Open csv with semicolon as delimiter from C#

ThienZ

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Feb 10, 2005
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Germany
i read mikes post before that pointed a tutorial for excel automation... but i didnt found how can i open a file (a.e. csv file) with semicolon as delimiter...
Can someone help me writing the code in C#?

Thx in advance. :)
 
Hey ThienZ,

Using a non-standard delimiter such as the Semicolon requires the use of the Workbooks.OpenText() method. The help files read as follows:
OpenText Method

Loads and parses a text file as a new workbook with a single sheet that contains the parsed text-file data.

expression.OpenText(FileName, Origin, StartRow, DataType, TextQualifier, ConsecutiveDelimiter, Tab, Semicolon, Comma, Space, Other, OtherChar, FieldInfo, TextVisualLayout, DecimalSeparator, ThousandsSeparator, TrailingMinusNumbers, Local)
expression Required. An expression that returns one of the objects in the Applies To list.

FileName Required String. Specifies the file name of the text file to be opened and parsed.

Origin Optional Variant. Specifies the origin of the text file. Can be one of the following XlPlatform constants: xlMacintosh, xlWindows, or xlMSDOS. Additionally, this could be an integer representing the code page number of the desired code page. For example, "1256" would specify that the encoding of the source text file is Arabic (Windows). If this argument is omitted, the method uses the current setting of the File Origin option in the Text Import Wizard.

StartRow Optional Variant. The row number at which to start parsing text. The default value is 1.

DataType Optional Variant. Specifies the column format of the data in the file. Can be one of the following XlTextParsingType constants: xlDelimited or xlFixedWidth. If this argument is not specified, Microsoft Excel attempts to determine the column format when it opens the file.

TextQualifier Optional XlTextQualifier. Specifies the text qualifier.

XlTextQualifier can be one of these XlTextQualifier constants.
xlTextQualifierDoubleQuote default
xlTextQualifierNone
xlTextQualifierSingleQuote

ConsecutiveDelimiter Optional Variant. True to have consecutive delimiters considered one delimiter. The default is False.

Tab Optional Variant. True to have the tab character be the delimiter (DataType must be xlDelimited). The default value is False.

Semicolon Optional Variant. True to have the semicolon character be the delimiter (DataType must be xlDelimited). The default value is False.

Comma Optional Variant. True to have the comma character be the delimiter (DataType must be xlDelimited). The default value is False.

Space Optional Variant. True to have the space character be the delimiter (DataType must be xlDelimited). The default value is False.

Other Optional Variant. True to have the character specified by the OtherChar argument be the delimiter (DataType must be xlDelimited). The default value is False.

OtherChar Optional Variant (required if Other is True). Specifies the delimiter character when Other is True. If more than one character is specified, only the first character of the string is used; the remaining characters are ignored.

FieldInfo Optional xlColumnDataType. An array containing parse information for individual columns of data. The interpretation depends on the value of DataType. When the data is delimited, this argument is an array of two-element arrays, with each two-element array specifying the conversion options for a particular column. The first element is the column number (1-based), and the second element is one of the XlColumnDataType constants specifying how the column is parsed.

XlColumnDataType can be one of these XlColumnDataType constants.
xlGeneralFormat General
xlTextFormat Text
xlMDYFormat MDY date

xlDMYFormat DMY date

xlYMDFormat YMD date

xlMYDFormat MYD date

xlDYMFormat DYM date

xlYDMFormat YDM date

xlEMDFormat EMD date

xlSkipColumn Skip Column


You can use xlEMDFormat only if you have installed and selected Taiwanese language support. The xlEMDFormat constant specifies that Taiwanese era dates are being used.

The column specifiers can be in any order. If theres no column specifier for a particular column in the input data, the column is parsed with the General setting.

Notes

If you specify that a column is to be skipped, you must explicitly state the type for all remaining columns or the data will not parse correctly.
If there is a recognizible date in the data, the cell will be formatted as a date in the worksheet even if the setting for the column is General. Additionally, if you specify one of the above date formats for a column and the data does not contain a recognized date, then the cell format in the worksheet will be General.
This example causes the third column to be parsed as MDY (for example, 01/10/1970), the first column to be parsed as text, and the remaining columns in the source data to be parsed with the General setting.

Array(Array(3, 3), Array(1, 2))

If the source data has fixed-width columns, the first element in each two-element array specifies the position of the starting character in the column (as an integer; character 0 (zero) is the first character). The second element in the two-element array specifies the parse option for the column as a number between 0 and 9, as listed in the preceding table.

TextVisualLayout Optional Variant. The visual layout of the text.

DecimalSeparator Optional Variant. The decimal separator that Microsoft Excel uses when recognizing numbers. The default setting is the system setting.

ThousandsSeparator Optional Variant. The thousands separator that Excel uses when recognizing numbers. The default setting is the system setting.

The following table shows the results of importing text into Excel for various import settings. Numeric results are displayed in the rightmost column.

System decimal separator System thousands separator Decimal separator value Thousands separator value Text imported Cell value (data type)
Period Comma Comma Period 123.123,45 123,123.45 (numeric)
Period Comma Comma Comma 123.123,45 123.123,45 (text)
Comma Period Period Comma 123,123.45 123,123.45 (numeric)
Period Comma Period Comma 123 123.45 123 123.45 (text)
Period Comma Period Space 123 123.45 123,123.45 (numeric)

TrailingMinusNumbers Optional Variant.

Local Optional Variant.
You should try opening up the macro recorder to open your file, but here is what my recorder produced:
Code:
Workbooks.OpenText Filename:= _
        "C:\Documents and Settings\Owner\My Documents\MyFile.txt", _
        Origin:=437, StartRow:=1, DataType:=xlDelimited, TextQualifier:= _
        xlDoubleQuote, ConsecutiveDelimiter:=False, Tab:=False, Semicolon:=True, _
        Comma:=False, Space:=False, Other:=False, FieldInfo:=Array(Array(1, 1), _
        Array(2, 1)), TrailingMinusNumbers:=True
To translate the above into C#, youll have to:

(1) Remove the use of the Named parameters.
(2) Add a final value for the Local parameter, using Type.Missing for that value.
(3) I dont quite know what to do with the Array()s. An array of Integer may translate over fine. If that does not work, you may want to try an Array of Object, boxing Integer values. Im not 100% sure which way will work here.

I hope this at least gets you going!

-- Mike

[Also: Not directly related to this particular taks, but in [post=436298]This Post[/post] I use some basic C# code for Automating Excel. It should at least help you get a feel...]
 
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