I have a RadioButtonList on my page that is populated via Data Binding
<asp:RadioButtonList ID="rb" runat="server">
</asp:RadioButtonList>
<asp:Button Text="Submit" OnClick="submit" runat="server" />
How do I get the value of the radio button that the user selected in my "submit" method?
The ASPX code will look something like this:
<asp:RadioButtonList ID="rblist1" runat="server">
<asp:ListItem Text ="Item1" Value="1" />
<asp:ListItem Text ="Item2" Value="2" />
<asp:ListItem Text ="Item3" Value="3" />
<asp:ListItem Text ="Item4" Value="4" />
</asp:RadioButtonList>
<asp:Button ID="btn1" runat="server" OnClick="Button1_Click" Text="select value" />
And the code behind:
protected void Button1_Click(object sender, EventArgs e)
{
string selectedValue = rblist1.SelectedValue;
Response.Write(selectedValue);
}
Using your radio button's ID, try rb.SelectedValue.
Technically speaking the answer is correct, but there is a potential problem remaining.
string test = rb.SelectedValue is an object and while this implicit cast works. It may not work correction if you were sending it to another method (and granted this may depend on the version of framework, I am unsure) it may not recognize the value.
string test = rb.SelectedValue; //May work fine
SomeMethod(rb.SelectedValue);
where SomeMethod is expecting a string may not.
Sadly the rb.SelectedValue.ToString(); can save a few unexpected issues.
string radioListValue = RadioButtonList.Text;
radiobuttonlist.selected <value> to process with your code.
Related
I have a radio button list inside of an AJAX panel. Here is the radio button list:
<asp:RadioButtonList ID="RadioButtonList" runat="server" TextAlign="Right" AutoPostBack="true">
<asp:ListItem Text="Option3" Value="Option3" Selected="True" />
<asp:ListItem Text="Option1" Value="Option1" />
<asp:ListItem Text="Option2" Value="Option2" />
</asp:RadioButtonList>
I have a function that loads the value based on saved settings. It looks similar to this:
string selectedOption = savedRecord.RadioButtonListValue.ToString();
RadioButtonList.Items.FindByValue(selectedOption).Selected = true;
It only seems to correctly load the value if I haven't changed the selected option.
If I load the page, the load the settings it will correctly set to the saved option.
If I load the page, change the option, then load the settings it will not change the option.
I have tried with AutoPostBack set to true and false and it doesn't seem to change the result. Any ideas?
I have been able to hard code a value and it seems to always load correctly:
//Working
RadioButtonList.Items.FindByValue("Option1").Selected = true;
//Not-working
string selectedOption = savedRecord.RadioButtonListValue.ToString(); //"Option1"
RadioButtonList.Items.FindByValue(selectedOption).Selected = true;
Here are the combinations that I have come up with.
Please try the ASPX code will look something like this:
The ASPX code will look something like this:
<asp:RadioButtonList ID="rblist1" runat="server">
<asp:ListItem Text ="Item1" Value="1" />
<asp:ListItem Text ="Item2" Value="2" />
<asp:ListItem Text ="Item3" Value="3" />
<asp:ListItem Text ="Item4" Value="4" />
</asp:RadioButtonList>
<asp:Button ID="btn1" runat="server" OnClick="Button1_Click" Text="select value" />
And the code behind:
protected void Button1_Click(object sender, EventArgs e)
{
string selectedValue = rblist1.SelectedValue;
Response.Write(selectedValue);
}
I've searched all over the internet and i can't seem to find a solution to my little problem.
i got this radiobuttonlist where i get the selected value by saying:
RadioButtonList1.SelectedValue
This works great when trying to get the value
<asp:RadioButtonList ID="RadioButtonList1" runat="server" RepeatDirection="Horizontal" RepeatLayout="Table" CellSpacing="50">
<asp:ListItem Value="1" Text="Helt enig"></asp:ListItem>
<asp:ListItem Value="2" Text="Delvist enig"></asp:ListItem>
<asp:ListItem Value="3" Text="Hverken eller"></asp:ListItem>
<asp:ListItem Value="4" Text="Delvist uenig"></asp:ListItem>
<asp:ListItem Value="5" Text="Helt uenig"></asp:ListItem>
</asp:RadioButtonList>
But now i've come to the point where i would like to get the text also.
Usually i would just get it by saying:
RadioButtonList1.Text;
But for some reason i just get the "Value" again.
Does anyone know if there's a way to get the "Text" also?
RadioButtonList1.SelectedItem.Text
This should do it.
I have a code like this:
on.aspx page
<asp:ListItem Value="1"> 1</asp:ListItem>
<asp:ListItem Value="2"> 2</asp:ListItem>
<asp:ListItem Value="2" Selected="True"> 3</asp:ListItem>
<asp:ListItem Value="4"> 1</asp:ListItem>
</asp:DropDownList>
<br />
<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" />
on aspx.cs page
protected void Page_Load(object sender, EventArgs e)
{
//do something
}
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
}
here issue is that, when i click on button at that time DropDownList1_SelectedIndexChanged also firing.
as i gone thru and found that this happening due to same value for different itemtext.
