工作需要筆記

<asp:GridView ID="TaskGridView" runat="server" Width="100%" AutoGenerateColumns="False" CellPadding="5" AllowPaging="True" PageSize="20" OnPageIndexChanging="TaskGridView_PageIndexChanging">
    <Columns>
        <asp:TemplateField HeaderText="NO" ItemStyle-Width="5%">
            <ItemTemplate>
                <%#TaskGridView.PageIndex * TaskGridView.PageSize + TaskGridView.Rows.Count + 1 %>
            </ItemTemplate>
            <ItemStyle Width="5%" />
        </asp:TemplateField>                           
        <asp:TemplateField HeaderText="排序">
            <ItemTemplate><asp:Label ID="lb_排序" runat="server" CssClass="lb_排序" Text='<%# Bind("Order") %>'></asp:Label>
            </ItemTemplate>
            <ItemStyle Width="5%" />
        </asp:TemplateField>
        <asp:BoundField HeaderText="廣告服務名稱" DataField="Name" ItemStyle-Width="10%">
        <ItemStyle Width="20%" />
        </asp:BoundField>
        <asp:TemplateField HeaderText="圖片名稱">
            <ItemTemplate>
                <asp:Image ID="Image1" runat="server" ImageUrl='<%# @"upload\"+Eval("Img").ToString() %>'></asp:Image>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="連結網址">                                
            <ItemTemplate>
                <asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl='<%# Eval("Link") %>' Target="_blank"><%# Eval("Link") %></asp:HyperLink>
            </ItemTemplate>
            <ItemStyle Width="25%" />
        </asp:TemplateField>
        <asp:TemplateField HeaderText="編輯" ItemStyle-Width="15%">
            <ItemTemplate>
                <asp:LinkButton ID="lbtn_修改" runat="server" Text="編輯" CommandArgument='<%#Eval("No") %>' OnClick="lbtn_修改_Click" data-Order='<%#Eval("Order") %>' data-Name='<%#Eval("Name") %>' data-Img='<%#Eval("Img") %>' data-Link='<%#Eval("Link") %>'  />                                   
            </ItemTemplate>
            <ItemStyle Width="5%" />
        </asp:TemplateField>
        <asp:TemplateField HeaderText="刪除" ItemStyle-Width="15%">
            <ItemTemplate>
                <asp:LinkButton ID="lbtn_刪除" runat="server" Text="刪除" CommandArgument='<%#Eval("No") %>' CommandName='<%#Eval("Img") %>' OnClick="lbtn_刪除_Click" OnClientClick="return checkForm_del();" />
            </ItemTemplate>
            <ItemStyle Width="5%" />
        </asp:TemplateField>
    </Columns>
</asp:GridView>

protected XElement 讀寫XML(ref string result, XElement root = null)
{
    FileInfo logFile = new FileInfo(Server.MapPath(molo.XML.xmlPath));
    lock (logFile)
    {
        //取檔，檔案不存在建立XML
        if (!File.Exists(Server.MapPath(molo.XML.xmlPath)))
        {
            XmlDocument Xmldoc = new XmlDocument();
            ////從指定的字串載入XML文件
            Xmldoc.LoadXml("<?xml version=\"1.0\" encoding=\"utf-8\"?><MyRootNode />");
            Xmldoc.Save(Server.MapPath(molo.XML.xmlPath));
            //此為異常處理，寫log記錄
            string 內容 = "讀取廣告失敗：找不到檔案重新建立\t時間：" + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
            all.寫入記錄("", molo.errlog.檔名_XMLerror, 內容, true);
        }
        if (root == null) //讀取
        {
            root = XElement.Load(Server.MapPath(molo.XML.xmlPath));
            result = "成功";
        }
        else   //寫入
        {
            try
            {
                root.Save(Server.MapPath(molo.XML.xmlPath));
                result = "成功";
            }
            catch (Exception ex)
            {
                result = "寫入失敗\t" + ex.ToString();
            }
        }
    }
    return root;
}

//新建XML文件類別
XmlDocument Xmldoc = new XmlDocument();
//從指定的路徑載入XML文件
string result = "";
XElement root = 讀寫XML(ref result);
Xmldoc.LoadXml(root.ToString());
//建立此物件，並輸入透過StringReader讀取Xmldoc中的Xmldoc字串輸出
XmlReader Xmlreader = XmlReader.Create(new System.IO.StringReader(Xmldoc.OuterXml));
//建立DataSet
DataSet ds = new DataSet();
//透過DataSet的ReadXml方法來讀取Xmlreader資料
ds.ReadXml(Xmlreader);
if (ds != null)
{
    if (ds.Tables.Count > 0)
    {
        TaskGridView.DataSource = ds;
    }else
    {
        TaskGridView.DataSource = null;
                    
    }
    TaskGridView.DataBind();
}