Web Forms :: Changing Index On Dropdownlists Childs Don´t Cause Other Dropdownlists To Reload?

Jan 30, 2011

i have the following code:

[Code]....

3 nested dropdownlists SELECTing from DB. So i select the brand, then i select the model and then i select the product and click on SEARCH button.

But when i select thebrand, and then the model, and if i want to change the brand, it does not reset the second and third dropdownlists.

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[Code]....

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[Code]....

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[Code]....

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[Code]....

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I need to filter data in a View using three dropdownlists that are populated independently of one another. The items in the second ddl are not based on the items in the first, etc. Each ddl is populated using its own sql statement. I want to be able to use each of these dropdownlists independently of the other two, but I want the data that is returned to be based on the values already in the other dropdownlists when I make a selection change.

For example: DDL1 is populated with Horsepower values from its own SQL statement.

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I want to filter my gridview using two parameters that come from Dropdownlists. I bind these drops with two linq queries and next I would like to filter my gridview with query that has two parameters that comes from selected values from those drops. Everything is inserted in UpdatePanel. Here is my code:

asp:UpdatePanel
ID="UpdatePanel1"
runat="server"
>

[Code]....

I don't know how to get selectedvalues from dropdownlist and pass them to Bind() function which binds grid view

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Forms Data Controls :: Large DropDownLists In GridView?

Jan 5, 2010

I have a gridview that is currently showing 20 lines per page. Each line has several fields in it, three of which are dropdownlists. These dropdownlists are populated with a SQLDataSource and then the selected value is bound to one of the gridview datalements.

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Forms Data Controls :: DropDownLists With ControlParameters That Reference Each Other?

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I have two DropDownLists, and each one has a Control Parameter that references the other.

The idea is that if you select a value in either one of them, it restricts the possible values you can select in the other. And the user may select either one of them first.

Each one has an "All" option for selecting all values. (They are both used to restrict rows that populate a GridView).

This is all done using SQLDataSources.

The problem is that it doesn't seem to work at all. Both DropDownLists are empty, and the SQL that populates them never hits the SQL Server. But there is no error displayed.

If I have it going only one way, it does work, so I think the problem is the recursive nature of having them reference each other.

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Forms Data Controls :: Gridview With Dropdownlists And Label

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I have a gridview with 4 dropdownlists and 1 label in each row. Suppose , text fields of each dropdownlists are a,b,c and value fields are 1,2,3 respectively.

In each row,label text is the sum of value fields of selected text fields of 4 dropdownlist.

For example,If selected text of 4 dropdownlists of a row are-b,a,b,c.

Then the label text of that row will be 8.(value field of b=2,a=1,c=3 , so b+a+b+c=8)

Whenever the selected text of any dropdownlist changes,corresponding label field also will change.

How can we do this in asp.net with C#?

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Jul 28, 2010

I'm comfortable populating dropdownlists in a standard webform, but I seem to be having trouble populating them from within a gridview or listview.I know that I'll probably need to use the find control method, I've had a stab at it with the following:

[Code]....

The purpose of this is to allow someone to look at a bunch of records, and in a dropdownlist add an item to a group, but this "group" is in a separate table, so I want to take whatever value that select in the dropdown menu, lookup their user id, and add both bits of information to the other table, so it's technically not even editing, even though i suspect I'll need to use the edititem template?

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Forms Data Controls :: Cascading DropDownLists In DetailsView?

Sep 10, 2010

Here is the case:

I use Visual Studio 2008 ASP.NET 3.5

I have a DetailsView control with several fields that is in insert mode. Three of them are the source of my problems and headaches.

I have three DropDownLists in template fields.

The first one is OK, bound to it's designated field in table1 in the database. The next two however have to change their bound tables according to the SelectedValue.

So far, I've managed to get it working, BUT when I insert the data I've entered, these two DropDownLists are not entered into the database.

