I have a dropdownlist, who's items I bind from the codebehind file of an asp.net web page. After databinding, I want to set the selected index as the last item in the list, thus:
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However, this does not work. When the page is done loading, the selected index is still zero.
how do I set the SelectedIndex of a DropDownList based on the SelectedValue
View 8 RepliesI wanted to create a dropdownlist that would trigger an asynchronous postback and update the Gridview inside the Updatepanel. However, no matter what I do, when the dropdownlist changes, nothing in the UpdatePanel will change, even the TestLabel....I've been banging my head against the walls for days on this -- why won't this work? When I remove the UpdatePanel code and triggers, all the code works, eg, you change the dropdownlist andthen gridview updates -- but it refreshes the page and this is why I wanted to put the Gridview inside an Updatepanel to make it look cleaner.[Code]....
View 9 RepliesI'm having trouble binding my textbox to my dropdownlist. I got it to work but I don't think it is the correct way of doing it. I have my DDL bound to a datasource and populating everything correctly. However, I couldn't find a better way of binding my textbox to it besides using the FormView control and its counterpart, Templates (edit,insert,etc) It looks messy and i was hoping there was a better way of doing it. I've researched it online for awhile now but I couldn't understand how to implement for my situation.
My DDL has company names in it and the datasource has all the information from the table including what I'm trying to have my textbox pull (Address).
I have dropDownList in EditItemTemplate in DataList which is used to choose value from possible ones.
To display cuurent value I used SelectedIndex='<%# (int)(QuestionType)Eval("Type") %>' inside he dropDownList.
But then I started to dataBind dropDownList dynamically and it stopped working...
Why? When does the code in SelectedIndex='<%# this code %>' works?
LinQ / DropDownList gives error on selectedindex
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I have a datalist where each item consists of a textbox and a dropdownlist. I want to get the datakey value when a selected dropdownlist item changes. I can get the selected value of the dropdownlist, but I can't figure out how to get the key field value of the datalist row item that the dropdown resides in.
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I am generating Dropdownlists to each row that I get of a database table and then bind them to an asp table.
I am doing the paging of the asp table myself. I'm just adding the rows regarding to the page.
Example: Page 2 (10 rows) => Rows 11 -20
The problem is, when I click a next button to get to the next page. The selectedindex of dropdownlists on the next page are getting overwritten.
I am loading the table in the page_load.
Here is some code of page_load[Code]....
And this is my load_table:
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I am trying to use Yes No Confirmation Message Box but the code below here which i found here uses a button to raise the confirmation message box but what i would like to use is a DropDown. How can i modify the code and i use drop-down box instead of using a button? here is the javascript code:
<script type = "text/javascript">
function Confirm() {
var confirm_value = document.createElement("INPUT");
confirm_value.type = "hidden";
confirm_value.name = "confirm_value";
[code]....
but here is what i would like to use is drop-down instead of the button:
<div>
<asp:DropDownList ID="ddl" Width="300px" runat="server" AppendDataBoundItems="true" OnSelectedIndexChanged="ddl_SelectedIndexChanged">
<asp:ListItem Text="test1" Value="test1"></asp:ListItem>
<asp:ListItem Text="test2" Value="test2"></asp:ListItem>
<asp:ListItem Text="test3" Value="test3"></asp:ListItem>
</asp:DropDownList>
</div>
Is this possible? I programatically change the selected index when a certain event is fired using this code:DropDownList.SelectedIndex = DropDownList.SelectedIndex + 1ow I want to update a corresponding textbox with the text that is in the new SelectedIndex of the DropDownList via postback.I know how I can do this in javascript
View 1 RepliesI have 3 security question drop down menus. I have javascript on the ASPX page that removes questions/repopulates them when you select a questions (so you cannot reselect the questions in the other 2 boxes). This works wonderfully when a user is editing their profile with already selected questions. However, when a user first selects the questions where all three boxes are listing "select a question" at selectedIndex 0, the onChange doesn't fire. The function won't even go. I think this has a big something to do with the on change from selected index of 0. I have debugged this thing and it doesn't even enter the function. I even set the onchange action to flash an alert. It just seems something is going wrong when i try to action onchange from selected index of 0.
View 2 RepliesI have a DropDownList in a DetailsView, which binds a user's 'AllocatedUser' to a user in the Users table. Occasionally, we'll have some mishaps in the database where the user allocated isn't in the users table, which the DropDownList is filled with. In this case the site crashes and we get a 'SelectedValue does not exist in the list of items error'.What I want to do is catch any binding errors like that, and just set the DropDownList index to 0. I've tried something like this:
OnDataBinding='DoesExist("AllocatedUser",<%#Bind("AllocatedUser")%>)'
but it doesn't like the syntax of that.
I have a repeater with a DropDownList in it. I set the datasource of this list in the itembound event en set the selectedindex. When I debug the selectedindex is set, but when the page is done loading for all the item the default item is selected.
protected void Repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
var ddl = (DropDownList)e.Item.FindControl("DataFeedItems");
ddl.DataSource = FilterDropDownData();
ddl.DataTextField = "ColumnName";
ddl.DataValueField = "ColumnName";
ddl.DataBind();
[code]...
i can populate cascading dropdownlist by using webservice now. but may i know how do i trigger function while selectedindex changed? (without using auto postback...)
View 3 RepliesI'm trying to do a similar thing -- I have a long form and in part of it, I have an updatepanel.
