How to concatenate Datagridview rows values and store it into one datatable Cell

How to concatenate Datagridview rows values and store it into one datatable Cell

By : user2952682
Date : November 19 2020, 01:01 AM
it helps some times I have a datagridview with one column, i want to concatenate the datagridview rows values and , Try this:
code :
libArt +=  string.Join(",", row1.Cells.Cast<DataGridViewCell>().Where(c => c.Value != null).Select(c => c.Value.ToString()).ToArray());

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Detect rows in DataGridView whose cell values have been changed by user

Detect rows in DataGridView whose cell values have been changed by user

By : jsprakash
Date : March 29 2020, 07:55 AM
This might help you Well, if you go hunting long enough and spend enough time trying different things, you'll eventually find an answer...
Here's the working code I ended up with:
code :
Private Sub dgvEmployees_CellValueChanged(sender As Object, e As DataGridViewCellEventArgs) Handles dgvEmployees.CellValueChanged
    ' Pass the row and cell indexes to the method so we can change the color of the correct row
    CompareDgvToDataSource(e.RowIndex, e.ColumnIndex)
End Sub

Private Sub CompareDgvToDataSource(ByVal rowIndex As Integer, ByVal columnIndex As Integer)

    If Not dgvEmployees Is Nothing And dgvEmployees.Rows.Count > 0 Then
        ' Condition required because this Method is also called when the DGV is being built and populated
        Console.WriteLine("rowIndex: " & rowIndex.ToString() & ", columnIndex: " & columnIndex.ToString() & ", cell value: " & dgvEmployees.Rows(rowIndex).Cells(columnIndex).Value.ToString())
    End If

    ' Force ending Edit mode so the last edited value is committed

    Dim dsChanged As DataSet = EmployeesDataSet.GetChanges()

    If Not dsChanged Is Nothing Then

        For Each dt As DataTable In dsChanged.Tables
            For Each row As DataRow In dt.Rows
                For i As Integer = 0 To dt.Columns.Count - 1
                    If Not row(i, DataRowVersion.Current).Equals(row(i, DataRowVersion.Original)) Then
                        Console.WriteLine("Row index: " & dt.Rows.IndexOf(row))
                        dgvEmployees.Rows(rowIndex).DefaultCellStyle.BackColor = Color.LightPink
                    End If
    End If
End Sub
How can I concatenate all the column values in a row, and then concatenate all rows in a DataTable into a single string?

How can I concatenate all the column values in a row, and then concatenate all rows in a DataTable into a single string?

By : Ramy Elnaghy
Date : March 29 2020, 07:55 AM
hop of those help? I am trying to concatenate all the columns and then all the rows of a DataTable. , It can be something like this
code :
var paramValues = String.Join(",", 
                     rows.Select(x => "(" + String.Join(",", x.ItemArray) + ")" ));
modify (encrypt/decrypt) cell values in rows of datagridview

modify (encrypt/decrypt) cell values in rows of datagridview

By : Busyel
Date : November 12 2020, 11:01 PM
will be helpful for those in need Create a Dataset and use Dataset.ReadXml Method to read the Xml Data And then choose the specified datatable from the dataset as a datasource for the datagridView. it is easier to manipulate datatable rows.
use the decryption function on the DatagridView.formatingRow event
code :
For Each row As DataRow In dtDataTable.Rows
row("Pass") = Encrypt(row("Pass")
How to apply loop in datagridview rows based on cell values

How to apply loop in datagridview rows based on cell values

By : ninjakidd
Date : March 29 2020, 07:55 AM
seems to work fine This should be an easy fix for your homework. BUT you should understand the code and not just copy/paste the answer.
code :
Private Sub DGVGRADES_CellValueChanged(sender As Object, e As DataGridViewCellEventArgs) Handles DGVGRADES.CellValueChanged
    For Each row As DataGridViewRow In DGVGRADES.Rows
        If Double.TryParse(row.Cells(4).Value, Nothing) = False Then
            If row.Cells(4).Value.ToString = "NFE" Then
                row.Cells(0).Value = 0
            ElseIf row.Cells(4).Value.ToString = "IP" Then
                row.Cells(0).Value = 0
            End If