DropDownList3 - the list that controls the other two DDLs

DropDownList4 and DropDownList5 - the list that need to change their items accordingly

DropDownList3 has six different values, so I have 6 tables for each of the other two DDLs

However I have only tried with one to see if it would work, that's why the Sub seems incomplete.

Here is the relevant part of the code:

[Code]....

And the DropDownList3_SelectedIndexChanged sub:

[Code]....

If I leave SelectedValue='<%# Bind("shelves") %>' and SelectedValue='<%# Bind("type") %>' in the <asp:DropDownList> tag of the two DDLs that change values, I get an error when the first one does the postback.

The error is:

Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control. This error, I spent a whole day looking through forums and knowledge bases, but I could find nothing that solves my problem. Maybe the problem is me, but my boss wants this done, despite it is not my area of expertise to write code.

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Forms Data Controls :: Displaying Gridview Containing DropDownLists?

Oct 15, 2010

On one of my pages I display a Gridview. This contains a list of questions generated by a SQLDataSource, with a dropdownlist on each row containing the answers for that question. The answer values can be different depending on the question, so I populate them in the RowDataBound event for the gridview, using question information.

As the list of questions is longer than the page I have placed the gridview within a Div which allows me to use scrollbars to navigate the gridview. I also use some methods to preserve the location of the last question answered - so that on answering a question, the gridview does not reset to show the first part of the gridview.

This works fine for IE7, which is what I have been using for the development, and which part of my customer base uses. However, the other part of my customer base uses IE6, which causes a problem.

When an IE6 user attempts to answer some questions, they run into issues. Should they scroll down the gridview, when they select a value from a dropdownlist (Effectively, when they answer a question), there is a postback and all of the visible (i.e. onscreen) dropdownlists appear to be cleared. However, on mousing over any of the dropdownlists, their value is then shown. On using either the scrollbar, or on using the mousewheel to scroll the gridview, all the dropdownlists are 'refreshed' and their values are shown.

At no point does the application appear to lose the data, it is just not showing it until there is a mouseover or the gridview is refreshed. Another odd aspect of this is that this does not apply to the first 5 rows of the Gridview. Any of these can be altered without there being this display issue. Should the gridview be scrolled enough to show some of the first 5 rows and some subsequent rows, only the subsequent rows will have this display issue.

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Dec 23, 2015

Iam having 6 dropdownlist.If I selected a Value in first dropdownlist it should not appeared in other five or it should gives it is already selected.

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Web Forms :: Display Total Of Selected Value Of Three DropDownLists In TextBox?

Mar 22, 2013

I have three dropdownlist boxes . Each dropdownlist contains 1-9 as their values . The user after selecting values in these three dropdownlist boxes and next button is clicked. On next page the total number of values must be taken & that much number of textboxes should display..

WebFrom, VB Language

For Example: If user selects 3 , 5  & 1 as the values ... when the next button is clicked 3+5+1 = 9 ... 9 Textboxes should be displayed to the user for entering details...

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Mar 11, 2010

I have got 2 Drop Down Lists on my Form and 1 GridView. I want GridView to display the data according to selection from the Drop Down Lists.

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BTW i am binding both the Drop Down Lists and the Grid View to the DataSource Objects, which is getting data from the database.

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Forms Data Controls :: Disabling A Column Of Dropdownlists In Gridview?

Oct 20, 2010

I am filling a gridview with data.

column 1 is a dropdownlist <ddlGrade>

column 2 is a checkbox <cbxNeverAttended> not visible

column 3 is a textbox <tbxLastDate> not visible

in the 'GridView_RowDataBound'

i determine if a ddlGrade value already exists and if so, make it selected in the dropdownlist

also, if the value of ddlGrade is a "U" I make cbxNeverAttended and tbxLastDate visible

However, if cbxNeverAttended or tbxLastDate are both empty strings (and ddlGrade has the value "U"), I want to disable all instances of ddlGrade in the gridview (essentially forcing the user to enter a value for cbxNeverAttended or tbxLastDate before moving on to enter another ddlGrade).

But I have been unable to figure out a way to accomplish this on the 'Gridview_RowDataBound',

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