| Home | Forums | Reviews | Guides | Newsgroups | Register | Search |
 |
| Thread Tools |
|
Guest
Posts: n/a
|
Hi,
I have a problem with postback. When the page is postbacked, i want the second dropdownlist to be visible if the selectedvalue of the first one ="y". With this code, it remains invisible. What do i wrong here? Thanks David <asp  ropDownList ID="DropDownList1" runat="server" AutoPostBack=true><asp:ListItem>x</asp:ListItem> <asp:ListItem>y</asp:ListItem> </asp ropDownList><br /> <br /> <asp ropDownList ID="DropDownList2" runat="server" AutoPostBack=true Visible=false> <asp:ListItem>1</asp:ListItem> <asp:ListItem>2</asp:ListItem> </asp ropDownList>Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load If Page.IsPostBack Then If DropDownList1.SelectedValue = "y" Then DropDownList2.Visible = True End if End If End Sub |
|
|
|
|||
|
|
| |
|
Guest
Posts: n/a
|
why not just put that logic in the SelectedIndexchanged event, making the
2nd ddl invisible by default.? David Wier http://aspnet101.com http://iWritePro.com - One click PDF, convert .doc/.rtf/.txt to HTML with no bloated markup "David" <> wrote in message news:... > Hi, > > I have a problem with postback. When the page is postbacked, i want the > second dropdownlist to be visible if the selectedvalue of the first one > ="y". > With this code, it remains invisible. What do i wrong here? > Thanks > David > > <asp ropDownList ID="DropDownList1" runat="server" AutoPostBack=true>> <asp:ListItem>x</asp:ListItem> > <asp:ListItem>y</asp:ListItem> > </asp ropDownList>> > <br /> <br /> > <asp ropDownList ID="DropDownList2" runat="server" > AutoPostBack=true Visible=false> > <asp:ListItem>1</asp:ListItem> > <asp:ListItem>2</asp:ListItem> > </asp ropDownList>> > Protected Sub Page_Load(ByVal sender As Object, ByVal e As > System.EventArgs) Handles Me.Load > If Page.IsPostBack Then > If DropDownList1.SelectedValue = "y" Then > DropDownList2.Visible = True > End if > End If > End Sub > > > > |
|
|
|
|
|||
|
|
| |
|
Guest
Posts: n/a
|
Thanks for replying.
I tried the code within this: Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles DropDownList1.SelectedIndexChanged .... End Sub but ddl2 still invisible. I don't understand why the Page.IsPostBack doesn't work ... "David Wier" <> schreef in bericht news:edEwc%... > why not just put that logic in the SelectedIndexchanged event, making the > 2nd ddl invisible by default.? > > David Wier > http://aspnet101.com > http://iWritePro.com - One click PDF, convert .doc/.rtf/.txt to HTML with > no bloated markup > > > "David" <> wrote in message > news:... >> Hi, >> >> I have a problem with postback. When the page is postbacked, i want the >> second dropdownlist to be visible if the selectedvalue of the first one >> ="y". >> With this code, it remains invisible. What do i wrong here? >> Thanks >> David >> >> <asp ropDownList ID="DropDownList1" runat="server" AutoPostBack=true>>> <asp:ListItem>x</asp:ListItem> >> <asp:ListItem>y</asp:ListItem> >> </asp ropDownList>>> >> <br /> <br /> >> <asp ropDownList ID="DropDownList2" runat="server" >> AutoPostBack=true Visible=false> >> <asp:ListItem>1</asp:ListItem> >> <asp:ListItem>2</asp:ListItem> >> </asp ropDownList>>> >> Protected Sub Page_Load(ByVal sender As Object, ByVal e As >> System.EventArgs) Handles Me.Load >> If Page.IsPostBack Then >> If DropDownList1.SelectedValue = "y" Then >> DropDownList2.Visible = True >> End if >> End If >> End Sub >> >> >> >> > > |
|
|
|
|
|||
|
Guest
Posts: n/a
|
I just tried this:
Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles DropDownList1.SelectedIndexChanged If DropDownList1.SelectedValue = "y" Then DropDownList2.Visible = "True" End Sub and it worked fine for me David Wier http://aspnet101.com http://iWritePro.com - One click PDF, convert .doc/.rtf/.txt to HTML with no bloated markup "David" <> wrote in message news:... > Thanks for replying. > I tried the code within this: > Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, > ByVal e As System.EventArgs) Handles DropDownList1.SelectedIndexChanged > ... > End Sub > > but ddl2 still invisible. > I don't understand why the Page.IsPostBack doesn't work ... > > > "David Wier" <> schreef in bericht > news:edEwc%... >> why not just put that logic in the SelectedIndexchanged event, making the >> 2nd ddl invisible by default.? >> >> David Wier >> http://aspnet101.com >> http://iWritePro.com - One click PDF, convert .doc/.rtf/.txt to HTML with >> no bloated markup >> >> >> "David" <> wrote in message >> news:... >>> Hi, >>> >>> I have a problem with postback. When the page is postbacked, i want the >>> second dropdownlist to be visible if the selectedvalue of the first one >>> ="y". >>> With this code, it remains invisible. What do i wrong here? >>> Thanks >>> David >>> >>> <asp ropDownList ID="DropDownList1" runat="server" AutoPostBack=true>>>> <asp:ListItem>x</asp:ListItem> >>> <asp:ListItem>y</asp:ListItem> >>> </asp ropDownList>>>> >>> <br /> <br /> >>> <asp ropDownList ID="DropDownList2" runat="server" >>> AutoPostBack=true Visible=false> >>> <asp:ListItem>1</asp:ListItem> >>> <asp:ListItem>2</asp:ListItem> >>> </asp ropDownList>>>> >>> Protected Sub Page_Load(ByVal sender As Object, ByVal e As >>> System.EventArgs) Handles Me.Load >>> If Page.IsPostBack Then >>> If DropDownList1.SelectedValue = "y" Then >>> DropDownList2.Visible = True >>> End if >>> End If >>> End Sub >>> >>> >>> >>> >> >> > > |
|
|
|
|
|||
|
Guest
Posts: n/a
|
In order to check the AutoPostBack only, i reduced the code to this:
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label><br /><br /> <asp ropDownList ID="DropDownList1" runat="server" AutoPostBack=true ><asp:ListItem>x</asp:ListItem> <asp:ListItem>y</asp:ListItem> </asp ropDownList>Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load If Page.IsPostBack Then Label1.Text = "ok" End If End Sub But after having chosen a value in the DDL, the label.text never becomes "ok". So AutoPostBack doesn't work??? Or i forget to set a parameter or an option in web.config or ...? "David Wier" <> schreef in bericht news:%... >I just tried this: > > Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, > ByVal e As System.EventArgs) Handles DropDownList1.SelectedIndexChanged > If DropDownList1.SelectedValue = "y" Then DropDownList2.Visible = "True" > End Sub > > and it worked fine for me > > David Wier > http://aspnet101.com > http://iWritePro.com - One click PDF, convert .doc/.rtf/.txt to HTML with > no bloated markup > > > "David" <> wrote in message > news:... >> Thanks for replying. >> I tried the code within this: >> Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, >> ByVal e As System.EventArgs) Handles DropDownList1.SelectedIndexChanged >> ... >> End Sub >> >> but ddl2 still invisible. >> I don't understand why the Page.IsPostBack doesn't work ... >> >> >> "David Wier" <> schreef in bericht >> news:edEwc%... >>> why not just put that logic in the SelectedIndexchanged event, making >>> the 2nd ddl invisible by default.? >>> >>> David Wier >>> http://aspnet101.com >>> http://iWritePro.com - One click PDF, convert .doc/.rtf/.txt to HTML >>> with no bloated markup >>> >>> >>> "David" <> wrote in message >>> news:... >>>> Hi, >>>> >>>> I have a problem with postback. When the page is postbacked, i want the >>>> second dropdownlist to be visible if the selectedvalue of the first one >>>> ="y". >>>> With this code, it remains invisible. What do i wrong here? >>>> Thanks >>>> David >>>> >>>> <asp ropDownList ID="DropDownList1" runat="server" AutoPostBack=true>>>>> <asp:ListItem>x</asp:ListItem> >>>> <asp:ListItem>y</asp:ListItem> >>>> </asp ropDownList>>>>> >>>> <br /> <br /> >>>> <asp ropDownList ID="DropDownList2" runat="server" >>>> AutoPostBack=true Visible=false> >>>> <asp:ListItem>1</asp:ListItem> >>>> <asp:ListItem>2</asp:ListItem> >>>> </asp ropDownList>>>>> >>>> Protected Sub Page_Load(ByVal sender As Object, ByVal e As >>>> System.EventArgs) Handles Me.Load >>>> If Page.IsPostBack Then >>>> If DropDownList1.SelectedValue = "y" Then >>>> DropDownList2.Visible = True >>>> End if >>>> End If >>>> End Sub >>>> >>>> >>>> >>>> >>> >>> >> >> > > |
|
|
|
|
|||
|
Guest
Posts: n/a
|
I have just tested the reduced code with Cassini (included in VWD 200
 and .... it works. But when i try it with the normal browser IE 7 (with IIS), it doesn't ... "David Wier" <> schreef in bericht news:%... >I just tried this: > > Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, > ByVal e As System.EventArgs) Handles DropDownList1.SelectedIndexChanged > If DropDownList1.SelectedValue = "y" Then DropDownList2.Visible = "True" > End Sub > > and it worked fine for me > > David Wier > http://aspnet101.com > http://iWritePro.com - One click PDF, convert .doc/.rtf/.txt to HTML with > no bloated markup > > > "David" <> wrote in message > news:... >> Thanks for replying. >> I tried the code within this: >> Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, >> ByVal