Deleting multiple records from sql bound Datagrid - vb.net

Question

The procedures below allowed me to delete several records at once by checking the checkbox on my datagrid. The procedure was written on ASP.net but now I am using a winform on VB.net.
I have a datagrid with column name "Delete" where the checkboxes are located. The user would check
the records it wants to delete and the would delete those records. I use the "Ticket Number" column values as the parameter for my query.
The issue I have is that since was written for ASP.Net, I cannot find how the winform VB.net equivalent for this line:
Dim chkDelete As CheckBox = DirectCast(grdRoster.Rows(i).Cells(0).FindControl("Delete_Row"), CheckBox)
FindControl is not a member of System.Windows.Forms.DataGridViewCell. Plus I am pretty sure that the whole line is wrong since the checkboxes
are located on a datagrid column set as ColumnType: DataGridViewCheckBoxColumn and are not really individual controls.
How can I get the same result on a winform? Here is my entire code.
Private Sub btnDelete_Click(sender As Object, e As EventArgs) Handles btnDelete.Click
'Create String Collection to store
'IDs of records to be deleted
Dim ticketNumberCollection As New StringCollection()
Dim strTicketNumber As String = String.Empty
'Loop through GridView rows to find checked rows
For i As Integer = 0 To grdRoster.Rows.Count - 1
Dim chkDelete As CheckBox = DirectCast(grdRoster.Rows(i).Cells(0).FindControl("Delete_Row"), CheckBox)
If chkDelete IsNot Nothing Then
If chkDelete.Checked Then
strTicketNumber = grdRoster.Rows(i).Cells(1).ToString
ticketNumberCollection.Add(strTicketNumber)
End If
End If
Next
'Call the method to Delete records
DeleteMultipleRecords(ticketNumberCollection)
' rebind the GridView
grdRoster.DataBind()
End Sub
' Sub to delete multiple records
' #param "idCollection" calls the string collection above
' and deletes the selected record separated by ","
Private Sub DeleteMultipleRecords(ByVal ticketNumberCollection As StringCollection)
Dim IDs As String = ""
'Create string builder to store
'delete commands separated by ,
For Each id As String In ticketNumberCollection
IDs += id.ToString() & ","
Next
Try
Dim strTicketID As String = IDs.Substring(0, IDs.LastIndexOf(","))
DataSheetTableAdapter.DeleteRecord(strTicketID)
Catch ex As Exception
Dim errorMsg As String = "Error in Deletion"
errorMsg += ex.Message
Throw New Exception(errorMsg)
Finally
Me.Close()
End Try
End Sub

Answer 1

for deleting multiple records from a data bound gridview you should create the DataGridViewCheckBoxColumn at run time
Dim chk As New DataGridViewCheckBoxColumn()
DataGridView1.Columns.Add(chk)
chk.HeaderText = "Select"
'then bind your datagridview with dataset
Dim sql As String = "SELECT * FROM table_name"
' Dim connection As New SqlConnection(connectionString)
conn.Open()
sCommand = New SqlCommand(sql, conn)
sAdapter = New SqlDataAdapter(sCommand)
sBuilder = New SqlCommandBuilder(sAdapter)
sDs = New DataSet()
sAdapter.Fill(sDs, "table_name")
sTable = sDs.Tables("table_name")
DataGridView1.DataSource = sDs.Tables("table_name")
'then traverse through each column and get the checked values
Try
DataGridView1.EndEdit()
For j = Me.DataGridView1.Rows.Count - 1 To 0 Step -1
If Not IsDBNull(DataGridView1.Rows(j).Cells(0).Value) Then
If DataGridView1.Rows(j).Cells(0).Value = True Then
check = True
If MessageBox.Show("Do you want to delete these records?", "Delete", MessageBoxButtons.YesNo) = DialogResult.Yes Then
For i = Me.DataGridView1.Rows.Count - 1 To 0 Step -1
If Not IsDBNull(DataGridView1.Rows(i).Cells(0).Value) Then
If DataGridView1.Rows(i).Cells(0).Value = True Then
'remove the checked columns and update datatable
DataGridView1.Rows.RemoveAt(i)
sAdapter.Update(sTable)
End If
End If
Next
Else
Return
End If
Else
End If
End If
Next
If check = False Then
MsgBox("Nothing Selected")
End If
Catch ex As Exception
MsgBox(ex.ToString)
End Try