Как сохранить несколько загруженных файлов на одной кнопке

Question

У меня есть gridview, у которого есть опция fileupload в одном столбце, я могу сохранить только один файл изображения за раз, но как сохранить несколько изображений, загруженных в разные строки gridview ? Мой дизайн страницы:

<div> 
    <br/> 
     <asp:Label ID="Label2" runat="server" Text="Label"></asp:Label>  
    <br/>     
     <asp:Label ID="Label1" runat="server" Font-Bold="True" ForeColor="#000099"></asp:Label> 
     <br/> 
      <asp:Button ID="button1" Text="Upload" runat="server" Width="73px" onclick="button1_Click" /> 
     <br/> 

<asp:GridView ID="grdimagepanel" runat="server" Width="100%" CssClass="GridBooking" 
                AutoGenerateColumns="False"> 
                <Columns> 
                 <asp:TemplateField HeaderText="File Path"> 
                  <ItemTemplate> 
                   <asp:FileUpload ID="fileupload1" runat="server" /> 

                  </ItemTemplate> 
                   </asp:TemplateField> 
                <asp:TemplateField HeaderText="Image Descriptions"> 
                  <ItemTemplate> 
                   <asp:TextBox ID="txtimagedescription" runat="server" 

                    CssClass="txtgrid1" Width="98%" ></asp:TextBox> 
                  </ItemTemplate> 
                  <HeaderStyle Width="75%" /> 
                 </asp:TemplateField> 
                 <asp:TemplateField HeaderText="Scanned"> 
                  <ItemTemplate> 
                   <table> 
                    <tr> 
                     <td> 
                      <asp:TextBox ID="txtimagedate" runat="server" 

                       Width="100px" CssClass="txtgrid" ></asp:TextBox> 
                     </td> 
                     <td> 
                      <asp:ImageButton ID="imgbtnScanDatetime" runat="server" 
                       CssClass="btncalnder" /> 
                      <%-- <asp:CalendarExtender ID="CalendarExtender4" runat="server" 
                       Format="MM-dd-yyyy" TargetControlID="txtimagedate"> 
                      </asp:CalendarExtender>--%> 
                     </td> 
                    </tr> 
                   </table> 
                  </ItemTemplate> 
                 </asp:TemplateField> 
                 <asp:TemplateField HeaderText=" "> 
                  <ItemTemplate> 
                   <asp:ImageButton ID="ImgbtnImageTab" runat="server" 
                     Width="10" 
                    Height="20" /> 

                  </ItemTemplate> 
                 </asp:TemplateField> 
                </Columns> 
               </asp:GridView> 
</div> 

Мой код позади страницы:

Protected Sub button1_Click(sender As Object, e As EventArgs) 
    For Each grdRow As GridViewRow In grdimagepanel.Rows 
     Dim fileupload1 As FileUpload = TryCast(Me.grdimagepanel.Rows(ViewState("SelectedRowIndex")).FindControl("fileupload1"), FileUpload) 

     'Dim fileupload1 As FileUpload = grdimagepanel.FindControl("fileupload1") 
     If fileupload1.HasFile Then 
      Try 

       If fileupload1.PostedFile.ContentType = "image/jpeg" Then 
        If fileupload1.PostedFile.ContentLength < 5120000 Then 
         Dim filename As String = Path.GetFileName(fileupload1.FileName) 
         fileupload1.SaveAs(Server.MapPath("~/F:\Abc\ImageUploaded\") & filename) 
         Label1.Text = "File uploaded successfully!" 
         Label2.Text = Server.MapPath(fileupload1.FileName) 
        Else 

         Label1.Text = "File maximum size is 500 Kb" 
        End If 
       Else 

        Label1.Text = "Only JPEG files are accepted!" 
       End If 
      Catch exc As Exception 

       Label1.Text = "The file could not be uploaded. The following error occured: " & exc.Message 
      End Try 
     End If 
    Next 
End Sub 

Answer 1

Пожалуйста, попробуйте ниже код:

У вас уже есть сетки строки, так что вы должны найти управления fileuplaod grdRow вместо использования SelectedRowIndex

Protected Sub button1_Click(sender As Object, e As EventArgs) 
    For Each grdRow As GridViewRow In grdimagepanel.Rows 
     Dim fileupload1 As FileUpload = TryCast(grdRow.FindControl("fileupload1"), FileUpload) 
     'Dim fileupload1 As FileUpload = grdimagepanel.FindControl("fileupload1") 
     If fileupload1.HasFile Then 
      Try 

       If fileupload1.PostedFile.ContentType = "image/jpeg" Then 
        If fileupload1.PostedFile.ContentLength < 5120000 Then 
         Dim filename As String = Path.GetFileName(fileupload1.FileName) 
         fileupload1.SaveAs(Server.MapPath("~/F:\ImageUploaded\") & filename) 
         Label1.Text = "File uploaded successfully!" 
         Label2.Text = Server.MapPath(fileupload1.FileName) 
        Else 

         Label1.Text = "File maximum size is 500 Kb" 
        End If 
       Else 

        Label1.Text = "Only JPEG files are accepted!" 
       End If 
      Catch exc As Exception 

       Label1.Text = "The file could not be uploaded. The following error occured: " & exc.Message 
      End Try 
     End If 
    Next 
End Sub