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The code below is used to write all data/enteries in the DataGridView to the csv. file, I would like to know how I can modify this, so that only rows selected via the dataGridViewCheckboxColumn will be written to the file, and not the whole thing.

What I have tried:

```Dim StrExport As String = ""
For Each C As DataGridViewColumn In dataGVGeneral.Columns
StrExport &= """" & C.HeaderText & ""","
Next
StrExport = StrExport.Substring(0, StrExport.Length - 1)
StrExport &= Environment.NewLine

For Each R As DataGridViewRow In dataGVGeneral.Rows
For Each C As DataGridViewCell In R.Cells
If Not C.Value Is Nothing Then
StrExport &= """" & C.Value.ToString & ""","
Else
StrExport &= """" & "" & ""","
End If
Next
StrExport = StrExport.Substring(0, StrExport.Length - 1)
StrExport &= Environment.NewLine
Next

Dim tw As System.IO.TextWriter = New System.IO.StreamWriter("E:\SAT\Work.io\Work.io\bin\Debug\ListofTasks.csv", False)
tw.Write(StrExport)
tw.Close()
```
Posted
Updated 29-Jul-20 22:37pm
Garth J Lancaster 30-Jul-20 3:28am
c'mon - you've been through iterations of this before - if you have a checkbox column in the datagridview, then, while you're looping through the datagridview rows, if the cherckbox column .Selected = True then write that row, but build that row from the other columns not including the checkbox column
Shaheer Rizwan 30-Jul-20 3:32am
sorry, im a bit of a slow learner and noob. well thanks for this, will the
If clmSelected.Selected = True
Then
statement, before StrExport = StrExport.Substring(0, StrExport.Length -1)?
Richard MacCutchan 30-Jul-20 5:10am
Yes, just test the checkbox value of each entry as you process them. Why is that so complicated?
Shaheer Rizwan 30-Jul-20 6:02am
its just not working and im confused man
Richard MacCutchan 30-Jul-20 6:09am
The logic is fairly simple:
```For Each Row in your datagridview:
If the checkbox column value is True
Write the other column cells to the csv file
End If
End For
```

So all you need to do is fill in the details ...

## Solution 1

Come on, this isn't complicated:
1) Identify the column containing the checkbox.
2) Inside your Rows loop, cast the current row / checkbox column cell to a check box, and test it's "Checked" property. If it's `true`, add it to the CSV. If it isn't, skip the row.

What part of that is difficult for you?

Shaheer Rizwan 30-Jul-20 3:40am
Im just newbie man. I get confused by what does what even though ive read it a million times.

Anyways, will this work

For Each R As DataGridViewRow In dataGVGeneral.Rows
If clmSelected.Selected = True Then
For Each C As DataGridViewCell In R.Cells
If Not C.Value Is Nothing Then
StrExport &= """" & C.Value.ToString & ""","
Else
StrExport &= """" & "" & ""","
End If
Next
StrExport = StrExport.Substring(0, StrExport.Length - 1)
StrExport &= Environment.NewLine
End If
Next
Garth J Lancaster 30-Jul-20 3:46am
will this work ? you ask - test it, find out, experiment - Information Technology IS a science - formulate a hypothesis (write some code), test it, modify it and try again
Shaheer Rizwan 30-Jul-20 4:01am
well i tried this and just no luck, I put the it before the For Loops, no luck.

Dim StrExport As String = ""
For Each C As DataGridViewColumn In dataGVGeneral.Columns
StrExport &= """" & C.HeaderText & ""","
Next
StrExport = StrExport.Substring(0, StrExport.Length - 1)
StrExport &= Environment.NewLine
If clmSelected.Selected = True Then
For Each R As DataGridViewRow In dataGVGeneral.Rows
For Each C As DataGridViewCell In R.Cells
If Not C.Value Is Nothing Then
StrExport &= """" & C.Value.ToString & ""","
Else
StrExport &= """" & "" & ""","
End If
Next
StrExport = StrExport.Substring(0, StrExport.Length - 1)
StrExport &= Environment.NewLine
Next
Dim tw As System.IO.TextWriter = New System.IO.StreamWriter("E:\SAT\Work.io\Work.io\bin\Debug\ListofTasks.csv", False)
tw.Write(StrExport)
tw.Close()
EndIf
OriginalGriff 30-Jul-20 4:55am
No. Why should it work? That's just "coding by guesswork" - and that never works well.

Go back to your original code, read what I said again, and think about what you need to do.
Shaheer Rizwan 30-Jul-20 6:07am
can you give me a clue or something man im really stuck :(