ASP.Net: How to open a second window and write something in the mainwindow?

I want to open a window on a button click (favorite is ImageButton) and开发者_JAVA技巧 do some searches there. The search should be in a grid view and give the information back directly into a textbox.

How is this possible? (best would be without javascript directly)

Client-side Option:

window.opener.document.getElementById("id").value = "whatever";

Server-side Option:

Postback your window that is open, save the data somewhere so that is retrievable by the other page, emit javascript: window.opener.submit();self.close(); on it's postback to cause your other page to then postback and the open window to close. Have your code-behind retrieve the data needed and change your TextBox.

I'll put it using javascript for the image button add this at the server side

imgBtn.Attributes.Add("onclick","open_window()")

Then Add this Javascript function in the container page

   function open_window()
     {
    var item = document.getElementById("txtShow");
     var dataitem = window.open("YourPage.aspx", "dataitem",
 "toolbar=no,menubar=no,scrollbars=yes"); 
     dataitem.item = item;

     }

in the window add the select function and create a custom link in the grid view

   function select_item(name) {
        item.value = name;
        top.close();
    }

GridView:

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
            DataKeyNames="rowID" DataSourceID="SqlDataSource1">
            <Columns>
                <asp:BoundField DataField="Field" HeaderText="Test" />
            <asp:TemplateField>
                <ItemTemplate>
                    <a href="javascript:void(0)" onclick="select_item('<%#Eval("SelectText") %>')">Select</a>
                </ItemTemplate>
            </asp:TemplateField>
            </Columns>
        </asp:GridView>