How to Import Data from or Export Data to CSV or Text File in DataGridView using C# Let’s start with how to import data from CSV or Text File in DataGridView. So, first of all, you need to read the targeted File to import its content.

Situation: need to read a CSV (txt) file that has no header and has 4 fields (all numeric), the number of lines will vary.

Sample data:
160827,00003,000000075,0000025
84144,00001,000000050,0000050
161060,00002,000000050,0000025
40015,00002,000000100,0000050
61955,00002,000000100,0000050
etc
etc

I want to read this file into a DataGridView for proofing and later insert all these lines into an Access db with 2 additional fields added.

I've been able to access, read/populate the CSV file into the Grid (code below) but I have the following problem(s):
If I set the 4 column headers and other parms of the Grid at design; my sub inserts 4 more columns when it reads/populates the Grid. OR
If I don't set the Headers and Parms, it reads the first line of the CSV into the Grid as Header info.

I tried setting the Gri'ds AutoGenerateColumns=false but that didn't help.

Can anyone point me in the right direction?

Thanks,

`Public Sub GetCsvData()

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I created a DataGridView and added four columns. I copied your sample input into d:temptestdata.txt and ran the following code:

If ColumnHeadersVisible is set …

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poojavb29

Ok let me tell u what I have done..

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I have a Datagridview in which I have added 6 columns manually through property window,
On button click I have the following code..but before that declare two variables

then in button click write

Hope this is what u needed

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This example opens a StreamWriter object with the My.Computer.FileSystem.OpenTextFileWriter method and uses it to write a string to a text file with the WriteLine method of the StreamWriter class.

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The following conditions may cause an exception:

• The file exists and is read-only (IOException).

• The disk is full (IOException).

• The pathname is too long (PathTooLongException).

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This example creates a new file, if the file does not already exist. If an application needs to create a file, that application needs Create access for the folder. If the file already exists, the application needs only Write access, a lesser privilege. Where possible, it is more secure to create the file during deployment, and only grant Read access to a single file, rather than Create access for a folder.

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