异常新手入门

之前很差好考虑异常，测试的时候麻烦太多，简记一下实体层的简单小异常，告诫本身一下，初学者也可参考一下

自定义异常类：

/// <summary>
///Exception 的摘要说明
/// </summary>
public  class Exception1:Exception
{
    public Exception1(string msg) : base(msg) { }
    public Exception1( string s,Exception e) :base( s, e ) {}
}

实体类抛异常：

namespace TOOL
{
    public class model
    {
        private int _dxbh;

        public int DHHM
        {
            set
            {
                try
                {
                    _dxbh = value;

                    string dh = @"^\d{5}$";

                    if (!Regex.IsMatch(_dxbh.ToString(), dh))
                    {
                        throw new Exception1("电话号码错误");
                    }


                }
                catch( Exception e1)
                {
                    throw e1;
                }
            }
            get
            {
                return _dxbh;
            }
        }
    }
}

页面捕获

protected void Page_Load(object sender, EventArgs e)
    {

        try
        {
            model m = new model();
            m.DHHM = 1;
        }
        catch (Exception1 e1)
        {
            TextBox1.Text = e1.Message;
            Response.Write("<script>alert('" + e1.Message + "');</script>");

        }

    }