Question

我有一个程序可以通过调度程序自动启动Windows。它的作用是运行查询，然后通过电子邮件发送查询结果。这一切都有效。我们有10个位置，所以我将编辑它，因此它发送5个不同的电子邮件...我遇到的问题是如何检查多个tableadapters是否具有空值。您将看到我检查“Paid_Out_TB”以查看它是否有0行...如果有0行程序关闭。我想做的是检查它是否有0行。如果是，请在电子邮件中报告表数据，然后检查下一个tableadapter，是否包含行？如果是这样的话，那么报告......除去没有数据的任何表...问题是......如果没有数据，我需要告诉它做某事......有什么建议吗？

    Imports System.Net.Mail
    Imports System.Net.Mail
Imports System.Linq

Public Class Form1

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        'TODO: This line of code loads data into the 'DataSet.Paid_Out_Tb' table. You can move, or remove it, as needed.

        Try
            Dim SmtpServer As New SmtpClient()
            Dim mail As New MailMessage()
            Me.Paid_Out_TbTableAdapter.Fill(Me.DataSet.Paid_Out_Tb)
            Me.DataTable1TableAdapter.Fill(Me.DataSet.DataTable1)
            Dim payouts = _
            <html>
                <body>
                    <table border="1">
                        <tr><th>Store #</th><th>Date</th><th>Amount</th><th>User</th><th>Comment</th></tr>
                        <%= From paidOut In Me.DataSet.Paid_Out_Tb.AsEnumerable _
                            Select <tr><td><%= paidOut.Store_Id %></td>
                                       <td><%= Convert.ToDateTime(paidOut.Paid_Out_Datetime).ToString("M/d/yy") %>
                                       </td><td><%= "$" & paidOut.Paid_Out_Amount.ToString("0.00") %></td>
                                       <td><%= paidOut.Update_UserName %></td>
                                       <td><%= paidOut.Paid_Out_Comment %></td></tr> %>
                    </table>
                </body>

            </html>
            Dim Payouts453 = _
            <html>
                <body>
                    <table border="1">
                        <tr><th>Store #</th><th>Date</th><th>Amount</th><th>User</th><th>Comment</th></tr>
                        <%= From paidOut In Me.DataSet.DataTable1.AsEnumerable _
                            Select <tr><td><%= paidOut.Store_Id %></td>
                                       <td><%= Convert.ToDateTime(paidOut.Paid_Out_Datetime).ToString("M/d/yy") %>
                                       </td><td><%= "$" & paidOut.Paid_Out_Amount.ToString("0.00") %></td>
                                       <td><%= paidOut.Update_UserName %></td>
                                       <td><%= paidOut.Paid_Out_Comment %></td></tr> %>
                    </table>
                </body>

            </html>
            If (Me.DataSet.Paid_Out_Tb.Count = 0) Then 'This cheks to see if the dataset is Null.  We do not want to email if the set is Null

                Me.Close()


            Else

                SmtpServer.Credentials = New  _
                Net.NetworkCredential("****", "****") 'Assign the network credentials
                SmtpServer.Port = 25 'Assign the SMTP Port
                SmtpServer.Host = "10.0.*.**" 'Assign the Server IP
                mail = New MailMessage() 'Starts a mail message
                mail.From = New MailAddress("*@**.com") 'Sets the "FROM" address
                mail.To.Add("**@**.com") 'Sets the "To" address
                'mail.CC.Add("**@**.com") 'set this if you would like to CC
                mail.Subject = "Paid Out Report for 1929"
                mail.IsBodyHtml = True
                mail.Body = payouts.ToString() & Payouts453.ToString() 'this is to add another chart  You would use a seperate dataset obviously
                SmtpServer.Send(mail)
                'MsgBox("mail send")
            End If

        Catch ex As Exception

            MsgBox(ex.ToString)


        End Try






        Me.Close() 'Closes the program when it's finished.


    End Sub

Answer 1

我通过使用“If NOT”“Then”语句完成了此操作。如果tableadapter为“空”，则允许您继续

如何在2个不同的数据集上检查Null而不输出空表

1 个答案: