Show Hide panel in FormView based image URL on DataBound using C# in ASP.Net

micah

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User: micah
Posted: on May 08, 2017 05:19 AM
Forum: ASP.Net Web Forms
Answer: 1
Views: 5557
Sample Code: Download

i have two image controls on page image A and Image B, If image A is avaible in table hide image B on page and display image A, or if image B is available in table hide image A and display image B

<asp:FormView ID="Post" runat="server" CssClass=" " OnItemDataBound="Post_ItemDataBound">
    <ItemTemplate>
        <asp:Label ID="lblimagename" runat="server" Text='<%# Eval("fName") %>' Visible="false" />
        <asp:Panel ID="pnlhidusers3" runat="server">
            <a class="pull-left" href='<%#getUserHREF05(Container.DataItem)%>' style="margin-bottom: 2px;">
                <asp:Image ID="imguserImage" runat="server" ImageUrl='<%#getSRCfusersh(Container.DataItem)%>'
                    CssClass="media-object img-rounded animated fadeInDown" Width="45px" Height="45px"
                    data-toggle="tooltip" title="Profile Photo" alt="" />
            </a>
        </asp:Panel>
        <asp:Panel ID="pnlresimagesmall" runat="server">
            <asp:Image ID="friIMAGE" runat="server" src='<%#getSRCIMAGESH(Container.DataItem)%>  '
                class="" Style="width: 45px; height: 45px" alt="" data-aria-label-part="" ImageUrl='<%# ("../PROFILEPHOTOS/") %>' />
        </asp:Panel>
    </ItemTemplate>
</asp:FormView>

    protected void Post_ItemDataBound(object sender, DataListItemEventArgs e)
    {
        if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
        {
            if (!string.IsNullOrEmpty((e.Item.FindControl("imguserImage") as Image).ImageUrl))
            {
                (e.Item.FindControl("pnlhidusers3") as Panel).Visible = true;
            }
            else
            {
                (e.Item.FindControl("pnlhidusershare3") as Panel).Visible = false;
            }
        }
    }

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dharmend...

0 1

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ANSWER
User: dharmendr
Replied: on May 08, 2017 05:31 AM
Modified: on May 08, 2017 06:14 AM
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Hi micah,

Now i can say you are not understanding the code you are just copy pasting code. Because we have already provided you same type of sample twice. Below are the links.

You are using FormView and in the code you are using DataList Event i.e. DataListItemEventArgs

There is no event OnItemDataBound for FormView that takes DataListItemEventArgs as one parameter. In FormView there is OnDataBound event and it takes parameter as EventArgs.

So your code should be

protected void Post_DataBound(object sender, EventArgs e)
{
    Image imageA = Post.FindControl("imguserImage") as Image;
    Panel pnlA = Post.FindControl("pnlhidusers3") as Panel;
    Panel pnlB = Post.FindControl("pnlresimagesmall") as Panel;
    if (!string.IsNullOrEmpty(imageA.ImageUrl))
    {
        pnlA.Visible = true;
        pnlB.Visible = false;
    }
    else
    {
        pnlA.Visible = false;
        pnlB.Visible = true;
    }
}

And the FormView should be

<asp:FormView ID="Post" runat="server" CssClass=" " OnDataBound="Post_DataBound">

So change the above and use find control with proper id to find the controls and change the condition if it is wrong.

I agree, here is the link: https://www.e-iceblue.com/Introduce/spire-office-for-net-free.html

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