一个生成不重复随机数的方法
//生成不重复随机数算法
privateintGetRandomNum(inti,intlength,intup,intdown)
{
intiFirst=0;
Randomro=newRandom(i*length*unchecked((int)DateTime.Now.Ticks));
iFirst=ro.Next(up,down);
returniFirst;
}
发表于@2005年12月30日3:44PM|评论(0)
ASP.NET多文件上传方法
前台代码
<scriptlanguage="Javascript">
functionaddFile()
{
varstr='<INPUTtype="file"size="30"NAME="File"><br>'
document.getElementById('MyFile').insertAdjacentHTML("beforeEnd",str)
}
</script>
<formid="form1"method="post"runat="server"enctype="multipart/form-data">
<divalign="center">
<h3>多文件上传</h3>
<Pid="MyFile"><INPUTtype="file"size="30"NAME="File"><br></P>
<P>
<inputtype="button"value="增加(Add)"onclick="addFile()"><inputonclick="this.form.reset()"type="button"value="重置(ReSet)">
<asp:ButtonRunat="server"Text="开始上传"ID="UploadButton">
</asp:Button>
</P>
<P>
<asp:Labelid="strStatus"runat="server"Font-Names="宋体"Font-Bold="True"Font-Size="9pt"Width="500px"
BorderBorderColor="White"></asp:Label>
</P>
</div>
</form>
后台代码
protectedSystem.Web.UI.WebControls.ButtonUploadButton;
protectedSystem.Web.UI.WebControls.LabelstrStatus;
privatevoidPage_Load(objectsender,System.EventArgse)
{
///在此处放置用户代码以初始化页面
if(this.IsPostBack)this.SaveImages();
}
privateBooleanSaveImages()
{
///'遍历File表单元素
HttpFileCollectionfiles=HttpContext.Current.Request.Files;
///'状态信息
System.Text.StringBuilderstrMsg=newSystem.Text.StringBuilder();
strMsg.Append("上传的文件分别是：<hrcolor=red>");
try
{
for(intiFile=0;iFile<files.Count;iFile++)
{
///'检查文件扩展名字
HttpPostedFilepostedFile=files[iFile];
stringfileName,fileExtension,file_id;
//取出精确到毫秒的时间做文件的名称
intyear=System.DateTime.Now.Year;
intmonth=System.DateTime.Now.Month;
intday=System.DateTime.Now.Day;
inthour=System.DateTime.Now.Hour;
intminute=System.DateTime.Now.Minute;
intsecond=System.DateTime.Now.Second;
intmillisecond=System.DateTime.Now.Millisecond;
stringmy_file_id=year.ToString()+month.ToString()+day.ToString()+hour.ToString()+minute.ToString()+second.ToString()+millisecond.ToString()+iFile.ToString();
fileName=System.IO.Path.GetFileName(postedFile.FileName);
fileExtension=System.IO.Path.GetExtension(fileName);
file_id=my_file_id+fileExtension;
if(fileName!="")
{
fileExtension=System.IO.Path.GetExtension(fileName);
strMsg.Append("上传的文件类型："+postedFile.ContentType.ToString()+"<br>");
strMsg.Append("客户端文件地址："+postedFile.FileName+"<br>");
strMsg.Append("上传文件的文件名："+file_id+"<br>");
strMsg.Append("上传文件的扩展名："+fileExtension+"<br><hr>");
postedFile.SaveAs(System.Web.HttpContext.Current.Request.MapPath("images/")+file_id);
}
}
strStatus.Text=strMsg.ToString();
returntrue;
}
catch(System.ExceptionEx)
{
strStatus.Text=Ex.Message;
returnfalse;
}
}
发表于@2005年12月30日3:37PM|评论(0)
邮件系统使用的上传附件方法
前台HTML代码
<formid="mail"method="post"runat="server">
<tableborder="0"cellpadding="0"cellspacing="0"bordercolor="#111111"
width="39%"id="AutoNumber1"height="75">
<tr>
<tdwidth="100%"height="37"><INPUTid="myFile"type="file"size="30"name="myFile"
runat="server">
<asp:buttonid="Upload"runat="server"Text="上传附件"></asp:button></td>
</tr>
<tr>
