Code
protected void btnAdd_Click(object sender, EventArgs e)
    {
       
        //
        LinkAdminBbs lab = new LinkAdminBbs();
        lab.Busername = this.txtBuserName.Text;
        lab.Busertel = this.txtBuserTel.Text;
        lab.Buserct = this.txtBuserCt.Text;
        if (this.rbtBuserNan.Checked)
        {
            lab.Busersex = "男";
        }
        else
        {
            lab.Busersex = "女";
        }
        if(txtBuserName.Text.Trim()==""||txtBuserTel.Text.Trim()=="")
        {
            this.Label1.Text="<font color=red>-_-提交失败！麻烦您！认真填写！</font>";
        }
        else
        {
          if (LinAdminBbsOperate.InsertOperater(lab))
            {
            this.Label1.Text="<font color=green >^_^提交成功！谢谢支持！您的反馈我们已经收到！</font>";
            txtBuserName.Text = "";
            txtBuserTel.Text = "";
            txtBuserCt.Text = "";
            }
          else
            {
            Response.Write("F");
            }
        }
    }

Code
public class LinAdminBbsOperate
{
    public LinAdminBbsOperate()
    {
        //
        // TODO: 在此处添加构造函数逻辑
        //
    }
    ////////////////定义插入类//////////////////////
    public static bool InsertOperater(LinkAdminBbs LAB)
    {
        try
        {
            SqlConnection con = DBAccess.createsqlcon();
            con.Open();
            SqlCommand cmd = new SqlCommand("insert into BBS (Bname,Bsex,Btel,Bct) values(@Bname,@Bsex,@Btel,@Bct)", con);

            SqlParameter para = new SqlParameter("@Bname", SqlDbType.NVarChar, 8);
            para.Value = LAB.Busername;
            cmd.Parameters.Add(para);
            para = new SqlParameter("@Bsex", SqlDbType.NVarChar, 2);
            para.Value = LAB.Busersex;
            cmd.Parameters.Add(para);
            para = new SqlParameter("@Btel", SqlDbType.NVarChar, 20);
            para.Value = LAB.Busertel;
            cmd.Parameters.Add(para);
            para = new SqlParameter("@Bct", SqlDbType.NVarChar, 100);
            para.Value = LAB.Buserct;
            cmd.Parameters.Add(para);
            //执行
            cmd.ExecuteNonQuery();
            return true;
        }
        catch (Exception e)
        {
            return false;
        }
        
    }

Code
public class LinkAdminBbs
{
    /// <summary>
    /////////////////////////留言板////////.
    //定义实体
    /// </summary>
    public string Busername;
    public string Busertel;
    public string Buserct;
    public string Busersex;

    public LinkAdminBbs()
    {
        //
        // TODO: 在此处添加构造函数逻辑
        //
    }
}