Web Forms :: The SelectedValue In The Dependent Dropdown Is Always Empty After Paper Is Loaded?
Feb 22, 2011
There are two dropdowns in my ASP.NET form. The second dropdown is dependent on the first dropdown - the second onedoes not have the item selected in the first one. My problems is that the selectedValue for the second dropdown is always empty after load event. I tried to set the selectedIndex to be 0 before access selectedValue property in the page load event, but it is still empty. What I want is to get the first item of the second dropdown as the default value.
I have two dropdown linked with sqldatasources.When I select item in ddl1 then on the basis of selection ddl2 is being loaded.Is there any possiblity that if I select ddl2 then ddl1 will also load on the basis of selection?
how to populate a dropdown list box based on selected value in another.
dropdown list box? Say, for example, the first dropdown is a list of car manufactures. When a user selected a manufacture from that dropdown list, the second dropdown would list would automatically gets populated with all the car models for that manufacture.
We were having occasional reports where the value of a set of DropDownBoxs in a GridView would be reset to the first value item in the list.
We finally tracked it down to a timing issue where a user would click Save before the page finished rendering/loading the data, and we are able to repro it on the production server but not locally because the page loads too quickly.
How would we go about detecting this on the server side to know the data returned is invalid or otherwise stop from setting data that the user didn't set?
Iam trying to understand why my sqldatasource control bound to gridview will not return data while i have cascading dropdownlist coded in pageload and selected events respectively?
from which sqldatasource control stored procedure obtains its parameter values.
only when i select items from second dependent dropdown does the grid display data?
I have managed to place a dropdown control iniside a gridview control. The dropdown does indeed populate in each row... How is it possible for the system to correctly select the text in the dropdown based on the value of the field which is driven from the database? Is it to do with the selectedvalue?
I am passing the values obtained from ddlSubGroup and ddlPageNumbers to a datasource as parameter (Actually to a pageddata ) , on which i create a DataList.
The page is working fine actually but the problem is like the following,</p>
Considering that all dropdown are selected as following :
When i change ddlSubGroup to another one , ddlPageNumbers is populated depending on the number of items divided by 20 ( The datalist is paged by 20 items per time)
then i change the ddlSubGroup(RUBBER PARTS in this example for example to BodyParts , so the dropdown values becomes like :
[code]....
At this point Body PARTS also has page numbers like 1,2,3,4 etc but, it still remains as 2 , however i need the page number to reset back to 1.
Is there any way to do this , and where should i place the code exactly ( which event ) ?
I have a website that I have release onto our server. I am trying to debug an issue. I start my Site. I open VS2008 I select attach to process and all my break poins are changed to the empty circle withthe error no symbols loaded. I try to go to debug -> Windwos -> modules but I do not see my .dll on the list to load sysmbols for. I have the smae .dll and .pdb on the server as on my local machine. My build mode is Debug. the server is using IIS7. Ihave tried deleting the Windows -> Microsoft.Net -> Framework -> v2.0.50727 -> Temporary ASP.Net Files.
I have a dropdownlist in DetailsView to which items are added programmatically during DataBound event. It is working fine in InsertItemTemplate, but in EditItemTemplate i am getting this error "'branchDDL' has a SelectedValue which is invalid because it does not exist in the list of items. Parameter name: value".
If I chose none, it stores data as "Null" If I Query the data as below, I don't get the data has value of "Null" SELECT tabale From type Where type <> STO or type <> ORD I get data that has empty string but not Null.
1, How do I write dropdown menu value in oder to get empty string instead of Null?
I did <asp:ListItem Value="">none</asp:ListItem> but this stores Null.
2, Why this Query won't pick up Null?
SELECT mytabale FROM type WHERE type <> STO or type <> ORD
A form contains 2 cascading dropdowns. When an item is selected in the first dropdown, jQuery retrieves a list (json) from the server and fills the 2nd dropdown.
The user posts the page to the server, and when the page is returned the dropdown is empty because its not stored in viewstate.
What do you do in this situation? Is this the point where cascading dropdowns using jQuery and trying to make your page a little more stateless gets tedious?
I'm new to MVC and trying to follow along to the 10-minute overview video at: [URL]. I'm running into a couple of problems starting at the 3:30 mark:
1. When I type in the following code as seen in the video, the DB class isn't found? Is there some namespace I'm meant to include or something? [Code].... 2. At 3:53, I cannot select my model to create a strongly-typed view - the dropdown list is empty.
function populateDDL(ddl_id) { var option_str = ""; var x; for(x in datalist){ option_str += " <asp:ListItem Value='" + datalist[x] + "' Text='" + datalist[x] + "'></asp:ListItem>" } var country_div = document.getElementById(ddl_id); country_div.innerHTML = option_str; }
This is sure the datalist is not empty and also Dropdown list populated perfectly..but dnt know why after clicking on my page add button I am not getting the selected value.
I have this "how to" type of question. I have a page where there are four gridviews. Now these four grids pull data from four different tables. The 1st grid retrieves data from table 1 with a where clause in it's query that comes from a hidden fileld value in the page. Till this things are fine. However, the 2nd grid has a dependency on the 1st grid and the where clause in it's query should be the data selected in grid view1. The 3rd depends on the 2nd one..and so on.
I have a shopping cart. Basically when looking at the product i want to display certain textbox and fields. e.g. if shoes then display the sizes available with qunaityt box against each
what is the best approach for this?
create textboxes dynamically or have static on screen and hide and unhide depending on value
I'm struggling with a web form where I have created one date field and couple of drop down lists. These drop down lists populate themselves from a backend MS ACCESS database file. My problem is that I am not able to make the two drop down menus dependent in a manner that when the first drop down menu is selected the second should be populated accordingly?
I have EPSON LQ 300 Printer which driver or software doesn't allow user defined paper size.But i need code to access printer paper size ( custom size ) in asp.net c#
