本程序主要功能有:
(1)可以根据自己的需要更改上传到服务器上的目录,上传的源图、缩略图、文字水印图和图片水印图分别存入所定目录下的不同目录;
(2)自动检查目录,如无所选择的目录,则自动创建它们;
(3)自行设定生成缩略图的大小;
(4)可以选择是否需要生成文字水印、图片水印,默认为不生成水印图;
(5)可以添加、删除所需上传的图片。
在本程序中均加了相关注释,所以直接发代码,不再多作解释。
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.IO;
using System.Net;
using System.Text.RegularExpressions;
/// 〈summary>
/// FileUpload1.HasFile 如果是true,则表示该控件有文件要上传
/// FileUpload1.FileName 返回要上传文件的名称,不包含路径信息
/// FileUpload1.FileContent 返回一个指向上传文件的流对象
/// FileUpload1.PostedFile 返回已经上传文件的引用
/// FileUpload1.PostedFile.ContentLength 返回上传文件的按字节表示的文件大小
/// FileUpload1.PostedFile.ContentType 返回上传文件的MIME内容类型,也就是文件类型,如返回"image/jpg"
/// FileUpload1.PostedFile.FileName 返回文件在客户端的完全路径(包括文件名全称)
/// FileUpload1.PostedFile.InputStream 返回一个指向上传文件的流对象
/// FileInfo对象表示磁盘或网络位置上的文件。提供文件的路径,就可以创建一个FileInfo对象:
/// 〈/summary>
public partial class BackManagement_ImagesUpload : System.Web.UI.Page
{
public string treePath = "";
public int imageW = 100;
public int imageH = 100;
protected void Page_Load(object sender, EventArgs e)
{
this.Button5.Attributes.Add("Onclick", "window.close();"); //在本地关闭当前页,而不需要发送到服务器去关闭当前页时
if (!Page.IsPostBack)
{
Label2.Text = Server.MapPath("/");
TextBox3.Text = "ImageUpload";
treePath = Server.MapPath("/") + TextBox3.Text.Trim() + "/";
TextBox4.Text = imageW.ToString();
TextBox5.Text = imageH.ToString();
}
}
protected void btnload_Click(object sender, EventArgs e)
{
//如果保存图片的目录不存在,由创建它
treePath = Server.MapPath("/") + TextBox3.Text.Trim() + "/";
imageW = Convert.ToInt32(TextBox4.Text.ToString());
imageH = Convert.ToInt32(TextBox5.Text.ToString());
if (!File.Exists(treePath + "images")) //如果/ImageUpload/images不存在,则创建/ImageUpload/images,用于存放源图片
{
System.IO.Directory.CreateDirectory(treePath + "images");
}
if (!File.Exists(treePath + "thumbnails")) //如果/ImageUpload/thumbnails不存在,则创建/ImageUpload/thumbnails,用于存放缩略图片
{
System.IO.Directory.CreateDirectory(treePath + "thumbnails");
}
if (!File.Exists(treePath + "textImages")) //如果/ImageUpload/textImages不存在,则创建/ImageUpload/textImages,用于存文字水印图片
{
System.IO.Directory.CreateDirectory(treePath + "textImages");
}
if (!File.Exists(treePath + "waterImages")) //如果/ImageUpload/waterImages不存在,则创建/ImageUpload/waterImages,用于存图形水印图片
{
System.IO.Directory.CreateDirectory(treePath + "waterImages");
}
if (FileUpload1.HasFile) //如果是true,则表示该控件有文件要上传
{
string fileContentType = FileUpload1.PostedFile.ContentType;
if (fileContentType == "image/bmp" || fileContentType == "image/gif" || fileContentType == "image/pjpeg")
{
string name = FileUpload1.PostedFile.FileName; //返回文件在客户端的完全路径(包括文件名全称)
FileInfo file = new FileInfo(name); //FileInfo对象表示磁盘或网络位置上的文件。提供文件的路径,就可以创建一个FileInfo对象:
string fileName = file.Name; // 文件名称
string fileName_s = "x_" + file.Name; // 缩略图文件名称
string fileName_sy = "text_" + file.Name; // 水印图文件名称(文字)
string fileName_syp = "water_" + file.Name; // 水印图文件名称(图片)
string webFilePath = treePath + "images/" + fileName; // 服务器端文件路径
string webFilePath_s = treePath + "thumbnails/" + fileName_s; // 服务器端缩略图路径
string webFilePath_sy = treePath + "textImages/" + fileName_sy; // 服务器端带水印图路径(文字)
string webFilePath_syp = treePath + "waterImages/" + fileName_syp; // 服务器端带水印图路径(图片)
string webFilePath_sypf = Server.MapPath("../images/tzwhx.png"); // 服务器端水印图路径(图片)
if (!File.Exists(webFilePath))
{
try
{
FileUpload1.SaveAs(webFilePath); // 使用 SaveAs 方法保存文件
if (CheckBox1.Checked) //是否生成文字水印图
{
AddWater(webFilePath, webFilePath_sy);
}
if (CheckBox2.Checked) //是否生成图形水印图
{
AddWaterPic(webFilePath, webFilePath_syp, webFilePath_sypf);
}
MakeThumbnail(webFilePath, webFilePath_s, imageW, imageH, "Cut"); // 生成缩略图方法
