Update Panel On Master Page[Answered] RSS

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Last post Apr 04, 2014 10:27 PM by dieseldave

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dieseldave

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Update Panel On Master Page

Apr 02, 2014 07:20 PM|dieseldave|LINK

I have an Image control a Master Page that the user can change from a content page. I would like to update the picture using an update panel, but I dont see how I can trigger it from the content page.

The master page image

<asp:UpdatePanel ID="UpdatePanelParent" runat="server" ChildrenAsTriggers="false" UpdateMode="Conditional"> 
                  <ContentTemplate>
              <asp:Image ID="iprofile" runat="server" BorderStyle="Solid" BorderColor="Gold" BorderWidth="1px" style="margin:20px;" />
                  </ContentTemplate>
                  </asp:UpdatePanel>

protected void btnclosepic_Click(object sender, EventArgs e)
    {
        UpdatePanel panel = (UpdatePanel)Master.FindControl("UpdatePanelParent");
        panel.Update();

    }

This is my attempt at triggering the update Panel - it doesnt work...

DieselDave

dotnetzoom

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Re: Update Panel On Master Page

Apr 02, 2014 07:27 PM|dotnetzoom|LINK

dieseldave
I would like to update the picture using an update panel, but I dont see how I can trigger it from the content page.

One simple solution would be removing update mode

<asp:UpdatePanel ID="UpdatePanelParent" runat="server">
    <ContentTemplate>
        <asp:Image ID="iprofile" runat="server" BorderStyle="Solid" BorderColor="Gold" BorderWidth="1px" Style="margin: 20px;" />
    </ContentTemplate>
</asp:UpdatePanel>

content page:

(Master.FindControl("iprofile") as Image).ImageUrl = "Image url from content page";

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dieseldave
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574 Posts

Re: Update Panel On Master Page

Apr 02, 2014 09:40 PM|dieseldave|LINK

that returns an error -'Cannot convert type 'System.Web.UI.Control' to 'Image''

DieselDave
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dotnetzoom
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Re: Update Panel On Master Page

Apr 02, 2014 09:53 PM|dotnetzoom|LINK
It seems like you are using System.Drawing in the page class. Make sure that proper type is used
```
 (Master.FindControl("iprofile") as System.Web.UI.WebControls.Image).ImageUrl = "Image url from content page";
```
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dieseldave
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574 Posts

Re: Update Panel On Master Page

Apr 04, 2014 10:27 PM|dieseldave|LINK

OK I get no errrors, but the image on the master page is not updated. I have to leave the page and re-enter , so when it does postback it works, but it is not getting an asynch postback.

(Master.FindControl("iprofile") as System.Web.UI.WebControls.Image).ImageUrl = filepath;

DieselDave

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