Forms Data Controls :: Recreating Selectedindex After Selectedindexchanged?
Feb 10, 2011
I'm trying to create a dynamic table (inside a gridview) with some objects. The initial creation is fine, and I store all the selectedindexes in viewstate to recreate it upon postback. This, seemingly, works fine as well, but...After the postback, when I get into the selectindexchanged even handler, I can see the new selectedindex, but the original control sending it is reset to it's initial value (because I reset them upon postback).Anyone know a fance way of doing this?Here's my code:
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Aug 18, 2010
I display a GridView where ther user can choose a Datarow with the select action. I catch the selection with the "SelectedIndexChanged" event of the GridView.
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My problem is I can't use the SelectedIndex to identify the Access Row because when the user uses paging/sorting the SelectedIndex is not the AccessRow. Somehow I have to identify the selected row the user chooses with the PrimaryKey in Access ("Number").
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Mar 1, 2011
I am having a problem with using A Gridview SectedIndex or value in a sql ControlParameter. When I select the row it does what I need it to except it shows that there is no data.
but if I add Default Value of 1 the data shows up, but it needs to read from the Gridview.
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I even added sqlDataSource.DataBind() in the SelectedIndexChanged Event to see if that would fix it but - No! I used it with a DropDown and it worked only when I use AutoPostBack = true of course.
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Nov 1, 2010
For every row in my 'table' I am manually creating, there must be a LinkButton to delete a database row that matches a column in the table. Because no 2 controls can have the same name, I've had to use a GUID to name them so they're all unique.
Problem is, right now when I click Delete, the page posts back with no changes, but I've been told that I need to recreate the controls - but how do I recreate them in Page_Load when their ID's are randomly generated? Here's my code:
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Jun 14, 2010
I wanted to create a dropdownlist that would trigger an asynchronous postback and update the Gridview inside the Updatepanel. However, no matter what I do, when the dropdownlist changes, nothing in the UpdatePanel will change, even the TestLabel....I've been banging my head against the walls for days on this -- why won't this work? When I remove the UpdatePanel code and triggers, all the code works, eg, you change the dropdownlist andthen gridview updates -- but it refreshes the page and this is why I wanted to put the Gridview inside an Updatepanel to make it look cleaner.[Code]....
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Feb 11, 2010
I'm having trouble binding my textbox to my dropdownlist. I got it to work but I don't think it is the correct way of doing it. I have my DDL bound to a datasource and populating everything correctly. However, I couldn't find a better way of binding my textbox to it besides using the FormView control and its counterpart, Templates (edit,insert,etc) It looks messy and i was hoping there was a better way of doing it. I've researched it online for awhile now but I couldn't understand how to implement for my situation.
My DDL has company names in it and the datasource has all the information from the table including what I'm trying to have my textbox pull (Address).
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Feb 25, 2010
I have dropDownList in EditItemTemplate in DataList which is used to choose value from possible ones.
To display cuurent value I used SelectedIndex='<%# (int)(QuestionType)Eval("Type") %>' inside he dropDownList.
But then I started to dataBind dropDownList dynamically and it stopped working...
Why? When does the code in SelectedIndex='<%# this code %>' works?
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Nov 21, 2010
LinQ / DropDownList gives error on selectedindex
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Dec 29, 2010
I have a datalist where each item consists of a textbox and a dropdownlist. I want to get the datakey value when a selected dropdownlist item changes. I can get the selected value of the dropdownlist, but I can't figure out how to get the key field value of the datalist row item that the dropdown resides in.
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Sep 2, 2010
I'm trying to keep these questions seperate for people searching after me, .
I have the following code on SelectedIndexChange of GridView1
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I have a drop down list that you can choose values from, and depending on which item you pick GridView1 changes, this all works correctly, and if I select one of he rows the SelectedIndex changes. My problem occurs when you choose a different value from the drop down list, GridView1 Changes accordingly, and by default a record is selected. But selectedindexchange is never fired again until I manually select another record from the gridview which is a problem.
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Aug 4, 2010
I want to select a row in my GridView based on a known data key value at runtime.
In other words, I have a data key value, 2 for ex., and the primary key value of one of the rows in my GridView is 2. How can select that row? (Without having to go through each row to find which one matches my key, then setting the SelectedIndex.
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May 25, 2010
I have loaded data into gridview from datatable which is in database.
I need to select any row from gridview to fetch the selectedrow values and need to display in corresponding textboxes.
but selectedindexchanged event is not firing, do I need to do any extra settings?
I want to fecth select index from the data loaded from database table.( not from manullay adding data to datarow and assigning datarow to datable and fanally to gridview- this is not the case)
onselectedindexchanged="GridView1_SelectedIndexChanged"
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May 26, 2010
I am populating a dropdownlist in a detailsView on Page_Load using a table adaptor as follows
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Jun 24, 2010
when i change page from page1 to page 2 I remember Dropdownlist in session
Session("Dropdownlist")=Dropdownlist
now when i go back to page1 I set the Dropdowlist the way what it was before i left page1
Dropdownlist=Session("Dropdownlist")
Everything its remember but when i load the page with my Dropdownlist again. The selectedindex shows default value in the control Dropdownlist.But it does remmeber old selectedindex.I got it wired with Gridwiew and gridwiew show Data by remmeber old selectedindex. Well generally I like to remember selectedindex when i go to a differente page and when i go back have it set in the control dropdownlist the way when i left the page
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Feb 20, 2010
i am having a radiobuttonlist in datalist and i am binding values to radiobuttonlist.. when i select particular radiobuttonlist, corresponding image should be displayed..i am having difficulty in setting default selectedindex for the radiobuttonlist
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Mar 11, 2010
I have a gridview in one UpdatePanel and a FormView in another UpdatePanel.
The FormView UpdatePanel refresh is triggered when the GridView SelectedIndexChanged event fires. This then displays the FormView. However when a user navigates to another page in the GridView or sorts the data then the GridView is refreshed and the SelectedIndex
is changed to nothing in the code behind via the GridView DataBinding event.
The FormView UpdatePanel does not refresh to reflect this. I have to manually set the FormView datasource to null and update the FormView UpdatePanel in the code behind.
My question is why doesn't my FormView UpdatePanel update when the SelectedIndex of the GridView is altered in the code behind.
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Jan 18, 2011
I'm trying to populate a datasource for a dropdownlist (which is actually in an insertitem template field within a detailsview on the same page) with a selectedvalue from a gridview. When I select a row in my Gridview 1, I get the "no value for a required parameter" message. ( and I have tried various alternatives... setting the selectedvalue of the grid to a variable... setting the selected value of the grid to a textbox nothing seems to work. It seems like this should be a pretty simple thing. I think I'm missing something obvious! Here is my code:
Field in Details view to be populated by the datasource:
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Jan 8, 2010
how to update the text within a textbox inside the same cell of a DropDownExtender and ListBox while the option the user clicks on inside the ListBox
Here is a code snip of the template field
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Then I also have this on the RowDataBound event of the gridview
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What I don't understand on how to do is tell which row the onclick event took place and in what column. Then I also need to figure out how to build the JS for the front end to handle this and update the proper rows / columns textbox
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Dec 27, 2010
I'm trying to populate a detailsview according to the selected row in a gridview. How do you choose what the selectedindex is? For example my sql statement is:
SELECT [Assignment_ID], [Staff_ID], [Client_ID], [Day], [Month], [Year], [Start_Time], [Job_Type], [Billable_Time], [Travel_Time], [KM_Travelled], [NC_Time], [SP_Time], [Billed], [Description] FROM [Assignment] WHERE ([Assignment_ID] = @Assignment_ID)
and @ assignment_ID is gridview.selectedindex
but when it runs I get the error:
Input string was not in a correct format.
