图片在xml和数据库的存储和在web页的显示
2007-10-07 00:41
507 查看
一种是用字节数组表示二进制数据
<%@ Page Language="C#" %>
<%@ Import Namespace="System.Xml" %>
<%@ Import Namespace="System.IO" %>
<%@ Import Namespace="System.Xml.XPath" %>
<script runat="server">
void Page_Load(object sender, EventArgs e)
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Writing Images using XmlWriter</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:label id="lblResult" runat="server" />
</div>
</form>
</body>
</html>
读取显示
System.Xml.XPath.XPathDocument xdoc = new XPathDocument(xmlFilePath);
XPathNavigator xNav = xdoc.CreateNavigator();
XPathNodeIterator nodes = xNav.Select("employee/image");
string file = string.Empty;
while(nodes.MoveNext())
int size = System.Text.Encoding.Default.GetByteCount(file);
XmlReader xmlRead = XmlReader.Create(xmlFilePath);
while(xmlRead.Read())
<%@ Page Language="C#" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<script runat="server">
string CanUploadExt = "|.jpg|.gif|.bmp|.png|.jpeg|";
protected void Page_Load(object sender, EventArgs e)
protected void Button1_Click(object sender, EventArgs e)
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>FileUpload 服务器控件</title>
<script type="text/javascript" language="javascript">
var CanUploadExt = "<%=CanUploadExt %>"
function CheckExt()
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false">
<Columns>
<asp:BoundField HeaderText="姓名" NullDisplayText="未输入" DataField="Title" />
<asp:ImageField HeaderText="照片" DataImageUrlField="id"
DataImageUrlFormatString="ShowImageCS.aspx?id={0}" NullImageUrl="~/images/none.gif">
</asp:ImageField>
</Columns>
</asp:GridView>
姓名：<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:FileUpload ID="FileUpload1" runat="server" />
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" OnClientClick="return CheckExt()"
Text="上传" />
</form>
</body>
</html>
显示
<%@ Page Language="C#" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
</script>
<%@ Page Language="C#" %>
<%@ Import Namespace="System.Xml" %>
<%@ Import Namespace="System.IO" %>
<%@ Import Namespace="System.Xml.XPath" %>
<script runat="server">
void Page_Load(object sender, EventArgs e)
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Writing Images using XmlWriter</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:label id="lblResult" runat="server" />
</div>
</form>
</body>
</html>
读取显示
System.Xml.XPath.XPathDocument xdoc = new XPathDocument(xmlFilePath);
XPathNavigator xNav = xdoc.CreateNavigator();
XPathNodeIterator nodes = xNav.Select("employee/image");
string file = string.Empty;
while(nodes.MoveNext())
int size = System.Text.Encoding.Default.GetByteCount(file);
XmlReader xmlRead = XmlReader.Create(xmlFilePath);
while(xmlRead.Read())
<%@ Page Language="C#" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<script runat="server">
string CanUploadExt = "|.jpg|.gif|.bmp|.png|.jpeg|";
protected void Page_Load(object sender, EventArgs e)
protected void Button1_Click(object sender, EventArgs e)
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>FileUpload 服务器控件</title>
<script type="text/javascript" language="javascript">
var CanUploadExt = "<%=CanUploadExt %>"
function CheckExt()
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false">
<Columns>
<asp:BoundField HeaderText="姓名" NullDisplayText="未输入" DataField="Title" />
<asp:ImageField HeaderText="照片" DataImageUrlField="id"
DataImageUrlFormatString="ShowImageCS.aspx?id={0}" NullImageUrl="~/images/none.gif">
</asp:ImageField>
</Columns>
</asp:GridView>
姓名：<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:FileUpload ID="FileUpload1" runat="server" />
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" OnClientClick="return CheckExt()"
Text="上传" />
</form>
</body>
</html>
显示
<%@ Page Language="C#" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
</script>
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