方法類:
/// summary>
/// upFileClass 的摘要說明
/// /summary>
public class upFileClass
{
public upFileClass()
{
//
// TODO: 在此處添加構(gòu)造函數(shù)邏輯
//
}
/// summary>
/// 生成縮略圖
/// /summary>
/// param name="originalImagePath">源圖路徑(物理路徑)/param>
/// param name="thumbnailPath">縮略圖路徑(物理路徑)/param>
/// param name="width">縮略圖寬度/param>
/// param name="height">縮略圖高度/param>
/// param name="mode">生成縮略圖的方式/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"://指定高寬縮放(可能變形)
break;
case "W"://指定寬,高按比例
toheight = originalImage.Height * width / originalImage.Width;
break;
case "H"://指定高,寬按比例
towidth = originalImage.Width * height / originalImage.Height;
break;
case "Cut"://指定高寬裁減(不變形)
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;
}
//新建一個(gè)bmp圖片
System.Drawing.Image bitmap = new System.Drawing.Bitmap(towidth, toheight);
//新建一個(gè)畫板
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);
//設(shè)置高質(zhì)量插值法
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
//設(shè)置高質(zhì)量,低速度呈現(xiàn)平滑程度
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
//清空畫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繪制原圖片的指定部分
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格式保存縮略圖
bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg);
}
catch (System.Exception e)
{
throw e;
}
finally
{
originalImage.Dispose();
bitmap.Dispose();
g.Dispose();
}
}
/// summary>
/// 在圖片上增加文字水印
/// /summary>
/// param name="Path">原服務(wù)器圖片路徑/param>
/// param name="Path_sy">生成的帶文字水印的圖片路徑/param>
public static void AddShuiYinWord(string Path, string Path_sy)
{
string addText = "愛智旮旯";
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", 16);
System.Drawing.Brush b = new System.Drawing.SolidBrush(System.Drawing.Color.Blue);
g.DrawString(addText, f, b, 15, 15);
g.Dispose();
image.Save(Path_sy);
image.Dispose();
}
/// summary>
/// 在圖片上生成圖片水印
/// /summary>
/// param name="Path">原服務(wù)器圖片路徑/param>
/// param name="Path_syp">生成的帶圖片水印的圖片路徑/param>
/// param name="Path_sypf">水印圖片路徑/param>
public static void AddShuiYinPic(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();
}
}
!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>asp.net 上傳圖片并作處理 水印 縮略圖/title>
/head>
body>
form id="form1" runat="server">
div>
asp:FileUpload ID="FileUpload1" runat="server" BorderColor="Gray" BorderWidth="1px" />
asp:Button ID="Button1" runat="server" onClick="Button1_Click" Text="上傳" BorderColor="Gray" BorderWidth="1px" Width="70px" />br />
asp:Label ID="Label1" runat="server">/asp:Label>
/div>
/form>
/body>
/html>
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
if (FileUpload1.HasFile)
{
string fileContentType = FileUpload1.PostedFile.ContentType;
if (fileContentType == "image/bmp" || fileContentType == "image/gif" || fileContentType == "image/pjpeg")
{
string name = FileUpload1.PostedFile.FileName; // 客戶端文件路徑
FileInfo file = new FileInfo(name);
string fileName = file.Name; // 文件名稱
string fileName_s = "s_" + file.Name; // 縮略圖文件名稱
string fileName_sy = "sy_" + file.Name; // 水印圖文件名稱(文字)
string fileName_syp = "syp_" + file.Name; // 水印圖文件名稱(圖片)
//以下路徑可以根據(jù)情況進(jìn)行修改
string webFilePath = Server.MapPath("file/" + fileName); // 服務(wù)器端文件路徑
string webFilePath_s = Server.MapPath("file/" + fileName_s); // 服務(wù)器端縮略圖路徑
string webFilePath_sy = Server.MapPath("file/" + fileName_sy); // 服務(wù)器端帶水印圖路徑(文字)
string webFilePath_syp = Server.MapPath("file/" + fileName_syp); // 服務(wù)器端帶水印圖路徑(圖片)
//以下為水印圖片的路徑一定要先準(zhǔn)備一張水印圖片!
string webFilePath_sypf = Server.MapPath("file/shuiyin.jpg"); // 服務(wù)器端水印圖路徑(圖片)
if (!File.Exists(webFilePath))
{
try
{
FileUpload1.SaveAs(webFilePath); // 使用 SaveAs 方法保存文件
upFileClass.AddShuiYinWord(webFilePath, webFilePath_sy);
upFileClass.AddShuiYinPic(webFilePath, webFilePath_syp, webFilePath_sypf);
upFileClass.MakeThumbnail(webFilePath, webFilePath_s, 130, 130, "Cut"); // 生成縮略圖方法
Label1.Text = "提示:文件“" + fileName + "”成功上傳,并生成“" + fileName_s + "”縮略圖,文件類型為:" + FileUpload1.PostedFile.ContentType + ",文件大小為:" + FileUpload1.PostedFile.ContentLength + "B";
}
catch (Exception ex)
{
Label1.Text = "提示:文件上傳失敗,失敗原因:" + ex.Message;
}
}
else
{
Label1.Text = "提示:文件已經(jīng)存在,請(qǐng)重命名后上傳";
}
}
else
{
Label1.Text = "提示:文件類型不符";
}
}
}
}
標(biāo)簽:宣城 西寧 岳陽 紅河 西藏 福州 衢州 湖州
巨人網(wǎng)絡(luò)通訊聲明:本文標(biāo)題《asp.net上傳圖片并作處理水印與縮略圖的實(shí)例代碼》,本文關(guān)鍵詞 asp.net,上傳,圖片,并作,處理,;如發(fā)現(xiàn)本文內(nèi)容存在版權(quán)問題,煩請(qǐng)?zhí)峁┫嚓P(guān)信息告之我們,我們將及時(shí)溝通與處理。本站內(nèi)容系統(tǒng)采集于網(wǎng)絡(luò),涉及言論、版權(quán)與本站無關(guān)。