Web Forms :: Drop Down List Is Dynamically Populated At Runtime?
Jul 5, 2010
I've got a dynamically populated drop down list and was wondering if web crawlers are able to see dynamically rendered data? Here is my static html below, and the end result to the end user is a drop down list that's populated from my SQL query within my datasource below.
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Similar Messages:
Apr 7, 2010
someone can help and provide some info or links to achieve the following:
I would like to prompt a message box with a drop down list that retrieves values from a sql server at runtime so user can select from. After user selects the value from the drop down list, the value is passed to the Master/content page to use as an additional query parameter to proceed to the next step to display content page.I understand how to create a message box in javascript, but I understand you can't do queries from javascript, if I'm correct.
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Sep 6, 2010
I wanted to add values to drop down list dynamically, How can I do that?
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Jul 5, 2010
so I have drop down list connected to a datasource, and I need to change 2 or 3 of the values before they are displayed and I'm just having trouble figuring out what to do. I'm assuming I setup some kind of loop to check the values, but thats all I can figure.
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Oct 19, 2010
In my gridview I have a list of chassises paired with hard drives and the current chassis user. On editing I have a users dropdownlist and I have a dropdown list of hard drives. How can I make it so that if my Chassis type is "fixed" then the hard drives dropdownlist shouldn't appear (only the previous value will be displayed) but still allow the users the be changed?
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Mar 30, 2010
I have a drop down list that has the initials of about 12 of our sales guys.How can I make it so that when they select their initials from the list, the next drop down list only shows their customers.In my database there is a column for customer name and salesman.
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Jun 15, 2010
n a form I have multiple group of controls which are grouped using validation group property. I want to assign validation group to asp.Button dynamically on client side using javascript on the base of item selected in drop down list.
Here is JavaScript which I am using, but it is not working. It shows validation group undefined but actually a default group is defined.
<script type="text/JavaScript">
function NextClicked() {
var _ddlStatus = document.getElementById("<%=ddl.ClientID%>");
var _selectedIndex = _ddlStatus.selectedIndex;
var _btn = document.getElementById("<%=btnNext.ClientID%>");
alert(_btn.ValidationGroup); // here in messge it shows undefiend, yet I have defiend a group in button as default.
if (_selectedIndex == 1) {
_btn.ValidationGroup = "G1";
}
if (_selectedIndex == 2) {
_btn.ValidationGroup = "G2";
}
}
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Mar 12, 2010
How can I have 2 Cascading Drop Down Lists for the same Drop Down List?here is my problemi have 3 drop down lists read from database1- Schools List 2- Classes List3- Teachers ListEvery School will have more than 1 Class and more than 1 TeacherWhat I want is when user select a School from Schools Drop Down List then BOTH (Classes and Teachers) should be refreshed based on the School Drop Down List
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Jan 29, 2010
when i just click on the DropDownListBox then it populates the list of items.
when i move on the on of item then color of that item changes to blue i want to assignthe tooltip for this perticular item.bcoz my text of listitem is too large which is greater than width of listbox.s there any event to capture the moved listitem
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Jun 3, 2010
I have two drop down lists on my page. One (DropDownList A) has the values preset by me. The other (DropDownList B) has its values filled by a database query if a button is pressed. Each of them have AutoPostBack set to true. Each of them have corresponding onselectedindexchanged functions. DropDownList A works fine. When I change it, I want it to turn itself invisible. It does. DropwDownList B is not working. When I select something, it does the postback but the selected item is reset and the onselectedindexchanged function is never called. I feel like this is a problem I've solved in the past, but it's been 3 years since I programmed ASP.NET. All this is done in C# by the way.
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Apr 12, 2010
Here is my attempt:
[Code]....
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May 26, 2010
i am currently working on a webform that has several dynamically populated dropdown lists. this works just fine, however, i have other web controls that require to have a postback..and at the time the page postsback, it reloads my dropdownlists, reseting whatever option i had chosen...
what can i do to resolve this?
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Sep 27, 2010
Sample Code.
<asp:DropDownList ID="MediaTypeDDL" Width="306px" ToolTip="Select Media Type" runat="server"></asp:DropDownList>
<asp:DropDownList ID="MediaFormatDDL" Width="306px" ToolTip="Select Media Format" runat="server"> </asp:DropDownList
<asp:Button
ID="btnUpload"
runat="server"
OnClick="btnUpload_Click"
Text="Upload"
/><br
/>
protected void btnUpload_Click(object sender, EventArgs e)
{
String strMediaFormat = MediaFormatDDL.SelectedItem.ToString(); // Not seeing value here!
