Web Forms :: DropDownList Not Redirecting To Page Using OnSelectedIndexChanged Event
Feb 7, 2011
I have a DropDownList that is supposed to redirect the user to a page when they change the selected index of the DropDownList. I have three parameters that are being passed by this redirecting. The first time the user changes the selectedindex, it does not work. but every time after that it works.
<asp:DropDownList ID="fiscal" runat="server" AutoPostBack="True"
DataSourceID="SqlDataSource3" DataTextField="fiscalno"
DataValueField="fiscalno" style="margin-left: 28px" Width="130px"
onselectedindexchanged="fiscal_SelectedIndexChanged" >
[Code]....
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Jan 26, 2011
How would I get the previous item on DropDownList before OnSelectedIndexChanged fires the event?
I had a DropDownList that has names as its items ("John", "Mark"). By default the SelectedIndex is "John". Upon changing its index and selecting "Mark" the event OnSelectedIndexChanged will be triggered. When I use ddlName.SelectedIndex it will return only the index for "Mark" which I want to get is the index of "John".
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Jun 30, 2010
this is my radio button list:
[code]....
this is the code behind:
[code]....
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Jan 18, 2010
I have a gridview where the dropdownlist is built during the RowDataBound event. I need to be able to poup a window based on the selection from the dropdownlist Items.
I cannot use Repsonse.Write("window.open('link');") coz i will need to redirect to the webpage which clears out the search on the page.
I need to be able to open a new window with the link and continue executing code on the page.
I have tried,
1) Page.ClientScript.RegisterStartupScript(Me.GetType(), "openwindow", "window.open('" & link & "');", True)
2) Dim s As System.Windows.Forms.HtmlWindow s.Document.Window.Open(link, "", "", False)
3) Process.Start(link) - this works locally but dosent on the testbox
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Dec 30, 2010
I have an application where I have a dropdownlist with AppendDataBoundItems set to true. This allows me to add a select all ListItem with a value of "-1". I store the selected value in a session so that the selected value is retained if a user navigates away from the page then returns. This works fine for all values except for when the value is set to the appenddatabound item (All). When I debug i can see that the onselectindexchanged event does not fire when the 'All' item is selected. If a user navigates away from the page and comes back this 'All' value is lost as it is not stored in the session.
find my code below:
<asp:DropDownList ID="ddlTeams" runat="server"
DataSourceID="odsTeams" DataTextField="Team_Name" cssClass="ddl"
DataValueField="TeamID" AutoPostBack="True" AppendDataBoundItems="True"
onselectedindexchanged="ddlTeams_SelectedIndexChanged">
[Code]....
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Aug 31, 2010
I would like to call a javascript function for
<asp:DropDownList ID="AutDrpDownList" runat="server" AutoPostBack="true" OnSelectedIndexChanged="AuthorityDrpDown_SelectedIndexChanged"> ...
I want to call a client side javascript method for validating some controls, before calling server side :
[Code]....
how to implement this. Before going to server itself, i need to perform validation .
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Apr 27, 2010
This is realy simple, basic functionality, but for some reason it's not working.
[Code]....
When I debug I notice that the event never is fired.
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Feb 2, 2014
I have a registration page I enter the details of the customers and redirect to another page for capturing photo and I come back to the registration page. I want to retain all the values i entered when i land on the registration page.
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Apr 4, 2011
I have a list of items in a GridView, with one column I'd like editable through a DropDownList.I do not wish to put the GridView into 'edit' mode or have any 'confirm/update/save' buttons.. I just want autopostback on the DDL, and an OnSelectedIndexChangedevent to update the row.Problem is, from my OnSelectedIndexChangedevent within the DDL, although I can see the new value to save, I can't discover the row to update from the GridView.Can anyone see how I can achieve what I wish? Other than perhaps storing the row id within the DDL? Maybe turn it around so the GridView's events are called?
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Jun 8, 2010
The OnSelectedIndexChanged event is not firing for my dropdown box. All forums I have looked at told me to add the AutoPostBack="true", but that didn't change the results.