Description:
An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.FormatException: Input string was not in a correct format.
Source Error:
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Stack Trace:
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Mar 9, 2011
I'm using a ListView (e.g topListView) with paged rows (using a DataPager). One of the topListView's features is when a user clicks on one of its rows, its SelectedValue property is used to populate a SelectParameter in another SQLDataSource control that populates another ListView (e.g. bottomListView). It's working fine. Even when the webpage first loads, the SelectedValue of first row of the topListView is successfully being used to generate content in the bottomListView.
However, when one of the DataPager's buttons is clicked, the SelectedValue seems to be ignored, and the bottomListView isn't refreshing. And yet, when you click a DataPager button again, it works. basically it's taking TWO clicks of the pager for the SelectedIndex to be read. I've tried assigning the SelectedIndex to 0 in the PagePropertiesChanged and PagePropertiesChanging handlers but no luck (even with calls to bottomListView.DataBind(); and/or SQLDataSource1.DataBind(); after index assignment).
assigning the index seems unecessary though, since top row content is being rendered correctly in a SelectedItemTemplate after clicking any DataPager button. to me that means the SelectedIndex is being set to 0 when the page is being re-rendered.
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Apr 12, 2010
I have been researching this issue for a couple of days and have found a lot written about it, but none of what I have found has fixed the problem I am having.
I work for a school system, and my principals are wanting to take a list of the staff members at their school and create staff lists for different activities they perform. I thought I would load the staff into Gridveiw1, and when they select a record have it move over into Gridview2 and "delete" from Gridview1.
I am loading my full staff into a datatable (SQL Server backend), and setting this datatable as my gridview1 datasource. At this point, it loads great, and cosmetically speaking sorts and pages fine. The problem occurs in the codebehind after a Sort or Page change has occurred -- when I select a record and move it over into Gridview2, it is moving the original record that was at that postion on Page 1 instead of the sorted or "new page" record.
So if the initial list comes in as:
Teacher 1
Teacher 2
Teacher 3
The sort button is hit so that the list now starts out like:
Teacher 7
Teacher 13
Teacher 5
If they select "Teacher 13" to be moved over after the sort, instead it is still moving over "Teacher 2" -- the initial teacher in that index before the sort.
The Gridview setup on my aspx page looks like this:
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My codebehind:
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Sep 7, 2010
My requirement is, if i click on Manage button of gridview then it should show all the data in the textbox from database.I have problem, It is working fine If contactusID visible="true" and when it is false then if i select row on gridview first time,its fine and if i select any row second time, i am getting error. There is no row at position 4 and my counter starts with 0, and i have 4 rows in my grid.Code:-
protected void gvAppContactUs_SelectedIndexChanged(object sender, EventArgs e)
{
mvDefault.SetActiveView(vModifyApp);
[code]...
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Feb 17, 2010
I have a dropdown list sitting on a user control and I need to evoke the SelectedIndexChanged from the dropdownlist. How do I make this SelectedIndexChanged event available on my UC?
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Sep 29, 2010
I have a GridView with a TemplateField where I'm hosting a button. The button has an event hanlder OnClick, so when it is clicked it will execute some code.The problem I'm having is that when I click the button in a row, the Button event handler is not excecuted right away. Instead, the GridView selectedIndexChanged is fired and then I need to click my button again to fire the button's event handler.So, is there a way I could know if the button or the row was clicked in the GridView SelectedIdexChanged event? And why the Button's event handler is not firering right away?
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Jan 16, 2010
I have a gridview that whenever i select the particular row, the gridview SelectedIndex command will set the particular row's value to a label. But the problem now i am facing is.. it does not set the value to a label.
Protected Sub AdminGridView_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles AdminGridView.SelectedIndexChanged
Dim row As GridViewRow = AdminGridView.SelectedRow
[code]...
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