C# - RadioButtonList SelectedItem Always First One?
Aug 12, 2010
I am using simple radiobuttonlist with four items, I have enabled viewstate and postback but whatever option I choose it always return first value.
Here is the code:
<asp:RadioButtonList runat="server" AutoPostBack="true"
EnableViewState="true" OnSelectedIndexChanged="Changed" ID="rbSlots">
</asp:RadioButtonList>
ListItem item = new ListItem(starthour + " - " + stophour + ds.Tables[0].Rows[i]["LastName"].ToString(), ds.Tables[0].Rows[i]["xavid"] + "¤" + ds.Tables[0].Rows[i]["xuserid"]);
and I have RadCalendar, on which SelectedDateChanged Event I populate the radlist
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Jun 15, 2010
I have several lines of code like this:
[Code]....
How can I do this?
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Apr 12, 2010
Here is my attempt:
[Code]....
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Feb 18, 2010
here is (part of, its 50 items long) the radiobuttonlist
[Code]....
and i use the value of the 'Value' attribute to make a selection
[Code]....
then I want the 'text' property of SelectedItem to be in the subject line of an email
[Code]....
but no matter what i do, it uses the 'Text' property of the first item in the list that has the same 'Value' as the one from the selection
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Oct 14, 2010
I was wondering, is there a way to set selecteditem in RadioButtonList using javascript (Client-Side) ? Is there an easy way to do that ?
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Sep 29, 2012
I have 2 radiobutton list in my page when I didn't select item from radiobuttonlist it make below error
Object reference not set to an instance of an object. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.Source Error:Â
Line 834:
Line 835: string RBLsh = RBL2.SelectedItem.Value;
Line 836: string RBLgh = RBL1.SelectedItem.Value;
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Feb 2, 2011
I have a radiobuttonlist inside a datalist itemtemplate and i need to bind the radiobuttonlist dynamically from database I have tried to bind it inside itemdatabound event of datalist but it the result is always duplicated according to the fields in teh database.
for more information:
the database has two columns one for questions and the other is for choices , for the first question with id lets say 1 there are 4 choices, when the radiobutton is binded the result appears to be 4 times duplicated ?
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Dec 9, 2010
I have a dropdownlist is set to '--Select Item--' when the form is loaded first time. I don't see the Selected Item getting selected after I submit the form. It is set to '--Selected Item--' again.
<%= Html.DropDownList("lstDetails", new SelectList((IEnumerable)ViewData["DetailList"], "ID", "Details"), "--Select Item--")%>
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Sep 28, 2010
I am populating a DropDownList control as follows -
public partial class UserControls_PMS_Send2DeliveryTeam : System.Web.UI.UserControl
{
protected void Page_Load(object sender, EventArgs e)
[code]...
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Mar 29, 2011
I have a dropdownlist in a Usercontrol defined in a table as:
<asp:DropDownList
runat="server"
id="lstDIDFCM"
Width="135px"
AutoPostBack="true"
></asp:DropDownList>
i have the AutoEventWireup="True"; I have a breakpoint in the code behind on the SelectedIndexChange event.
The event does fire but the index is not changing. No matter what item in the list I select, the SelectedIndex always = 0. The list is bound to a dataset and the DataTextField and DataValueField are both set to the same value. Why is the index and SelectedValue not updating?
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Jun 5, 2010
First post here, I usually try not posting until I am completely lost. I have a webform that gets a dynamic dropdownlist added to a placeholder in a method during pageload. During a submit of the page, I want to be able to get the selectedItem in the DropDownList that was also added dynamically from a DB. I know the ID of the DropDownList, and I know the Value of all the ListItems. Although when I am trying to use FindConrol(ID), and assign it to a DropDownList, the Control comes back Null and I get an error saying "Object Reference not set to and Instance of an Object", I believe because its not finding the control.
[Code]....
Can anyone show me how to use this to get access to the properties of the dynamic DropDownList properties, especially the ListItems within.
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Sep 10, 2010
I am having a Gridview named GridViewGender with a RadioButtonList with it
Inline code is
<asp:GridView ID="GridViewGender" runat="server"
AutoGenerateColumns="False"
Width="494px" DataKeyNames="ren">
<Columns>
[Code]....
