control not working after using update panel

Prashant Gunde

I am using update panel for dropdownlist with providing triggering statement and also set autopostback property is "true" but still the DDL control not proper working on selectedindexedchanged.

my code is below-->

AutoPostBack="True"
onselectedindexchanged="ddlClient_SelectedIndexChanged">

EventName="SelectedIndexChanged" />

my .cs file-->

try
{

if (ddlClient.SelectedItem != null)
{

Boolean members = objClsClient.checkmember(ddlClient.SelectedValue);
if (members == true)
{
Image2.ImageUrl = "~/Images/green-flag.jpg";
Image2.ToolTip = "Indimnity Bond Signed";
}
else if (members == false)
{
Image2.ImageUrl = "~/Images/red-flag.jpg";
Image2.ToolTip = "Indimnity Bond Signed";
}

}
else
{

}

}catch....

Thanks in advance!!!!!

5 Replies

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Priyaranjan K S11y ago
Hi,

So your problem is the flag is always the same color its not changing ?

If that is the problem then your drop down list is repopulated every time the form loads. So what might happen is you select a different ddl value and the control flow will again go to form load and set the default ddl value again .

To over come this implement it this way and see:
private void Page_Load()
{
if (!IsPostBack)
{
//You can write here the code, which you want to execute in the first time when the page is loaded.In your case ddl population.
}
}

Thanks,
Priyan

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Prashant Gunde11y ago
Hi

On my form their is 1 DDL and one Flag.
I want if i select item in DDL then Flag Will be Change flag green to red according to selected item
without rendering the page,So i have use update panel but it won't be working...

Regards
Prashant
Priyaranjan K S11y ago
Hi,

What do you mean by "DDL control not proper working on selectedindexedchanged." Can you please explain the issue in detail

Thanks,
Priyan
Prashant Gunde11y ago
Thanks Priyan .

I have set the UpdateMode "Conditional" But still the control are not working!!!!
Priyaranjan K S11y ago
Hi Prashant,

Try setting the Update Panel's Update mode to 'Conditional' .

<asp:UpdatePanel ID="up" runat="server" UpdateMode="Conditional">

Thanks,
Priyan

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