<asp:ListItem Value="2"> 2</asp:ListItem>
<asp:ListItem Value="2" Selected="True"> 3</asp:ListItem>
I can`t do changes in value.
Is there any luck? or what the exactly issue is?
Thanks,
Vijay
Please check DropDownList AutoPostBack Property.
if AutoPostBack is true
Gets or sets a value indicating whether a postback to the server
automatically occurs when the user changes the list selection.
SelectedIndexChanged fires when the selection changes. It does not take into account the values or text being the same.
That is why it is named SelectedIndexChanged & not SelecteValueChanged OR SelectedTextChanged.
So if you want your SelectedIndexChanged event and also want that it does not fire if it has the same Value or Text. It would not be possible.
IMHO : Value OR Text should not be duplicated in a DropDownList. You should get rid of the duplicate values from the DataSource before binding it.
Make sure ViewState is Enabled on Web Page and add it on Page load
if (!IsPostBack)
{
//do code here
}
I have a page that contains a Repeater, which contains server control elements, within an UpdatePanel and while all other controls behave normally, the Drop Down control causes a full postback every time.
<asp:Repeater ID="rpt" runat="server">
<ItemTemplate>
<asp:SomeWorkingControl ID="swc" runat="server" />
<asp:DropDownList ID="ddl" runat="server" OnSelectedIndexChanged="ddl_SelectedIndexChanged" AutoPostBack="true">
<asp:ListItem Text="0" Value="0" />
<asp:ListItem Text="1" Value="1" />
</asp:DropDownList>
</ItemTemplate>
</asp:Repeater>
This is vaugely what my code looks like, the DropDownList control is actually in a UserControl, but the theory is the same.
If I apply an event to SomeWorkingControl then there is an Ajax postback and all is fine.
However, the event associated with the DropDownList causes a full postback! I know usually you would set an Async trigger for the DropDown, but since it is created in a repeater (and therefore I can not know how many there will be) so I don't really see how that could work.
Is there anybody who has experienced this before and knows a workaround perhaps?
Try to change this line:
<asp:DropDownList ID="ddl" runat="server" OnSelectedIndexChanged="ddl_SelectedIndexChanged" AutoPostBack="true">
for:
<asp:DropDownList ID="ddl" runat="server" OnSelectedIndexChanged="ddl_SelectedIndexChanged" AutoPostBack="true" ClientIDMode="AutoID">
Recently I had the same problem and I found out that the ClientIDMode can solve it.
Please have a look here: asp.net ClientIDMode Changes
I have a drop down list in UpdatePanel_2, it gets populated when Button_1 is clicked in UpdatePanel_1.
My ddlist markup is,
<asp:DropDownList id="drop1" runat="server" EnableViewState="true" AutoPostBack="true" OnSelectedIndexChanged="Drop1_SelectedIndexChanged" />
then code behind is,
protected void Drop1_SelectedIndexChanged(object sender, EventArgs e)
{ }
I also tried putting AutoPostback=true to my DropDownList, still no success.
I also added triggre to update panel 2 but no gain,
<Triggers>
<asp:AsyncPostbackTrigger ControlID="drop1" EventName="SelectedIndexChanged" />
</Triggers>
I am populating DropDownList using a button not PAGE LOAD METHOD PLEASE READ before answering.
Thanks
Check the data to populate the DropDownList in the Page_Load event and always check IspostBack:
if(!IsPostBack)
{
//DropDownList configuration
}
Use EnableViewState:
<asp:DropDownList ID="ddlAddDepPlans" runat="server" AutoPostBack="true" EnableViewState="true" />
Hope it helps you.
I had the same issue. My problem was that the values of my ListItems were all the same :D
<asp:DropDownList ID="ddlFilterLogins" runat="server" Visible="true" AutoPostBack="true">
<asp:ListItem Value="0" Text="All"></asp:ListItem>
<asp:ListItem Value="0" Text="Some"></asp:ListItem>
<asp:ListItem Value="0" Text="Some more"></asp:ListItem>
</asp:DropDownList>
It should be like this:
<asp:DropDownList ID="ddlFilterLogins" runat="server" Visible="true" AutoPostBack="true">
<asp:ListItem Value="0" Text="All"></asp:ListItem>
<asp:ListItem Value="1" Text="Some"></asp:ListItem>
<asp:ListItem Value="2" Text="Some more"></asp:ListItem>
</asp:DropDownList>
Hope this helps. This might be hard to find sometimes :)
Please, when you initialize it in Page_Load() check if not is postback. If you don't do it, you will always set the default value, and this replaces the value setted in the event.
if(!IsPostBack)
{
//DropDownList configuration
}
You can use Init event instead of SelectIndexChanged.
It worked fine for me.
Hope you got my point.
It was also a wired problem for me. finally It was because of identical listitems in the dropdown as shown below. during development you may use same items just for testing. change them.
<asp:ListItem>Business</asp:ListItem>
<asp:ListItem>Business</asp:ListItem>
<asp:ListItem>Business</asp:ListItem>
<asp:ListItem>Business</asp:ListItem>