Solved

Controls Render Twice

Posted on 2008-10-21
7
735 Views
Last Modified: 2012-05-05
Hi

I am using an Update Panel but when I click the button within the  panel. It renders the controls (1 textbox and a dropd down) twice. Code is below.

Any ideas on what I am doing wrong....

Thansk
<asp:UpdatePanel ID="UpdatePanel2" runat="server">

			

			<ContentTemplate>

					<asp:Button ID="cmdUseThis" runat="server" Text="Use This" onclick="cmdUseThis_Click" />
 

				</td>

			</tr>
 

			<tr>

			

				<td class="rowLabel">

					&nbsp;State:</td>

				<td>

					&nbsp;

					<asp:TextBox ID="txtState" runat="server"></asp:TextBox>

				</td>

			</tr>

			<tr>

				<td class="rowLabel" valign="top">

					Country:</td>

				<td>

					&nbsp;

					<asp:DropDownList ID="ddlCountry" runat="server" AppendDataBoundItems="true">

					<asp:ListItem></asp:ListItem>

					</asp:DropDownList>	

					

					<asp:UpdateProgress ID="UpdateProgress1" runat="server">

				<ProgressTemplate>

				<img alt="working..." src="../images/spinner.gif" />

				</ProgressTemplate>

				</asp:UpdateProgress>

				</td></tr></table>

			</ContentTemplate>
 

			</asp:UpdatePanel>

Open in new window

0
Comment
Question by:patelajk
  • 4
  • 3
7 Comments
 
LVL 10

Expert Comment

by:jinn_hnnl
ID: 22766636
What do you mean by render it tiwce, you see 4 thing after the click, or you see the dropdown with duplicated data? Can you show us how your button click is defined  in code behind?


0
 

Author Comment

by:patelajk
ID: 22766676
button code is and yes i see 4 things 2 with the data which generate after the onclick the the same ones below but with no data

      Protected Sub cmdUseThis_Click(ByVal sender As Object, ByVal e As System.EventArgs)
            If Not ddlCountry Is Nothing Then
                  ddlCountry.Items.Clear()
                  PopulateDropDowns()
            End If
            Dim objCountryID As Object = DataAccess.getScalarResult("SELECT City_Country_ID FROM tblCity WHERE City_ID = " & listLocInfo.SelectedValue)
            Dim objStateID As Object = DataAccess.getScalarResult("SELECT City_State_ID FROM tblCity WHERE City_ID = " & listLocInfo.SelectedValue)
      
            If Not IsDBNull(objStateID) Then
                  txtState.Text = DataAccess.getScalarResult("SELECT State_Name FROM tblState WHERE State_ID = " & objStateID)
            End If
            
            ddlCountry.Items.FindByValue(objCountryID).Selected = True
            ddlCountry.Visible = False
            txtState.Visible = False
            
      End Sub

0
 
LVL 10

Expert Comment

by:jinn_hnnl
ID: 22766805
Is this update panel part within an WebUserControl, if so, you might wanna check if you have added the entire thing twice (on PageLoad, PreReder ... once and another place two).

If not,
 PopulateDropDowns() ??? what does this function do??? <- the way I look at the name, I guess it add another dropdown to the container control.

Right click on the output browser and see if you see 4 different stuffs there, and try to run it in IE and Firefox to see if both browser acts the same way (I guess they do).

Hope this helps

JINN


0
Find Ransomware Secrets With All-Source Analysis

Ransomware has become a major concern for organizations; its prevalence has grown due to past successes achieved by threat actors. While each ransomware variant is different, we’ve seen some common tactics and trends used among the authors of the malware.

 

Author Comment

by:patelajk
ID: 22767362
PopulateDropDowns gets populate the drop down with values from a database - in this case the countries

i am not adding it twice i am pretty sure of that and IE does the same thing
0
 
LVL 10

Accepted Solution

by:
jinn_hnnl earned 125 total points
ID: 22767497
Ok here might be the problem, all what I can guess is the UpdatePanel screw up your page as you interpret them in between your table html tag. Which not wise able.

You might try to redecorate them abit by put the entire table content inside that updatePanel instead of open somewhere, start with a <td> and end table before closing the updatePanel

Can you give another try?

JINN


<asp:UpdatePanel ID="UpdatePanel2" runat="server">                        

         <ContentTemplate>

		<table>

			<tr>

				<td colspan="2">

                                        <asp:Button ID="cmdUseThis" runat="server" Text="Use This" onclick="cmdUseThis_Click" />

 

                                </td>

                        </tr>

 

                        <tr>

                        

                                <td class="rowLabel">

                                         State:

				 </td>

                                <td>                                         

                                        <asp:TextBox ID="txtState" runat="server"></asp:TextBox>

                                </td>

                        </tr>

                        <tr>

                                <td class="rowLabel" valign="top">

                                        Country:</td>

                                <td>

                                         

                                        <asp:DropDownList ID="ddlCountry" runat="server" AppendDataBoundItems="true">

                                        <asp:ListItem></asp:ListItem>

                                        </asp:DropDownList>     

                                        

                                        <asp:UpdateProgress ID="UpdateProgress1" runat="server">

                                <ProgressTemplate>

                                <img alt="working..." src="../images/spinner.gif" />

                                </ProgressTemplate>

                                </asp:UpdateProgress>

                                </td>

			</tr>

		</table>

	</ContentTemplate>
 

</asp:UpdatePanel>

Open in new window

0
 

Author Closing Comment

by:patelajk
ID: 31508232
Brilliant.... thanks a million
0
 
LVL 10

Expert Comment

by:jinn_hnnl
ID: 22767628
Glad to help ^^

JINN
0

Featured Post

IT, Stop Being Called Into Every Meeting

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

Join & Write a Comment

In .NET 2.0, Microsoft introduced the Web Site.  This was the default way to create a web Project in Visual Studio 2005.  In Visual Studio 2008, the Web Application has been restored as the default web Project in Visual Studio/.NET 3.x The Web Si…
It was really hard time for me to get the understanding of Delegates in C#. I went through many websites and articles but I found them very clumsy. After going through those sites, I noted down the points in a easy way so here I am sharing that unde…
In this seventh video of the Xpdf series, we discuss and demonstrate the PDFfonts utility, which lists all the fonts used in a PDF file. It does this via a command line interface, making it suitable for use in programs, scripts, batch files — any pl…
This video explains how to create simple products associated to Magento configurable product and offers fast way of their generation with Store Manager for Magento tool.

747 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

12 Experts available now in Live!

Get 1:1 Help Now