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Apr 11, 2010
I give up. After many hours of scouring the internet, cannot find a simple example of binding a simple object to a ListView and figure out which one is selected in the SelectedIndexChanged event.
Many people talk about the SelectedItem and SelectedItems properties; which somehow, according to intellesense, do not even exist on my ListView. I must have a "special .Net build" :)
If I have a collection of "Books" bound to a ListView. How do I get the "selected book" in the SelectedIndexChanged event? (Multiselect = false)
I would think it's something like:
Book MyBook = (Book)ListView1.SelectedItem
I'd even settle for
Book MyBook = (Book)ListView1.SelectedItems[0]
No such luck. My very special ListView does not seem to have either property.
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Oct 28, 2010
So here is the problem , Is it possible to get the "SelectedItem.Text" of a binded dropdownlist? because everytime I'm getting null Even though I'm having
items in the dropdownlist.
I'm getting the items that I want in the dropdownlist but I can't find out which one is selected.
[Code]....
here is my aspx code:
[Code]....
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Mar 15, 2011
I don't know how to go about this. I have web form with two dropdown lists. one named Recruiter and the other Account manager. I have two two SQL tables named Perm_Commision_Lookup & UserList. The Perm_Commision_Lookup table does not contain recruiter's email, so I decided to Inner Join it with UserList table which contain recruiter emails. The LookupValue column from the Perm_Commision_Lookup table is what's displayed to the end user and the pk_LookupID column is the one that's inserted into the database. What I want to achieve is this: When a user select let's say "John Doe" from the Recruiter dropdown list, I want to send out an email to John Doe and at the same time insert the selected value (pk_LookupID) into the database. I set the DataTextField="LookupValue" and DataValueField="pk_LookupID but how to get the User_Email is another problem. Below is my SQL select...
SELECT Perm_Commision_Lookup.pk_LookupID, Perm_Commision_Lookup.LookupValue, UserList.User_Email FROM Perm_Commision_Lookup INNER JOIN UserList ON Perm_Commision_Lookup.LookupUserName = UserList.GM_Username
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Apr 13, 2010
I've been pulling my hair out over this one... I've searched on the net and even in the forums, but can't seem to come up with an answer for a simple question.I tried the following code inside my html to get the selected value that comes from our database into the grid and it doesn't work. I am positive that a value exists for the itemType. It is 1. Instead of Checked, I tried SelectedItem and SelectedIndex. Neither of those worked.
<code>
Checked='<%# DataBinder.Eval(Container.DataItem, "itemType")%>'
</code>
I erased the above code from my grid and inside the ItemDataBound event, I placed the following code, but don't know what other code I should place next after it. I know the value inside "itemType" is 1 by debugging it.
<code>
RadioButtonList itmtype = e.Item.FindControl("rblItemType") as RadioButtonList;
</code>
How can I simply find the selecteditem in the list coming back from the database inside the itemdatabound event?
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May 27, 2012
Object reference not set to an instance of an object.
Â
if((drpdept.SelectedItem.Text != "--Select--")|| (drpdept.SelectedItem.Text !=null))
{
}Â
i hve above line but i get Object reference not setÂ
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Dec 12, 2010
I am using VB.NET and I can't compare the radio button lists selectedItem.Value to a string, it doesn't work...here is the code: (I have also tried selectedValue it does not work either)
Response.Write("RB1: " + rblOne.SelectedItem.Value + " FML FML FML<br/>")
If rblOne.SelectedItem.Value = "No" Then
Response.Write("Hey there!<BR/>")
pnlR1.Visible = True
If NumberOfAnswers = 7 Then
Score = Score - 10
ElseIf NumberOfAnswers = 6 Then
Score = Score - 15
Else
Score = Score - 20
End If
Response.Write("Score: " + Score.ToString)
End If
Response.End()
If rblOne.SelectedItem.Value = "No" Then is not working, notice the debug statements in there, here is the output: Why won't it evaluate that rblOne.SelectedItem.Value = "No" !?!?!? I tried rblOne.SelectedValue, that doesn't work, AND I added .ToString to both
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Jan 18, 2011
I am using the following code :
Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles DropDownList1.SelectedIndexChanged
Response.Redirect("memberlogin.aspx?d=" + DropDownList1.SelectedValue.ToString)
[code]...
