Question

我有一个fileUpload控件和位于UpdatePanel内的datalist中的Button，用户需要使用fileUpload控件和按钮上传文件。如何为按钮添加回发触发器，以便通过fileupload将所选文件上传到服务器。

         <asp:UpdatePanel runat="server" ID="UpdatePanel">
                    <ContentTemplate>

     <asp:DataList ID="dlComments" runat="server" Width="100%" 
                                      onitemcommand="dlComments_ItemCommand" DataKeyField="CommentID" 
                                      onitemdatabound="dlComments_ItemDataBound" >
                                 <ItemTemplate>
<asp:Label ID="lblSnNo" runat="server" class="label-small-grey" Text='<%#Eval("CommentNumber") %>' ></asp:Label>
<label style="font-size:12px; font-style:normal"><%#Eval("CommentText") %></label>
              <textarea runat="server" id="txtaCommentText" style="resize:none;" rows="3" cols="3" class="form-control"  placeholder="Your Comments Here"></textarea><Br>
            <asp:FileUpload ID="fileUploadReply" multiple="true" runat="server" class=""   /></p><br>
            <asp:Button ID="btnPostReplyComment" CommandName="PostReplyComment" class="btn btn-primary" runat="server" Text="Post" />

    </ItemTemplate>

                        </asp:DataList>
                   </ContentTemplate>



        <Trigger>
        </Triggers>
            </asp:UpdatePanel>

在codeBehind上，

 protected void dlComments_ItemCommand(object source, DataListCommandEventArgs e)
{
if (e.CommandName == "PostReplyComment")
{

FileUpload fileUploadReply = (FileUpload)e.Item.FindControl("fileUploadReply");
 functionTOStoreCommetns();
     string filename = Path.GetFileName(fileUploadReply.FileName);
            fileUploadReply.SaveAs(Server.MapPath("~/") + filename);
}


}

如果文件不在datalist中，则通过将PostBackTrigger添加到UpdatePanel来上传文件请帮助为buttin添加回发触发器

Answer 1

在您的DataList ItemDataBound事件中，执行以下操作：

protected void dlComments_ItemDataBound(object sender, DataListItemEventArgs e)
{
    FileUpload lFileUpload = (FileUpload)e.Item.FindControl("fileUploadReply");
    PostBackTrigger lTrigger = new PostBackTrigger();
    lTrigger.ControlID = lFileUpload.ID;
    UpdatePanel.Triggers.Add(lTrigger);
}

在updatepanel内设置datalist内按钮的回发触发器

1 个答案: