Asp DropDownList

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  • Miguel Dias Moura
    #1

    Asp DropDownList

    Hello,

    I have two questions concerning Asp:DropDownLis t

    1. How to fill a DropDownList from runtime and set its default item?

    2. How do use a DropDownList in each datagrid record?
    All dropdownlist should be filled with the values in field NAME from
    the same dataset used in the datagrid.
    The default value of each dropdownlist should be the value of NAME by
    that record.

    Thanks,
    Miguel

    Tags: None
    • Ken Cox
      #2
      Re: Asp DropDownList

      Hi Miguel,

      Here's a way to add a dropdownlistbox to a grid and select the corresponding
      item.

      Filling the dropdown could be much more efficient, but this gives you the
      idea.

      Let us know if this helps?

      Ken
      Microsoft MVP [ASP.NET]


      <%@ Page Language="VB" %>
      <%@ import Namespace="syst em.data" %>

      <script runat="server">
      Private Sub Page_Load _
      (ByVal sender As System.Object, _
      ByVal e As System.EventArg s) _
      Handles MyBase.Load
      If Not IsPostBack Then
      DataGrid1.DataS ource = CreateDataSourc e()
      DataGrid1.DataB ind()
      End If

      End Sub
      Private Sub DataGrid1_ItemD ataBound(ByVal sender As Object, _
      ByVal e As System.Web.UI.W ebControls.Data GridItemEventAr gs) _
      Handles DataGrid1.ItemD ataBound
      If (e.Item.ItemTyp e = ListItemType.Al ternatingItem) _
      Or (e.Item.ItemTyp e = ListItemType.It em) Then
      Dim DRV As DataRowView = CType(e.Item.Da taItem, DataRowView)
      Dim itemID As String = DRV("CatID")
      Dim DropDownList1 As DropDownList =
      e.Item.FindCont rol("DropDownLi st1")
      Dim item As ListItem
      DropDownList1.D ataSource = CreateDataSourc e()
      DropDownList1.D ataTextField = "CatName"
      DropDownList1.D ataValueField = "CatID"
      DropDownList1.D ataBind()
      item = DropDownList1.I tems.FindByValu e(itemID)
      If Not item Is Nothing Then item.Selected = True
      End If
      End Sub

      Function CreateDataSourc e() As DataTable
      Dim dt As New DataTable
      Dim dr As DataRow
      dt.Columns.Add( New DataColumn _
      ("CatID", GetType(Int32)) )
      dt.Columns.Add( New DataColumn _
      ("CatName", GetType(String) ))
      dt.Columns.Add( New DataColumn _
      ("CurrencyValue ", GetType(Double) ))
      dt.Columns.Add( New DataColumn _
      ("Boolean", GetType(Boolean )))
      Dim i As Integer
      For i = 0 To 8
      dr = dt.NewRow()
      dr(0) = i
      dr(1) = "Item " + i.ToString()
      dr(2) = 1.23 * (i + 1)
      dr(3) = (i = 4)
      dt.Rows.Add(dr)
      Next i
      Return dt
      End Function 'CreateDataSour ce



      </script>

      <html >
      <head runat="server">
      <title>Untitl ed Page</title>
      </head>
      <body>
      <form id="form1" runat="server">
      <div>

      <asp:DataGrid ID=DataGrid1 runat=server>
      <Columns>
      <asp:TemplateCo lumn HeaderText="DDL ">
      <ItemTemplate >
      <asp:DropDownLi st ID="DropDownLis t1" runat="server">
      </asp:DropDownLis t>
      </ItemTemplate>

      </asp:TemplateCol umn>
      </Columns>
      </asp:DataGrid>
      </div>
      </form>
      </body>
      </html>

      "Miguel Dias Moura" <mdmoura*NOSPAM *@gmail.*DELETE 2SEND*com> wrote in
      message news:OgybhYH8FH A.1188@TK2MSFTN GP12.phx.gbl...[color=blue]
      > Hello,
      >
      > I have two questions concerning Asp:DropDownLis t
      >
      > 1. How to fill a DropDownList from runtime and set its default item?
      >
      > 2. How do use a DropDownList in each datagrid record?
      > All dropdownlist should be filled with the values in field NAME from the
      > same dataset used in the datagrid.
      > The default value of each dropdownlist should be the value of NAME by
      > that record.
      >
      > Thanks,
      > Miguel
      >[/color]


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