Forms Data Controls :: Cannot Add Items To A Dropdownlist Within A LoginView Control
Mar 25, 2011
I have a Dropdownlist within a LoginView Control as follows:
[Code]....
And in my code behind I can successfully reference the dropdownlist as follows:
[Code]....
However as soon as I try to add an item to the dropdownlist it all falls apart: The (pseudo) code to add an item is:
[Code]....
The error I get is:
[Code]....
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Similar Messages:
Nov 15, 2010
I've put a DropDownList control within a LoginView control. I've got 2 SqlDataSource controls outside of the LoginView control, with the intent of databinding the items that comprise the ListItems of the DropDownList control, and another one for the data is stored in another table which has what was previously saved for the selection. However, when I've assign the SqlDataSource control to the DropDownList control's DataSourceID for the lookup table, I'm used to seeing the fields from the SqlDataSource control appearing in the DataTextField and DataValueField properties. However, they're not appearing there at all. Moreover, even when I try to type them in, its as if VS 2010 refuses to allow them.
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May 14, 2010
i am getting this error "A control with ID 'NewAssignTL' could not be found for the trigger in UpdatePanel 'UpdatePanel'. " i have 2 problems i cannot access my dropdownList control from code behind and i triggers cannot access the control.
my.aspx page
<asp:LoginView
ID="LoginView1"
runat="server">
<RoleGroups>
<asp:RoleGroup
Roles="Administrator">
<ContentTemplate>
<asp:DropDownList
ID="NewAssignTL"
runat="server"
AutoPostBack="True"
ToolTip="Select
team leader name"
DataSourceID="SqlDataSource1"
DataTextField="Description"
DataValueField="GroupID"
/>
<asp:SqlDataSource
ID="SqlDataSource1"
runat="server"
ConnectionString="<%$
ConnectionStrings:ApplicationServices %>"
SelectCommand="SELECT
GroupID, Description FROM aspnet_Groups WHERE (Active = 'True')">
</asp:SqlDataSource>#
</ContentTemplate>
</asp:RoleGroup>
</RoleGroups>
</asp:LoginView>
<asp:UpdatePanel
ID="UpdatePanel"
runat="server"
UpdateMode="Conditional">
<ContentTemplate>
my gridview is here
<Triggers>
<asp:AsyncPostBackTrigger
ControlID="NewAssignTL"
EventName="SelectedIndexChanged"
/>
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Sep 10, 2012
One of mine dropdownlist is inside a <AnonymousTemplate> and I unable to bind it.
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Sep 10, 2010
I've a datalist within the logged in template.On the page_load first I'm ensuring the visitor is logged in
[Code]...
[Code]...
However this doesn't work,I get the following error:Object reference not set to an instance of an object.
Highlighting:DataList1.DataSource = ds
If I take the loginview away then it works,but I thought the loginview1.findcontrol part would solve any problems.
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Feb 24, 2010
I've got a loginview, with a panel inside it.
On the onload of the page i like to en/dis able the panel. But the Panel, i get with this code::
Panel
PanelAppointment = (Panel)LoginView1.FindControl("PanelAppointment"
);
if(PanelAppointment !=null
)
PanelAppointment.Visible = false;
is always null.
But the panel is available in the generated code... , its placed in a rolegroup of the loginview.
How can i access it?
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Nov 18, 2010
I have a dropdownlist which get item from database (say this field has 10 records for this dropdown list.
I want the users are not restricted to these 10 items. What is the quickest way to do so the user can type in new values and insert into database ?
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Nov 18, 2010
I have a DropDownList with a list of orders. When an order is selected from the list I generate a GridView with details of that order. Within the GridView I call other databound controls and all works fine until I finish the orders in the DropDownList
I have tried to enclose the code within a if dropdownlist.items isnot nothing end if but it makes no difference
This is the code:
Protected Sub GridView1_DataBound(ByVal sender As Object, ByVal e As System.EventArgs) Handles GridView1.DataBound
If DropDownList1.Items IsNot Nothing Then
GridView1.SelectedIndex = 0 [code]...
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Jun 22, 2010
i have dropdownlist. After i loaded data from javascript to dropdownlist,i used dropdownlist.item.count but counter always null. how to refresh dropdownlist?
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Jan 11, 2011
i need to select multiple items in a dropdownlist. This is my code,
<asp:DropDownList ID="ddllocation" runat="server" Width="80px">
<asp:ListItem>Chennai</asp:ListItem>
<asp:ListItem>Madurai</asp:ListItem>
<asp:ListItem>Coimbatore</asp:ListItem>
<asp:ListItem>Nilgiris</asp:ListItem>
<asp:ListItem>Palaghat</asp:ListItem>
</asp:DropDownList>
How can i add tat option.