Inside the updatepanel I have:5 dropdowns (using the CascadingDropdown functionality)One AddProduct ButtonGrid or Repeater (haven't set it up yet)
I want the following to happen:I have the AddProduct Button disabled initially, but I want it to be enabled once the 5th dropdown is selected (so OnSelectedIndexChanged).If they click the AddProduct button, I want it to populate a Grid or Repeater.So far I am just trying to show what the selection was in a label... but nothing happens. I have an OnSelectedIndexChanged function for the last dropdown, so it enables the button, but that doesn't appear to get called. Previously, before disabling the button, I tried updating the label on button click -- and nothing there either.
It just seems like, because they are in the updatepanel, those callbacks never happen. I also do have UpdateMode = Conditional and I have both items in the triggers list.
I am populating a dropdownlist in a detailsView on Page_Load using a table adaptor as follows
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when i change page from page1 to page 2 I remember Dropdownlist in session
Session("Dropdownlist")=Dropdownlist
now when i go back to page1 I set the Dropdowlist the way what it was before i left page1
Dropdownlist=Session("Dropdownlist")
Everything its remember but when i load the page with my Dropdownlist again. The selectedindex shows default value in the control Dropdownlist.But it does remmeber old selectedindex.I got it wired with Gridwiew and gridwiew show Data by remmeber old selectedindex. Well generally I like to remember selectedindex when i go to a differente page and when i go back have it set in the control dropdownlist the way when i left the page
I am using a dropdownlist in my application and it has corresponding SelectedIndexChanged() event.I would like to invoke GridViewEdit Event when SelectedIndexChanged event fires from dropdown list.Is it possible to implement this...??
<asp:DropDownList ID="ddlStatus" Visible="true" AutoPostBack="true" OnSelectedIndexChanged="ddlStatus_SelectedIndexChanged" runat="server">
</asp:DropDownList>
protected void ddlStatus_SelectedIndexChanged(object sender, EventArgs e)
{
//Code to fire the GridViewEdit Event to put a row in edit mode
}
Unable to generate dropdown event selectedIndexChange in GridView's Edit Template
protected void GridViewDepartment_RowUpdating(object sender, GridViewUpdateEventArgs e)
{ getConnection = connection.SetConnection();
GridView GridViewDepartment = (GridView)sender;
GridViewDepartment.EditIndex = e.RowIndex; // Update Index You Want to edit
GridViewDepartment.DataSource = departmentTable; // ReBind the GridView
[Code] .....
I'm trying to load a gridview based on selection from dropdownlist. When i run the program, it displays empty gridview. How to solve this?
Name of dropdownlist: CatCode
Code behind:
Private Sub BindProdGrid()
Dim conString As String = ConfigurationManager.ConnectionStrings("SY_InventoryConnectionString").ConnectionString
Dim rowIndex As Integer = 0
Dim box11 As DropDownList = CType(SalesGView.Rows(rowIndex).Cells(1).FindControl("CatCode"), DropDownList)
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I've created two datasources, one that gets a list of categories and it's id's and the other one get subcategories and it's id's. The categories are presented in a DropDownList and the subcategories in a ListBox. When choosing a category from the DropDownList the ListBox presents the subcategories of the chosen category. The subcategory datasource is set to get it's value for what category to get from the DropDownList's selected value.
My problem is that when I change the category in the DropDownList the subcategories doesn't update on a postback. Instead I have to press a button on the page that I know performs a postback to get the subcategories to update. What am I doing wrong here? I'm using this method on another page as well and when comparing them I can't find anything different. Any ideas?
I've got two DropDownLists that are filled using a couple of SqlDataSources, like so:
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The third DataSource, dsCriterias, is used to present a set of dynamically added DropDownLists depening on what's selected in the second DropDownList, subcategories. The set of dynamic DropDownLists are presented using this code:
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The code works but there's little thing that's bugging me. When the page is first loaded the criterias belonging to the subcategory is not presented. I expect it to show the criterias but ther won't show until I make a choice in the categories-DropDownList meaning if I wan't the first subcategories criterias I have to choose different subcategory and then go back to the first one. It's a bit hard to explain.
An example: When the page is first loaded I get a category presented, eg. Vehicles. In the subcategories I get the alternatives "Bicycles", "Cars" and "Motorcycles". "Bicycles" will be the one presented when the page loads since the stored procedure used by dsSubcategories sorts the data by the subcategory names. The problem is that I don't get the criterias for the "Bicycles" subcategory at page load. To get them I first need to select "Cars" or "Motorcycles" and then choose "Bicycles".
I've tried putting a subcategories.SelectedIndex = 0 in in the OnLoad but nothing seems to do the trick.
I have a dropdownbox which does an autopostback when selected index has changed. But the selected value never changed.
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here's the code I use after the selectedindexchange
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I have already spent two day to solve this on my own but for some reason I can't. Maybe I'm missing the live cicle of the dropdownlist. I hve a three dropdownlist that filter a gridview and the other two dropdownlists One is "Year" the other is "Country" and the other "Species" Each one of them is filter by the other two. So if I filter for one year it will only show me the species and countries that have records on that year. So I have to reload the gridview and all the dropdownlist.
What happend is that since I'm filling again the dropdownlist with less values he can't remember the previous one. I have tried with the events: DataBinding, Load Unload and Init of the dropdown list to force it to remember. The conclusion I have reach is that the databinding and the load have the dropdown list of the previous page. So if I do
String strYears = ddlYears.SelectedValue.ToString();
ddlYears.SelectedIndex = ddlYears.Items.IndexOf(ddlYears.Items.FindByValue(strYears));
And the year was on the index 4 but after changing the country the year is now index 3 he mantains the index 4 showing me another year.............................