ASP.NET insert插入语句问题
各位大虾。
我写了一段新用户注册代码，代码如下，不报错也不能插入数据库，希望给我大虾帮帮这只菜鸟

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
public partial class zhucexinyonghu : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{

}
protected void Button1_Click(object sender, EventArgs e)
{
string username =this.TextBox1.Text;
string password = this.TextBox2.Text;
string name = this.TextBox4.Text;
string question = this.TextBox5.Text;
string answer = this.TextBox6.Text;
string phonenumber = this.TextBox7.Text;

SqlConnection cn = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString11"].ConnectionString);
cn.Open();
string sqlsel = "select * from Users where UserName='" + TextBox1.Text + "'";
SqlCommand cmd = new SqlCommand(sqlsel ,cn);
if (TextBox1.Text==""||TextBox2.Text==""||TextBox4.Text==""||TextBox5.Text==""||TextBox6.Text=="")
{
RegisterStartupScript("", "<script>alert('打*的文本框为必填')</script>");
}
else if (Convert.ToInt32(cmd.ExecuteScalar()) > 0)
{
RegisterStartupScript("", "<script>alert('对不起该用户名已经被注册过')</script>");
}
else if(TextBox3.Text!=TextBox2.Text)
{
RegisterStartupScript("", "<script>alert('你两次输入的密码不相同')</script>");
}
else
{
SqlConnection cn1 = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString11"].ConnectionString);
cn1.Open();
string sqlsel1 = "insert into [Users]([UserName],[Password],[Name],[Question],[Answer],[PhoneNumber]) values('" + username+ "','" +password +"','" + name + "','" + question + "','" + answer + "''" + phonenumber + "')";

SqlCommand cmd1 = new SqlCommand(sqlsel1, cn1);
try
{
RegisterStartupScript("", "<script>alert('注册成功')</script>");
}
catch
{
RegisterStartupScript("", "<script>alert('注册失败')</script>");
}


}

}

}


[解决办法]
string sqlsel1 = "insert into [Users]([UserName],[Password],[Name],[Question],[Answer],[PhoneNumber]) values('" + username+ "','" +password +"','" + name + "','" + question + "','" + answer + "','" + phonenumber + "')";
[解决办法]
string sqlsel = "select count(*) from Users where UserName='" + TextBox1.Text + "'";

还有就是1楼所说，另外

try
{
cmd1.ExecuteNonQuery();
RegisterStartupScript("", "<script>alert('注册成功')</script>");

}。

最后关闭数据连接。
[解决办法]
SqlCommand 根本没有执行语句操作 ExecuteNonQuery
[解决办法]
RegisterStartupScript("", "<script>alert('打*的文本框为必填')</script>");
确定这里就能执行吗？断点调试一下吧。