Web Forms :: Get A Dropdownlist Selection Cached And Used Later In An App?
Jan 11, 2011
I have a page that searches and displays records. Users enter a record number and then select the type of record to display from a dropdownlist control. They then edit some data on the page, and the app does some calculations based on the type of record that is selected from the drop down. How do i get to successfully pass the value from the dropdownlist to the method that does the calculation to ensure that the right formula is used? Here is the code that I currently have.
[Code]....
then the code behind to do the calculation looks like this...
[Code]....
After stepping through the code, i noticed that when it gets to the "foreach" block, the value selected by the ddlRecordType dropdownlist is always the default which is "select one" and not any of the other selections that might have been selected.How do I get this to work, so that it can maintain the value selected from the dropdown and used in the code behind?
[Code]....
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Aug 12, 2012
i have 3 drop down list in my page
1-ddlzone1
2-ddldistrict1
3-ddlstore1
this is ddlzone1 code
protected void DDLzone1_SelectedIndexChanged(object sender, EventArgs e) {
DDLstore1.Items.Clear();
DDLstore1.Items.Add(new ListItem("select center", ""));
DDLstore1.AppendDataBoundItems = true;
SqlCommand _cmd = new SqlCommand("selectcenter", _cn);
[CODE].....
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Dec 29, 2010
I have 2 dropdownlist, one is to dropdown department, and another dropdown staffnames. the secong dropdownlist will based on the selection of department as each department has different staffs i have 2 tables department and staff in my database , in my department table i have departmentid as PK and departmentname, in my staff table i have staffname and departmentid as FK. So my ques is how am i going to populate staffname in the dropdownlist according to the selection of department.
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Jan 19, 2010
I have one table which contains branch codes(primary key), Branch name and bank name columns. I have 3 dropdownlist boxes. the first dropdownlist is for the branch codes. When i select the a branch code i need the second dropdownlist box to populate with the appropriate branch name and the third dropdownlist box to populate the bank name at the same time.
Is it possible to have one table like mine and acheive this, if so how do i go about doing this?
I did read up on this but only came across ones with 3 tables.
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Sep 2, 2012
i have 2 DDL in my page that when users select item from ddldistric1 item in ddlcity1 will change these are my code
protected void DDLcity1_SelectedIndexChanged(object sender, EventArgs e)
{
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}
private void BindDistrictC()
[code]...
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Jan 8, 2013
I am having two dropdownlist in my project,one dropdownlist for empid, another dropdownlist for month, if the user select the empid, the values are retrieved in the textbox.
In the second dropdownlist, if the user select the month in the dropdownlist it will display the leave details, its all working fine, if the user again select the first dropdownlist that means empid, I want to show the second dropdownlist as select month, how can do this.....
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Aug 1, 2013
I have a dropdownlist on my page with dates such as 1/1/2013, 2/1/2013, etc.
Then there is a second ddl.
If the date in ddl #1 is before 1/10/2013 I want to enable ddl #2.
If the date in ddl #1 is on or after 1/10/2013 I want to either disable ddl #2 or hide it (whichever's easier).
Disabling ddl #2 based on the selected date is a new requirement so I am enhancing the existing code. Obviously I want to do this without a postback, but I don't know what is the best way. I am trying to understand what an AsyncPostBackTrigger is because this is the existing code:
Code:
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:dropdownlist id="EffectiveDateDropDown" runat="server"></asp:dropdownlist>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="QuoteType"
EventName="SelectedIndexChanged" />
</Triggers>
</asp:UpdatePanel>
It wants to do something when the selected index is changed? This exists in the code-behind, but I set a breakpoint and never hit it:
Code:
protected void QuoteType_SelectedIndexChanged(object sender, EventArgs e)
{
try
{
}
catch (Exception err)
{
this.PublishError(err);
}
}
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Jan 3, 2011
1) 1 dropdownlist - department
2)Search button
3) 1 listbox that will display all the staff according to the selection of its department
So when i select the department and click search button, the listbox will be populated with the staff names.
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Sep 29, 2010
I've got two DropDownLists that are filled using a couple of SqlDataSources, like so:
[Code]....
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:
[Code]....
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.
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Jun 8, 2010
I am building a custom control that mimics a dropdownlist with my own custom items in it. I'd like to figure out how after selecting something, the text changes to what was selected.
I can do it with javascript but looking at the html source of a dropdownlist, there is no javascript there to modify the textbox/label.
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Mar 29, 2010
Now my datasource has where clause depends on the selection of a dropdownlist that contains selection of one of the items plsu and option ALL.
This only caters for all or, one item
I need to make it
All, or, 2,3, or 4.. selection and the datasource is then refreshed. What control I should use and it seems the SQL need to modified into "IN" statement, am I wrong ?
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Apr 29, 2010
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.
