Retrieve value from dynamic textbox in dynamic templatefield in gridview

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How to retrieve dynamically-created-textbox text inside dynamic template field of a gridview? Here's my code.

------------------------------------HTML ------------------------------

XML

<div>
    <table>
        <tr>
            <td>
                No of Rows:
            </td>
            <td>
                <asp:TextBox ID="txtNumber" runat="server" ValidationGroup="vgNumbers">

                </asp:TextBox>
            </td>
            <td>
                <asp:Button ID="btnPopulate" runat="server" Text="Populate" ValidationGroup="vgNumbers" />
            </td>
        </tr>
        <tr>
            <td align="center" colspan="3">
                <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False">
                    <HeaderStyle ForeColor="White" BackColor="DarkSlateGray" />
                </asp:GridView>
            </td>
        </tr>
        <tr>
            <td colspan="3">
                <asp:Button ID="btnViewData" runat="server" Text="View Data" Visible="false" />
                <br />
                <br />
                <asp:Label ID="Label1" runat="server"></asp:Label>
            </td>
        </tr>
    </table>
</div>

------------------------------------CODE BEHIND ------------------------------

VB

Protected Sub btnPopulate_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnPopulate.Click

      Me.GridView1.Controls.Clear()
      PopulateGrid()

  End Sub

  Public Sub PopulateGrid()

      Dim tf As New TemplateField()
      tf.HeaderText = "Header"
      GridView1.Columns.Add(tf)

      GridView1.DataSource = GetmyDataTable(CInt(txtNumber.Text))
      GridView1.DataBind()

      btnViewData.Visible = True

  End Sub

  Public Function GetmyDataTable(ByVal intNumber As Int32) As DataTable
      Dim datatable As New DataTable()
      Dim dataRow As DataRow = Nothing

      For i As Integer = 0 To intNumber - 1
          dataRow = datatable.NewRow()

          datatable.Rows.Add(dataRow)

          datatable.AcceptChanges()

      Next

      datatable.AcceptChanges()

      Return datatable
  End Function

  Protected Sub btnAddtoDB_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnViewData.Click

      For i As Integer = 0 To GridView1.Rows.Count - 1
          Dim myNames As New TextBox
          myNames = CType(GridView1.Rows(i).FindControl("txtName"), TextBox)

          Label1.Text += Environment.NewLine & myNames.Text

      Next


      txtNumber.Text = ""

  End Sub

  Private Sub GridView1_RowDataBound(sender As Object, e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound
      If e.Row.RowType = DataControlRowType.DataRow Then
          For i As Integer = 0 To e.Row.Cells.Count - 1
              Dim txt As New TextBox
              txt.ID = "txtName" & e.Row.RowIndex & "_" & i

              txt.Width = 60
              txt.BackColor = ColorTranslator.FromHtml("#C6E2FF")
              txt.BorderColor = Color.Black
              txt.BorderStyle = BorderStyle.Solid
              txt.BorderWidth = 1

              e.Row.Cells(i).Controls.Add(txt)
          Next
      End If

  End Sub

Posted 13-Apr-15 21:45pm

snamyna

Updated 13-Apr-15 21:49pm

v3

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snamyna · Accepted Answer · 2015-04-14T21:58:00

I have solved this by using Request.Form(key) in PreInit function.

VB

Protected Sub Page_PreInit(sender As Object, e As EventArgs) Handles Me.PreInit

       Dim keys As List(Of String) = Request.Form.AllKeys.Where(Function(key) key.Contains("txtName")).ToList()
       Dim i As Integer = 1
       For Each key As String In keys

           Dim txt As String = Request.Form(key)
           Label1.Text += Environment.NewLine & txt

           i += 1
       Next
   End Sub