On my .aspx page i want to be able to show and hide certain panels depending on user selections (radiobuttonlists).
For example in my aspx page i have;
[Code]...
But when I try to run the code I get;
"Object reference not set to an instance of an object" on this line If RadioButtonList1.SelectedItem.Equals(3) Then
I have a panel inside a formview that is supposed to become visible when a checkbox (also inside the formview) is checked. I am able to access the controls, but I'm not sure how to actually make it work. This is my codebehind so far, I know it's not right, but it gives a basic idea of what I'm trying to do.
Protected Sub FormView1_DataBound(ByVal sender As Object, ByVal e As System.EventArgs) Handles FormView1.DataBound
If FormView1.CurrentMode = FormViewMode.Edit Then
Dim checkGenEd As CheckBox = FormView1.FindControl("checkGenEd")
Dim panelOutcome As Panel = FormView1.FindControl("panelOutcome")
If checkGenEd.Checked = True Then
panelOutcome.Visible = True
Else
panelOutcome.Visible = False
End If
End If
End Sub
[Code]....
and im not getting the result i expected =
I have a page with several panels. panel1 has a drop down list to select client. panel2 has two drop down lists to select facility1 and facility2. I want panel 2 to be disabled (both facility1 and facility2 drop downs disabled) until a selection has been made in panel1 drop down list. when a client is selected from dropdownlist1, I want to enable both dropdown list2 and 3 in panel2.
View 7 RepliesI have an "articles" page that holds a radiobutton list and a textarea. when the user selects a radio button, the text area is populated. now the users wants to be able to point to an article via a url link. (everything is dynamic and being pulled from a db source)
by using a 3 party tool i was able to grab the exact http request (below) that will link to the users' selection. the problem is the url is extremely long. is there another way to link to the radio button selection? that way i can just modify the query string to fit a specific format.
[code]....
how to reset radiobuttonlist selection and a textbox in a updatePanel after submit?
View 1 RepliesI have a radiobutton list that changes the contents of a dropdownlist when the selected radiobuttonlist index is changed using the SelectedIndexChanged event. Both controls are within the same updatepanel and both have autopostback set to true.
For some reason when I change the dropdownlist and cause a postback, the radiobuttonlist change event fires and repopulates the dropdownlist which effectively cancels the selection made in the dropdown.
I know something simple must be causing this behaviour but I cannot think what and my debugging efforts are not shedding any light thus far. I have tried putting a breakpoint on every procedure in my form and the first event that fires is the radiobuttonlist SelectedIndexChanged event so nothing in my server side code seems to be doing this which suggests it is something in the markup but I can't think what.
I need to achieve an effect of a read-only textbox, where when the user clicks on the textbox a popup grid control appears, after the user has made a row selection the text box is populated.... Looking at the AJAX Toolkit model it seems like a CustomExtender would be the way to go, but I can find no documentation on how to build such a thing, so I am looking at improvising.
Here is my process (which is still not working):
Using either an ASP.NET TextBox or HTML <input type="text" runat="server"> control I need to able to trap on the onclick event and then set an ASP.NET Panel control Visible="true". I have tried placing my GridView control inside a <div> and using style properties to set it to hidden and using a client-side (javascript) event handler on <input type="text"> onclick event setting the style property to visible, this does not work correctly. It results in a empty place-holder like grid that popualtes on click (I suspect this is because the DataGridView lives inside a ASP.NET Panel)
I would like to be able to call a server-side method from inside my client-side JavaScript function. I seem to recall from Microsoft AJAX 1.0 docs a way to RegisterClientScript or some approach that allows this and can not find anything on this being supported with the ControlToolkit/MS AJAX 2. If I can do this I could set my ASP.NET Panel Visible property to true and then call Update() on it's UpdatePanel parent which should give me exactly what I'm looking for.
I have always used VB for my .NET programming but have recently migrated to C#. I have a really basic problem that I don't understand and am hoping someone can point out why I'm having this issue.
