[研究][ASP.NET]Exception ex, ex.Message, ex.Message.ToString() 比較
2022-08-10
環境：Visual Studio 2022 + ASP.NET + WebForm + Web Application + C#
********************************************************************************
Default.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs"
Inherits="WebApplication17.Default" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
</head>
<body>
<form id="form1" runat="server">
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox><br />
<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox><br />
<asp:Button ID="Button1" runat="server" Text="Button"
OnClick="Button1_Click" /><br />
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
</form>
</body>
</html>
|
Default.aspx.cs
using System;
namespace WebApplication17
{
public partial class Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
Int32.TryParse(TextBox1.Text, out int a);
Int32.TryParse(TextBox2.Text, out int b);
Label1.Text = (a / b).ToString();
}
}
}
|
(下圖)詳細除錯資訊
********************************************************************************
加上 try catch 後
Default.aspx.cs
using System;
namespace WebApplication17
{
public partial class Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
try
{
Int32.TryParse(TextBox1.Text, out int a);
Int32.TryParse(TextBox2.Text, out int b);
Label1.Text = (a / b).ToString();
}
catch (Exception ex)
{
var c1 = ex;
var c2 = ex.Message;
var c3 = ex.Message.ToString();
Label1.Text = ex.Message;
var c4 = "test";
}
}
}
}
|
(下圖) ex 是 Exception 類型的物件
(完)
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