Web Forms :: Can't Read Value Of DropDownList In Web Control
Feb 27, 2011
I several instances of a webcontrol on my page. The codefile can't see the drop down list's Text property so I am using the FindControl. I have had this working, but only if I specify which 'instance' of the webcontrol I want to read. Due to the fact the webcontrol is repeated 6 times on the page, I want to put this through the loop. This is the working version:
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Now, I have tried to loop through all web controls. My code (C#)
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The value of ddl.Text and ddl.SelectedIndex is always null.
I have a survey form, survey.aspx, that looks for information about 3 different people (hiking guides) who are all contained in a single DropDownList. Instead of repeating the list over and over, I figured I'd put them all into a single user control, GuideList.ascx, shown here.
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The form has 3 instances of this User Control. Here’s what the first one looks like:
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In trying to access the value the user chooses from the DropDownList, I have created the following code in GuideList.ascx.cs
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In Survey.aspx.vb, I have the following, that often blows up because it doesn’t like G1:
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I have tried using GuideList1 and GetGuide and GuideList1.GetGuide and GuideList1.G1 and all sorts of variations, but cannot seem to figure out what I'm missing to access the value of the DropDownList.
I have 3 drop down list. 1 is for hours; 1 is for minute; 1 is for AM or PM. I want to read the time in from the database and set the drop down list for the users so they can make updates if need be. I tried ddhour.selectedindex = 1. Can I do this in asp??
Using: Visual web developer 2008; APS.net; VB.net Code; Access db
I had use a combox to let user select staff name and then it will automatically retrive the responsible recommending officer and approving officer to display in other 2 dropdownlist.
my code works fine but when user select staff name each time, the page will reload once to refresh the dropdownlist.
user complaint and don't want the page reload every time, how can i disable the postback? I need to use ajax?
I have to set dropdownlost to read only. I can set enabled =false. But I cannot set font color to regular dropdown text. It will show like blur. The samething I did textbox.readonly=false. There we can see font same as regular text, no change. The same way I want read only for dropdownlist. Is there any way we can do with CSS or javascript or jQuery ?.
I have two ListBox in my ascx file, I fill them with some data (no problem here), I make them multiple and increase the size, below is my code.
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I use some jQuery code to exchange element between them (Here too, no problem). My problem begin when I post my form, I'm unable to get the data from the DropDownList with attribute multiple or size. I tried in my controler to add a FormCollection parameter, I can see every element in my form except those select tag with more options than id and name. I tested to put a manual select tag in my code with only an id and a name then add size and multiple attribute, when there is only id and name I can get the value but when there are more I can't get my select tag in the FormCollection
Also I need to get all the value in the ListBoxand not only the ones who were selected. I have been searching answer for 2 fays now... Without success, I only find resource on how to show ListBoxbut not how to get values from them in mvc web site and I don't find any resources who talk about multiple selection ListBox, I think I'm a bad searcher but....
I've got a dropdownlist control that the user can select an an employee name and that should then fill in the detailsview control with specific information about that employee.
My dropdownlist control works fine and I do have AutoPostBack set to true. For some reason my detailsview doesn't work. There's no error message. The detailsview control just doesn't show up.
Here's my code:
This is the sqldatasource control for the dropdownlist control:
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This is the sqldatasource control for the detailsview control:
i design a webpage in asp.net(C#) and in webpage user can upload an image in database i can read image from database but i can't load image in imagebox control!
I've put a DropDownList control within a LoginView control. I've got 2 SqlDataSource controls outside of the LoginView control, with the intent of databinding the items that comprise the ListItems of the DropDownList control, and another one for the data is stored in another table which has what was previously saved for the selection. However, when I've assign the SqlDataSource control to the DropDownList control's DataSourceID for the lookup table, I'm used to seeing the fields from the SqlDataSource control appearing in the DataTextField and DataValueField properties. However, they're not appearing there at all. Moreover, even when I try to type them in, its as if VS 2010 refuses to allow them.
I am dynamically adding the checkboxes in calender DayRender event. i need to read them on some other button click event on webpage.I need to read the checked checkboxes.
I am not able to find the projects related to working with excel sheets by using ClosedXML to refer. I have an excel book  which contains two sheets.
In sheet 01: In column A: Â Â Â Â Â Â Â Â Â Â Â Â Â In B: Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â In C:
Student name01      Student's phone number                       blabla
Student name02      Student's phone number                       blabla
Student name03      Student's phone number                       blabla
In sheet 02: In column A: Â Â Â Â Â Â Â Â Â Â Â Â Â In B: Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â In C:
course name01      computerscience             blabla
course name02      dhfsthshbstgs                 blabla
course name03      garsfghsefrgs                  blabla
now, I would like to see in two comboboxes (all the words/text presented in the column A) from two sheets, the student name and course name and then I want select any student name and course name of my choice. Afterwards, when I click on a button, my program should display the students phone number and the course name (from column B from both sheets) and related things present in the Column C D E.. of the selected things in combobox in a label or a in a textbox.
PS: I solved the following problem: I can select student name in one combobox and print the the corresponding data from the only one column B (but I worked only with one sheet). It is bit complicated for me to continue with two sheets.
I'm fetching data from database which is of datetime data type and is in format "yyyy-MM-dd HH:mm:ss" Eg: 2010-11-04 00:00:00 Now I want to display this same data in same format from DropDownList to Label Control. But when I try to display data, the same data is displayed but in some other format like Eg: 04-11-2010 00:00:00
I have a Dropdownlist control in my web form with names of few countries pre populated.I have also added a 'Please select..' option in the DDL .Now how to use validation control in DDL so that please select options doesnotget selected when i click submit button.Only after user selects country i want to insert the value in database.
I have requirement like admin will uploads some pdf files ,which contain text box ,check box, similarly we will have master table which contain some matched fields. If pdf fields mached with master table fields then i will store mached fields pdf control id's in data base , next time if i open this pdf file i need to auto fill this matched fields in pdf file.
In the below example i cant get the value of "4" to appear in the rendered page. The output from below compiles and executes just fine but all three of the values shown are "0".
Here's a short snippet: (hopefully I'm formatting this correctly)
i have a dropdown list and what happens is that when i click on the dropdown button the list appears under other controls and it pops upwards. If it pops downwards and is non transparent then it would be visible .how is this achievable ?
I have one dropdownlist control which populates values to other controls. Means upon selecting item in dropdownlist, related data is populated in other controls. I have also assigned dropdownlist's autopostback to TRUE. Everything is working good as far as dropdown has more than one item.
Whenever there is only one item, selectedindexchanged event is not fired (obviously.....) and eventually the data is not populated to other controls.
How could I get rid of this scenario? I mean which event should I use to avoid this?
At this time, I have just added the first item as something like "---Select Item---" , so when end-user has to select different item and thus the selecteditemindexchanged is fired. no biggie... but just wondering if proper solution is available....
I want to use a dropdownlist control so that a user can select a value. My problem is, the text value can be very large. Is there any way to make the text to appear on more than one line? Or is there any AJAX or jquery solutions? I can use a gridview with a checkbox but my client really wants a dropdownlist.
