当数据库字段为varchar/char等字符串类型时，如果某字段为null此时保存到xml中的节点将不会显示，处理办法可以将保存xml的字段类型设置为image类型，具体参见示例。(记得在.aspx文件头中加入这句：<%@ Page validateRequest="false" %>)
1.html
<HTML> <HEAD> <title>StreamXml</title> <meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1"> <meta name="CODE_LANGUAGE" Content="C#"> <meta name="vs_defaultClientScript" content="JavaScript"> <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5"> </HEAD> <body MS_POSITIONING="GridLayout"> <form id="Form1" method="post" runat="server"> <asp:TextBox id="TextBox1" style="Z-INDEX: 101; LEFT: 8px; POSITION: absolute; TOP: 16px" runat="server"></asp:TextBox> <asp:TextBox id="TextBox2" style="Z-INDEX: 102; LEFT: 240px; POSITION: absolute; TOP: 16px" runat="server" TextMode="MultiLine" Height="160px" Width="352px"></asp:TextBox> <asp:Button id="Button1" style="Z-INDEX: 103; LEFT: 184px; POSITION: absolute; TOP: 16px" runat="server" Text="保存"></asp:Button> <asp:DataGrid id="DataGrid1" style="Z-INDEX: 104; LEFT: 8px; POSITION: absolute; TOP: 48px" runat="server" BorderColor="#CC9966" BorderStyle="None" BorderWidth="1px" BackColor="White" CellPadding="4" AutoGenerateColumns="False" OnItemCommand="Compare"> <FooterStyle ForeColor="#330099" BackColor="#FFFFCC"></FooterStyle> <SelectedItemStyle Font-Bold="True" ForeColor="#663399" BackColor="#FFCC66"></SelectedItemStyle> <ItemStyle ForeColor="#330099" BackColor="White"></ItemStyle> <HeaderStyle Font-Bold="True" ForeColor="#FFFFCC" BackColor="#990000"></HeaderStyle> <Columns> <asp:BoundColumn Visible="False" DataField="UserID" HeaderText="UserID"></asp:BoundColumn> <asp:BoundColumn DataField="UserName" HeaderText="UserName"></asp:BoundColumn> <asp:TemplateColumn HeaderText="比较"> <ItemTemplate> <asp:Button id="Button2" runat="server" Text="比较" CommandName="Compare"></asp:Button> </ItemTemplate> </asp:TemplateColumn> </Columns> <PagerStyle HorizontalAlign="Center" ForeColor="#330099" BackColor="#FFFFCC"></PagerStyle> </asp:DataGrid> <asp:TextBox id="TextBox3" style="Z-INDEX: 105; LEFT: 240px; POSITION: absolute; TOP: 192px" runat="server" TextMode="MultiLine" Height="144px" Width="352px"></asp:TextBox> </form> </body></HTML>public class StreamXml : System.Web.UI.Page
{
protected System.Web.UI.WebControls.TextBox TextBox1; protected System.Web.UI.WebControls.TextBox TextBox2; protected System.Web.UI.WebControls.Button Button1; protected System.Web.UI.WebControls.TextBox TextBox3; protected System.Web.UI.WebControls.DataGrid DataGrid1; private void Page_Load(object sender, System.EventArgs e)
{ if(!Page.IsPostBack) { BindData();
} }
BindData SaveXml SaveUserInfo GetDataSet Compare event Web Form Designer generated code save property
}if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[StreamXml]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)drop table [dbo].[StreamXml]GOif exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[UserInfo]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)drop table [dbo].[UserInfo]GOCREATE TABLE [dbo].[StreamXml] ( [UserID] [uniqueidentifier] NULL , [XmlStream] [image] NULL , [XmlString] [varchar] (500) COLLATE Chinese_PRC_CI_AS NULL ) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]GOCREATE TABLE [dbo].[UserInfo] ( [UserID] [uniqueidentifier] NULL , [UserName] [varchar] (50) COLLATE Chinese_PRC_CI_AS NULL ) ON [PRIMARY]GO