Label1.Text = "提示:文件“" + fileName + "”成功上传,并生成“" + fileName_s + "”缩略图,文件类型为:" + FileUpload1.PostedFile.ContentType + ",文件大小为:" + FileUpload1.PostedFile.ContentLength + "B";
Image1.ImageUrl = "/" + TextBox3.Text.ToString() + "/images/" + fileName;
TextBox1.Text = webFilePath;
TextBox2.Text = "/" + TextBox3.Text.ToString() + "/images/" + fileName;
}
catch (Exception ex)
{
Label1.Text = "提示:文件上传失败,失败原因:" + ex.Message;
}
}
else
{
Label1.Text = "提示:文件已经存在,请重命名后上传";
}
}
else
{
Label1.Text = "提示:文件类型不符";
}
}
}
/**/
/// 〈summary>
/// 生成缩略图
/// 〈/summary>
/// 〈param name="originalImagePath">源图路径(物理路径)〈/param>
/// 〈param name="thumbnailPath">缩略图路径(物理路径)〈/param>
/// 〈param name="width">缩略图宽度〈/param>
/// 〈param name="height">缩略图高度〈/param>
/// 〈param name="mode">生成缩略图的方式〈/param>
public static void MakeThumbnail(string originalImagePath, string thumbnailPath, int width, int height, string mode)
{
System.Drawing.Image originalImage = System.Drawing.Image.FromFile(originalImagePath);
int towidth = width;
int toheight = height;
int x = 0;
int y = 0;
int ow = originalImage.Width;
int oh = originalImage.Height;
switch (mode)
{
case "HW"://指定高宽缩放(可能变形)
break;
case "W"://指定宽,高按比例
toheight = originalImage.Height * width / originalImage.Width;
break;
case "H"://指定高,宽按比例
towidth = originalImage.Width * height / originalImage.Height;
break;
case "Cut"://指定高宽裁减(不变形)
if ((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight)
{
oh = originalImage.Height;
ow = originalImage.Height * towidth / toheight;
y = 0;
x = (originalImage.Width - ow) / 2;
}
else
{
ow = originalImage.Width;
oh = originalImage.Width * height / towidth;
x = 0;
y = (originalImage.Height - oh) / 2;
}
break;
default:
break;
}
//新建一个bmp图片
System.Drawing.Image bitmap = new System.Drawing.Bitmap(towidth, toheight);
//新建一个画板
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);
//设置高质量插值法
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
//设置高质量,低速度呈现平滑程度
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
//清空画布并以透明背景色填充
g.Clear(System.Drawing.Color.Transparent);
//在指定位置并且按指定大小绘制原图片的指定部分
g.DrawImage(originalImage, new System.Drawing.Rectangle(0, 0, towidth, toheight),
new System.Drawing.Rectangle(x, y, ow, oh),
System.Drawing.GraphicsUnit.Pixel);
try
{
//以jpg格式保存缩略图
bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg);
}
catch (System.Exception e)
{
throw e;
}
finally
{
originalImage.Dispose();
bitmap.Dispose();
g.Dispose();
}
}
/**/
/// 〈summary>
/// 在图片上增加文字水印
/// 〈/summary>
/// 〈param name="Path">原服务器图片路径〈/param>
/// 〈param name="Path_sy">生成的带文字水印的图片路径〈/param>
protected void AddWater(string Path, string Path_sy)
{
string addText = "http://www.tzwhx.com/";
System.Drawing.Image image = System.Drawing.Image.FromFile(Path);
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(image);
g.DrawImage(image, 0, 0, image.Width, image.Height);
System.Drawing.Font f = new System.Drawing.Font("Verdana", 10); //字体位置为左空10
System.Drawing.Brush b = new System.Drawing.SolidBrush(System.Drawing.Color.Green);
g.DrawString(addText, f, b, 14, 14); //字体大小为14X14
g.Dispose();
image.Save(Path_sy);
image.Dispose();
}
/**/
/// 〈summary>
/// 在图片上生成图片水印
/// 〈/summary>
/// 〈param name="Path">原服务器图片路径〈/param>
/// 〈param name="Path_syp">生成的带图片水印的图片路径〈/param>
/// 〈param name="Path_sypf">水印图片路径〈/param>
protected void AddWaterPic(string Path, string Path_syp, string Path_sypf)
{
System.Drawing.Image image = System.Drawing.Image.FromFile(Path);
System.Drawing.Image copyImage = System.Drawing.Image.FromFile(Path_sypf);
