Visual Webpart for Creating Sharepoint Sites

UI:
<div>
    <asp:Label ID="lblSiteName" Text="Site Name: " runat="server" Width="100" />
    <asp:TextBox ID="txtSiteName" runat="server" />
    <asp:Label ID="lblSiteDescription" Text="Site Description: " runat="server" />
    <asp:TextBox ID="txtSiteDescription" runat="server" />
    <asp:Label ID="lblIntendedURL" Text="Intended URL: " runat="server" />
    <asp:TextBox ID="txtIntendedURL" runat="server" />
    <asp:Label ID="lblSiteTemplate" Text="Site Template: " runat="server" />
    <asp:DropDownList ID="ddlSiteTemplate" runat="server"
        onselectedindexchanged="ddlSiteTemplate_SelectedIndexChanged">
    </asp:DropDownList>
    <asp:CheckBox ID="chkUniquePermissions" Text="Unique Permissions " runat="server" />
    <asp:Button ID="btnSubmit" runat="server" onclick="btnSubmit_Click"
        Text="Submit" />
</div>

Code:


using System;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web;
using Microsoft.SharePoint;
namespace Jan10thVWP1.VisualWebPart1
{
    public partial class VisualWebPart1UserControl : UserControl
    {
        SPWebTemplateCollection wt;
        protected void Page_Load(object sender, EventArgs e)
        {
        }
        protected void btnSubmit_Click(object sender, EventArgs e)
        {
            if (txtSiteName.Text == string.Empty && txtIntendedURL.Text == string.Empty)
                return;
            using (SPSite site = new SPSite(@"http://sp2010"))
            {
                using (SPWeb web = site.RootWeb)
                {
                    try
                    {
                        SPSecurity.RunWithElevatedPrivileges(() => web.Webs.Add(
                            txtIntendedURL.Text,
                            txtSiteName.Text,
                            txtSiteDescription.Text,
                            1033,
                            ddlSiteTemplate.SelectedValue,
                            chkUniquePermissions.Checked,
                            false));
                        ScriptManager.RegisterClientScriptBlock(this, this.GetType(), Guid.NewGuid().ToString(), "alert('Success');", true);
                    }
                    catch (Exception ex)
                    {
                        string error = ex.Message;
                        ScriptManager.RegisterClientScriptBlock(this, this.GetType(), Guid.NewGuid().ToString(), "alert('" + error + "');", true);
                    }
                    finally
                    {
                        txtSiteName.Text = string.Empty;
                        txtSiteDescription.Text = string.Empty;
                        txtIntendedURL.Text = string.Empty;
                    }
                }
            }
        }
        protected override void OnLoad(EventArgs e)
        {
            EnsureChildControls();
            if (!IsPostBack)
            {
                using (SPSite site = new SPSite(@"http://sp2010"))
                {
                    using (SPWeb web = site.RootWeb)
                    {
                        try
                        {
                            wt = web.GetAvailableWebTemplates(1033);
                            foreach (SPWebTemplate template in wt)
                            {
                                ddlSiteTemplate.Items.Add(new ListItem(template.Title, template.Name));
                            }
                            ddlSiteTemplate.DataBind();
                        }
                        catch (Exception ex)
                        {
                            string error = ex.Message;
                            ScriptManager.RegisterClientScriptBlock(this, this.GetType(), Guid.NewGuid().ToString(), "alert('" + error + "');", true);
                        }
                    }
                }
            }
        }
        protected void ddlSiteTemplate_SelectedIndexChanged(object sender, EventArgs e)
        {
        }
    }
}