Sharepoint 列表 附件 小功能

代码如下：

Page_Load方法

       cblattCase.Items.Clear();

                for (int i = 0; i < item.Attachments.Count; i++)
                {
                    cblattCase.Items.Add(new ListItem("<a href='" + GetSPListItemAttachmentUrl(item, i) + "' target='_black'>" + item.Attachments[i] + "<a>", i.ToString()));
                }

附件添加及删除

 /// <summary>
    /// 添加附件
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void btnUploadCase_OnClick(object sender, EventArgs e)
    {
        string id = Request["id"];
        if (id == null)
        {
            ShowErr("请先保存草稿");
            return;
        }
        if (fudCase.FileBytes.Length == 0)
        {
            ShowErr("请先选择上传文件");
            return;
        }
        //SPList list = SPContext.Current.Web.Lists["servicerequest"];

        SPListItem item = null;
        //case附件删除
        item = list.Items.GetItemById(int.Parse(Request["id"]));
        //case附件上传 
        for (int i = 0; i < item.Attachments.Count; i++)
        {
            if (fudCase.FileName == item.Attachments[i])
            {
                ShowErr("文件名重复！");
                return;
            }
        }
        item.Attachments.Add(fudCase.FileName, fudCase.FileBytes);
        item.Update();
        //刷新控件

        cblattCase.Items.Clear();


        for (int i = 0; i < item.Attachments.Count; i++)
        {
            cblattCase.Items.Add(new ListItem("<a href='" + GetSPListItemAttachmentUrl(item, i) + "' target='_black'>" + item.Attachments[i] + "<a>", i.ToString()));
        }

    }
    public static string GetSPListItemAttachmentUrl(SPListItem item, int index)
    {

        return item.Attachments.UrlPrefix + item.Attachments[index];
    }
    /// <summary>
    /// 删除附件
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void btnDelCase_OnClick(object sender, EventArgs e)
    {
        if (id == null)
        {
            ShowErr("请先保存草稿");
            return;
        }


        SPListItem item = null;
        //case附件删除
        item = list.Items.GetItemById(int.Parse(Request["id"]));
        List<string> attName = new List<string>();
        if (item.Attachments.Count > 0)
        {
            int tmpIndex = 0;
            foreach (ListItem lItem in cblattCase.Items)
            {
                if (lItem.Selected)
                {
                    attName.Add(item.Attachments[tmpIndex]);
                }
                tmpIndex++;
            }

            for (int i = 0; i < attName.Count; i++)
            {
                item.Attachments.Delete(attName[i]);
            }
            item.Update();
        }

        //刷新控件

        cblattCase.Items.Clear();

        for (int i = 0; i < item.Attachments.Count; i++)
        {
            cblattCase.Items.Add(new ListItem("<a href='" + GetSPListItemAttachmentUrl(item, i) + "' target='_black'>" + item.Attachments[i] + "<a>", item.Attachments[i]));
        }

    }

前端代码:

           <tr>
                <td class="padding" colspan="6" height="30">
                    <asp:FileUpload ID="fudCase" runat="server" CssClass="textboxCss1"  width="500"/>
                    <asp:Button ID="btnUploadCase" runat="server"  Text="上传附件" OnClick="btnUploadCase_OnClick" CssClass="textboxCss1" />
                    <asp:Button ID="btnDelCase" runat="server"  Text="删除附件" OnClick="btnDelCase_OnClick" CssClass="textboxCss1" />
                </td>
            </tr>
            <tr>
                <td style="padding:8px;" colspan="3">
                    <asp:CheckBoxList ID="cblattCase" runat="server" AutoPostBack="false"></asp:CheckBoxList>
                </td>
            </tr>