            If row.Cells(4).Value >= 75 Then
                row.Cells(0).Value = row.Cells(3).Value
            ElseIf row.Cells(4).Value.ToString <= 3 Then
                row.Cells(0).Value = row.Cells(3).Value
            ElseIf row.Cells(4).Value < 75 Then
                row.Cells(0).Value = 0
            End If
        End If
End Sub
Better method to Split Cell values in multiple Rows and Concatenate these values in the next Column with formatting inta

Better method to Split Cell values in multiple Rows and Concatenate these values in the next Column with formatting inta

By : Anytos
Date : March 29 2020, 07:55 AM
it helps some times Finding your columns
Regex solutions are extremely useful when you are looking for complex string combinations, but in VBA they can be a little slow. Given the simplicity of your match patterns, it'd probably easier and faster to use more 'primitive' string comparisons. Say, for example, your Document Id's are between 10000 and 1000000000, you could simply try to convert your string to a Long and see if the value is between those numbers. A similar approach could be used comparing each side of a decimal for your Document Version comparison.
code :
Option Explicit

Private Const ID_IDX As Long = 0
Private Const VER_IDX As Long = 1
Private Const RNG_IDX As Long = 2

Private Sub RunMe()
    Dim data As Variant, cols As Variant, items As Variant
    Dim r As Long, c As Long, i As Long, n As Long
    Dim ids() As String, vers() As String
    Dim addItems As Collection, concatItems As Collection
    Dim dataRng As Range, rng As Range
    Dim writeID() As Variant, writeVer() As Variant, writeConcat() As Variant
    Dim dataStartRow As Long

    'Define the range we're interested in and read into an array.
    With Sheet1 'adjust for your worksheet object
        Set dataRng = .Range(.Cells(1, "A"), .Cells(.Rows.Count, "A").End(xlUp)) _
                      .Resize(, .Cells(1, .Columns.Count).End(xlToLeft).Column)
       End With
    data = dataRng.Value2
    dataStartRow = 2

    'Find the two target columns
    cols = AcquireIdAndVerCol(data, 3, 8)
    If IsEmpty(cols) Then
        MsgBox "Unable to find Id and Ver columns."
        Exit Sub
    End If

    With dataRng
        'Add a column next to the version number column.
        .Columns(cols(VER_IDX)).Offset(, 1).Insert Shift:=xlShiftToRight, CopyOrigin:=xlFormatFromLeftOrAbove

        'Add a column to our range.
        'This is to cover the case that the rightmost column is the version number column.
        Set dataRng = .Resize(, .Columns.Count + 1)
    End With

    'Find the rows that need to be split and concatenate the target strings.
    Set addItems = New Collection
    Set concatItems = New Collection
    For r = dataStartRow To UBound(data, 1)

        ids = Split(data(r, cols(ID_IDX)), vbLf)
        vers = Split(data(r, cols(VER_IDX)), vbLf)
        n = IIf(UBound(ids) >= UBound(vers), UBound(ids), UBound(vers))

        If n = 0 Then 'it's just one line of text.

            'Add concatenated text to list.
            concatItems.Add data(r, cols(ID_IDX)) & " " & data(r, cols(VER_IDX))

        ElseIf n > 0 Then 'it's multiple lines of text.

