图片查看器处理程序

来源：互联网发布：瑞合信led软件下载编辑：程序博客网时间：2024/05/20 18:50

图片查看器处理程序是为了对请求的文件夹的内容进行筛选，选择图象并安排表格视图

程序实现分为：

１．从文件夹中检索图片文件，并收集文件信息；

２．将图片文件以设定的格式显示．

using System;

using System.Data;

using System.Configuration;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.Collections;

using System.IO;

/// <summary>

/// imagemaneger 的摘要说明

/// </summary>

//提取文件夹中的图象文件

public class imagemaneger:IHttpHandler

{

public imagemaneger()

{

// TODO: 在此处添加构造函数逻辑

}

//检索文件夹路径.并从文件夹中提取文件

private ArrayList images(string path)

{

string[] imagetype ={ "*.JPG", "*.png", "*.gif", "*.bmp" };

ArrayList image = new ArrayList();

//查询目录

DirectoryInfo di = new DirectoryInfo(path);

foreach (string type in imagetype)

{

FileInfo[] files = di.GetFiles(type);

if (files.Length > 0)

{

image.AddRange(files);

}

return image;

}

//从请求路径中找出检索文件路径

private string changeurlpath(HttpContext context)

{

string path = context.Request.Path;

Char[] pathchar = path.ToCharArray();

for (int i = 0; i < pathchar.Length; i++)

{

if (pathchar[i] == '/')

{

pathchar[i]='/';

}

string nesstrings = new string(pathchar);

int index = nesstrings.IndexOf("pictureview.axd");

string newstring = "D:/mywebtest" + path.Remove(index);

return newstring;

}

//从请求连接读去图片管理信息

private picturinfo floatinfo(HttpContext context)

{

picturinfo pictureinfo = new picturinfo();

string path = changeurlpath(context);

object p1 = context.Request.Params["width"];

object p2 = context.Request.Params["col"];

if (p1 != null)

{

Int32.TryParse((string)p1, out pictureinfo.displaywidth);

}

if (p2 != null)

{

Int32.TryParse((string)p2, out pictureinfo.collcount);

}

pictureinfo.floatname = path;

return pictureinfo;

}

/// <summary>

// 遍历文件夹中的图象文件，将其放在一指定的table中，并将table转化为字符串

/// </summary>

/// <param name="picture"></param>

/// <returns></returns>

string createooutput(picturinfo picture)

{

ArrayList imagearraylist = images(picture.floatname);

Table t = new Table();

int index = 0;

bool moreimage = true;

while (moreimage)

{

TableRow row = new TableRow();

t.Rows.Add(row);

for (int i = 0; i < picture.collcount;i++ )

{

TableCell cell = new TableCell();

row.Cells.Add(cell);

Image image = new Image();

//获取文档案图象的文件信息

FileInfo fi = (FileInfo)imagearraylist[index];

image.Width = Unit.Pixel(picture.displaywidth);

image.ImageUrl =picture.floatname;　

//为没图象加铆

HtmlAnchor a = new HtmlAnchor();

a.HRef = fi.Name;

a.Controls.Add(image);

cell.Controls.Add(a);

index++;

moreimage = (index < imagearraylist.Count);

if (!moreimage)

break;

}

string html=stringunit.controltohtmlstring(t);

return html;

}

IHttpHandler 成员

}

public class picturinfo

{

public int displaywidth;

public int collcount;

public string floatname;

public picturinfo()

{

displaywidth = 200;

collcount = 3;

}

//注册HTTP处理程序

</httpHandlers>