图片上传的Codebehind(自动生成所略图)
2024-07-21 02:25:15
供稿：网友
using system;
using system.collections;
using system.componentmodel;
using system.configuration;
using system.data;
using system.drawing;
using system.web;
using system.web.sessionstate;
using system.web.ui;
using system.web.ui.webcontrols;
using system.web.ui.htmlcontrols;
using system.text;
using cj168.util;
namespace cj168.web.mag.admins.fedata
{
/// <summary>
/// summary description for fedata.
/// </summary>
public class feuploadpic : system.web.ui.page
{
protected system.web.ui.webcontrols.textbox txtboxpictitle;
protected system.web.ui.webcontrols.calendar calpicdate;
protected system.web.ui.webcontrols.dropdownlist ddlpictype;
protected system.web.ui.webcontrols.textbox txtboxpicintro;
protected system.web.ui.htmlcontrols.htmlinputfile filepicname;
protected system.web.ui.webcontrols.button btnsubmit;
protected system.web.ui.webcontrols.label lblpicinfo;
protected system.web.ui.webcontrols.textbox txtboxpicdate;
protected system.web.ui.webcontrols.requiredfieldvalidator requiredfieldvalidator1;
protected system.web.ui.webcontrols.regularexpressionvalidator vldcatname;
protected system.web.ui.webcontrols.requiredfieldvalidator requiredfieldvalidator2;
protected system.web.ui.webcontrols.customvalidator customvalidator1;
protected system.web.ui.webcontrols.regularexpressionvalidator regularexpressionvalidator1;
protected system.web.ui.webcontrols.hyperlink hlkoripic;
protected system.web.ui.webcontrols.hyperlink hlknewpic;
protected system.web.ui.webcontrols.regularexpressionvalidator regularexpressionvalidator2;
protected system.web.ui.webcontrols.regularexpressionvalidator regularexpressionvalidator3;
protected system.web.ui.webcontrols.checkboxlist checkboxlistrewrite;
private void page_load(object sender, system.eventargs e)
{
// put user code to initialize the page here
//if(page.ispostback)
//txtboxpicdate.text = calpicdate.selecteddate.tostring();
if(!page.ispostback)
{
bind2dropdownlistpictype();
//for(int i = 0;i < request.files.count; i++)
//{
// checkboxlistrewrite.items[i].selected = false;
//}
}
}
public void bind2dropdownlistpictype()
{
cj168.dataaccess.admins admins = new cj168.dataaccess.admins();
dataset ds = admins.fepictypeget();
//ddlpictype.datasource = ;
dataview dv = new dataview(ds.tables["pictype"]);
datarowview drv = dv.addnew();
//datacolumnview dcv = dv.addnew();
drv["title"] = "请选择";
drv["fepictypeid"] = "0";
drv.endedit();
dv.sort = "fepictypeid";
ddlpictype.datasource = dv;
ddlpictype.databind();
}
public void uploadfile(object sender, system.eventargs e)
{
string imgnameonly, imgnamenoext, imgext;
string imgthumbnail;
int erronumber = 0;
system.drawing.image oriimg, newimg;
string strfepicsavepath = configurationsettings.appsettings["fepicsavepath"].tostring();
string strfepicthumbformat = configurationsettings.appsettings["fepicthumbformat"].tostring().tolower();
int intfethumbwidth = int32.parse(configurationsettings.appsettings["fepicthumbwidth"]);
string fileext;
string strpictitle = txtboxpictitle.text;
string strpicintro = txtboxpicintro.text;
string strpicdate = txtboxpicdate.text;
int intpictype = int32.parse(ddlpictype.selecteditem.value);
string strpictype = intpictype.tostring() + "_" + datetime.now.date.toshortdatestring() + "_";
string strfepicwebpath = configurationsettings.appsettings["fepicwebpath"];
cj168.dataaccess.admins admins = new cj168.dataaccess.admins();
//if(admins.fepictypeset(textboxtitle.text,0) < 0)
// lbladdpicinfo.text = "操作失败：已经存在相同名称类型，请修改";
//else
// lbladdpicinfo.text = "操作成功";
stringbuilder picinfo = new stringbuilder();
if(page.isvalid)
{
for(int i = 0;i < request.files.count; i++)
{
httppostedfile postedfile = request.files[i];
fileext = (system.io.path.getextension(postedfile.filename)).tostring().tolower();
//5-test.jpg
imgnameonly = strpictype + system.io.path.getfilename(postedfile.filename);
if(fileext == ".jpg" || fileext == ".gif" || fileext == ".png")
{
if(system.io.file.exists(strfepicsavepath + imgnameonly) && (checkboxlistrewrite.items[i].selected == false))
{
erronumber = erronumber + 1;
picinfo.append("<b>错误：</b>文件("+ (i+1) +") " + imgnameonly + " 已经存在，请修改文件名<br>" );
}
}
else
{
erronumber = erronumber + 1;