e As System.EventArgs) Handles DropDownList1.SelectedIndexChanged >> ... >> End Sub >> >> but ddl2 still invisible. >> I don't understand why the Page.IsPostBack doesn't work ... >> >> >> "David Wier" <> schreef in bericht >> news:edEwc%... >>> why not just put that logic in the SelectedIndexchanged event, making >>> the 2nd ddl invisible by default.? >>> >>> David Wier >>> http://aspnet101.com >>> http://iWritePro.com - One click PDF, convert .doc/.rtf/.txt to HTML >>> with no bloated markup >>> >>> >>> "David" <> wrote in message >>> news:... >>>> Hi, >>>> >>>> I have a problem with postback. When the page is postbacked, i want the >>>> second dropdownlist to be visible if the selectedvalue of the first one >>>> ="y". >>>> With this code, it remains invisible. What do i wrong here? >>>> Thanks >>>> David >>>> >>>> <asp ropDownList ID="DropDownList1" runat="server" AutoPostBack=true>>>>> <asp:ListItem>x</asp:ListItem> >>>> <asp:ListItem>y</asp:ListItem> >>>> </asp ropDownList>>>>> >>>> <br /> <br /> >>>> <asp ropDownList ID="DropDownList2" runat="server" >>>> AutoPostBack=true Visible=false> >>>> <asp:ListItem>1</asp:ListItem> >>>> <asp:ListItem>2</asp:ListItem> >>>> </asp ropDownList>>>>> >>>> Protected Sub Page_Load(ByVal sender As Object, ByVal e As >>>> System.EventArgs) Handles Me.Load >>>> If Page.IsPostBack Then >>>> If DropDownList1.SelectedValue = "y" Then >>>> DropDownList2.Visible = True >>>> End if >>>> End If >>>> End Sub >>>> >>>> >>>> >>>> >>> >>> >> >> > > |
|
|
|
|
|||
|
Guest
Posts: n/a
|
Ok, i began it from the beginning and now it works. Strange ...
"David Wier" <> schreef in bericht news:%... >I just tried this: > > Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, > ByVal e As System.EventArgs) Handles DropDownList1.SelectedIndexChanged > If DropDownList1.SelectedValue = "y" Then DropDownList2.Visible = "True" > End Sub > > and it worked fine for me > > David Wier > http://aspnet101.com > http://iWritePro.com - One click PDF, convert .doc/.rtf/.txt to HTML with > no bloated markup > > > "David" <> wrote in message > news:... >> Thanks for replying. >> I tried the code within this: >> Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, >> ByVal e As System.EventArgs) Handles DropDownList1.SelectedIndexChanged >> ... >> End Sub >> >> but ddl2 still invisible. >> I don't understand why the Page.IsPostBack doesn't work ... >> >> >> "David Wier" <> schreef in bericht >> news:edEwc%... >>> why not just put that logic in the SelectedIndexchanged event, making >>> the 2nd ddl invisible by default.? >>> >>> David Wier >>> http://aspnet101.com >>> http://iWritePro.com - One click PDF, convert .doc/.rtf/.txt to HTML >>> with no bloated markup >>> >>> >>> "David" <> wrote in message >>> news:... >>>> Hi, >>>> >>>> I have a problem with postback. When the page is postbacked, i want the >>>> second dropdownlist to be visible if the selectedvalue of the first one >>>> ="y". >>>> With this code, it remains invisible. What do i wrong here? >>>> Thanks >>>> David >>>> >>>> <asp ropDownList ID="DropDownList1" runat="server" AutoPostBack=true>>>>> <asp:ListItem>x</asp:ListItem> >>>> <asp:ListItem>y</asp:ListItem> >>>> </asp ropDownList>>>>> >>>> <br /> <br /> >>>> <asp ropDownList ID="DropDownList2" runat="server" >>>> AutoPostBack=true Visible=false> >>>> <asp:ListItem>1</asp:ListItem> >>>> <asp:ListItem>2</asp:ListItem> >>>> </asp ropDownList>>>>> >>>> Protected Sub Page_Load(ByVal sender As Object, ByVal e As >>>> System.EventArgs) Handles Me.Load >>>> If Page.IsPostBack Then >>>> If DropDownList1.SelectedValue = "y" Then >>>> DropDownList2.Visible = True >>>> End if >>>> End If >>>> End Sub >>>> >>>> >>>> >>>> >>> >>> >> >> > > |
|
|
|
|
|||
|
|
| |
|
| Thread Tools | |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| Using callback, I fill dorpdownlist without postback but it gets empty when a postback is executed | Fabio Mastria | ASP .Net | 5 | 01-30-2008 09:07 PM |
| ShowDialogModal postback on close (this is not related to multiple dialogs opening upon postback) | Jacky Chau | ASP .Net | 2 | 06-08-2005 05:49 PM |
| Can I raise a postback ? Session variable only visible after postback. Please help | gce | ASP .Net | 2 | 05-08-2005 05:55 AM |
| Postback not being set to True on first postback | =?Utf-8?B?Q2hhZA==?= | ASP .Net | 2 | 04-04-2005 06:17 PM |
| effecting postback without auto postback controls | Psych971 | ASP .Net | 5 | 12-17-2004 08:53 PM |
