dropdownlist selected index changed does not file

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I have a dropdownlist

ASP.NET

<asp:DropDownList runat="server" ID="DDLState" CssClass="txtp"
        onselectedindexchanged="DDLState_SelectedIndexChanged" 
        AutoPostBack="True" AppendDataBoundItems="True"
       >
      
        <asp:ListItem>Select State</asp:ListItem>
      
    </asp:DropDownList>

I am filling it on pageload.
I have a button also

ASP.NET

<asp:Button runat="server" ID="btnsubmit" Text="Submit" 
        BackColor="Silver"  onclick="btnsubmit_Click"  />

C#

protected void btnsubmit_Click(object sender, EventArgs e)
        {
 DDLState.SelectedIndex=2;
}

DDLState_SelectedIndexChangeddoes not fire.

Posted 9-Dec-13 19:16pm

Member 7909353

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Comments

Karthik_Mahalingam 10-Dec-13 1:26am

you want to fire on button click or its not firing on selection change in ddl ???

Member 7909353 10-Dec-13 1:33am

According to index, text has been changed but DDLState_SelectedIndexChangeddoes not fire

if I change text, index is also changed but DDLState_SelectedIndexChangeddoes not fire

Member 7909353 10-Dec-13 1:31am

According to index text has been changed but DDLState_SelectedIndexChangeddoes not fire

Member 7909353 10-Dec-13 1:33am

if I change text, index is also changed but DDLState_SelectedIndexChangeddoes not fire

Harshil_Raval 10-Dec-13 1:54am

Check in your page load method. Have you put your dropdown fill method in !ispostback().

Member 7909353 10-Dec-13 1:59am

yes

if (!IsPostBack)
{

DDLState.DataSource = StateList.Values;
DDLState.DataBind();
}

Harshil_Raval 10-Dec-13 2:08am

wait, you mean on button click you have changed selected index of dropdown, so it should call selectedindexchanged event of dropdown!!!!

Member 7909353 10-Dec-13 2:09am

yes

Harshil_Raval 10-Dec-13 2:19am

that is not possible. selectedindex event call when you change index in dropdown by selecting it, not by changing it in coding.

Member 7909353 10-Dec-13 2:21am

Are you sure?

Harshil_Raval 10-Dec-13 2:30am

yes

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 10-Dec-13 2:31am

(Clap). :)

Harshil_Raval 10-Dec-13 2:32am

thanks. :)

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 10-Dec-13 2:35am

Welcome. :)

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 11-Dec-13 8:31am

You should accept the answer so that it will be closed.

Thanks,
Tadit

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Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) · Accepted Answer · 2013-12-09T20:30:00

Solution 1

Quote:
Are you sure?

Yes, Harshil_Raval is correct.

Refer- ListControl.SelectedIndexChanged Event[^].

Quote:
The SelectedIndexChanged event is raised when the selection from the list control changes between posts to the server.

Posted 9-Dec-13 20:30pm

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

Updated 9-Dec-13 20:35pm

v2