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Nov 20, 2010
Change selecteditem of ddl on click button
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Mar 23, 2010
I am having 3 ListBoxs(LB1,LB2,LB3).In LB1 I am binding the names of Courses through database.The code is shon below...
da1 = new SqlDataAdapter("SELECT COURSE_ID,COURSE_NAME FROM Course_Mst", con);
DataTable dt1 = new DataTable();
da1.Fill(dt1);
lstCourse.DataSource = dt1;
lstCourse.DataValueField = "COURSE_ID";
lstCourse.DataTextField = "COURSE_NAME";
lstCourse.DataBind();
Whenever I select particular course in LB1 all the content related to that course will be binded in LB2.The code is shown below.....
protected void LB1_SelectedIndexChanged(object sender, EventArgs e)
{
da2 = new SqlDataAdapter("SELECT SPEC_ID,SPEC_NAME FROM SPEC_TRANS WHERE COURSE_ID="+Convert.ToInt32(lstCourse.SelectedValue)+"", con);
DataTable dt = new DataTable();
da2.Fill(dt);
lstSpecilization.DataSource = dt;
lstSpecilization.DataValueField = "SPEC_ID";
lstSpecilization.DataTextField = "SPEC_NAME";
lstSpecilization.DataBind();
lstSpecilization.Focus();
}
I am having a ADD button.In LB2 I can select multiple items.When I select multiple items in LB2 and click on ADD all the selected items will be binded into LB3.The code is shown below...
protected void btnAddCourseDetaisl_Click(object sender, EventArgs e)
{
for (int intLoopIndex = 0; intLoopIndex <lstSpecilization.Items.Count ; intLoopIndex++)
{
if (lstSpecilization.Items[intLoopIndex].Selected)
{
ListItem li = new ListItem(lstSpecilization.Items[intLoopIndex].Text, lstSpecilization.Items[intLoopIndex].Value);
LB3.Items.Add(li);
}
}
}
My problem is when I select a item from LB2 and click on ADD the selecteditem is added to LB3 but if I select the same item and click on ADD the items are again added to the LB3.I want to prevent this.Pls respond me ASAP.
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Sep 13, 2010
Why I am unable to setfocus to my list box if the index > 820
My list box contains 2000 items and the index is not able to set the focus if the index > 820
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Jan 18, 2011
I am using the following code :
Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles DropDownList1.SelectedIndexChanged
Response.Redirect("memberlogin.aspx?d=" + DropDownList1.SelectedValue.ToString)
End Sub
but DropDownList1.SelectedValue.ToString expression returns the TEXT of the selectedItem.
Here is the dropdownlist aspx side :
<asp:ListItem meta:resourcekey="ListItemResource1" Text="Turkçe" Value="tr"></asp:ListItem>
<asp:ListItem meta:resourcekey="ListItemResource2" Text="English" Value="en"></asp:ListItem>
<asp:ListItem meta:resourcekey="ListItemResource3" Text="Russki" Value="ru"></asp:ListItem>
<asp:ListItem meta:resourcekey="ListItemResource4" Text="Français" Value="fr"></asp:ListItem>
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Apr 29, 2010
why listview selecteditem templete call the "select qry" method two time..?
i used objectdata source for show selected item templete which use select method of dataaccess leyer..
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Nov 16, 2010
I have two dropdownlist's.DropDownList2(not bound to a datasource) and DropDownList3(bound to a datasource)
On change on input in one dropdownlist some content in the other Dropdownlist should change. For that i had used the logic as.
Autopostback is enabled for both this controls.
protected void DropDownList2_SelectedIndexChanged(object sender, EventArgs e)
{
if (DropDownList2.SelectedItem.Text == "Stamp")[code]....
Now the problem is when i select DropDownList2.SelectedItem.Text == "Reg" STA and STM are not present. I want STA and STM values back in the dropdownlist on selection of 'Reg'.
When i first load my page and select 'Reg' all the values in DropDownList3(including 'STA' and 'STM') are present and than when i select 'Stamp' the values 'STA' and 'STM' are lost(as shown in the code). Now again when i select 'Reg' this values are not there, i want this values to be present again. What do i have to do?? Do i have to bind it again to database?
Is there any other logic for it to be used in a different way ?
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