Forms Data Controls :: DropDownList In DataGrid Selected Value Not Being Saved On Postback
Apr 13, 2010
I have a DataGrid that has a dropdown list in an ItemTemplate. Basically, users select a value from the dropdown for each row of the datagrid. When the page is posted back, the selected index of the dropdown list is always reset to 0, and the items are re-bound.
Does anyone know why this might happend? The dropdown items are hardcoded, so there is no external data binding that happens on post back.
i have a gridview which consists of databounds and dropdownlist control. When I press the Add Grid Row Button, it will insert a row. Now my question is, if the user selected an item in dropdownList in the firstrow and the user click the AddGridRowBtn Again which will generate the 2nd row, how would i maintain the selectedItem in the dropdownlist after postback?
my goal is to do this:a user clicks on one row on the datagrid (.net 3.5). (the user can click anywhere of the row)then the form postbacks, and then other content based on the selected row on the page will be updated.
I have the problem with dropdownlist value inside gridview.my problem is i have textbox,button with two dropdownlists, dropdownlists are inside gridview.Two dropdownlists are one is ddlcountry and another one is ddlstates. if i select country from ddlcountry , country related states comes in ddlstates. after entering first record value in textbox then button click textbox value is shown in gridview with two dropdown lists dropdown list, after selecting one dropdownlist country and states, i enter second record value and button click then only country selected value visible ddlstates selectedvalue not visible in first record in gridview...
I need to create a user control which will be loaded according to the selected value of a dropdownlist. The Dropdownlist is not the part of Control. I want to pass the value of selected value of dropdonwlist to my user control and the user control will load according to the Value. For not postback it work fine. But when the page is postback, that is when i select a item form dorpdownlist, the user control is not loaded.
I am trying to display a gridview with element names bound to a datatable (transformed from OracleReader) and also display two contact dropdowns inside the gridview. For each record in the datagrid i want to display these dropdown lists that will also be bound to two different datasources. How would I accomplish this?
the problem is that , i have two dropdown in a datagrid one dropdown contain diffrent type of tax name and other contain the tax rate releated to that tax and i also have one buttton i datagrid which work to insert another row for next tax type.now problem is that as sooon as the new row inserted the both dropdown takes the values but as soon as i changed the selected index of dropdown taxname then then all the taxrate dropdown values has been changed with respect to the new one taxname values.
I have a web application that takes information entered by the user and displays it in a few datagrids, that are located withing a multiview.
In order to enter a row to a datagrid the user enters some information and clicking on a button calls a function that adds the data to an arraylist, which is the source of the datagrid. In addition, every postback the data is binded to the datagrid.
It all works fine in the first time, but from the second row and on it enters only parts of the data and ignores the rest.
I have a DataGrid bound to an ObjectDataSource, as you know once the DataSourceID on DataGrid is set, data binding happen automatically without any coding. But due to requests from end users, I need to prevent the data binding when the page is loaded the first time, i.e. data binding should only happen during PostBack. How do I do that?
I'm trying to create a web page using Visual C#.NET 2010 on a 3.5 framework that allows users to select items through a series of dropboxes which are then saved to a temporary display grid. The problem I'm having is that I wish to allow users to save multiple combinations of selections which are saved to various rows of the display table.
Below is a sample of what I'm trying to do.
C#
[Code]....
And here is the ASPX page:
[Code]....
The problem I'm having is whenever I try to edit the selected column all other columns are cleared. I need to have them remain while only the selected row is altered.
Obviously I am using the tableDnD() function to do that, but after I swapped them, I am saving the datagrid in a DataTable as it is (altered). However this doesn't happen. I need the changes to be posted back to the server. I tried to __doPostBack() after the onDrop function with no luck.
I have a datareader that returns a few fields (orderid, customer id, customername, location, total amount - as an example) that is bound to a datagrid on an asp page. The datagrid simply displays customername, location and total amount and has 2 buttons
below it labelled 'Add New' and 'Edit' and I would like the following to happen:
1) when a user clicks on any cell in the datagrid, I want that row to be highlighted in someway so that the user is aware of the highlighted row.
2) If the user then clicks on Edit button, I want to go to another page that displays the details of that order by passing the orderid of that row to the next page.
