Finishing an Online E-Mail System in ASP.NET 2.0 - Moving Your Email
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Finally we come to the last piece -- moving selected e-mails, which is also accomplished through the ViewMail.aspx page. When clicking the Move To button, you can move the selected e-mails to another folder or mailbox. To do so, we'll follow the steps listed below:
1. Select the e-mails to move;
2. Select the destination folder or mailbox;
3. Click the Move To button to finish the task.
All the moving functions are fulfilled inside the MoveBtn_Click(object sender, EventArgs e) event, whose complete code is shown below.
protected void MoveBtn_Click(object sender,EventArgs e)
{
///define object
IMail mail = new Mail();
try
{
foreach(GridViewRow row in MailView.Rows)
{ ///find your control
CheckBox checkMail = (CheckBox)row.FindControl("CheckMail");
if(checkMail != null)
{
if(checkMail.Checked == true)
{
///execute the requested operation on the database
mail.MoveMail(Int32.Parse(MailView.DataKeys[row.RowIndex].Value.ToString()),
Int32.Parse(FolderList.SelectedValue));
}
}
}
///rebind the data to the control
BindMailData(nFolderID);
}
catch(Exception ex)
{ ///jump to the page responsible for dealing exception
Response.Redirect("ErrorPage.aspx?ErrorMsg=" + ex.Message.Replace("<br>","").Replace("n","")
+ "&ErrorUrl=" + Request.Url.ToString().Replace("<br>","").Replace("n",""));
}
}
To begin, we iterate through the mail list control named MailView to obtain the ID(s) of the e-mail to move, and then get the FolderID of the destination folder/mailbox, and finally call the MoveMail function to perform the movement. Similarly, after moving all the selected e-mails, you must remember to rebind data to the MailView control.
Conclusion
Whew, it has been a long a journey! However, this four-part tutorial has only presented you with a general framework for constructing an online e-mail system under ASP.NET 2.0/SQL Server 2005/.NET 2.0 environments, and you are sure to agree that there is nothing incredibly complex in it. Moreover, there are still a great many items that can be modified or enhanced, such as providing the function of strict user info authentication, using the popular AJAX technique to improve the users' real time experience, supplying the users with the ability to customize the system, and so on. Okay, there is no sense in piling up more words, just roll up your sleeves and give it a test run!
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