旋转图像
aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Rotate.aspx.cs" Inherits="Rotate" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>图像翻转</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Image ID="Image1" runat="server" ImageUrl="~/sample.jpg" />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<asp:DropDownList ID="DropDownList1" runat="server">
<asp:ListItem Value="Rotate180FlipX">垂直翻转180度</asp:ListItem>
<asp:ListItem Value="Rotate180FlipY">水平翻转180度</asp:ListItem>
<asp:ListItem Value="Rotate90FlipNone">旋转90度</asp:ListItem>
<asp:ListItem Value="Rotate180FlipNone">旋转180度</asp:ListItem>
</asp:DropDownList>
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" /></div>
</form>
</body>
</html>
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Rotate.aspx.cs" Inherits="Rotate" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>图像翻转</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Image ID="Image1" runat="server" ImageUrl="~/sample.jpg" />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<asp:DropDownList ID="DropDownList1" runat="server">
<asp:ListItem Value="Rotate180FlipX">垂直翻转180度</asp:ListItem>
<asp:ListItem Value="Rotate180FlipY">水平翻转180度</asp:ListItem>
<asp:ListItem Value="Rotate90FlipNone">旋转90度</asp:ListItem>
<asp:ListItem Value="Rotate180FlipNone">旋转180度</asp:ListItem>
</asp:DropDownList>
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" /></div>
</form>
</body>
</html>
aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
public partial class Rotate : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string imgpath = Server.MapPath("temp.jpg");
//如果不存在一个临时图像文件,则生成一个临时图像文件
if (!File.Exists(imgpath))
{
File.Copy(Server.MapPath("sample.jpg"), imgpath);
}
}
public string ReversalImage(string ch)
{
string imgpath = Server.MapPath("temp.jpg");
Bitmap image = new Bitmap(imgpath);
//翻转图像
switch (ch)
{
case "Rotate180FlipX":
image.RotateFlip(RotateFlipType.Rotate180FlipX);
break;
case "Rotate180FlipY":
image.RotateFlip(RotateFlipType.Rotate180FlipY);
break;
case "Rotate90FlipNone":
image.RotateFlip(RotateFlipType.Rotate90FlipNone);
break;
case "Rotate180FlipNone":
image.RotateFlip(RotateFlipType.Rotate180FlipNone);
break;
default:
image.RotateFlip(RotateFlipType.RotateNoneFlipNone);
break;
}
//把图像保存到临时文件
image.Save(imgpath, ImageFormat.Jpeg);
return imgpath;
}
protected void Button1_Click(object sender, EventArgs e)
{
Image1.ImageUrl = ReversalImage(DropDownList1.SelectedItem.Value);
}
}
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
public partial class Rotate : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string imgpath = Server.MapPath("temp.jpg");
//如果不存在一个临时图像文件,则生成一个临时图像文件
if (!File.Exists(imgpath))
{
File.Copy(Server.MapPath("sample.jpg"), imgpath);
}
}
public string ReversalImage(string ch)
{
string imgpath = Server.MapPath("temp.jpg");
Bitmap image = new Bitmap(imgpath);
//翻转图像
switch (ch)
{
case "Rotate180FlipX":
image.RotateFlip(RotateFlipType.Rotate180FlipX);
break;
case "Rotate180FlipY":
image.RotateFlip(RotateFlipType.Rotate180FlipY);
break;
case "Rotate90FlipNone":
image.RotateFlip(RotateFlipType.Rotate90FlipNone);
break;
case "Rotate180FlipNone":
image.RotateFlip(RotateFlipType.Rotate180FlipNone);
break;
default:
image.RotateFlip(RotateFlipType.RotateNoneFlipNone);
break;
}
//把图像保存到临时文件
image.Save(imgpath, ImageFormat.Jpeg);
return imgpath;
}
protected void Button1_Click(object sender, EventArgs e)
{
Image1.ImageUrl = ReversalImage(DropDownList1.SelectedItem.Value);
}
}