批量上传功能

最近的项目要做批量上传功能，初次接触，绕了好多弯：

就应用来说，批量上传目前有两种方式，一种是添加一个文件上传一个文件，例如live mail；另外一种是多次添加，统一上传的方式，例如126邮箱。

我初次使用的是live mail的方式

前台代码如下：

 

<asp:FileUpload ID="FileUpload" runat="server" Width="90%" Visible="false" />
<asp:Button ID="BtnAddUpload" runat="server" Text="添加附件" OnClick="BtnAddUpload_Click" />
<br />
<div id="divFiles" runat="server">
    <asp:GridView ID="GVUpload" SkinID="OrdinaryGridView" runat="server" DataKeyNames="KnowledgeStoreId,KnowledgeAnnexID,AnnexName" Width="100%" OnRowDeleting="GVUpload_RowDeleting">
        <Columns>
            <asp:BoundField DataField="AnnexName" HeaderText="文件名" ItemStyle-Width="60%" />
            <asp:TemplateField><ItemTemplate><a href='<%#Eval("FilePath") %>' target="_blank"><%#Eval("AnnexName")%></a></ItemTemplate></asp:TemplateField>
            <asp:CommandField ButtonType="Link" ShowDeleteButton="true" DeleteText="移除" />
        </Columns>
    </asp:GridView>
</div>

 

后台获取文件代码：

 

if (FileUpload.HasFile)
            {
                //建立文件夹
                string mainPath = indexer.SearchConfiguration.FilePath;
                mainPath = Server.MapPath(mainPath);
                if (mainPath.LastIndexOf('\\') != mainPath.Length - 1)
                {
                    mainPath += "\\";
                }
                string subPath = "";
                if (BtnDel.Visible)
                {
                    subPath = mainPath + Request.Params["TypeId"].ToString().Trim();

                }
                else
                {
                    if (string.IsNullOrEmpty(HFFiles.Value))
                    {
                        HFFiles.Value = Guid.NewGuid().ToString();
                    }
                    subPath = mainPath + "temp_" + HFFiles.Value;
                }
                if (!Directory.Exists(subPath))
                {
                    Directory.CreateDirectory(subPath);
                }
                string fileName = FileUpload.FileName;
                //保存文件
                if (!File.Exists(subPath + "\\" + fileName))
                {
                    FileUpload.PostedFile.SaveAs(subPath + "\\" + fileName);
                }
                else
                {
                    Alert("此文件已经存在，请修改文件名");
                    return;
                }
            }

 

后来发现还是网易的方式比较方便，实现起来也简单

前台代码：

 

        <p id="FileList">
            <input id="File1" type="file" runat="server" size="50" name="File"/></p>
        <script language="javascript" type="text/javascript">   
        function  addFile()   
                  {   
                          var   filebutton   =   '<br/><input   type="file"   size="50"   name="File"   class="ButtonCss"   />';   
                          document.getElementById('FileList').insertAdjacentHTML("beforeEnd",filebutton);   
                  }   
        </script>
        <input id="BtnAdd" type="button" value="添加" onclick="addFile();" />

后台获取：

 

//直接取所有文件            
HttpFileCollection hfCollection = Request.Files;