<asp:Button ID="btnChoseUnit" OnClientClick="javascript:OpenPopup();" runat="server"

                        Text="单位选择" />

<input type="hidden" id="txtUnitName" runat="server" />

                    <input type="hidden" id="txtUnitId" runat="server" />

<script type="text/javascript">

        function OpenPopup() {



            window.showModalDialog("TreeViewInfo.aspx", "List", "scrollbars=no,resizable=no,width=400,height=263");

        }

        function setValue(UnitName, UnitId) {

            document.getElementById('txtUnitName').value = UnitName;

            document.getElementById('txtUnitId').value = UnitId;

        }

    </script>

<input type="hidden" runat="server" id="txtUnitName" />

    <input type="hidden" runat="server" id="txtUnitId" />

    <div>

        <asp:TreeView ID="TrView" Font-Bold="true" Font-Size="15px" runat="server" ImageSet="Contacts"

            ShowCheckBoxes="All" OnTreeNodeCheckChanged="TrView_TreeNodeCheckChanged">

            <ParentNodeStyle Font-Bold="False" />

            <HoverNodeStyle Font-Underline="True" ForeColor="#5555DD" />

            <SelectedNodeStyle Font-Underline="True" HorizontalPadding="0px" VerticalPadding="0px"

                ForeColor="#5555DD" />

            <NodeStyle Font-Names="Verdana" Font-Size="8pt" ForeColor="Black" HorizontalPadding="5px"

                NodeSpacing="0px" VerticalPadding="0px" />

        </asp:TreeView>

    </div>

    <div>

        <asp:Button ID="btnUnitAdd" runat="server" Text="确认选择" OnClick="btnUnitAdd_Click" />

    </div>

    </form>

StringBuilder strUname = new StringBuilder();

            StringBuilder strUnitId = new StringBuilder();

            //组织的名字

            string UnitName = string.Empty;

            //组织Id

            string UnitId = string.Empty;

            foreach (TreeNode item in TrView.CheckedNodes)

            {

                if (item.Checked)

                {

                    strUname.AppendLine(item.Text + ";");

                    strUnitId.AppendLine(item.Value + ";");



                }



            }

            //      function valueClose() {

            //    var UnitName = docment.getElementById('txtUnitName').value;

            //    var UnitId = docment.getElementById('txtUnitId').value;

            //    opener.setValue(UnitName, UnitId)

            //    window.close();

            //}



            StringBuilder s = new StringBuilder();

            s.Append("<script language=javascript>" + "\n");

            s.Append("var UnitName = docment.getElementById('txtUnitName').value;");

            s.Append("var UnitId = docment.getElementById('txtUnitId').value;");

            s.Append("opener.setValue('" + strUname + "', '" + strUnitId + "')");

            s.Append("window.close();" + "\n");

            s.Append("</script>");

            Type cstype = this.GetType();

            ClientScriptManager cs = Page.ClientScript;

            string csname = "ltype";

            if (!cs.IsStartupScriptRegistered(cstype, csname))

                cs.RegisterStartupScript(cstype, csname, s.ToString());