" method where i can specfiy the code page (65001 -> UTF 8). It opens the csv file with correct charectors. but the mulitline fields converted into multiple rows.

Is there any way to solve this?

-
prakash

// Way 1
Excel.Application objExcel = new Excel.Application();
objExcel.Visible = true;
object objOpt = System.Reflection.Missing.Value;
 
Excel.Workbooks objBooks = (Excel.Workbooks)objExcel.Workbooks;
 
Excel._Workbook book = objBooks.Open(@"E:\ExportedData.csv",
    objOpt, objOpt, objOpt, objOpt, objOpt, objOpt, Excel.XlPlatform.xlWindows , objOpt, objOpt, objOpt, objOpt, objOpt, objOpt, objOpt);
 
====
 
// Way 2
 
Excel.Application objExcel = new Excel.Application();
objExcel.Visible = true;
object objOpt = System.Reflection.Missing.Value;
 
Excel.Workbooks objBooks = (Excel.Workbooks)objExcel.Workbooks;
 
objBooks.OpenText(@"E:\ExportedData.csv", 65001, 1,
Excel.XlTextParsingType.xlDelimited,
Microsoft.Office.Interop.Excel.XlTextQualifier.xlTextQualifierDoubleQuote,
false, false, false, true, false, false, objOpt, objOpt, objOpt, objOpt, objOpt, objOpt, objOpt);

                                  
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Asked On
2008-12-18 at 21:41:32ID23997834
Tags

Excel

,

Workbooks.OpenText

,

CSV UTF-8

Topics

Microsoft Excel Spreadsheet Software

,

Microsoft Visual Basic.Net

,

C# Programming Language

Participating Experts
2
Points
200
Comments
13

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Answers

 

by: CSLARSENPosted on 2008-12-19 at 00:04:07ID: 23210794

This one works fine for me with regards to the unicode chars.

    Workbooks.OpenText Filename:= _
        "C:\ExportedData.txt", Origin:=65001, _
        StartRow:=1, DataType:=xlDelimited, TextQualifier:=xlDoubleQuote, _
        ConsecutiveDelimiter:=False, Tab:=False, Semicolon:=False, Comma:=True _
        , Space:=False, Other:=False, FieldInfo:=Array(Array(1, 1), Array(2, 1), _
        Array(3, 1)), TrailingMinusNumbers:=True
Cheers
cslarsen

 

by: CSLARSENPosted on 2008-12-19 at 00:12:30ID: 23210831

Uhh sorry missed the multiline aspect, seems like you have "hard" linebreaks represented by character with the ASCII code 10. I tested if you could change to a different linebreak char (13) but it made no difference.
Maybe you could come up with something different than the hard linebreak chars and thereby keep the multiline effect in the field.
Cheers
cslarsen

 

by: kaufmedPosted on 2008-12-19 at 00:24:06ID: 23210865

I executed the following against the text file you provided and it appears to do what you are looking for:

this.app.Workbooks.Open(@"C:\Users\Kenneth\Desktop\ExportedData.txt",
    XlUpdateLinks.xlUpdateLinksNever,
    false, 1, string.Empty, false, true, XlPlatform.xlWindows, ",", false, false, 0, true, false, false);
                                              
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by: kaufmedPosted on 2008-12-19 at 00:28:37ID: 23210877

Sorry, change "this.app" to "objExcel" for your needs.

 

by: prakash_prkPosted on 2008-12-19 at 02:07:27ID: 23211202

>Maybe you could come up with something different than the hard linebreak chars and thereby keep the multiline effect in the field.

Is there any chars I can use for the hard line breaks ?

Also the WorkBook.Open methods correctly identifies the records :) . don know how it was implemented.

kaufmed:
It worked but the unicode chars are changed to a junk one in the opened excel.

 

by: kaufmedPosted on 2008-12-19 at 02:34:22ID: 23211266

Can you try viewing the file I have attached? It is the file generated by the code I posted. It shows fine on my system. If you cannot view it properly, then I believe you have something wrong with your system configuration (as far as displaying unicode chars).

 

by: prakash_prkPosted on 2008-12-19 at 02:48:46ID: 23211314

what is the culture settings of your system?

 

by: kaufmedPosted on 2008-12-19 at 03:04:22ID: 23211394

I'm on Englsh(United States).

Were you able to view my file?

 

by: prakash_prkPosted on 2008-12-19 at 03:15:15ID: 23211439

yes. I got your file correctly.
I got the following file when I execute the code in my machine. look at the second column it have some junk characters.

I am also have the same regional settings US English culture.

 

by: kaufmedPosted on 2008-12-19 at 05:28:21ID: 23212104

I'm not sure. When I tried to execute the code as you originally posted it, I received a file similar to what you have just attached. However, when I changed the function calls parameters to those which I posted, I received the file I attached previously. I think the key component is the XlPlatform.xlWindows parameter. That tells the Excel object that the file is a Windows-formatted file (to handle the line breaks).

 

by: prakash_prkPosted on 2008-12-23 at 20:26:11ID: 23238470

thanks for your reply kaufmed. But it does not worked for me. I tried all the values for XLPlatform enumeration ( Macintosh, DOS,,..).


 

by: prakash_prkPosted on 2008-12-23 at 20:27:41ID: 23238476

Finally I got the solution.

First I have used the UTF-8 encoding to create the csv file. After I changed it to Unicode Little Endian byte order, the Workbooks.Open got working with unicode chars.

Excel._Workbook book = objBooks.Open(@"E:\ExportedData.csv",
    objOpt, objOpt, objOpt, objOpt, objOpt, objOpt, Excel.XlPlatform.xlWindows , objOpt, objOpt, objOpt, objOpt, objOpt, objOpt, objOpt);

ref :
http://www.myintervals.com/forum/discussion/280/making-csv-data-exports-with-utf8-more-excel-friendly/

Thank you very much for help

using (StreamWriter swriter = new StreamWriter(destinaionCSVPath, false, new UnicodeEncoding(false, true)))
{
      //Write code
}

 

by: CSLARSENPosted on 2009-01-08 at 03:53:16ID: 23324030

prakash_prk,
thanks for sharing the solution.
regards
cslarsen

20120131-EE-VQP-002

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