Create New Control Depending On SelectedValue In A DropDownList?

Feb 25, 2010

I have a with dynamic values from an Enum like: String, Int, Double, Bool, DateTime.How do I create a new Control depending on what is the SelectedValue dynamically into the page? I want a CheckBox for Bool, TextBox for String, Calendar for DateTime etc.

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in my asp.net and vb code web. i have a drop downlist and a text box. 

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Aug 2, 2010

I have a dropdownlist whose values are int (actually they are string basically but they can be parsed. they are 1, 2, 3, 4, 5.. etc)

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Nov 18, 2010

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".

. Following is the code:

<asp:TemplateField
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Setting SelectedValue For One DropDownList Also Updates The SelectedValue For Another DropDownLIst

Jul 21, 2010

I have a WebForms page that has two DropDownList controls on it that both contain a range of temperatures from 60-80 degrees, one for heating the other for cooling. They are declared in the .aspx as:

<asp:DropDownList ID="heating" runat="server" />
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for(int i = 60; i <= 80; i++)
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When I try to set the selected value for each DropDownList using the values in an object containing data loaded from the database using:heating.SelectedValue = myHome.avgHeatingTemp.ToString();
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The SelectedValue for both lists is set first to the value in myHome.avgHeatingTemp, then to the value in myHome.avgCoolingTemp. Heres what the values are for each variable after each step of the process of setting the SelectedValues:

Initial State
heating.SelectedValue: 60
cooling.SelectedValue: 60 [code]....

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ViewData("Languages") =
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Mar 4, 2011

I have nearly 15 dropdownlist on my web form, and one text box,

any of the selectedIndex change, the total must be reflected to text box,

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So, I want that,any of the dropdown selectedindex change the average must be reflected in textbox,

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Feb 4, 2011

I have a dropdownlist that is populated by a webservice using the ajax cascading dropdown. I have not been able to set the selected value using javascript. It appears that the values do not exist when the javascript runs. I placed the javascript at the bottom of the aspx page

<asp:DropDownList ID="ddlBusinessArea" runat="server"></asp:DropDownList>
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[code]...

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Get Selectedvalue From Dynamic Dropdownlist?

Mar 25, 2010

It seems to lost all the Dropdownlist controls on postback ... and I save array dropdownlist in Session but I can't get selectedvalue from dynamic dropdownlist. Dropdownlist only get first selectedvalue

Here're my code


[Code]....
In file aspx [Code]....

Result Label : 01 - 11 -

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Get SelectedValue Of Dropdownlist From Code Behind?

Oct 27, 2010

On an aspx page I have a dropdownlist and a button.

I select a value from the dropdownlist and click the button.

In the button event handler I have the statment: DropDownList1.SelectedValue;

This value is showing up as the first item in the list regardless of what item is actually selected.

Same result with .SelectedItem.Value and .Text

Why? And how do I get the item actually selected?

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Get SelectedValue() Of DropDownList After Setting The Value?

Dec 13, 2010

I have a databound dropdownlist on a page, where in the page_load I set the selectedValue (inside a 'not isPostBack').

Although the page displays fine and shows the correct item as selected.. inside the page_load if I try and get the selectedValue() and display it to the screen, I always get null... selectedIndex is -1.

I have a button, which when clicked refers to this ddl's selectedValue, and here it pulls through the the expected result.. so how come I can't see it immediately after setting it, while still in page_load?

edit: the code..

ddl declaration
<asp:DropDownList runat="server" ID="dlCountryList" DataSourceID="dsCountryList"
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and the page_load

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Web Forms :: 'Dropdownlist' Has A SelectedValue Which Is Invalid / How To Fix It

Oct 1, 2010

I have a dropdown list that has a bind on it and I get this error. Why am I getting this error and what can I do to fix it. here is the code for the dropdown I currently have:

[Code]....

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Web Forms :: Setting SelectedValue In Dropdownlist

May 11, 2010

I have a ASP.Net webform with a DropDownList control. This Dropdown gets it's values from a states table in an ObjectDatasource. The Dropdown contains states spelled out.

If I try to set the drop down to:
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How can I either define the dropdown without trailing spaces in the value of the dropwdown or set the SelectedValue with adding trailing spaces?

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C# - Setting SelectedValue Of A DropDownList On PageLoad

Nov 11, 2010

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I've got a set of cascading dropdowns, but I want the default selectedvalue to be there when when page loads though.Right now, my dropdownlist is defaulting to the first value in the DDL.
(ASP.NET C#) and the code (issue is with the "DDL_Assignment" dropdown).

[Code]....

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Aug 13, 2010

I am trying to do this as asked earlier. The only difference that I found is additional List item that was included in above code.

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[code].....

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In SQL, you can create a query and use a "IN".. Select * from tOffices where OfficeID in ('1', '2', '3'). Is it possible, in my vb.net code behind to check if a selected value is "in" a list of values like this?

If ArrangementID.SelectedValue in ("6","7","99") then...

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I have a DropDownList which is databound and pulls back the values from SQL.

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[Code]....

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Aug 26, 2010

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Web Forms :: How To Set The SelectedIndex Of A DropDownList Based On The SelectedValue

Apr 24, 2010

how do I set the SelectedIndex of a DropDownList based on the SelectedValue

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I'm using XmlDataSource as the datasource for a dropdownlist. Now I want to set the SelectedValue of the dropdown when the page initially loads. I tried the OnDataBound event of the dropdown in which I could see the total items but setting the SelectedValue didn't work. In OnDataBinding event, I couldn't even see the total items probably because the list isn't bound yet.

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C# - Bind SelectedValue Of DropDownList To Nested Property?

Feb 10, 2010

I have a asp.net FormView with a DropDownList for the selection of a month. The FormView is data bound to an ObjectDataSource.

<asp:DropDownList ID="MonthsList" DataSourceID="MonthsListDataSource" DataTextField="Value" DataValueField="Key" SelectedValue='<%# Bind("OrderDate.Month") %>' Width="100" runat="server" />

I like to bind the selected value to the nested property 'Month' of 'OrderDate' as shown above. The property OrderDate is of type DateTime. The error I'm getting while binding to a nested property is:

A call to Bind was not well formatted. Please refer to documentation for the correct parameters to Bind.

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Web Forms :: Dropdownlist Selectedvalue Doesn't Change?

Jan 21, 2010

[Code]....

here's the code I use after the selectedindexchange

[Code]....

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Web Forms :: View Dropdownlist Selectedvalue In Textbox?

Mar 18, 2011

i am using one dropdownlist for showing deptname from DB using cascadingdropdownlist and web services.i want when i select dropdown value it should be display in textbox.but don't know how to do this.tell me what is c# code for this.

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