加水印的功能代码如下所示
代码
///
<summary>
/// 图片修改类,主要是用来保护图片版权的，版权归原作者所有
/// </summary>
public class picmark
{
#region "member fields"
private string modifyImagePath = null ;
private string drawedImagePath = null ;
private int rightSpace;
private int bottoamSpace;
private int lucencyPercent = 70 ;
private string outPath = null ;
#endregion
public picmark()
{
}
#region "propertys"
/// <summary>
/// 获取或设置要修改的图像路径
/// </summary>
public string ModifyImagePath
{
get { return this .modifyImagePath; }
set { this .modifyImagePath = value; }
}
/// <summary>
/// 获取或设置在画的图片路径(水印图片)
/// </summary>
public string DrawedImagePath
{
get { return this .drawedImagePath; }
set { this .drawedImagePath = value; }
}
/// <summary>
/// 获取或设置水印在修改图片中的右边距
/// </summary>
public int RightSpace
{
get { return this .rightSpace; }
set { this .rightSpace = value; }
}
// 获取或设置水印在修改图片中距底部的高度
public int BottoamSpace
{
get { return this .bottoamSpace; }
set { this .bottoamSpace = value; }
}
/// <summary>
/// 获取或设置要绘制水印的透明度,注意是原来图片透明度的百分比
/// </summary>
public int LucencyPercent
{
get { return this .lucencyPercent; }
set
{
if (value >= 0 && value <= 100 )
this .lucencyPercent = value;
}
}
/// <summary>
/// 获取或设置要输出图像的路径
/// </summary>
public string OutPath
{
get { return this .outPath; }
set { this .outPath = value; }
}
#endregion
#region "methods"
/// <summary>
/// 开始绘制水印
/// </summary>
public void DrawImage()
{
Image modifyImage = null ;
Image drawedImage = null ;
Graphics g = null ;
try
{
// 建立图形对象
modifyImage = Image.FromFile( this .ModifyImagePath);
drawedImage = Image.FromFile( this .DrawedImagePath);
g = Graphics.FromImage(modifyImage);
// 获取要绘制图形坐标
int x = modifyImage.Width - this .rightSpace;
int y = modifyImage.Height - this .BottoamSpace;
// 设置颜色矩阵
float [][] matrixItems = {
new float [] { 1 , 0 , 0 , 0 , 0 },
new float [] { 0 , 1 , 0 , 0 , 0 },
new float [] { 0 , 0 , 1 , 0 , 0 },
new float [] { 0 , 0 , 0 , ( float ) this .LucencyPercent / 100f, 0 },
new float [] { 0 , 0 , 0 , 0 , 1 }};
ColorMatrix colorMatrix = new ColorMatrix(matrixItems);
ImageAttributes imgAttr = new ImageAttributes();
imgAttr.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
// 绘制阴影图像
g.DrawImage(
drawedImage,
new Rectangle(x, y, drawedImage.Width, drawedImage.Height),
0 , 0 , drawedImage.Width, drawedImage.Height,
GraphicsUnit.Pixel, imgAttr);
// 保存文件
string [] allowImageType = { " .jpg " , " .gif " , " .png " , " .bmp " , " .tiff " , " .wmf " , " .ico " };
FileInfo file = new FileInfo( this .ModifyImagePath);
ImageFormat imageType = ImageFormat.Gif;
switch (file.Extension.ToLower())
{
case " .jpg " :
imageType = ImageFormat.Jpeg;
break ;
case " .gif " :
imageType = ImageFormat.Gif;
break ;
case " .png " :
imageType = ImageFormat.Png;
break ;
case " .bmp " :
imageType = ImageFormat.Bmp;
break ;
case " .tif " :
imageType = ImageFormat.Tiff;
break ;
case " .wmf " :
imageType = ImageFormat.Wmf;
break ;
case " .ico " :
imageType = ImageFormat.Icon;
break ;
default :
break ;
}
MemoryStream ms = new MemoryStream();
modifyImage.Save(ms, imageType);
byte [] imgData = ms.ToArray();
modifyImage.Dispose();
drawedImage.Dispose();
g.Dispose();
FileStream fs = null ;
if ( this .OutPath == null || this .OutPath == "" )
{
File.Delete( this .ModifyImagePath);
fs = new FileStream( this .ModifyImagePath, FileMode.Create, FileAccess.Write);
}
else
{
fs = new FileStream( this .OutPath, FileMode.Create, FileAccess.Write);
}
if (fs != null )
{
fs.Write(imgData, 0 , imgData.Length);
fs.Close();
}
}
finally
{
try
{
drawedImage.Dispose();
modifyImage.Dispose();
g.Dispose();
}
catch { ;}
}
}
#endregion
}
/// 图片修改类,主要是用来保护图片版权的，版权归原作者所有
/// </summary>
public class picmark
{
#region "member fields"
private string modifyImagePath = null ;
private string drawedImagePath = null ;
private int rightSpace;
private int bottoamSpace;
private int lucencyPercent = 70 ;
private string outPath = null ;
#endregion
public picmark()
{
}
#region "propertys"
/// <summary>
/// 获取或设置要修改的图像路径
/// </summary>
public string ModifyImagePath
{
get { return this .modifyImagePath; }
set { this .modifyImagePath = value; }
}
/// <summary>
/// 获取或设置在画的图片路径(水印图片)
/// </summary>
public string DrawedImagePath
{
get { return this .drawedImagePath; }
set { this .drawedImagePath = value; }
}
/// <summary>
/// 获取或设置水印在修改图片中的右边距
/// </summary>
public int RightSpace
{
get { return this .rightSpace; }
set { this .rightSpace = value; }
}
// 获取或设置水印在修改图片中距底部的高度
public int BottoamSpace
{
get { return this .bottoamSpace; }
set { this .bottoamSpace = value; }
}
/// <summary>
/// 获取或设置要绘制水印的透明度,注意是原来图片透明度的百分比
/// </summary>
public int LucencyPercent
{
get { return this .lucencyPercent; }
set
{
if (value >= 0 && value <= 100 )
this .lucencyPercent = value;
}
}
/// <summary>
/// 获取或设置要输出图像的路径
/// </summary>
public string OutPath
{
get { return this .outPath; }
set { this .outPath = value; }
}
#endregion
#region "methods"
/// <summary>
/// 开始绘制水印
/// </summary>
public void DrawImage()
{
Image modifyImage = null ;
Image drawedImage = null ;
Graphics g = null ;
try
{
// 建立图形对象
modifyImage = Image.FromFile( this .ModifyImagePath);
drawedImage = Image.FromFile( this .DrawedImagePath);
g = Graphics.FromImage(modifyImage);
// 获取要绘制图形坐标
int x = modifyImage.Width - this .rightSpace;
int y = modifyImage.Height - this .BottoamSpace;
// 设置颜色矩阵
float [][] matrixItems = {
new float [] { 1 , 0 , 0 , 0 , 0 },
new float [] { 0 , 1 , 0 , 0 , 0 },
new float [] { 0 , 0 , 1 , 0 , 0 },
new float [] { 0 , 0 , 0 , ( float ) this .LucencyPercent / 100f, 0 },
new float [] { 0 , 0 , 0 , 0 , 1 }};
ColorMatrix colorMatrix = new ColorMatrix(matrixItems);
ImageAttributes imgAttr = new ImageAttributes();
imgAttr.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
// 绘制阴影图像
g.DrawImage(
drawedImage,
new Rectangle(x, y, drawedImage.Width, drawedImage.Height),
0 , 0 , drawedImage.Width, drawedImage.Height,
GraphicsUnit.Pixel, imgAttr);
// 保存文件
string [] allowImageType = { " .jpg " , " .gif " , " .png " , " .bmp " , " .tiff " , " .wmf " , " .ico " };
FileInfo file = new FileInfo( this .ModifyImagePath);
ImageFormat imageType = ImageFormat.Gif;
switch (file.Extension.ToLower())
{
case " .jpg " :
imageType = ImageFormat.Jpeg;
break ;
case " .gif " :
imageType = ImageFormat.Gif;
break ;
case " .png " :
imageType = ImageFormat.Png;
break ;
case " .bmp " :
imageType = ImageFormat.Bmp;
break ;
case " .tif " :
imageType = ImageFormat.Tiff;
break ;
case " .wmf " :
imageType = ImageFormat.Wmf;
break ;
case " .ico " :
imageType = ImageFormat.Icon;
break ;
default :
break ;
}
MemoryStream ms = new MemoryStream();
modifyImage.Save(ms, imageType);
byte [] imgData = ms.ToArray();
modifyImage.Dispose();
drawedImage.Dispose();
g.Dispose();
FileStream fs = null ;
if ( this .OutPath == null || this .OutPath == "" )
{
File.Delete( this .ModifyImagePath);
fs = new FileStream( this .ModifyImagePath, FileMode.Create, FileAccess.Write);
}
else
{
fs = new FileStream( this .OutPath, FileMode.Create, FileAccess.Write);
}
if (fs != null )
{
fs.Write(imgData, 0 , imgData.Length);
fs.Close();
}
}
finally
{
try
{
drawedImage.Dispose();
modifyImage.Dispose();
g.Dispose();
}
catch { ;}
}
}
#endregion
}
前台代码如下所示
代码
<%
@ Page Language
=
"
C#
"
AutoEventWireup
=
"
true
"
CodeBehind
=
"
WebForm1.aspx.cs
"
Inherits
=
"
demo.WebForm1
"
%>
<! 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 ></ title >
</ head >
< body >
< form id ="form1" runat ="server" >
< div >
< asp:FileUpload ID ="FileUpload1" runat ="server" />
< br />
< asp:Button ID ="Button1" runat ="server" onclick ="Button1_Click" Text ="Button" />
</ div >
</ form >
</ body >
</ html >
<! 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 ></ title >
</ head >
< body >
< form id ="form1" runat ="server" >
< div >
< asp:FileUpload ID ="FileUpload1" runat ="server" />
< br />
< asp:Button ID ="Button1" runat ="server" onclick ="Button1_Click" Text ="Button" />
</ div >
</ form >
</ body >
</ html >
cs类的代码如下所示
代码
protected
void
Button1_Click(
object
sender, EventArgs e)
{
string extension = Path.GetExtension( this .FileUpload1.FileName).ToUpper();
string fileName = Guid.NewGuid().ToString();
string savePath = Server.MapPath( " ../upfile/ " + fileName + extension);
if ( ! Directory.Exists(Path.GetDirectoryName(savePath)))
{
Directory.CreateDirectory(Path.GetDirectoryName(savePath));
}
this .FileUpload1.SaveAs(savePath);
// 实例化类
picmark wm = new picmark();
wm.DrawedImagePath = Server.MapPath( " /upfile/ " + " backlogo.gif " ) ;
wm.ModifyImagePath = savePath;
wm.RightSpace = 145 ;
wm.BottoamSpace = 17 ;
wm.LucencyPercent = 50 ;
wm.OutPath = Server.MapPath( " /upfile/ " + fileName.Replace( " - " , "" ).ToUpper() + extension);
wm.DrawImage();
// fileName = "_New_" + fileName;
// string sPath = Server.MapPath("../upfile/" + fileName + extension);
// this.FileUpload1.SaveAs(sPath);
// 保存加水印过后的图片,删除原始图片
if (File.Exists(savePath))
{
File.Delete(savePath);
// File.Delete(wm.OutPath);
}
{
string extension = Path.GetExtension( this .FileUpload1.FileName).ToUpper();
string fileName = Guid.NewGuid().ToString();
string savePath = Server.MapPath( " ../upfile/ " + fileName + extension);
if ( ! Directory.Exists(Path.GetDirectoryName(savePath)))
{
Directory.CreateDirectory(Path.GetDirectoryName(savePath));
}
this .FileUpload1.SaveAs(savePath);
// 实例化类
picmark wm = new picmark();
wm.DrawedImagePath = Server.MapPath( " /upfile/ " + " backlogo.gif " ) ;
wm.ModifyImagePath = savePath;
wm.RightSpace = 145 ;
wm.BottoamSpace = 17 ;
wm.LucencyPercent = 50 ;
wm.OutPath = Server.MapPath( " /upfile/ " + fileName.Replace( " - " , "" ).ToUpper() + extension);
wm.DrawImage();
// fileName = "_New_" + fileName;
// string sPath = Server.MapPath("../upfile/" + fileName + extension);
// this.FileUpload1.SaveAs(sPath);
// 保存加水印过后的图片,删除原始图片
if (File.Exists(savePath))
{
File.Delete(savePath);
// File.Delete(wm.OutPath);
}