I have a panel which has visible = false by default. Upon a click event of button, it checks current visibility and sets true / false based on current value. I'm getting the above error with the following code, but do not know why. The same code works in VB!
[Code]....
How can i make a control required to put input depending on the radiobuttonlist selection? Let me try to clarify a bit more. I got 2 radiobuttons, if one gets selected, nothing else has to be done. But if the otherone gets selected, a textfield must have some input too.
View 2 RepliesHow to change visibilty of panel based on imagebutton mouseover and mouseout here, i have panel1(Panel) and btnimg2(imagebutton) i want to show(Panel1.visibility=true) when mouseover happens on imagebutton and Panel1.visibility=false when mouseout on imagebutton
View 1 RepliesI have a search page with a TextBox that allows someone to type in a search term and press enter. (Which fires TextChanged). I have a DropDownList that specifies the kind of search that will be performed. It is defined in the markup as follows:
<asp:DropDownList ID="lstSearchType" runat="server" AutoPostBack="false">
<asp:ListItem Value="0">Last, First</asp:ListItem>
<asp:ListItem Value="1">Last</asp:ListItem>
<asp:ListItem Value="2">First</asp:ListItem>
<asp:ListItem Value="3">Liberty ID</asp:ListItem>
<asp:ListItem Value="4">E-mail</asp:ListItem>
<asp:ListItem Value="5">Telephone</asp:ListItem>
<asp:ListItem Value="6">Birthday (exact m/d/yyyy)</asp:ListItem>
<asp:ListItem Value="7">SSN (exact ###-##-####)</asp:ListItem>
<asp:ListItem Value="8">Address</asp:ListItem>
</asp:DropDownList>
As you can see, AutoPostBack is set to false, and there is no event hookup.
Pressing enter fires the OnTextChanged event for the TextBox, which performs a search and updates a GridView in an UpdatePanel. This UpdatePanel has its UpdateMode set to conditional and has one trigger: the TextChanged event of the search TextBox.
It's very simple.
And it works beautifully, almost.
Whenever I change the search type, the very next search does a full postback. All subsequent searches do partial postbacks (as desired) unless I change the search type again.
There is one exception to this rule: if I load the page and immediately change the search type, it doesn't do a full postback. So the first change of the DropDownList before any postback (full or partial) does not trigger a full postback.
Full Disclosure: I'm doing a lot of JavaScript to change the appearance of the gridview during async requests. I don't detail it here because it seems unrelated. This problem only occurs when a DropDownList with no JavaScript wired up is changed.
I have two dropdownlists on my page that are related to one another, and are built dynamically. I did not write the original code, but I believe it is using AJAX so the whole page doesn't postback when the ddl selection changes. The first ddl is Status and the second is ContractType. Here is the code for the event handler:
Code:
protected void Status_SelectedIndexChanged(object sender, EventArgs e)
{
try
{
DropDownList status = (DropDownList)sender;
string selectedStatusId = status.SelectedItem.Value;
[Code] ....
Here is some of my debugging info:
? view.Count
4
? view.Table.Rows.Count
20
? contractTypeDropDown.SelectedValue
[Code] .....
I commented out the event handler since this snapshot, just to see what would happen, but when I was hitting it you can see what ex.Message was. I don't understand why it says the SelectedValue is invalid when I see the selected value is "E " and that is one of the four items in the ddl.
How can I force back focus on to selected radiobuttonlist item in the updatepanel? It keeps loosing focus when an item got selected.
View 3 RepliesIs there a way that we can change the color (which is defaulted to blue) when the items in the list box are selected? If so can you provide me a sample for it?
View 1 RepliesI try to set the selection in the radiobuttonlist accordingly to data retrieved from the database.
This is not working (the mydata.gender contains "Mail")
mygender = myfatality.gender
I got 3 radion-buttons on the view called:
- Taxi
- Train
- Bus
The model passed has a property called "Transport" of type String. In the action, if I set the property as 'Train', then the view should set the radio-button 'Train' checked. ie.