if(fileext == "")
picinfo.append("<b>错误：</b>请选择文件<br>" );
else
picinfo.append("<b>错误：</b>文件("+ (i+1) +") " + imgnameonly + " 扩展名 " + fileext + " 不被许可<br>" );
}
}
if(erronumber > 0)
{
picinfo.append("<font color=red>全部操作均未完成，请修改错误，再进行操作</font><br>");
hlkoripic.imageurl = "";
hlkoripic.tooltip = "";
hlknewpic.imageurl = "";
hlknewpic.tooltip = "";
}
else
{
for(int i = 0;i < request.files.count; i++)
{
httppostedfile postedfile = request.files[i];
imgnameonly = strpictype + system.io.path.getfilename(postedfile.filename);
imgnamenoext = system.io.path.getfilenamewithoutextension(postedfile.filename);
imgext = system.io.path.getextension(postedfile.filename).tostring().tolower();
oriimg = system.drawing.image.fromstream(postedfile.inputstream);
newimg = oriimg.getthumbnailimage(intfethumbwidth, intfethumbwidth * oriimg.height/oriimg.width,null,new system.intptr(0));
switch(imgext)
{
//case ".jpeg":
case ".jpg":
oriimg.save(strfepicsavepath + imgnameonly , system.drawing.imaging.imageformat.jpeg);
break;
case ".gif":
oriimg.save(strfepicsavepath + imgnameonly , system.drawing.imaging.imageformat.gif);
break;
case ".png":
oriimg.save(strfepicsavepath + imgnameonly , system.drawing.imaging.imageformat.png);
break;
}
//oriimg.save(configurationsettings.appsettings["fepicsavepath"] + imgnamenoext + ".jpg", system.drawing.imaging.imageformat.jpeg);
switch(strfepicthumbformat)
{
//jpeg format can get the smallest file size, and the png is the largest size
//case "jpeg":
case "jpg":
newimg.save(strfepicsavepath + imgnameonly + "_thumb.jpg",system.drawing.imaging.imageformat.jpeg);
imgthumbnail = imgnameonly + "_thumb.jpg";
break;
case "gif":
newimg.save(strfepicsavepath + imgnameonly + "_thumb.gif",system.drawing.imaging.imageformat.gif);
imgthumbnail = imgnameonly + "_thumb.gif";
break;
case "png":
newimg.save(strfepicsavepath + imgnameonly + "_thumb.png",system.drawing.imaging.imageformat.png);
imgthumbnail = imgnameonly + "_thumb.png";
break;
default:
newimg.save(strfepicsavepath + imgnameonly + "_thumb.jpg",system.drawing.imaging.imageformat.jpeg);
imgthumbnail = imgnameonly + "_thumb.jpg";
break;
}//switch
picinfo.append("<b>文件 名：</b>" + imgnameonly + " ( " + oriimg.width + " x " + oriimg.height + " ) " + postedfile.contentlength/1024 + "kb<br>");
picinfo.append("<b>缩略图名：</b>" + imgthumbnail + " ( " + newimg.width + " x " + newimg.height + " )<br><br>");
hlkoripic.imageurl = strfepicwebpath + imgnameonly;
hlkoripic.tooltip = "◆原图◆/n文件名：" + imgnameonly + "/n尺寸：" + oriimg.width + " x " + oriimg.height + "/n字节：" + postedfile.contentlength/1024 + "kb";
hlknewpic.imageurl = strfepicwebpath + imgthumbnail;
hlknewpic.tooltip = "◆缩略图◆/n文件名：" + imgthumbnail + "/n尺寸：" + newimg.width + " x " + newimg.height;
oriimg.dispose();
newimg.dispose();
picinfo.append("<font color=red>图片上传成功</font><br>");
if(admins.fepicdataset(strpictitle, strpicdate, imgnameonly, intpictype, strpicintro, imgthumbnail,0) < 0)
picinfo.append("<font color=red>保存信息到数据库失败</font><br>");
else
picinfo.append("<font color=red>保存信息到数据库成功</font><br>");
}//for
picinfo.append("<font color=red>所有操作成功</font><br>");
}// if erronumber = 0
}
else
{
picinfo.append("<font color=red>有错误，请检查。操作未成功</font><br>");
hlkoripic.imageurl = "";
hlkoripic.tooltip = "";
hlknewpic.imageurl = "";
hlknewpic.tooltip = "";
}
for(int i = 0;i < request.files.count; i++)
{
checkboxlistrewrite.items[i].selected = false;
}
lblpicinfo.text = picinfo.tostring();
}
public void caldateselected(object sender,system.eventargs e)
{
txtboxpicdate.text = calpicdate.selecteddate.toshortdatestring();
}
public void servervalidatecheckdate(object sender, system.web.ui.webcontrols.servervalidateeventargs value)
{
cj168.util.iutil iutils = new cj168.util.iutil();
if(!iutils.isdate(value.value))
value.isvalid = false;
else
value.isvalid = true;
}
#region web form designer generated code
override protected void oninit(eventargs e)
{
//
// codegen: this call is required by the asp.net web form designer.
//
initializecomponent();
base.oninit(e);
}
/// <summary>
/// required method for designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void initializecomponent()
{
this.load += new system.eventhandler(this.page_load);
}
#endregion
}
}