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String strYears = ddlYears.SelectedValue.ToString();
ddlYears.SelectedIndex = ddlYears.Items.IndexOf(ddlYears.Items.FindByValue(strYears));
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Oct 19, 2010
I have been having some trouble with dropdown lists reverting back to selecting the initial item in the list after a postback once a selection has been made from the dropdown list. I have read up on this and found out that a "if not ispostback then" is required.This works fine when I add in all the items in the dropdown list manually like:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then
ddl1.Items.Add("Select...") [code]....
However, I have over 250 items and so it is far more efficient for me to load then in by using part of a multidimensional array which is created from a text file - Definitive database.txt. I have been using the following code to do so:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then
'loads the definitive database array[code]...
This loads all the items into the dropdown list perfectly, but now every time a selection is made, it reverts back to the inital item on postback even though i have included the "if not ispostback then" part.
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Aug 3, 2010
I have one asp.net dropdownlist which consist A,B values. If user Select A in dropdownlist i need to bind this query to Gridview. Select FirstSelection from Tablname else Select SecondSelection from Tablename. How to do so..?
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Jul 21, 2010
Is there anyway to disable a textBox's validation(RequiredFieldValidator) base on the selection of dropDownList ?
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Apr 16, 2010
I have a dropdown list placed in Update Panel the issue is that when i am trying to make selection from the dropdownlist i am not able to select the items under it(i.e. after clicking on the dropdownlist the items get displayed but when i move the mouse over it the dropdownlist gets closed).
This issue is observed in Fire Fox only (works fine in IE and Google Chrome).
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Feb 15, 2011
dropdownlist selectedvalue not firing.
It shows the inital value after i selected the value from dropdown box and submitted
HTML Code:
<asp:DropDownList ID="DropDownList1" runat="server" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged">
</asp:DropDownList>
.CS File:
Protected void page_load()
{
if (!IsPostBack)
{
Label_Testing.Text = DropDownList1.SelectedValue;
Label_Testing1.Text = DropDownList1.SelectedIndex.ToString();......
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May 7, 2015
How to visible Panel on dropdown selected value with out Reload page...
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Dec 6, 2013
Article located here: [URL] ... Code is simple, straightforward (especially with the stored procedure piece). I customized the code a bit to fit my requirement and it works great.
I would like to know if you can give me a hint on how to do the following:
My dropdownlist has 10 listitems. 7/10 works fine because they populate data from the db. However, there are 3 listitems that link to external sites and they have nothing to do with the db.
I have something in mind but I am not sure if it works or not. What I have in mind is I need to write some script:
In the web page, I need to use SelectedIndexChanged even
In the code-behind, I need to write something like this:
If listitem value = 'yahoo' then 'www.yahoo.com else if listitem value = 'google' then 'www.google.com else URL
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Mar 18, 2011
z'm trying to create a webpage for ticket purchases. When selects an option from a dropdown list and clicks a button, I want them to be taken to the next page where a textbox will be auto-populated with their choice from the dropdown list. For some reason, I can't figure out how to get them to communicate. On Form1 I can get Form2 to open onclick but for some reason, when I put code into pageload for Form2 to pull data from Form1, it won't work. For example, on Form2 I would put the following code under pageload: textbox1.text = Form1.textbox2.text
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Sep 3, 2010
I have 3 cascading dropdownlists. Everything works OK EXCEPT whenever I change the selection in the dropdownlist, the old values from the previous selection are added to the new values (specifically DropDownList id=InstructorList and CourseNumberList)
ASPX page,
<asp:AccessDataSource id="CourseNameSource" Runat="Server" DataFile="r:angel_file_storageCourses.mdb" SelectCommand="SELECT DISTINCT CourseField FROM (SELECT Mid(CourseField, 1, 4) AS CourseField FROM Course_Load) ORDER BY CourseField"/>
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Dec 28, 2010
On my webform, i have one grid, 2 dropdownlist and one datepicker control.
When i select items from my both dropdown and date from datepicker control, i want to populate my grid based on above mention control selections.
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Oct 5, 2010
I have a problem with binding a DropDownList. Let's assume a database five years old with many historical records. In order to enable just working with active data every datasource has a column hidden which is occasionally set by administrator in order to clean up old records. The selection looks like
1) SELECT Id, Value FROM Table WHERE Hidden = 0
The issue arises when the user opens a form with old data. As some records in DropDownListhave have already been hidden an exception is raised as the component cannot find the data for the list. For this case the following selection is valid
2) SELECT Id, Value FROM Table
it is possible to combine these two selection queries? The display value should always use query 2 while the listed values should use the query 1.
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Sep 14, 2010
I have a dynamically generated dropdownlist, that lists e.g. Company Names. I want to be able to select a particular Company and display associated information e.g. Name, Address, City, State... etc. in text boxes adjacent to the list.
I am trying to fire the following code from the dropdownlist "OnSelectedIndexChanged" property, but cannot 1) get the code to fire upon selection, and 2) populate the text boxes...
[code]...
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Oct 27, 2010
Cannot populate the textbox with selection from dropdownlist
[Code]....
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