ASP.NET

<frameset cols="25%,*">
    <frame name="TreeView" src="TreeViewMenu.aspx" />
    <frameset rows="40%,*">
        <frame name="Parameters" src="UploadPage.aspx" />
        <frame name="DataDisplay" src="DataDisplay.aspx" />
    </frameset>
</frameset>

protected void TreeView1_SelectedNodeChanged(object sender, EventArgs e)
{
    string strSelected = ((TreeView)sender).SelectedNode.Value.ToString();
    
    switch (strSelected)
    {
        case "Node1":
            // Response.Write(strSelected);
            // What code should I put here...
            break;
    }
}

<asp:CheckBox ID="chkShowAllDistributors" runat="server" checked="false" Text="Show All Distributors"  OnCheckedChanged="chkShowAllDistributors_CheckedChanged"/><br /><br />
  <asp:DropDownList ID="ddlDistributor" runat="server" OnSelectedIndexChanged="ddlDistributor_SelectedIndexChanged"></asp:DropDownList>

protected void chkShowAllDistributors_CheckedChanged(object sender, EventArgs e)
 {
     this.BindDistributor();
 }
 protected void ddlDistributor_SelectedIndexChanged(object sender, EventArgs e)
 {
     this.BindDistributor();
 }