Forms Data Controls :: Need An Event Handler For DropdownList SelectedIndexChange Datagrid?
Aug 11, 2010
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 ......?"
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I have a Gridview that provides the user the student name for a particular class, a dropdown list to enter grades. If a grade of 'U' is given, a textbox appears in which the last day of attendance must be listed.
It works... though not as conviently as it could; the faculty would like to be able to tab from one dropdownlist to next in succession.
On each ddlGrades changes I write the value to the database and if a 'U' was chosen, display the textBox... but I can't figure how to set focus on the next ddlGrades control, or even the same ddlGrades control that initiated the postbock.
Below is my simplified .aspx followed by the codebehind
I wanna execute same functionality for all DataGrid controls in my application for example.. inserted event handler. but without calling it manually. I mean to be called automatically.Is there anyway to do that ?
I have one Datagrid with Footer. Footer Row Contains Input fields with one Button to add New Values. I have button click event but not getting fires. my code follows:
I have a page that contains dynamically generated Dropdown List controls and I want thant the dynamic dropdown list perform an AutoPostback to fill some other field using the value selected. This is the code I'm using to create dynamically the control:
[Code]....
Control is correctly filled and rendered on ASP page but, after selecting a value, the page is reloaded (AutoPostBack is called) but the control is not diplayed and the sub is not called. I put a breakpoint into the ChangeValue sub but anything happens.
I read on some post that handler for the first DropDownList is not necessary but, how is it possible to tell DropDownList to call my sub after changevalue?
I have DropDownList inside GridView. Now I would like to add event handler for dropdownlist which would react on SelectedIndexChanged.I'm nesting DropDownList inside GridView by using RowDataBound event for GridView.(http://www.highoncoding.com/Articles/169_DropDownList_Inside_GridView__Method_1_.aspx) and tell me how to add event handling for dropdownlist
Protected Sub ddl_selectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs) Dim a As String = "" 'this does not get fired End Sub <asp:GridView ID="GridViewAssignment" runat="server" BackColor="White" BorderColor="White" BorderStyle="Ridge" BorderWidth="2px" CellPadding="3" CellSpacing="1" GridLines="None" Width="100%"> <RowStyle BackColor="#DEDFDE" ForeColor="Black" /> <FooterStyle BackColor="#C6C3C6" ForeColor="Black" /> <PagerStyle BackColor="#C6C3C6" ForeColor="Black" HorizontalAlign="Right" /> <SelectedRowStyle BackColor="#86A4CA" Font-Bold="True" ForeColor="White" /> <HeaderStyle BackColor="#808080" Font-Bold="True" ForeColor="#E7E7FF" /> </asp:GridView> Protected Sub GridViewAssignment_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridViewAssignment.RowDataBound Dim dateApplicationCreatedCell As TableCell = e.Row.Cells(0) 'app created on Dim typeOfReview As TableCell = e.Row.Cells(7) 'type Dim QCCell As TableCell = e.Row.Cells(8) 'qc Dim dateReviewAssignedCell As TableCell = e.Row.Cells(9) 'date assigned Dim reviewerNameCell As TableCell = e.Row.Cells(10) 'reviewer Dim dateReviewCompletedCell As TableCell = e.Row.Cells(11) 'date completed review Dim ddl As DropDownList If e.Row.RowIndex <> -1 Then If dateReviewAssignedCell.Text.Trim = " " Then dateReviewAssignedCell.Text = Now.Date End If Dim sqlCondition As String = String.Empty If dateReviewCompletedCell.Text.Trim = " " Then Dim nameToSelect As String If reviewerNameCell.Text.Trim <> " " Then Dim dateReviewAssigned As Date = dateReviewAssignedCell.Text Dim elapsedSinceAssigned As Long = DateDiff(DateInterval.Day, dateReviewAssigned.Date, Now.Date, Microsoft.VisualBasic.FirstDayOfWeek.Monday, FirstWeekOfYear.Jan1)...............................
I understand I need to load my dynmaic control on every postback and preferrably in Page_Init(). But my dyanmic controls are loaded from a dropdownlist selectedindexchanged event handler. Now after any postback, my dynamic controls are gone. How would I force it to load on every postback ?
THE LAST METHOD _insertin is NEVER FIred UP. The Update pases correctly ands I will not give the code for the object data source.
My purpose is to include code into on insert code that assign value to a column .
Can you take a look. I'm novice to ASP.net .I'm A DBA and would like to Use ASP for UI to May database. I dont have the goal to become profesional in that field.
User double clicks on a grid and a new Window Opens...User enters information and then I am going back and updating parts of the record.Once the code comes back from client-side onDblClick I am expecting the SelectedIndexChanged method to fire (so I can do additional server side processing) but it doesn't. Is there something I am missing?Right now my onDblClick event looks as followed:
Is there a technical reason for the existence of Page.PreLoad or is this just convenience to have a place where you can neatly place code that always have to be executed before the Load code? Is there a difference between adding code in the PreLoad event handler and adding code at the top of the Load event handler? And what would be a typical scenario where you use PreLoad?
I want to add an event handeler that tell me wich row had been selected and highlighted it too. I tried many times, but usually face this error "No overload for 'Grd_ServersInfo_CheckSelectedRow' matches delegate 'System.EventHandler' ". Could any one paste the right code lines to handel this event
I'm creating a GridView in code. I can successfully attach handlers for Editing, and CancelEditing. RowUpdating never runs, however. Instead, if the GridView is in a Panel, the Edit handler is called when Update is clicked (and this is the command name I get back on the Update click, too). If the GridView is not in a panel, then the Cancel handler is called when Update is clicked (again, this is the command name I get back from clicking Update). I've searched high and low for a reason why the RowUpdating event is not getting called, and I can't find one. Does anyone out there haveHere is my code (My actual code is much more involved than this, but for testing purposes, I extracted the following code and stuck it in a new project to isolate my problem):
protected void Page_Init(object sender, EventArgs e) { if (!IsPostBack)
I put it down for a few weeks to work on other things, but started working on it again because I need to get it to work.
Anyway, I figured if I wanted to put a button in a datalist all I had to do was:
[Code]....
And then in code behind:
protected void datalist1_ItemCommand(object source, DataListCommandEventArgs e) { if (e.CommandName == "submit") { // code here } }
This is what everyone else says to do when I search google. I put a break on the event but the event never fires. Does it matter if I am using VS 2010 and .net 4.0?
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.
A DetailsView in Insert mode has all fields cleared after events such as the following:
1. Clicking New. 2. Clicking Cancel. 3. Clicking Insert (if the default mode is Insert).
I have some fields linked to ViewState and they are populatd at PreRender event handler. I am wondring if there is a single place where all relevant ViewState elements can be cleared instead of doing this in all possible relevant handlers such as ItemCreated, ItemCanceled, ItemInserted, etc.
I have the following code for my radiobutton selectedindexchange, i have a hidden field in the gridview with the cid( which is the unique id for the records, the last column in the gridview is the radiobutton and i want to update my record with the value of that radiobutton.
