java script pop up window

Refer:

1. how to open new window on click link button in gridview

And refer this for how to transfer query string

1. How to bind and pass query string in HyperLink in GridView in ASP.Net

I tried your code but it is not working for me 

please check my code and let me know where i am wrong 

thank u 

Creating a sample I will get back to you soon.

can you please tell me whats wrong is here 

<asp:LinkButton runat ="server" ID="LinkButton1" Text='<%#Eval("StudentID") %>' OnClientClick ="javascript:void(window.open('/StudentDemographicsPopUp.aspx?studentid=<%# DataBinder.Eval(Container.DataItem, "StudentID")%>','_blank','height=600','width=600') );" > </asp:LinkButton>

or 

<asp:LinkButton runat ="server" ID="LinkStudentID" Text='<%#Eval("StudentID") %>' OnClientClick ="javascript:popUp('/StudentDemographicsPopUp.aspx?studentid=<%#DataBinder.Eval(Container.DataItem, "StudentID")%>');" > </asp:LinkButton>

Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately. Parser Error Message: The server tag is not well formed. Source Error:

Line 68:                    <ItemTemplate  > 
Line 69:                     
Line 70:   <asp:LinkButton runat ="server" ID="LinkButton1" Text='<%#Eval("StudentID") %>'   OnClientClick ="javascript:void(window.open('/StudentDemographicsPopUp.aspx?studentid=<%# DataBinder.Eval(Container.DataItem, "StudentID")%>','_blank','height=600','width=600') );"  >   </asp:LinkButton>
Line 71: 
Line 72:                     </ItemTemplate>        

This way

HTML

<asp:GridView ID="GridView1" HeaderStyle-BackColor="#3AC0F2" HeaderStyle-ForeColor="White"
    runat="server" AutoGenerateColumns="false">
    <Columns>
        <asp:BoundField DataField="Id" HeaderText="Id" ItemStyle-Width="30" />
        <asp:BoundField DataField="Name" HeaderText="Name" ItemStyle-Width="150" />
        <asp:BoundField DataField="Country" HeaderText="Country" ItemStyle-Width="150" />
        <asp:TemplateField>
            <ItemTemplate>
                <asp:LinkButton ID="LinkButton1" Text="Redirect" OnClientClick='<%# DataBinder.Eval(Container.DataItem, "Id","popUp2({0})")%>'
                    runat="server" />
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

Namescpace

using System.Data;

 C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        DataTable dt = new DataTable();
        dt.Columns.AddRange(new DataColumn[3] { new DataColumn("Id", typeof(int)),
                        new DataColumn("Name", typeof(string)),
                        new DataColumn("Country",typeof(string)) });
        dt.Rows.Add(1, "John Hammond", "United States");
        dt.Rows.Add(2, "Mudassar Khan", "India");
        dt.Rows.Add(3, "Suzanne Mathews", "France");
        dt.Rows.Add(4, "Robert Schidner", "Russia");
        GridView1.DataSource = dt;
        GridView1.DataBind();
    }
}

 Javascript

<script type="text/javascript">
    function popUp2(lnk) {
        window.open("Default2.aspx?Id=" + lnk);
    }
</script>