恩@@..我是寫簡單的Winform + Window排程方式~去觸發網頁發送...

Winform 內容如下..

Imports System.IO

Public Class Form1

    Public Update_Url As String = ""

    Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
        '設定表單初始顯示位置
        Me.CenterToScreen()

        Me.MaximizeBox = False

        Me.FormBorderStyle = FormBorderStyle.FixedSingle

        '取得更新網址
        If File.Exists(Application.StartupPath & "\View_Url.txt") Then
            Update_Url = System.IO.File.ReadAllText(Application.StartupPath & "\View_Url.txt")
        End If
        If Update_Url <> "" Then
            Me.WebBrowser1.Navigate(Update_Url)
        Else
            Me.WebBrowser1.Navigate("about:尚未設定指定網址!")
        End If

    End Sub

    Private Sub WebBrowser1_DocumentCompleted(sender As System.Object, e As System.Windows.Forms.WebBrowserDocumentCompletedEventArgs) Handles WebBrowser1.DocumentCompleted
        Me.TextBox1.Text = WebBrowser1.Url.ToString
        Timer1.Interval = 3000
        Timer1.Enabled = True

    End Sub

    '設定3秒後關掉
    Private Sub Timer1_Tick(sender As System.Object, e As System.EventArgs) Handles Timer1.Tick
        Me.Close()
    End Sub
End Class

觸發要定期執行的功能頁

故每做一種要定期執行的網頁~我只要去改記事本的網址就好了@@"
例如這樣..

public class Class1 {
    static System.Windows.Forms.Timer myTimer = new System.Windows.Forms.Timer();
    static int alarmCounter = 1;
    static bool exitFlag = false;
 
    // This is the method to run when the timer is raised.
    private static void TimerEventProcessor(Object myObject,
                                            EventArgs myEventArgs) {
       myTimer.Stop();
 
       // Displays a message box asking whether to continue running the timer.
       if(MessageBox.Show("Continue running?", "Count is: " + alarmCounter, 
          MessageBoxButtons.YesNo) == DialogResult.Yes) {
          // Restarts the timer and increments the counter.
          alarmCounter +=1;
          myTimer.Enabled = true;
       }
       else {
          // Stops the timer.
          exitFlag = true;
       }
    }
 
    public static int Main() {
       /* Adds the event and the event handler for the method that will 
          process the timer event to the timer. */
       myTimer.Tick += new EventHandler(TimerEventProcessor);
 
       // Sets the timer interval to 5 seconds.
       myTimer.Interval = 5000;
       myTimer.Start();
 
       // Runs the timer, and raises the event.
       while(exitFlag == false) {
          // Processes all the events in the queue.
          Application.DoEvents();
       }
    return 0;
    }
 }

https://docs.microsoft.com/zh-tw/dotnet/api/system.windows.forms.timer?view=netcore-3.1

用

<meta http-equiv="refresh" content="5" />
自動Refresh網頁，每隔5秒就會自己更新一次。

這種 舊的方法可以達成您的需求喔!
比如
再aspx header 加入
<meta http-equiv="refresh" content="86400" />
就會每隔 86400秒=1天 就會reload 自己aspx 一次
您的aspx 寫 reload 就發送信件
這樣就可以每天發送信件了!
簡單一行收工!

用 SQL CLR 的方式如何呢?? 我是用 CLR 的方式來做..

DLL 只做傳遞 Email 的動作，再用 SQL Agent 去執行排程並寄件，執行上有任何問題也可以很快就可以了解與排除問題。