The idea is that the user selects a row on the datagrid and then clicks edit which will take them to another page where they can edit/updated details but I'm not sure how I can pass a value of a selected row in a datagrid to another page. I am aware that you can add a template column with buttons on but I would like to have one set of buttons rather than have buttons on each row of the datagrid.
I'm needing to get the selected rows, based on checkboxes, to insert into a different table than that that the gridview is formed from. I've created an innerjoin datasource to try and solve this but, still having problems finding something that works. I also need it to insert based upon a button click not inside the gridview as I believe otherwise would only hamper the situation more.
I'm trying to display a confirm message box before firing selectedIndexChanged when user change selection in the dropDownList. I was wondering if anyone would an example of how to do this.
So I have a dropdownlist and I'm trying to populate it with values in the database. For some reason, half of the rows has no value. It's happenning in a sequence as well, like the first row has no value, then the second row has value, then the third hasno value....
I've tried many different ways to try to get the selectedIndexChange to work for my dropdownlist. It doesn't seem to work, when I debug, I can see that the page is doing a PostBack but the method that suppose to be taking care of the select index change doesn't seems to be fired. I notice that there is no "handles" in many post so I was just wondering why it doesn't have it?On postBack I didn't rebuild the list so the selectedIndexChange value shouldn't reset to 0.Sub ddlAccess_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs) ''handles ......?" ...
I am placing a dropdown list in the footer of a DataGrid like this:
[Code]....
In my code behind file, in the myDDL_OnLoad event handler, I call to the database, populate a SqlDataReader, and set the DDL's datasource to that datareader. I define what data columns should be used for the DataValueField and DataTextField of the dropdownlist. Then I call the DropDownList's DataBind() method. Everything works without error. But, when the dropdownlist is displayed, it has blank lines in it.
By that, I mean if 8 records are loaded into the dropdownlist, it will expand to a size appropriate for 8 rows but, it will be empty. there is no text in it.
Has anyone seen this type of behavior before? This dropdownlist is in the footer of a dynamically loaded ajax update panel so, it is difficult to see the source code to see what values are in the html element rendered to represent the dropdown.
I have a ASP DropDownList that gets populated on the Page_Load event, after i select an item and hit a button the selected item gets cleared and the first item in the DropDownList gets selected. (The DropDownList is only populated when the page is not postback)
if (!IsPostBack) { List<Country> lCountries = new List<Country>(); List<CompanySchedule> lCompanySchedules = new List<CompanySchedule>(); this.Load_Countries(lCountries); [code]...
I have two dropdownlists ,selecting the first dropdown causes postback and second dropdown gets binded...Why does the selected value of the first dropdown,once again selected does not cause postback?
What I am looking to do is have a page with 2 seperate datagrids on, I want to be able to add the selected rows from DataGrid1 into DataGrid 2 either with a button click or using drag and drop functionality (Im guessing this would require javascript and I have no experience with this language, is it difficult to learn or could I just alter code from elsewhere?). Once the row is added into DataGrid2 I would like to be able to add some information, such as Quantity and DateDue (could this be added in a pop up box when the part is added?) Also I would like fields in DataGrid1 to be based upon a search with several different options that the user specifies, i.e the ability to search based on project number, however it would return eitheer parts or assemblies depending on a check box selected. I have very limited programming knowledge but Im guessing I would be able produce a query based on the inputs, but in order for this to work wouldnt the page to postback everytime an option was changed.
After this, the text box continues to work correctly, but the _state member does not pick up the posted back values and instead just sticks to the declared value. I've checked the raw posted values in the Request object, and the new value for the list's UniqueID is there, but _state doesn't pick it up.
I am having a 2 dropdown list, in the first dropdown I have 3company names,for each company I am having separate tables,every table have a empcode, if the user select the company name in the 1st dropdownlist, as per company selected the 2nd dropdownlist it will fill the list of employee codes as per the selection..
One selects items from the dropdown lists and click the Search button.
The ListView displays all the entries that match the criteria.
STEP 2:
Each entry in the ListView is clickable to select more details in the FormView.
Everything works perfectly well. However I'm testing the selected values after each postback based on the following script:
[Code]....
Now after STEP 1 (Search button) I get the selected ddl values. GREAT so far.
However in STEP 2 and in order to get the selected value of theListView I have to click twice on the same entry in the ListView. The ListView1.SelectedValue is returning 0 after the first click. The correct value is displayed after the second click.
