how to get valus in dynamic added textbox

Question

i create run time control like this
Protected Sub RadioButtonList1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles RadioButtonList1.SelectedIndexChanged

        Dim index As Integer
        For index = 1 To RadioButtonList1.SelectedValue
          Dim name_tb As New TextBox()
            'validator
            Dim name_req As New RequiredFieldValidator

            name_tb.ID = "name_tb" & index
            name_req.ID = "name_req" & index
            name_tb.TextMode = TextBoxMode.SingleLine
tabelcell.Controls.Add(name_tb)
'tabelcell add in trow
'trow then added in htmltable
div.Controls.Add(htmltable)
Me.PlaceHolder1.Controls.Add(div)
next
I need to get textbox text when i click on submitt button on form.
Thanks

Madhu K · Answer

try to check cell.Controls.Count to get the number of controls. If there aren´t any then there is the problem. For Each textbox As System.Web.UI.Control In cell.Controls.Count Dim tbox As TextBox = CType(textbox System.Web.UI.WebControls.TextBox)

erum mirza · Answer

let me update about the post  i some how got succeed about the problem have a look on code behind submit button dim plholder As PlaceHolder = DirectCast(FindControl(PlaceHolder1) PlaceHolder) For Each div As System.Web.UI.Control In plholder.Controls If div.[GetType]().Name = HtmlGenericControl Then Dim hml As HtmlGenericControl = DirectCast(div HtmlGenericControl) Dim str12 As String str12 = hml.TagName str12 = hml.ID For Each table As System.Web.UI.Control In div.Controls If table.[GetType]().Name = HtmlTable Then Dim htab As HtmlTable = DirectCast(table HtmlTable) Dim str13 As String str13 = htab.TagName str13 = htab.ID For Each row As System.Web.UI.Control In table.Controls Dim hrow As HtmlTableRow = DirectCast(row HtmlTableRow) Dim str14 As String str14 = hrow.TagName str14 = hrow.ID For Each cell As System.Web.UI.Control In row.Controls Dim hcell As HtmlTableCell = DirectCast(cell HtmlTableCell) Dim str15 As String str15 = hcell.TagName str15 = hcell.ID For Each textbox As System.Web.UI.Control In cell.Controls Dim tbox As TextBox = CType(textbox System.Web.UI.WebControls.TextBox) Dim str16 As String str16 = tbox.TextMode str16 = tbox.ID Next 'textbox Next 'cell Next 'row End If Next 'table 'here you can access inner controls of html 'If str12.ToLower() = div Then ' Response.Write(str12) ' 'Else If 'End If End If next but i m getting an error Unable to cast object of type 'System.Web.UI.LiteralControl' to type 'System.Web.UI.WebControls.TextBox'. on line Dim tbox As TextBox = CType(textbox System.Web.UI.WebControls.TextBox) in above code

Madhu K · Answer

Heres the problem have a look http://forums.asp.net/t/1186195.aspx

erum mirza · Answer

see the link http://www.gfln.org/Regsiteration.aspx and click on radio button from1 to 7 which created that div dynamically depends upon user select which radio button select and on submitt button i need to get teh value of that div

Madhu K · Answer

Make sure that radio button selected index changed event is called before the submit button click event if not the div is not added to the place holder and hence you get the error.

