Place Checkbox in listview

Question

Я создал форму, в которой есть список, в котором есть идентификатор электронной почты, который поступает из таблиц базы данных. На кнопке & при нажатии кнопки выбраны флажки определенного идентификатора электронной почты, чтобы отправить почту. Пожалуйста, дайте мне знать, как это сделать.

Это мой код, на котором я сейчас работаю.

ASPX Код

<div id="send_request_form" runat="server" class="form2"> 
         <div style="width:100%; padding:20px 0 20px 0; color:#fff; background:#3d76b0; font-weight:bold; text-align:center; font-size:24px; font-family:Calibri">Select Companies</div> 

         <asp:ListView ID="lvCustomers" runat="server" GroupPlaceholderID="groupPlaceHolder1" 
      ItemPlaceholderID="itemPlaceHolder1"> 
      <LayoutTemplate> 
       <table class="client_list" cellpadding="0" cellspacing="0"> 
        <tr> 
         <td style="padding:10px; text-align:center; width:15%; font-size:16px; font-weight:bold; background:#c4dbf2; color:#fff"> 
          Id 
         </td> 
         <td style="padding:10px; text-align:center; width:60%; font-size:16px; font-weight:bold; background:#c4dbf2; color:#fff"> 
          Company Name 
         </td> 
         <td style="padding:10px; text-align:center; width:25%; font-size:16px; font-weight:bold; background:#c4dbf2; color:#fff"> 
          Email 
         </td > 

        </tr> 
        <asp:PlaceHolder runat="server" ID="groupPlaceHolder1"></asp:PlaceHolder> 
        <tr> 
         <td colspan = "3"> 
          <asp:DataPager ID="DataPager1" runat="server" PagedControlID="lvCustomers" PageSize="20"> 
           <Fields> 
            <asp:NextPreviousPagerField ButtonType="Link" ShowFirstPageButton="false" ShowPreviousPageButton="true" 
             ShowNextPageButton="false" /> 
            <asp:NumericPagerField ButtonType="Link" Visible="false" /> 
            <asp:NextPreviousPagerField ButtonType="Link" ShowNextPageButton="true" ShowLastPageButton="false" ShowPreviousPageButton = "false" /> 
           </Fields> 
          </asp:DataPager> 
         </td> 
        </tr> 
       </table> 
      </LayoutTemplate> 
      <GroupTemplate> 
       <tr> 
        <asp:PlaceHolder runat="server" ID="itemPlaceHolder1"></asp:PlaceHolder> 
       </tr> 
      </GroupTemplate> 
      <ItemTemplate> 
       <td> 
        <%# Eval("Comp_ID")%> 
       </td> 
       <td> 
        <%# Eval("client_name")%> 
       </td> 
       <td> 

       <%# Eval("email_id")%> 

       </td> 
      </ItemTemplate> 
     </asp:ListView> 
     <asp:CheckBox ID="CheckBox1" runat="server" /> 
         <asp:Button ID="sending" runat="server" Text="Send Request" /> 
        </div> 
       </div> 

VB код

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load 
      If Not Me.IsPostBack Then 
       Me.BindListView() 
      End If 
      add_client.Visible = False 
      send_request_form.Visible = False 
      headings.Text = "Dashboard" 
     End Sub 

    Private Sub BindListView() 
      Dim con As New SqlConnection("Data Source=SuRaj;Initial Catalog=Brandstik2; Integrated Security=True") 
       Using cmd As New SqlCommand() 
       cmd.CommandText = "SELECT Comp_ID, client_name, email_id FROM BrandstikTesti" 
        cmd.Connection = con 
        Using sda As New SqlDataAdapter(cmd) 
         Dim dt As New DataTable() 
         sda.Fill(dt) 
         lvCustomers.DataSource = dt 
         lvCustomers.DataBind() 
        End Using 
       End Using 
     End Sub 

Правки Как Отдается в ответ.

