asp.net中上传图片并生成小图片,自动添加水印的代码 .
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asp.net中上传图片并生成小图片,自动添加水印的代码 .
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asp.net中上傳圖片并生成小圖片,自動(dòng)添加水印的代碼
分類: .Net(C#) 2010-03-22 15:28 242人閱讀 評(píng)論(0) 收藏 舉報(bào) /// 上傳圖片生成縮略圖及水印 (來自:http://www.51aspx.com/CV/ImageUpload)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 = "x_" + file.Name; // 縮略圖文件名稱
string fileName_sy = "text_" + file.Name; // 水印圖文件名稱(文字)
string fileName_syp = "water_" + file.Name; // 水印圖文件名稱(圖片)
string webFilePath = Server.MapPath("ImgUpload/" + fileName); // 服務(wù)器端文件路徑
string webFilePath_s = Server.MapPath("ImgUpload/" + fileName_s); // 服務(wù)器端縮略圖路徑
string webFilePath_sy = Server.MapPath("ImgUpload/" + fileName_sy); // 服務(wù)器端帶水印圖路徑(文字)
string webFilePath_syp = Server.MapPath("ImgUpload/" + fileName_syp); // 服務(wù)器端帶水印圖路徑(圖片)
string webFilePath_sypf = Server.MapPath("51aspx.png"); // 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
AddWater(webFilePath, webFilePath_sy);
AddWaterPic(webFilePath, webFilePath_syp, webFilePath_sypf);
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";
}
}
}
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* shuiliner2880
*
* 等級(jí):
發(fā)表于:2008-05-23 09:03:486樓 得分:0
/**/
///
/// 生成縮略圖
///
/// 源圖路徑(物理路徑)
/// 縮略圖路徑(物理路徑)
/// 縮略圖寬度
/// 縮略圖高度
/// 生成縮略圖的方式
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();
}
}
/**/
///
/// 在圖片上增加文字水印
///
/// 原服務(wù)器圖片路徑
/// 生成的帶文字水印的圖片路徑
protected void AddWater(string Path, string Path_sy)
{
string addText = "51aspx.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", 60);
System.Drawing.Brush b = new System.Drawing.SolidBrush(System.Drawing.Color.Green);
g.DrawString(addText, f, b, 35, 35);
g.Dispose();
image.Save(Path_sy);
image.Dispose();
}
/**/
///
/// 在圖片上生成圖片水印
///
/// 原服務(wù)器圖片路徑
/// 生成的帶圖片水印的圖片路徑
/// 水印圖片路徑
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)
{
//自動(dòng)保存遠(yuǎn)程圖片
WebClient client = new WebClient();
//備用Reg:
Regex reg = new Regex("IMG[^>]*?src//s*=//s*(?:/"(? [^/"]*)/" |'(? [^/']*)')", RegexOptions.IgnoreCase);
MatchCollection m = reg.Matches(TextBox1.Text);
foreach (Match math in m)
{
string imgUrl = math.Groups[1].Value;
//在原圖片名稱前加YYMMDD重名名并上傳
Regex regName = new Regex(@"/w+.(?:jpg |gif |bmp |png)", RegexOptions.IgnoreCase);
string strNewImgName = DateTime.Now.ToShortDateString().Replace("-", "") + regName.Match(imgUrl).ToString();
try
{
//保存圖片
client.DownloadFile(imgUrl, Server.MapPath("ImgUpload/Auto/" + strNewImgName));
}
catch
{
}
finally
{
}
client.Dispose();
}
Response.Write(" alert('遠(yuǎn)程圖片保存成功,保存路徑為ImgUpload/auto') ");
}
}
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