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(image);
g.DrawImage(copyImage, new System.Drawing.Rectangle(image.Width - copyImage.Width, image.Height - copyImage.Height, copyImage.Width, copyImage.Height), 0, 0, copyImage.Width, copyImage.Height, System.Drawing.GraphicsUnit.Pixel);
g.Dispose();
image.Save(Path_syp);
image.Dispose();
}
protected void Button2_Click(object sender, EventArgs e)
{
//自动保存远程图片
WebClient client = new WebClient();
//备用Reg:〈img.*?src=([\"\'])(http:\/\/.+\.(jpg|gif|bmp|bnp))\1.*?>
Regex reg = new Regex("IMG[^>]*?src\\s*=\\s*(?:\"(?〈1>[^\"]*)\"|'(?〈1>[^\']*)')", RegexOptions.IgnoreCase);
MatchCollection m = reg.Matches(TextBox1.Text);
foreach (Match math in m)
{
string imgUrl = math.Groups[1].Value;
//在原图片名称前加YYMMDD重名名并上传
Regex regName = new Regex(@"\w+.(?:jpg|gif|bmp|png)", RegexOptions.IgnoreCase);
string strNewImgName = DateTime.Now.ToShortDateString().Replace("-", "") + regName.Match(imgUrl).ToString();
try
{
//保存图片
//client.DownloadFile(imgUrl, Server.MapPath("../ImageUpload/Auto/" + strNewImgName));
}
catch
{
}
finally
{
}
client.Dispose();
}
Response.Write("〈script>alert('远程图片保存成功,保存路径为ImageUpload/auto')〈/script>");
}
}
〈%@ Page Language="C#" AutoEventWireup="true" CodeFile="ImagesAutoUpload.aspx.cs" Inherits="BackManagement_ImagesAutoUpload" %>
〈!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 id="Head1" runat="server">
〈title>自动上传图片并加文字水印〈/title>
〈/head>
〈body>
〈form id="form1" runat="server" method="post" enctype="multipart/form-data">
〈label for="pagebody1" style="display: none">
〈/label>
〈fieldset id="container">
〈legend>上传图片并加文字水印〈/legend>
〈div class="window" style="list-style: none;">
〈div style="padding: 0px; width: 808px; height: 200px; float: left; margin-right: 0px;">
〈ul>
〈li style="width: 150px; margin: 0px; padding: 0px; float: left;">
〈asp:Image ID="Image1" runat="server" Height="200px" BorderWidth="2px" Width="150px"
ImageUrl="~/images/Jpg/135X67/0_11_16.gif" />
〈/li>
〈li style="width: 250px; margin: 0px;">
〈asp:ListBox ID="FileList" runat="server" Width="250px" Height="200px">〈/asp:ListBox>
〈/li>
〈li style="width: 400px; margin: 0px; float: right;">
(1)图片将保存在你网站根目录〈asp:TextBox ID="TextBox3" runat="server">〈/asp:TextBox>中,你可以修改它,但建议你使用默认目录。〈br />
(2)上传图片保存在所建目录的子目录 /images下;缩略图在 /thumbnails下;文字水印图在 /textImages下;图形水印图在 /waterImages目录下。〈br />
(3)生成的缩略图的默认宽度和高度均为100px,你也可以修改它们,宽为: 〈asp:TextBox ID="TextBox4" runat="server" Width="54px">〈/asp:TextBox>高为:〈asp:TextBox
ID="TextBox5" runat="server" Width="56px">〈/asp:TextBox>〈br />
〈asp:CheckBox ID="CheckBox1" runat="server" Text="文字水印" />
〈asp:CheckBox ID="CheckBox2" runat="server" Text="图形水印" />
你可以选择是否生成水印图,默认不生成。 〈/li>
〈/ul>
〈/div>
〈/div>
〈div>
〈asp:FileUpload ID="FindFile" runat="server" Width="529px" />
〈/div>
〈div>
〈asp:TextBox ID="TipInfo" runat="server" Width="400px">〈/asp:TextBox>
〈asp:TextBox ID="TextBox1" runat="server" Width="400px">〈/asp:TextBox>
〈/div>
〈div>
〈asp:Button ID="Upload" runat="server" Text="上 传" Style="height: 26px" OnClick="Upload_Click" />
〈asp:Button ID="AddFile" runat="server" Text="添 加" OnClick="AddFile_Click1" />
〈asp:Button ID="AddAllFile" runat="server" Text="全部添加" OnClick="AddAllFile_Click"
Enabled="False" />
〈asp:Button ID="DelFile" runat="server" Text="删 除" OnClick="DelFile_Click1" />
〈asp:Button ID="btnExit" runat="server" Text="完 成" />
〈/div>
〈div>
〈/div>
〈/fieldset>
〈/form>
〈/body>
〈/html>
另外,为解决大文件上传的限制,你必须在Web.config中加入以下代码。
< system.web>
< httpRuntime executionTimeout="90" maxRequestLength="20000" useFullyQualifiedRedirectUrl="false" requestLengthDiskThreshold="8192"/>
< /system.web>