C# 非常有用。当做 $.post("yourdatabasehandler.aspx", { name: "John", lastname: "Smith" }, function(data) { alert("Response from page:

非常有用。当做

$.post("yourdatabasehandler.aspx", { name: "John", lastname: "Smith" }, function(data) {
    alert("Response from page: " + data);
  });

string name = Request.Params["name"]
// Do your database , validation and whatever logic here
Response.Write("Cool dude");

window.open("popup_page.aspx?id=" + id + "&name=" + name)

string sID = Request.QueryString("id");
string sName = Request.QueryString("name");

function ShowPopup(strMessage) 
{   
   var returnValue= window.showModalDialog("popup_page.aspx");

}

<asp:Button ID="btnReturnValue" runat="server" Text="Proceed" OnClientClick="window.returnValue='some message';window.close();" />

<script language="javascript">

function GetRowValue(val)
{
    window.opener.document.getElementById("ctl00_ContentPlaceHolder1_TextBox2").value = val;
   // make sure you change the TextBoxId as respective to your creation 
    window.close();
}

</script>

<asp:GridView ID="GridView1" runat="server" DataSourceID="SqlDataSource1">
<Columns>
<!-- Reserve the code below, as after you configure data source you -->
<!-- will alter this code drastically therefore-->
<!--you have to make sure to paste this code --> 
<!-- again inside this Gridview element once you configure your data source -->
    <asp:TemplateField>
        <AlternatingItemTemplate>
            <asp:Button ID="btnSelect" runat="server" Text="Select" />
        </AlternatingItemTemplate>
        <ItemTemplate>
            <asp:Button ID="btnSelect" runat="server" Text="Select" />
        </ItemTemplate>
    </asp:TemplateField>
<!-- This part must be reserved -->
</Columns>