Add new row to asp table on each button-Click

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Hi i need to add new row in asp table with textbox and dropdownlist when user clicks

the button.
How can I specify cell for dropdownlist and others for textboxes?

Here is my code with textbox only

VB

Imports System.Web

Imports System.Web.UI

Imports System.Web.UI.WebControls

Partial Class _Default
    Inherits System.Web.UI.Page
    Dim numOfRows As String
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        'Generate the Rows on Initial Load

        If Not Page.IsPostBack Then


            GenerateTable(numOfRows)
        End If

    End Sub

    Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
        If ViewState("RowsCount") IsNot Nothing Then

            numOfRows = Convert.ToInt32(ViewState("RowsCount").ToString())


            GenerateTable(numOfRows)

        End If

    End Sub
    Private Sub SetPreviousData(ByVal rowsCount As Integer, ByVal colsCount As Integer)

        Dim table As Table = DirectCast(Page.FindControl("Table1"), Table)

        If table IsNot Nothing Then

            For i As Integer = 0 To rowsCount - 1

                For j As Integer = 0 To colsCount - 1

                    'Extracting the Dynamic Controls from the Table

                    Dim tb As TextBox = DirectCast(table.Rows(i).Cells(j).FindControl("TextBoxRow_" & i & "Col_" & j), TextBox)

                    'Use Request objects for getting the previous data of the dynamic textbox


                    tb.Text = Request.Form("TextBoxRow_" & i & "Col_" & j)

                Next

            Next
        End If

    End Sub



    Private Sub GenerateTable(ByVal rowsCount As Integer)


        'Creat the Table and Add it to the Page

        Dim table As New Table()

        table.ID = "Table1"

        Page.Form.Controls.Add(table)



        'The number of Columns to be generated

        Const colsCount As Integer = 3
        'You can changed the value of 3 based on you requirements


        ' Now iterate through the table and add your controls



        For i As Integer = 0 To rowsCount - 1

            Dim row As New TableRow()

            For j As Integer = 0 To colsCount - 1

                Dim cell As New TableCell()

                Dim tb As New TextBox()



                ' Set a unique ID for each TextBox added

                tb.ID = "TextBoxRow_" & i & "Col_" & j

                ' Add the control to the TableCell

                cell.Controls.Add(tb)

                ' Add the TableCell to the TableRow


                row.Cells.Add(cell)

            Next



            ' And finally, add the TableRow to the Table


            table.Rows.Add(row)
        Next



        'Set Previous Data on PostBacks

        SetPreviousData(rowsCount, colsCount)



        'Sore the current Rows Count in ViewState

        rowsCount += 1

        ViewState("RowsCount") = rowsCount


    End Sub

I need to add dropdownlist in every first cell in new row.
please some one help me for getting this solution.

Posted 27-Jul-13 5:57am

Dena2013

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Comments

Mahesh Bailwal 27-Jul-13 14:34pm

You add dropdownlist same way as you are adding text box. Are you getting any error while doing that?

Dholakiya Ankit 27-Jul-13 15:02pm

what u want?

Dena2013 27-Jul-13 17:33pm

I want to add dropdownlist in the first cell only and textbox in others cells.

3 solutions

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Mahesh Bailwal · Answer 1 · 2013-07-27T19:39:00

Below is code for your reference for adding dropdownlist. It may help you.

For i As Integer = 0 To rowsCount - 1
           Dim row As New TableRow()
           For j As Integer = 0 To colsCount - 1
               Dim cell As New TableCell()

               If (j = 0) Then
                   Dim ddl As New DropDownList()
                   ddl.ID = "DropDownList" & i & "Col_" & j
                   cell.Controls.Add(ddl)
               Else
                   Dim tb As New TextBox()
                   tb.ID = "TextBoxRow_" & i & "Col_" & j
                   cell.Controls.Add(tb)

               End If

               row.Cells.Add(cell)
           Next
       Next

M.Saied · Answer 2 · 2013-07-27T21:17:00

Solution 2

Try This [Creating Dynamic DropDownList Controls in ASP.Net]

Posted 27-Jul-13 21:17pm

M.Saied

Dena2013 · Answer 3 · 2013-07-29T15:23:00

I find the result which I need

VB

Imports System.Data
Imports System.Configuration
Imports System.Web
Imports System.Web.Security
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Web.UI.WebControls.WebParts
Imports System.Web.UI.HtmlControls

Partial Public Class [Default2]
    Inherits System.Web.UI.Page

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

    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 row As New TableRow()

        Dim cell As New TableCell()

        Dim tb As New TextBox()

        tb.ID = "TextBoxRow_" & ctr
        tb.Width = 80

        ' Add the control to the TableCell

        cell.Controls.Add(tb)

        ' Add the TableCell to the TableRow

        row.Cells.Add(cell)

        Dim cell1 As New TableCell()

        Dim dd As New DropDownList
        dd.ID = "dd1" & ctr

        dd.Width = 80

        Dim tb1 As New TextBox()
        tb1.ID = "TextBox1Row_" & ctr

        tb1.Width = 80

        ' Add the control to the TableCell

        cell1.Controls.Add(tb1)
        '----------
        cell1.Controls.Add(dd)
        '------------------------
        ' Add the TableCell to the TableRow

        row.Cells.Add(cell1)

        ' Add the TableRow to the Table

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

    End Sub


    Protected Sub btnAdd_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnAdd.Click
        numOfColumns = 1

        'Generate the Table based from the inputs

        GenerateTable(numOfColumns)
    End Sub

End Class

Now how can I save entered data from these dynamic controls to a database?

Add new row to asp table on each button-Click

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