HTML:
[code]....
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Aug 24, 2010
I have an asp.net page with a list box on it. Multiple event handlers subscribe to its OnSelectedIndexChanged event.
When I change the SelectedIndex programmatically none of the events get fired.
Now a hack for this is to call each event handler, but this has already caused bugs since people didn't know they had to do this when adding a new event handler.
I can do this in a Winforms app and even when SelectedIndex is changed in code the events fire.
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Jul 28, 2010
I have a repeater control bound to a dataset. Within that repeater I have several further controls one of which is a dropdownlist. I trap the OnSelectedIndexChanged event of that dropdownlist because I want to recalculate some figures presented on the same row within the repeater.
How do I reference other controls which are on the same row of the repeater as the dropdownlist ? Is there an index property or other mechanism whereby I can identify the "current" row?
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Nov 17, 2010
I have a panelA with a drop down list (ddl1) and a panelB with 2 dropdown lists (ddl2 and ddl3).
I am disabling PanelB in the page_Load section. When a selection has been made in the ddl1 in panelA, I am enabling panelB in OnSelectedIndexChanged event to enable ddl2 and ddl3.
This process is working, but as soon as I make a selection on ddl1, the whole page reloads to enable ddl2 and ddl3, which feels odd. How can I make it just reload panel3 not the whole page? I guess it can be done using AJAX update panel but as soon as I put <%@ Register Assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="ajaxtoolkit" %> and <asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>, I start getting wierd error: Microsoft JScript runtime error: Sys.ArgumentTypeException: Object of type 'Object' cannot be converted to type 'Array'.
Parameter name: array
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Apr 28, 2010
I have in my MasterPage a DropDownList that appears in all my Pages. I want it to run a specific code when user select another item in the list, but the event SelectedIndexChanged in the MasterPage doesn't work. How can I do to get this event working?
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May 7, 2015
I have a gridview and dropdownlist, let say the content of dropdownlist is YEAR and the content of gridview is Name and Year. Now for everytime I change the Value of dropdownlist the content of gridview will change but it will not load the page
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Feb 16, 2011
I have DropDownList, which has some options to choose from. Now after when user selects one of the options, it has to click on a button, which is a redirection on the same page:
protected void Button4_Click(object sender, EventArgs e)
{
Response.Redirect("Graphs.aspx?Selection=" + DropDownList1.SelectedValue + "&Date1=" + TextBox1.Text + "&Date2=" + TextBox2.Text);
}
I have to use redirection instead of postback, because I use flot which is javascript library and all the code has to be written again when user selects some other option. The problem is, when it redirects back, for some reason I can't make it to remember the value in the DropDownList, which has user previously selected. I tried this with this code:
protected void Page_Load(object sender, EventArgs e)
{
if (Request.QueryString["Selection"] == "TemperatureOUT")
{
DropDownList1.SelectedIndex = 0;
}
else if (Request.QueryString["Selection"] == "Dewpoint")
{
DropDownList1.SelectedIndex = 1;
}
}
The problem is, if for example user selects Dewpoint from DropDownList and then clicks on a button, which causes redirection, the new url should have:
Graphs.aspx?Selection=Dewpoint&...
but instead, it says:
Graphs.aspx?Selection=TemperatureOUT&...
Now if I remove that code from Page_Load it works, but it does not remember what has user selected before. Now I know that there has to be something with Page_Load. Isn't that when page is redirected, the Page_Load get's called, so it should look a the Selection value and print it out. So it has to be a problem with redirection, that for some reason does not set the selected value.