erum mirza · Answer

here is the code where i added div in place holder Protected Sub RadioButtonList1_SelectedIndexChanged( ByVal sender As Object  ByVal e As System.EventArgs) Handles RadioButtonList1.SelectedIndexChanged Dim index As Integer For index = 1 To RadioButtonList1.SelectedValue Dim newdiv As New HtmlGenericControl( div ) newdiv.ID = mydiv 'newdiv.Attributes.Add(id mydiv) newdiv.EnableViewState = True Dim ht As New HtmlTable() ht.ID = mytable & index.ToString() ht.EnableViewState = True ht.Width = 100% ht.CellSpacing = 0 ht.CellPadding = 0 ht.Border = 0 Dim htr htr1 htr2 As New HtmlTableRow() Dim cell htc htc1 htc2 htc3 htc4 htc5 htc6 htc7 htc8 As New HtmlTableCell() Dim name_tb As New TextBox() Dim sal_ddl As New DropDownList 'validator Dim name_req As New RequiredFieldValidator Dim tel_req As New RequiredFieldValidator Dim email_req As New RequiredFieldValidator name_tb.ID = name_tb & index sal_ddl.ID = sal_ddl & index name_req.ID = name_req & index tel_req.ID = tel_req & index email_req.ID = email_req & index name_tb.EnableViewState = True sal_ddl.EnableViewState = True tel_req.EnableViewState = True sal_ddl.Items.Add( MR ) sal_ddl.Items.Add( Ms ) sal_ddl.Items.Add( Mrs ) Dim Tel_tb1 As New TextBox Tel_tb1.ID = Tel_tb1 & index Tel_tb1.EnableViewState = True name_tb.TextMode = TextBoxMode.SingleLine Dim email_tb1 As New TextBox email_tb1.ID = email_tb1 & index email_tb1.TextMode = TextBoxMode.SingleLine htc.InnerText = Name :  htc.Width = 20% htc.Align = Left htc1.Controls.Add(sal_ddl) htc1.Width = 10% htc2.Width = 70% htc2.Align = left htc2.Controls.Add(name_tb) htc2.Controls.Add(name_req) htr.Controls.Add(htc) htr.Controls.Add(htc1) htr.Controls.Add(htc2) ht.Controls.Add(htr) name_req.ControlToValidate = name_tb & index name_req.Display = ValidatorDisplay.Dynamic name_req.ErrorMessage = ( Please Enter name of attendenes ) 'make 2nd row htc3.InnerText = Telephone :  htc3.Width = 20% htc3.Align = Left htc4.InnerHtml =   htc4.Width = 10% htc5.Width = 70% htc5.Align = left htc5.Controls.Add(Tel_tb1) htc5.Controls.Add(tel_req) htr1.Controls.Add(htc3) htr1.Controls.Add(htc4) htr1.Controls.Add(htc5) ht.Controls.Add(htr1) tel_req.ControlToValidate = Tel_tb1 & index tel_req.Display = ValidatorDisplay.Dynamic tel_req.ErrorMessage = ( Please Enter Phone ) 'make 3rd row htc6.InnerText = Email :  htc6.Width = 20% htc6.Align = Left htc7.InnerHtml =   htc7.Width = 10% htc8.Width = 70% htc8.Align = left htc8.Controls.Add(email_tb1) htc8.Controls.Add(email_req) htr2.Controls.Add(htc6) htr2.Controls.Add(htc7) htr2.Controls.Add(htc8) ht.Controls.Add(htr2) email_req.ControlToValidate = email_tb1 & index email_req.Display = ValidatorDisplay.Dynamic email_req.ErrorMessage = ( Please Enter Email ) 'Add a blank rows cell.ColSpan = 3 cell.InnerHtml =   Dim row As New HtmlTableRow row.Cells.Add(cell) ht.Rows.Add(row) newdiv.Controls.Add(ht) newdiv.Attributes.Add( table  ht ) newdiv.Attributes.Add( Style  border-bottom :#ccc solid 0px ) newdiv.Attributes.Add( style  height:23px ) newdiv.Attributes.Add( style  padding-left:20px ) Me .PlaceHolder1.Controls.Add(newdiv) PlaceHolder1.EnableViewState = True Next 'End Sub End Sub and here is the code behind submiit button where i want to retrive the div For index = 1 To RadioButtonList1.SelectedValue Dim plholder As PlaceHolder = DirectCast (FindControl( PlaceHolder1 ) PlaceHolder) 'Dim name_tb As TextBox = DirectCast(plholder.FindControl(name_tb & index.ToString()) TextBox) Dim newdiv As HtmlGenericControl = DirectCast (FindControl( mydiv ) HtmlGenericControl) Response.Write(newdiv.ID) Next

Madhu K · Answer

Add the div to the place holder before finding it.

erum mirza · Answer

i m getting object reference not set to insatnce of an object i have code like this while adding div Dim newdiv As New HtmlGenericControl( div ) newdiv.ID = mydiv and while getting i have Dim plholder As PlaceHolder = DirectCast (FindControl( PlaceHolder1 ) PlaceHolder) //work fine Dim newdiv As HtmlGenericControl = DirectCast (FindControl( mydiv ) HtmlGenericControl) Response.Write(newdiv.ID) //this gives above mentioned exception any help

Madhu K · Answer

Converted from c# to Vb.. HtmlGenericControl div = new HtmlGenericControl(div); div.ID = div12; plcDiv.Controls.Add(div); //Button click event Dim div As HtmlGenericControl = DirectCast(FindControl(div12) HtmlGenericControl) div.InnerText = test test

erum mirza · Answer

thanks for ur reply no u r not getting it i already set divplaceholder etc etc on radio buttonlist clicki just need to recall it .menas need to get it. now for example i got placeholder like this way Dim plholder As PlaceHolder = DirectCast (FindControl( PlaceHolder1 ) PlaceHolder) but what about div??

Madhu K · Answer

Public div As HtmlGenericControl Protected Sub Page_Load(sender As Object e As EventArgs) div = New HtmlGenericControl(div) div.ID = myID plcDiv.Controls.Add(div) End Sub Protected Sub Button1_Click(sender As Object e As EventArgs) div.InnerHtml = test succeed End Sub

erum mirza · Answer

well sam thanks for ur reply but my hierachray is like that placeholder divhtmltablerowtablecell textbox right now i m facing problem with how to find div dynamically added in placeholder i added it Dim newdiv As New HtmlGenericControl( div ) Me .PlaceHolder1.Controls.Add(newdiv) i need to find it on submitt button

Sam Hobbs · Answer

You need to add an event handler for the submit buttton's click event. Also you need to fix the numerous syntax errors in your code; the C# compiler will choke on it.