Protected Sub sending_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles sending.Click 
     Dim emails As New List(Of String)() 
     For Each item As ListViewItem In lvCustomers.Items 
      Dim ck As CheckBox = DirectCast(item.FindControl("CheckBox1"), CheckBox) 
      If ck.Checked Then 
       Try 
        Dim mail As New MailMessage() 
        Dim SmtpServer As New SmtpClient() 
        mail.Bcc.Add(lbl.text) 
        mail.From = New MailAddress("something@gmail.com", "SuRaj_ Email Test") 
        mail.Subject = "Email Testing" 
        mail.Body = "http://www.something.com/feedback.aspx?" + 
        mail.IsBodyHtml = True 
        SmtpServer.Port = 25 
        SmtpServer.Credentials = New System.Net.NetworkCredential("something@gmail.com", "123") 
        SmtpServer.Host = "smtp.gmail.com" 
        SmtpServer.EnableSsl = True 
        SmtpServer.Send(mail) 
        MsgBox("Mail Sent") 
       Catch error_t As Exception 
        MsgBox(error_t.ToString) 
       End Try 
       emails.Add(DirectCast(item.FindControl("lbl"), Label).Text) 
      End If 
     Next 
    End Sub 

Answer 1

Вы должны изменить listview в ASPX, чтобы иметь checkbox внутри поля шаблона. Как и после.

<asp:ListView ID="lvCustomers" runat="server" GroupPlaceholderID="groupPlaceHolder1" 
    ItemPlaceholderID="itemPlaceHolder1"> 
    <LayoutTemplate> 
     <table class="client_list" cellpadding="0" cellspacing="0"> 
      <tr> 
       <td style="padding: 10px; text-align: center; width: 15%; font-size: 16px; font-weight: bold; background: #c4dbf2; color: #fff">Id 
       </td> 
       <td style="padding: 10px; text-align: center; width: 60%; font-size: 16px; font-weight: bold; background: #c4dbf2; color: #fff">Company Name 
       </td> 
       <td style="padding: 10px; text-align: center; width: 25%; font-size: 16px; font-weight: bold; background: #c4dbf2; color: #fff">Email 
       </td> 
       <td style="padding: 10px; text-align: center; width: 25%; font-size: 16px; font-weight: bold; background: #c4dbf2; color: #fff">Select one 
       </td> 
      </tr> 
      <asp:PlaceHolder runat="server" ID="groupPlaceHolder1"></asp:PlaceHolder> 
      <tr> 
       <td colspan="3"> 
        <asp:DataPager ID="DataPager1" runat="server" PagedControlID="lvCustomers" PageSize="20"> 
         <Fields> 
          <asp:NextPreviousPagerField ButtonType="Link" ShowFirstPageButton="false" ShowPreviousPageButton="true" 
           ShowNextPageButton="false" /> 
          <asp:NumericPagerField ButtonType="Link" Visible="false" /> 
          <asp:NextPreviousPagerField ButtonType="Link" ShowNextPageButton="true" ShowLastPageButton="false" ShowPreviousPageButton="false" /> 
         </Fields> 
        </asp:DataPager> 
       </td> 
      </tr> 
     </table> 
    </LayoutTemplate> 
    <GroupTemplate> 
     <tr> 
      <asp:PlaceHolder runat="server" ID="itemPlaceHolder1"></asp:PlaceHolder> 
     </tr> 
    </GroupTemplate> 
    <ItemTemplate> 
     <td> 
      <%# Eval("Comp_ID")%> 
     </td> 
     <td> 
      <%# Eval("client_name")%> 
     </td> 
     <td> 
      <asp:Label ID="lbl" runat="server" Text='<%# Eval("email_id")%>' ></asp:Label> 
     </td> 
     <td> 
      <asp:CheckBox ID="CheckBox1" runat="server" /> 
     </td> 
    </ItemTemplate> 
</asp:ListView> 

И нажимайте кнопку, используйте следующую команду, чтобы установить выбранный флажок.

Protected Sub sending_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles sending.Click 

     For Each item As ListViewItem In lvCustomers.Items 
      Dim ck As CheckBox = DirectCast(item.FindControl("CheckBox1"), CheckBox) 
      If ck.Checked Then 
       Try 
        Dim mail As New MailMessage() 
        Dim SmtpServer As New SmtpClient() 
        mail.Bcc.Add(DirectCast(item.FindControl("lbl"), Label).Text) 
        mail.From = New MailAddress("something@gmail.com", "SuRaj_ Email Test") 
        mail.Subject = "Email Testing" 
        mail.Body = "http://www.something.com/feedback.aspx?" + 
        mail.IsBodyHtml = True 
        SmtpServer.Port = 25 
        SmtpServer.Credentials = New System.Net.NetworkCredential("something@gmail.com", "123") 
        SmtpServer.Host = "smtp.gmail.com" 
        SmtpServer.EnableSsl = True 
        SmtpServer.Send(mail) 
        MsgBox("Mail Sent") 
       Catch error_t As Exception 
        MsgBox(error_t.ToString) 
       End Try 

      End If 
     Next 
    End Sub