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Mar 20, 2010
i want to give id of dropdowncontrol inside master page, how can i assign this control id in trigger of updatepanel inside content page
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Mar 19, 2010
I have a page request with a QueryString, say [URL]. The page is displayed in a browser. Now there is an asp:LinkButton on the page which should enable the user to open the page without the QueryString (as if he had entered [URL] directly in the browser's address bar). I had two ideas:
1) Use the PostBackUrl attribute of the LinkButton:
<asp:LinkButton ID="LinkButton1" runat="server" Text="Select" PostBackUrl="~/Orders.aspx" />
2) Use "RedirectUrl" in an event handler:
<asp:LinkButton ID="LinkButton1" runat="server" Text="Select" OnClick="LinkButton1_Click" />
and
protected void LinkButton1_Click(object sender, EventArgs e) {
Response.Redirect("~/Orders.aspx"); }
In both cases the browser's address bar shows [URL] without the QueryString, as I like to have it. But in the first case the page does not change at all. But it should, because I'm evaluating the QueryString in code-behind and control the appearance of the page depending on whether a QueryString exists or not. The second option works as intended. If I am not wrong the second option requires an additional roundtrip:
Browser sends request to server
Event handler on server side sends Redirect URL to browser
Browser sends again request to the server, but with the new URL
Server sends new requested page to browser
Whereas the first option omits the first two steps in the list above, thus saving the additional roundtrip and resulting in: Browser sends request to the server, but with the new URL (the PostbackURL specified in the LinkButton) Server sends new requested page to browser. Do I really need this second roundtrip of option (2) to achieve what I want?
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Jul 22, 2010
I am using an asp Button the following way:
<asp:Button ID="ButtonSave" runat="server" Text="Save" OnClick="ButtonSave_Click" />
and the code of the handler looks something like this:
protected void ButtonSave_Click(object sender, EventArgs e)
{
Authenticate();
//some other code here
//redirect to certain page here
}
While debugging, I put a breakpoint at Authenticate, but it seems that it doesn't enter the function, although the redirection takes place and i don't do any more redirecting in the file only this one.
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Jan 15, 2010
need some info regarding button click. I want to send mail with autorespond mail on single button click. Within that waiting time I want a screen that will show "REDIRECTING" (like gmail) and will show a "thank you" page after successfully sending themail.
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
[code]....
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May 21, 2010
I am trying to redirect an ASPX Page to a Classic ASP Page, This is Working Fine with my Local IIS (version 5.1). OS is XPesponse.Redirect("xyz.asp?id=1234");I tried to deploy it into Windows server 2003, IIS Version 6.0 and i am getting an error"Page Cannot be Displayed. here is a problem with the page you are trying to reach and it cannot be displayed."
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May 7, 2010
This is driving me nuts, I cant figure out why the event OnClick doesn't fires when using a rewritten url (using URLRewritngNet).
Buttons lies everywhere on several pages and at the master page too.
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Nov 8, 2010
n the web page I need to print some content partly fetched from database to the user. The user can print all the reciepts of his basket or just print one reciept. what I do for now is that I redirect user to another page including datalists that fetched regarding info from database and then by clicking print it prints data. after that user shoud push back button to be redirected back to main page.But I want to do something on my page, that some how maybe pop up modals or flyouts or anything else, will be able to show data collected from database match with users basket, and let user click print and then print it. I need a solution on the same page not on the other page.
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Mar 17, 2013
protected void lblNVariz_Click(object sender, EventArgs e)
{
Session["Page"] = "~/Admin.aspx";
Response.Redirect("Admin/Bank-Data.aspx");
}
but when I click on link button it didn't redirect to Bank_data.aspx page it just refresh admin.aspx page
but when I change code Like below
protected void lblNVariz_Click(object sender, EventArgs e)
{
Response.Redirect("Admin/Bank-Data.aspx");
}
it redirect to Bank_data.aspx page.When I put session on it, it didn't worked...
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Nov 12, 2013
vs 2010, sql server 2008
I want login page code.my code is not working.
I have user table with username and password.
obj = new common();
con = new SqlConnection();
con = obj.getconnection();
SqlCommand cmd = new SqlCommand();
SqlDataReader rd;
cmd.Connection = con;
con.Open();
cmd.CommandText = "select username,password from user where username =@username and password=@password";
[CODE]..
when username and password is correct , it should redirect to default page.
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