如何遍历文件夹里的图片,,然后给这些图片打水印呢

Question

如何遍历文件夹里的图片,,然后给这些图片打水印呢
遍历文件夹里的图片,是用什么方法
谢谢了

Answer 1

system.io判断文件扩展名然后打开图片,在上面画图

Answer 2

缩略图水印组件wsImage3.5 批量加就可以

Answer 3

string extension = Path.GetExtension(File1.PostedFile.FileName).ToUpper(); 
string fileName = DateTime.Now.ToString("yyyyMMddhhmmss"); string path = Server.MapPath(".") + "/upload/" + fileName + extension; 
File1.PostedFile.SaveAs(path); 
System.Drawing.Image image = System.Drawing.Image.FromFile(path);
System.Drawing.Image copyImage = System.Drawing.Image.FromFile( Server.MapPath(".") + "/logo.gif"); 
//Create a new FrameDimension object from this imageFrameDimension ImgFrmDim = new FrameDimension( image.FrameDimensionsList[0] );int nFrameCount = image.GetFrameCount( ImgFrmDim );// Save every frame into jpeg format for( int i = 0; i < nFrameCount; i++ )
{
image.SelectActiveFrame( ImgFrmDim, i );image.Save( string.Format( Server.MapPath(".") + "/upload/Frame{0}.jpg", i ), ImageFormat.Jpeg );
}
image.Dispose();for( int i = 0; i < nFrameCount; i++ )
{
string pa = Server.MapPath(".") + "/upload/Frame"+i+".jpg";
System.Drawing.Image Image = System.Drawing.Image.FromFile(pa);
Graphics g = Graphics.FromImage(Image); 
g.DrawImage(copyImage, new Rectangle(Image.Width-copyImage.Width, Image.Height-copyImage.Height,  copyImage.Width, copyImage.Height), 0, 0, copyImage.Width, copyImage.Height, GraphicsUnit.Pixel); 
g.Dispose(); string newPath = Server.MapPath(".") + "/upload/" + fileName + "_new"+i.ToString()+ extension;
Image.Save(newPath);Image.Dispose();if(File.Exists(pa))
{ 
File.Delete(pa);
} }
if(File.Exists(path)) 
{ 
File.Delete(path); 
}

Answer 4

.net 可以直接弄。。不用组件。

Answer 5

下面是遍历文件夹的代码 private void Page_Load(object sender, System.EventArgs e)
    {
        if (Session["UserName"] == null)
        {
            Response.Redirect("login.aspx");
        }
        DelFile();
        // 在此处放置用户代码以初始化页面
        string strdirlist = Request.QueryString.Get("dir");
        string FileList,ImgFilePath,SysPath;
        SysPath = "文件夹的虚拟路径";
        if (strdirlist == null) 
        {
            strdirlist = Server.MapPath(Application["UpLoadFilePath"].ToString());
        }
        ImgFilePath = strdirlist.Replace(SysPath, "../");
        DirectoryInfo directory = null;
        try
        {
            directory = new DirectoryInfo(strdirlist);
            //读取目录属性
            FileList = ("<p>Creation:" + directory.CreationTime.ToString() + "</p>");
            if (!(strdirlist == null || strdirlist == Server.MapPath(Application["UpLoadFilePath"].ToString())))
            {
                FileList = FileList + "<ul><li><a href=\"javascript:history.go(-1);\">...</a></li></ul>";
            }
            
            DirectoryInfo[] subDirectory = directory.GetDirectories();
            FileList = FileList + "<ul>\n";
            for (int i = 0; i < subDirectory.Length; i++)
            {
                FileList = FileList + "<li>";
                FileList = FileList + "<a href=\"FileList.aspx?dir=" + strdirlist + "&IsFile=false \">×</a>&nbsp;";
                FileList = FileList + "<a href=\"FileList.aspx?dir=" + Server.UrlEncode(subDirectory[i].FullName) + "\">" + subDirectory[i].Name;
                FileList = FileList + "</a></li>\n";
            }
            FileList = FileList + "</ul>\n";
            FileInfo[] theFiles = directory.GetFiles();//可以使用GetFiles("*.txt")进行文件搜索
            FileList = FileList + "<ul>\n";
            for (int i = 0; i < theFiles.Length; i++)
            {
                FileList = FileList + "<li>";
                FileList = FileList + "<a href=\"#\"onclick=\"javascript:if  (confirm('你确定删除吗?'))  href='FileList.aspx?dir=" + strdirlist + "&IsFile=ok&DelFile=" + ImgFilePath + "/" + theFiles[i].Name + " ';else  return; \">×</a>&nbsp;";
                FileList = FileList + " <a href=\" " + ImgFilePath + "/" + theFiles[i].Name + " \" target=\"_blank\">" + theFiles[i].Name + "</a>&nbsp;&nbsp;&nbsp;&nbsp;<span style='color: #999999'>" + theFiles[i].Length.ToString() + "&nbsp;Byte&nbsp;&nbsp;&nbsp;&nbsp;" + theFiles[i].LastWriteTimeUtc.ToString() + "</span></li>\n";
                
            }
            FileList = FileList + "</ul>\n";
            FileDir.Text = FileList;
        }
        catch (Exception ex)
        {
            Response.Write("Access not possible. error:<i>");
            Response.Write(e.ToString() + "</i>");
            Response.End();
        }
    }
    private void DelFile() 
    {
        string DelImgUrl = Request.QueryString["DelFile"];
        DelImgUrl = Server.MapPath(DelImgUrl);
        if (Request.QueryString["IsFile"] == "ok") 
        {
            if (File.Exists(DelImgUrl))
            {
                File.Delete(DelImgUrl);
            }
            Response.Write(Request.QueryString["DelFile"]);
        }
        if (Request.QueryString["IsFile"] == "false")
        {
            Response.Write(Request.QueryString["dir"]);
        }
    
    }

Answer 6

/**//// <summary>
            /// 添加图片水印
            /// </summary>
            /// <param name="oldpath">原图片绝对地址</param>
            /// <param name="newpath">新图片放置的绝对地址</param>
        private void addWaterMark(string oldpath,string newpath)
        
        {
            try
            {                System.Drawing.Image image = System.Drawing.Image.FromFile(oldpath);                Bitmap b = new Bitmap(image.Width, image.Height,PixelFormat.Format24bppRgb);
                Graphics g = Graphics.FromImage(b);
                g.Clear(Color.White);
                g.SmoothingMode = SmoothingMode.HighQuality;
                g.InterpolationMode = InterpolationMode.High;
            
                g.DrawImage(image, 0, 0, image.Width, image.Height);                if(如果需要填加水印)
                {
                    switch(水印类型)
                    {
    //是图片的话               
                                   case "WM_IMAGE":
                            this.addWaterImage( g,Page.Server.MapPath(Waterimgpath),WaterPosition,image.Width,image.Height);
                            break;
    //如果是文字                    
                                   case "WM_TEXT":
                            this.addWaterText( g, WaterText,WaterPosition
                                ,image.Width,image.Height);
                            break;
                    }                    b.Save(newpath);
                    b.Dispose();
                    image.Dispose();
                }            }
            catch
            {
            
                if(File.Exists(oldpath))
                {
                    File.Delete(oldpath);
                }
            }
            finally
            {
                
                if(File.Exists(oldpath))
                {
                    File.Delete(oldpath);
                }
            
            
            }
        
                
        }

Answer 7

前期写了一个代码网站水印工具 。http://download.csdn.net/source/161135
估计能符合你的要求