Action:
model.Transport = "Train";
How do I do that in the view to make the radio-button Train checked?
I am not sure how to fine tune this, but it seems to me like it should be rather simple. I have a RadComboBox on my page that only has two possible values:
[Code]....
When the user changes it to "Joint" I want the asp panel named 'CoApplicant' to become visible. If changed back, then hide again. Here is my javascript code which is not working:How do I hide that panel based on the selection?
is there any way for changing proporty of a component ,such as imagesrc of an image item , from another page?
my index page has slided into 3 pieces with frames. and i wanna change the src of an image by loading event from a page at another frame.
I was wondering whether in ASP.NET it is possible to change properties of bunch of controls in one operation. Of course there are probably many ways around this, but does anybody know an elegant solution to this?
Example pseudo-code
First Name
<asp:TextBox runat="server" ID="tbxFirstName" ControlGroup="Editable" />
<asp:Label runat="server" ID="lblFirstName" ControlGroup="ReadOnly" />
Last Name
<asp:TextBox runat="server" ID="tbxLastName" ControlGroup="Editable" />
<asp:Label runat="server" ID="lblLastName" ControlGroup="ReadOnly" />
protected void ChageMode(bool isReadOnly)
{
ControlGroups["Editable"].ForEach(c => c.Visible = !isReadOnly);
ControlGroups["ReadOnly"].ForEach(c => c.Visible = isReadOnly);
}
How to visible Panel on dropdown selected value with out Reload page...
View 1 RepliesI have ASPxDataView and ASPxRadioButtonList within item template. i also have two SQLDataSource's (first fill ASPxDataView, second ASPxRadioButtonList). They are using other database tables connected with the foreign key. Is there any way to pass parameter to my second sqlDataSource (id) to fill RadioButtonList property ? i mean select * from TABLE2 where id = @id ; (@id is a value from TABLE1 which is a value of column returned by first sqlDataSource)
View 3 RepliesI have the following scenarion. I have a range of drop down menus where a clietn can select. The code below is wrapped in an update panel but without this, the button click fires a method to retrieve the number of products. So for example, an item is selected from ddlCategory, the btnValidate is clicked and the label returns the number of products within that category.I have the following code for an update panel - I'm just not sure how to implement if effectively.
<asp:UpdatePanel ID="UpdatePanel1" runat="Server">
<ContentTemplate>
<asp:Label ID="lblSearchResultsStatus" runat="server" Text="Number of results found: "></asp:Label>
<asp:Label ID="lblSearchResults1" runat="server" Text=""></asp:Label>
<br />
<br />
<asp:Button ID="btnValidate" runat="server" Text="Validate Search"
OnClick="btnValidate_Click" Width="120px" />
</ContentTemplate>
</asp:UpdatePanel>
How do I go about wiring the update panel so that when a drop down list item is selected, the buttong is effectively clicked?
I have a asp:ListBox wrapped inside an asp:UpdatePanel. The list box contains Bus Codes. If I select AH, for example, and then scroll down to select XY, the listbox jumps back up to the top of the list instead of staying on XY. Listbox's autopost back is set to True. As I need to get selected values and then pass it to another web page to display a crystal report. The report web page is opened using JavaScript Window.Open and on page load of the web page that contains the listbox this JavaScript is added to a button. Is there a way I can stop my list box jumping back to the 1st item?
View 13 Repliesi have a list box, a command button and a grid
when i click a particular record / or multiple records on the list box and then cclick the command button the records r transferred 2 the grid
i also have custom paging, the paging shld ocur as many times i clcik the command button
i have used updatepanel with the command button in it so that partial postback ocurs or there is no page flicker , but when i use update panel i get teh records in the grid but custom page is not working . it has no affect even if the records are added
if i remove update panel the paging works properly how do i manage it with update panel