異常新手入門

之前很差好考慮異常，測試的時候麻煩太多，簡記一下實體層的簡單小異常，告誡本身一下，初學者也可參考一下

自定義異常類：

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

實體類拋異常：

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("電話號碼錯誤");
                    }


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

頁面捕獲

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>");

        }

    }