为什么我这样子存储到数据库中的图片名只有images/ 是哪里错了呢？name是全局变量，但是好像name没有值（也就是颜色字体处） 但是在上传时 已经有图片路径了，大家帮我看看啊!谢谢拉！！！！！
[em2]


using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
using System.IO;
using System.Text;


public partial class register : System.Web.UI.Page
{
    public string name;
    protected void Page_Load(object sender, EventArgs e)
    {
        
    }
    protected void Button5_Click(object sender, EventArgs e)
    {
        if (FileUpload1.PostedFile.FileName != "")
        {
            Image1.Visible = false;
            string fullname = this.FileUpload1.FileName;

            FileInfo f = new FileInfo(fullname);
            name = f.Name;
            string type = f.Extension;
            if (".gif" == type || ".jpg" == type || ".GIF" == type || ".JPG" == type)
            {
                string savapath = Server.MapPath("images\\" + name);
                this.FileUpload1.PostedFile.SaveAs(savapath);
                this.Image1.Visible = true;
                this.Image1.ImageUrl = savapath;
            }
            else
            {
                Response.Write("<script>alert('请选择GIF和JPG格式图片')</script>");
            }

        }
    }

    protected void Button1_Click(object sender, EventArgs e)
    {
       
        SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["connectionsqlserver"].ConnectionString);
        con.Open();
        string sql = "select username from register where username=@username";
        SqlCommand cmd = new SqlCommand(sql,con);
        cmd.Parameters.Add("@username",SqlDbType.NChar);
        cmd.Parameters["@username"].Value = this.TextBox1.Text.ToString();
        SqlDataReader dr = cmd.ExecuteReader();
        if (dr.Read())
        {
            Response.Write("<script>alert('用户名存在！')</script>");
            return;
        }
        dr.Close();
        string sqltext = "insert into register(username,sex,age,password,repassword,email,question,answer,telephone,photo) values(@username,@sex,@age,@password,@repassword,@email,@question,@answer,@telephone,@photo)";
        SqlCommand scmd = new SqlCommand(sqltext,con);
        scmd.Parameters.Add("@username",SqlDbType.NChar,12);
        scmd.Parameters["@username"].Value = this.TextBox1.Text.ToString();
        scmd.Parameters.Add("@sex",SqlDbType.NChar,2);
        scmd.Parameters["@sex"].Value = this.RadioButtonList1.SelectedValue.ToString();
        scmd.Parameters.Add("@age",SqlDbType.Int);
        scmd.Parameters["@age"].Value = int.Parse(this.TextBox4.Text);
        scmd.Parameters.Add("@password",SqlDbType.NChar,12);
        scmd.Parameters["@password"].Value = this.TextBox2.Text.ToString();
        scmd.Parameters.Add("@repassword", SqlDbType.NChar, 12);
        scmd.Parameters["@repassword"].Value = this.TextBox3.Text.ToString();
        scmd.Parameters.Add("@email",SqlDbType.NChar,20);
        scmd.Parameters["@email"].Value = this.TextBox5.Text.ToString();
        scmd.Parameters.Add("@question",SqlDbType.NChar,1000);
        scmd.Parameters["@question"].Value = this.TextBox7.Text.ToString();
        scmd.Parameters.Add("@answer",SqlDbType.NChar,1000);
        scmd.Parameters["@answer"].Value = this.TextBox8.Text.ToString();
        scmd.Parameters.Add("@telephone",SqlDbType.NChar,11);
        scmd.Parameters["@telephone"].Value = this.TextBox6.Text.ToString();
        scmd.Parameters.Add("@photo",SqlDbType.VarChar,10);
       [color=008000] scmd.Parameters["@photo"].Value ="images/"+name;[/color]       
 try
        {

            scmd.ExecuteNonQuery();

            Response.Write("<script>alert('注册成功！')</script>");
          
        }
        catch (Exception error)
        {
            throw new System.Exception(error.Message);
        }
       
        
       }

    protected void Button2_Click(object sender, EventArgs e)
    {
        Response.Redirect("Default.aspx");
    }
    protected void Button3_Click(object sender, EventArgs e)
    {
        Response.Redirect("Default.aspx");
    }
    protected void Button4_Click(object sender, EventArgs e)
    {
        SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["connectionsqlserver"].ConnectionString);
        string sql = "select count(*) from register where username = '" + TextBox1.Text + "'";
        con.Open();
        SqlCommand cmd1=new SqlCommand(sql,con);
        int count = Convert.ToInt32(cmd1.ExecuteScalar());
        if (count > 0)
        {
            Response.Write("<script>alert('用户名不可用！');</script>");
        }
        else
        {

            Response.Write("<script>alert('用户名可以使用！');</script>");
        }
        con.Close();
    }


  
}