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Delete a raw from a table by dynamically created button RRS feed

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    Hello,

    I've been new to vb asp.net web development and I'm looking for a solution for this issue since a week. but still, the situation is same.

    what I want to do is, I need to delete the selected row which has been created dynamically in the web page. I have been trying several methods. but none of these are working. 

    this is my codes and sample screen. 

    Imports System.Data

Partial Class add_stock
    Inherits System.Web.UI.Page

    Private numOfColumns As Integer = 1
    Private ctr As Integer = 0
    Private table As Table = Nothing


    Dim row As New TableRow()
    Dim cell As New TableCell()
    Dim tb9 As New Button
    Dim panel2 As New Panel


    Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
        If Not IsPostBack Then
            table = New Table()
            table.ID = "tableBuild"
            Session("table") = table

            ViewState("ctr") = ctr
        End If
        ctr = CType(ViewState("ctr"), Int32)
        table = DirectCast(Session("table"), Table)
        Panel1.Controls.Add(table)
    End Sub
    Private Sub GenerateTable(ByVal colsCount As Integer)
        ctr += 1


        Dim tb As New TextBox()
        tb.Text = TextBox21.Text
        tb.ID = "TextBoxRow_" & ctr
        tb.Width = 80
        tb.Enabled = False
        cell.Controls.Add(tb)
        row.Cells.Add(cell)


        Dim cell1 As New TableCell()
        Dim tb1 As New TextBox()
        tb1.Text = TextBox19.Text
        tb1.ID = "TextBox1Row_" & ctr
        tb1.Width = 80
        tb1.Enabled = False
        cell1.Controls.Add(tb1)
        row.Cells.Add(cell1)

        Dim cell2 As New TableCell()
        Dim tb2 As New TextBox()
        tb2.Text = TextBox22.Text
        tb2.ID = "TextBox2Row_" & ctr
        tb2.Width = 80
        tb2.Enabled = False
        cell2.Controls.Add(tb2)
        row.Cells.Add(cell2)

        Dim cell3 As New TableCell()
        Dim tb3 As New TextBox()
        tb3.Text = TextBox17.Text
        tb3.ID = "TextBox3Row_" & ctr
        tb3.Width = 80
        tb3.Enabled = False
        cell3.Controls.Add(tb3)
        row.Cells.Add(cell3)

        Dim cell4 As New TableCell()
        Dim tb4 As New TextBox()
        tb4.Text = TextBox23.Text
        tb4.ID = "TextBox4Row_" & ctr
        tb4.Width = 80
        tb4.Enabled = False
        cell4.Controls.Add(tb4)
        row.Cells.Add(cell4)

        Dim cell5 As New TableCell()
        Dim tb5 As New TextBox()
        tb5.Text = TextBox20.Text
        tb5.ID = "TextBox5Row_" & ctr
        tb5.Width = 80
        tb5.Enabled = False
        cell5.Controls.Add(tb5)
        row.Cells.Add(cell5)

        Dim cell6 As New TableCell()
        Dim tb6 As New TextBox()
        tb6.Text = TextBox18.Text
        tb6.ID = "TextBox6Row_" & ctr
        tb6.Width = 80
        tb6.Enabled = False
        cell6.Controls.Add(tb6)
        row.Cells.Add(cell6)

        Dim cell7 As New TableCell()
        Dim tb7 As New TextBox()
        tb7.Text = DropDownList4.Text
        tb7.ID = "TextBox7Row_" & ctr
        tb7.Width = 80
        tb7.Enabled = False
        cell7.Controls.Add(tb7)
        row.Cells.Add(cell7)

        Dim cell8 As New TableCell()
        Dim tb8 As New TextBox()
        tb8.Text = DropDownList3.Text
        tb8.ID = "TextBox8Row_" & ctr
        tb8.Width = 80
        tb8.Enabled = False
        cell8.Controls.Add(tb8)
        row.Cells.Add(cell8)


        Dim cell9 As New TableCell()
        tb9.Text = "Delete"
        tb9.ID = ctr
        tb9.Width = 80
        'tb9.Enabled = False
        'panel2.Controls.Add(tb9)
        'cell9.Controls.Add(tb9)
        'row.Cells.Add(cell9)
        AddHandler tb9.Click, AddressOf Me.Button3_Click
        cell9.Controls.Add(tb9)
        row.Cells.Add(cell9)


        'tb9 = New CheckBox()
        'tb9.ID = "chkExample"
        'tb9.Text = "Check / Uncheck"
        'tb9.AutoPostBack = True
        'AddHandler tb9.CheckedChanged, AddressOf Button3_Click
        'Me.Form.Controls.Add(tb9)

        table.Rows.Add(row)
        Session("table") = table
        ViewState("ctr") = ctr

    End Sub

    Protected Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

        '   ClientScript.RegisterStartupScript(Me.GetType, "Button_Alert", "alert('Button clicked!');", True)
        numOfColumns = 1
        'Generate the Table based from the inputs
        GenerateTable(numOfColumns)
    End Sub

    Protected Sub Button2_Click(ByVal sender As Object, ByVal e As EventArgs)
        ClientScript.RegisterStartupScript(Me.GetType, "Button_Alert", "alert('Button clicked!');", True)
        numOfColumns = 1
        'Generate the Table based from the inputs
        GenerateTable(numOfColumns)
    End Sub
    Protected Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click


    End Sub
End Class


    Friday, April 20, 2018 8:58 AM
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    Most will point you to the ASP.Net forums, but I've seen an other contributor complaining that there are no answers given and certainly not on this kind of questions. While this is a real VB problem likewise the so often handled winform questions in this forum.

    It has to do that a Webform has no state like a winform. It means that you have to get the flushed data again back into your table before you use it at postback. 

    Luckily you did put it in the session, so I guess the only thing you've to do is in the button events

    table=session(table)
    Maybe better that you start using 2018 conventions and start global values with an upper case, in this case Table. 


    Success
    Cor





    Friday, April 20, 2018 9:13 AM
    |