Controls in update panel don't get updated

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I have included two Dropdown-lists inside an UpdatePanel. First Dropdown-list contains a list of Departments. What I want to do is, when the user selects a department, the second Dropdown-list should be populated with the list of employees work in that particular department.

I have used an Master page. The Dropdown-lists and the Script Manager are in the content page (child page). This worked Perfectly before I added the Master Page. But now, the second Dropdown-list (Employee list) updates only once.

Eg. when I change the default value of the Departments Dropdown-list, the second Dropdown-list (Employee list) updates. But if I change the Department code again, the values in the Employee list don't get updated. I checked the values in the Employee list using a break point. There the values have been updated. But the values are not displayed on the .aspx web page. (AutoPostBack property of the departmentID Dropdown-list is set to True)

ASP.NET

<asp:UpdatePanel ID="UpdatePanel1" runat="server">
     <ContentTemplate>
       <asp:DropDownList ID="departmentID" runat="server" onselectedindexchanged="txtCompanyID_SelectedIndexChanged"> </asp:DropDownList>
       <asp:DropDownList ID="employeeID" runat="server"> </asp:DropDownList>
     </ContentTemplate> 
</asp:UpdatePanel>

Please help me with this issue.
Thanks in advance. Have a nice day!

Posted 16-Mar-12 20:16pm

yl2rox

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2 solutions

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Prabhakaran Soundarapandian · Answer 1 · 2012-03-16T21:18:00

Solution 1

Add the below code inside your update panel

C#

<Triggers>
<asp:AsyncPostBackTrigger ControlID="departmentID" EventName="SelectedIndexChanged" />
</Triggers>

Posted 16-Mar-12 21:18pm

Prabhakaran Soundarapandian

Comments

Prabhakaran Soundarapandian 17-Mar-12 3:26am

If again its not getting load means just add one more update panel and put the employee control in that panel and add the above code..If this answer is useful don't forget to mark as answer.

yl2rox 17-Mar-12 3:40am

Non of these doesn't make any difference. Thanks anyway. (BTW the dropdown lists are in a table)

Member 8311095 · Answer 2 · 2012-03-16T22:50:00

Solution 2

SQL

<asp:DropDownList ID="departmentID" AutoPostback="true" runat="server" onselectedindexchanged="txtCompanyID_SelectedIndexChanged"> </asp:DropDownList>

Posted 16-Mar-12 22:50pm

Member 8311095

Comments

yl2rox 17-Mar-12 7:01am

Autopostback property is already set to true. Any way Thanks both of you! I found a solution. There were some javascripts in my master page and after I remove those scripts it works perfectly

Controls in update panel don't get updated

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Controls in update panel don't get updated

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