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May 24, 2010
In my project I have a listview which I am binding from code behind. Now I would like to add a droppdownlist for each item in listview. So my question would be:
Is there a way to populate my dropdownlist whit data which I have in a List?
Here is a bit of code to show how my listview looks like:
[Code]....
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Oct 13, 2010
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.
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Apr 9, 2010
environment: VS2008 When running below code the DDLKlient.DataBind() appends the whole set of names to the already existing list. I.e. I have 2 sets of names in the DropDownList!Question:? what can I do to prevent appending and just get 1 (one) set of names?? is there any refresh option?
Protected Sub DVKlient_ItemInserted(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.DetailsViewInsertedEventArgs) Handles DVKlient.ItemInserted
Dim connString As String
[code]...
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Sep 6, 2010
LoginView DropDownList4 = LoginView2.FindControl("DropDownList4") as LoginView;
DropDownList4.SelectedValue = "abc";
Why not find SelectedValue?
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Jul 21, 2010
I am trying to hide 2 buttons depending on the value in the dropdownlist. It works when the page is initially loaded but chokes when returning to the page sometimes. I have some pretty simple code in the Page_Load event within an If Not Page.IsPostBack statement
[Code]....
[Code]....
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Jan 18, 2011
I have a Gridview showing the MemberLastName, MemberFirstName, MemberBirthYear, MemberGender, MemberRelationship.
During Edit mode, I have managed to display a DropDownList for the Relationships.What I am trying to achieve now, is that, based on the Gender of the member I would like to limit the items in the Relationships dropdownlist.
e.g if the Gender is Male, then only display Male Relationships
What is the best way to achieve this scenario?Here is my snippet of code for the event. The code is commented out as it throws an exception.
[Code]....
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Aug 26, 2010
I have a series of dropdownlists on webform in ASP 4.0. The first drop down is filled upon load, and then when a user selects a value from that list, it populates the second dropdown. To accomplish this, I have a SQLdatasource with a parametersource of the first drop-down list control. This works great, except when a user changes their selection from the first drop down. It performs the query, but then adds the list of items to the ones that were already there from the previous selection, instead of replacing it with the new data. Here is the code:
[Code]....
Do I need to do something on selectedindexchanged to somehow "clear out" the previous datasource? I can't find anything about this online, although one person seemed to suggest it was related to using a master page. (which I am using).
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Jun 13, 2010
Trying to populating dropdownlist in LoginView from mysql db but am getting Object reference not set to an instance of an object error.
Protected Sub Page_PreRender(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.PreRender
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May 7, 2015
how to check whether a dropdownlist contains particular value for the below codei have a value name
manager="manogar1";
if(mydropdownlist valuecontains the value "manogar") {
} else {
}
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Sep 28, 2013
Populate items in DropDownList from TextBox Value in ASP.Net ...
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Aug 26, 2013
<asp:DropDownList ID="myDropDownList" runat="server"> <asp:ListItem>Aura </asp:ListItem> <asp:ListItem>Adrani</asp:ListItem> <asp:ListItem>Celsi M.</asp:ListItem> <asp:ListItem>Karilo</asp:ListItem></asp:DropDownList>
If I run the asp.net page this gives my normal out put like
Aura
Adrani
Celsi M.
Karilo
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Apr 24, 2014
How to insert,update,delete and search facilities provides the asp:dropdownList.
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Mar 14, 2014
I used below code for put scroll for Dropdown list
<script>
function onSelectMouseDown() {
document.getElementById("<%= DDLcity1.ClientID%>").size = 10;
}
</script>
I define label under DDL like below
Now problem is that when I click on DDL to see Item Label that I define jump to bottom of page I mean lable doesn't stay under DDL it jump bottom.
what should I do?
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May 7, 2015
With reference to : [URL] ....
No you cannot add a third parameter in the Dictionary. It contain Key Value pair data.But if you want to add third parameter then simply use DataTable and add these in the DataTable row.Name of Builder , Title Of Buidler , Builder ID
So how to acheive that task ? so far i did like this :
public void AddNewCMP(string PersonName , string PersonID , string PersonTitle) {
var dt = new DataTable();
if (ViewState["CMPDataTable"] != null) {
dt = (DataTable)ViewState["CMPDataTable"];
[Code] ....
Now on button click i want to add six drop down values to AddNewRow(value1,value2,value3) method .... how to do that ?
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Oct 7, 2012
I have a web in asp.net and code in vb and sql database. There is a dropdownlist ina page the length is too big. How can I set to multi row or some other kind....
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