            'Transpose the id array.
            ReDim writeID(1 To UBound(ids) + 1, 1 To 1)
            For i = 0 To UBound(ids)
                writeID(i + 1, 1) = ids(i)
            'Transpose the version array.
            ReDim writeVer(1 To UBound(vers) + 1, 1 To 1)
            For i = 0 To UBound(ids)
                writeVer(i + 1, 1) = vers(i)

            'Add concatenated text to list.
            For i = 0 To n
                concatItems.Add (IIf(UBound(ids) <= n And UBound(vers) <= n, ids(i) & " " & vers(i), Empty))

            'Add the range to be split to the collection.
            addItems.Add Array(writeID, writeVer, dataRng.Rows(r + 1).Resize(n))

        Else 'it's an empty cell

            'Add empty item to concatenated list in order to keep alignment.
            concatItems.Add Empty

        End If


    Application.ScreenUpdating = False

    'Split the ranges in the list.
    If addItems.Count > 0 Then
        For Each items In addItems
            'Add the rows.
            With items(RNG_IDX)
                .Insert Shift:=xlDown, CopyOrigin:=xlFormatFromLeftOrAbove
                Set rng = .Offset(-.Rows.Count - 1).Resize(.Rows.Count + 1)
                'Note: format your rng Range obect as desired here.
            End With
            'Write the id and version values.
            rng.Columns(cols(ID_IDX)).Value = items(ID_IDX)
            rng.Columns(cols(VER_IDX)).Value = items(VER_IDX)
    End If

    'Write the concatenated values.
    If concatItems.Count > 0 Then
        ReDim writeConcat(1 To concatItems.Count + dataStartRow - 1, 1 To 1)
        'Header to array.
        writeConcat(1, 1) = "Concat values"
        'Values from the collection to array.
        i = dataStartRow
        For Each items In concatItems
            writeConcat(i, 1) = items
            i = i + 1
        'Output array to range.
        With dataRng.Columns(cols(VER_IDX) + 1)
            .Value = writeConcat
        End With
    End If

    Application.ScreenUpdating = True
End Sub

Private Function AcquireIdAndVerCol(data As Variant, minCol As Long, maxCol As Long) As Variant
    Dim result(1) As Long
    Dim r As Long, c As Long, i As Long
    Dim items() As String

    'Check we're not operating outside bounds of data array.
    If minCol < LBound(data, 2) Then minCol = LBound(data, 2)
    If minCol > UBound(data, 2) Then minCol = UBound(data, 2)
    If maxCol < LBound(data, 2) Then maxCol = LBound(data, 2)
    If maxCol > UBound(data, 2) Then maxCol = UBound(data, 2)

    'Loop through data to find the two columns.
    'Once found, leave the function.
    For r = 1 To UBound(data, 1)
        For c = minCol To maxCol
            items = Split(data(r, c), vbLf)
            For i = 0 To UBound(items)
                If result(ID_IDX) = 0 Then
                    If IsDocId(items(i)) Then
                        result(ID_IDX) = c
                        If result(VER_IDX) = 0 Then
                            Exit For
                            AcquireIdAndVerCol = result
                            Exit Function
                        End If
                    End If
                End If
                If result(VER_IDX) = 0 Then
                    If IsDocVer(items(i)) Then
                        result(VER_IDX) = c
                        If result(ID_IDX) = 0 Then
                            Exit For
                            AcquireIdAndVerCol = result
                            Exit Function
                        End If
                    End If
                End If

End Function
Private Function IsDocId(val As String) As Boolean
    Dim n As Long

    n = TryClng(val)
    IsDocId = (n > 9999 And n <= 999999999)
End Function

Private Function IsDocVer(val As String) As Boolean
    Dim n As Long, m As Long
    Dim items() As String

    items = Split(val, ".")
    If UBound(items) <> 1 Then Exit Function

    n = TryClng(items(0))
    m = TryClng(items(1))

    IsDocVer = (n > 0 And n <= 99) And (m >= 0 And m <= 9)
End Function

'Converts a variant to a Long or returns a fail value as a Long
'if the conversion failed.
Private Function TryClng(expr As Variant, Optional fail As Long = -1) As Long
    Dim n As Long

    n = fail
    On Error Resume Next
    n = CLng(expr)
    On Error GoTo 0

    TryClng = n
End Function
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