執行過程時刷新頁面

我創建了一個用於提取數據的界面，有幾個簡單的步驟。執行過程時刷新頁面

用戶從下拉框中選擇他們想要的數據，他們點擊「檢查可用」按鈕，如果有可用的記錄，顯示「發送請求」按鈕。

點擊發送請求按鈕後，SQL表被髮送到excel文件，該文件稍微用vba處理，然後用戶通過C＃發送郵件並鏈接到該excel文件。

我面臨的問題是，用戶在一兩秒後不耐煩，並開始反覆搗碎「發送請求」按鈕。這種急躁使應用程序崩潰。

我怎樣才能使頁面的行爲，以便點擊「發送請求」後，頁面刷新，但過程仍然通過服務器進行，電子郵件仍然從C＃發送。

public void SendRequest_Click(object sender, EventArgs e) 
{  
    //Insert amazing line of code that refreshes the web form but does everything beyond this line 

    SendRequest.Visible = false; 
    //Creating a new class 
    QueryMule mule = new QueryMule(); 
    Label11.Visible = true; 
    string myfilename = Label3.Text; 
    string splitusernum = Label4.Text; 
    string dtablenum = Label4.Text; 
    string exportnum = Label4.Text; 
    //Export all export tables to mercuryexport excel file 
    mule.SQLExport(18, splitusernum, exportnum); 
    //Creating a new excel application to open the mercury template and run its macro 
    ExcelApp.Application appExl; 
    ExcelApp.Workbook workbook; 
    ExcelApp.Worksheet newSheet; 
    ExcelApp.Range Range; 
    appExl = new ExcelApp.Application(); 

    RegionName.SelectedItem.Value + timestampeddone + ".xlsm"; 

    workbook = appExl.Workbooks.Open(@"filepath", Missing.Value, 
     Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, 
     Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, 
     Missing.Value, Missing.Value, Missing.Value); 

    appExl.Visible = true; 
    appExl.DisplayAlerts = true; 

    System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage(); 
    message.To.Add '''REMOVED EMAIL ADDRESS 
    message.Subject = "Delivery System"; 
    message.From '''REMOVED EMAIL ADDRESS 
    message.Body = "filepath" + myfilename; 
    System.Net.Mail.SmtpClient smtp = new System.Net.Mail.SmtpClient("mailhost"); 
    smtp.Send(message); 

    Label4.Text = "Email Sent"; 

    mule.DropTable(dtablenum); 
    mule.DropTable1(dtablenum); 
    mule.DropTable2(dtablenum); 
    mule.DropExportTable(dtablenum); 
}

來源

2012-11-02 sgl

或許考慮更新面板或者至少是禁用「發送請求「按鈕之前回發 –