}
Item Selected in MediaTypeDDL determines values in MediaFormatDDL. I'm using Javascript to populate MediaFormatDDL. This is working. I now select the item I want from MediaFormatDDL. That works The problem I'm seeing occurs when I press the button to save the values from
the screen. I don't see the Item I selected from MediaTypeDDL. All the other fields are okay. This must be someThing simple, but I'm not seeing it.
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Oct 17, 2010
Dynamically populated Radiobuttonlist?
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Apr 30, 2010
I have a form with 2 sections. The first one contains some radio buttons. The second one contains a checkboxlist. When we change the selected radio button then it modifies the elements in the checkboxlist. For this I setted the radio buttons with autopostback, and in the code behind (in OnLoad) I populate the CheckBoxList depending on the selected radio button.
This work fine.
The problem is that I also have a button at the end of my form which post the data of my form in another page (with PostBackUrl). Then in that page I would like to retrieve the values of the checked checkbox. But I can't find how to do that. In the Request.Form I don't see anything.
I searched on the web but I didn't found really a solution.
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Mar 21, 2011
I have a listbox that I am populating at runtime with javascript. After the listbox is populated I am using a button to get that value. on button click when I am trying to get the value it is the listbox item count is 0, Can anyone tell what's wrong after t he javascript populates the code,I have written the code in button click :
for (int i = 0; listbox1.Items.Count - 1; i++)
{
string s = listbox1.Items[i].ToString();
}
the value of count is showing as 0, though it has the values populated. What I am missing ?
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Jun 24, 2010
I have drop down list box that I would like to show two columns, is this possible? Or can it be done with a list box?The query correctly retrieves all of the table data to be displayed, one colum is an abbreviation, the other a bit longer description.
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Feb 6, 2010
I have the following Students class:
[Code]....
I need the 1 since it's a foreign key in another table. For the life of me, I can't get this to work like this.
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Mar 10, 2011
I have the following code which simply gets data from a table and populates the questions_lb listbox with items. I have a button on the page, which when clicked, should write (on submit) the selected state of each of the items. The code below writes the text values of each of the items fine however it always writes the li.Selected as False even though i have selected items from the list. Note that you can select Multiple items from the list. Does anyone have a clue why its not writing 'True' for an item that is selected on submit?
[Code]....
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Mar 28, 2011
I have a gridview which contains a templatefield. Inside this is an ImageButton and a dropdownlist. This is all created in the aspx page, although the ddl list items are populated in the RowDataBound event in the vb page. When i change the selected item in the drop down list and hit the imagebutton, the selected item is not maintained after postback. Instead the first record is displayed in the dropdownlist. I have wrapped an If Not Page.IsPostback around the datasource and databind's but this doesn't help. I have tried enabling viewstate in all areas on the page too, but still nothing. The list items for the ddl must be created on RowDataBound also. As far as I am aware, my ddl is not really dynamic, its just the list items which I add in the code behind which are classed as dynamic.
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Jan 15, 2010
i have a checklistbox that is databound during Page_Init in an
If (!Page.IsPostBack)
block. the user can then check off certain values, and click an asp.net button which posts back the form and renders a crystal report on the same page.
i need to be able to determine which items were checked in the control so that they can be used as parameters in the crystal report. rendering must be done during Page_Init.
the checklistbox object is on the page during design time; only the items are dynamic.
i tried using the Request.Form object during Page_Init to obtain the checkboxlist's items but either i didn't code it correctly or it can't be done that way...
can the checkboxlist items' values be obtained during Page_Init, and if so, how?
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Apr 29, 2010
My dropdown list is populated by a group of names inalphabetical order.
However, I would like "Please Select Name" to be the first item in dropdown list.
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Jan 11, 2010
asp.net using visual studio 2008 3.5 framework with sqlserver 2008. I have a webform (derived from master page) so its a content form with content placeholder. It has two text boxes, dynamically populated checkboxes from database and 8 radio button groups. It has two custom validators attached with two of my fields also. I've tried every way to clear my form but its not working somehow. I've tried Control iteration method. Ive tried btnReset.Attributes.Add("onClick","document.forms[0].reset();return false;"); thingy...but none is working.
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Jul 23, 2010
the problem is actually in the subject. I have custom control that uses treeview. The control is added dynamically. Nodes for this treeview are populated on demand. Treeview nodes can be checked. I recreate this control on page load event, but still CheckedNodes is empty if checked nodes were added dynamically (added on demand).
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Feb 1, 2010
There are a few posts on the site about how to order by using lambda expressions however I cannot seem to get mine to work. I am trying to reorder a list that is already populated. Am i wrong in thinking that i can rearrange the order of this list using lambada expressions?
QuarterMileTimes.OrderByDescending(c => c.PquartermileTime);
I was wondering if it's down to PquartermileTime being a string? I also tried this expression on a date
QuarterMileTimes.orderBy(c => c.RaceDay);
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