如何将listview的值从aspx页传递到另一个？

Question

I am working on class project where I am creating a listview in one .aspx page. I can display database through this list view but I cannot transfer the value of selected item from this .aspx page to another.

My designing code is like below:

<asp:ListView ID="lvPresent" runat="server" DataSourceID="SqlDataSource1" OnItemDataBound="lvPresent_ItemDataBound" >
        <LayoutTemplate>
            <table>
                <tr>
                    <td></td>
                </tr>
            </table>
            <asp:PlaceHolder ID="itemPlaceHolder" runat="server"></asp:PlaceHolder>
        </LayoutTemplate>
        <ItemTemplate>
            <td>
                <asp:HyperLink ID="HyperLink1" runat="server">

                    <asp:Image ID="ImageButton1" runat="server" ImageUrl='<%#Eval("url")%>' Height="200px" Width="250px" />

                </asp:HyperLink>
            </td>
        </ItemTemplate>

    </asp:ListView>

What should I do to get this work done ?

Answer 1

To send URL to another page you can use QueryString . Modify your HyperLink and add NavigateUrl

NavigateUrl='<%#"yourNextPageName.aspx?imgURL="+ Eval("url")%>'

just replace you code:-

<asp:HyperLink ID="HyperLink1" runat="server">

  <asp:Image ID="ImageButton1" runat="server" ImageUrl='<%#Eval("url")%>' Height="200px" Width="250px" />

</asp:HyperLink>

with

<asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl='<%#"yourNextPageName.aspx?imgURL="+ Eval("url")%>'>

  <asp:Image ID="ImageButton1" runat="server" ImageUrl='<%#Eval("url")%>' Height="200px" Width="250px" />

</asp:HyperLink>

On that page, you can access image url like this:-

string imgurl = Request.QueryString["imgURL"];

Put an image control in that page assign this image on page load, if your image control id is Image1 then you can assign on page load of that page like this:-

Image1.ImageUrl = imgurl

Answer 2

Look into server.transfer or response.redirect to pass data between pages..

A link on SO on the difference between the 2 and what they do:

Server.Transfer Vs. Response.Redirect

Answer 3

1. You can redirect to the other page and send the value in a query string

2. You can send the value in a session object