<tdwidth="100%"height="38">
共计
<asp:textboxid="P_size"runat="server"Width="65px"></asp:textbox>KB
<asp:dropdownlistid="dlistBound"runat="server"></asp:dropdownlist>
<asp:buttonid="btnDel"runat="server"Text="删除附件"></asp:button></td>
</tr>
</table>
</form>
后台CS代码
publicclassUpload_Mail:System.Web.UI.Page
{
protectedSystem.Web.UI.WebControls.ButtonUpload;
protectedSystem.Web.UI.WebControls.DropDownListdlistBound;
protectedSystem.Web.UI.WebControls.TextBoxP_size;
protectedSystem.Web.UI.WebControls.ButtonbtnDel;
protectedSystem.Web.UI.HtmlControls.HtmlInputFilemyFile;
privatevoidPage_Load(objectsender,System.EventArgse)
{
if(!IsPostBack)
{
//没有附件的状态
dlistBound.Items.Clear();
ArrayListarr=newArrayList();
arr.Add("--没有附件--");
dlistBound.DataSource=arr;
dlistBound.DataBind();
P_size.Text="0";
}
}
privatevoidUpload_Click(objectsender,System.EventArgse)
{
if(myFile.PostedFile!=null)
{
HttpFileCollectionfiles=HttpContext.Current.Request.Files;
HttpPostedFilepostedFile=files[0];
stringfileName=System.IO.Path.GetFileName(postedFile.FileName);
stringpath=Request.PhysicalApplicationPath+@"UploadMail"+fileName;
postedFile.SaveAs(path);
//数组对上存附件进行实时绑定
if((string)Session["udMail"]==null)
{
Session["udMail"]=fileName;
}
else
{
Session["udMail"]=(string)Session["udMail"]+"|"+fileName;
}
string[]udMail=Session["udMail"].ToString().Split('|');
ArrayListlist=newArrayList(udMail);
list.Reverse();
udMail=(string[])list.ToArray(typeof(string));
dlistBound.Items.Clear();
longdirsize=0;
for(inti=0;i<udMail.Length;i++)
{
stringIndexItem=udMail[i];
stringVauleItem=Request.PhysicalApplicationPath+@"UploadMail"+udMail[i];
dlistBound.Items.Add(newListItem(IndexItem,VauleItem));
System.IO.FileInfomysize=newSystem.IO.FileInfo(@VauleItem);
dirsize+=System.Convert.ToInt32(mysize.Length/1024)+1;
}
P_size.Text=dirsize.ToString();
}
}
privatevoidbtnDel_Click(objectsender,System.EventArgse)
{
stringtrueDelfile=dlistBound.SelectedValue.ToString();
stringDelfile=dlistBound.SelectedItem.ToString();
usageIO.DeletePath(trueDelfile);
if(Session["udMail"]!=null)
{
intindex=Session["udMail"].ToString().IndexOf("|");
if(index==-1)
{
Session["udMail"]=null;
dlistBound.Items.Clear();
dlistBound.Items.Add("--没有附件--");
P_size.Text="0";
}
else
{
string[]udMail=Session["udMail"].ToString().Split('|');
ArrayListvalues=newArrayList(udMail);
values.Remove(Delfile);
strings=null;
for(inti=0;i<values.Count;i++)
{
if(values.Count!=0)
{
s+=values[i].ToString()+"|";
}
}
if(s!=""||s!=null)
{
s=s.TrimEnd('|');
}
Session["udMail"]=s;
string[]uMail=Session["udMail"].ToString().Split('|');
ArrayListlist=newArrayList(uMail);
list.Reverse();
uMail=(string[])list.ToArray(typeof(string));
dlistBound.Items.Clear();
longdirsize=0;
for(inti=0;i<uMail.Length;i++)
{
stringIndexItem=uMail[i];
stringVauleItem=Request.PhysicalApplicationPath+@"UploadMail"+uMail[i];
dlistBound.Items.Add(newListItem(IndexItem,VauleItem));
System.IO.FileInfomysize=newSystem.IO.FileInfo(@VauleItem);
dirsize+=System.Convert.ToInt32(mysize.Length/1024)+1;
}
P_size.Text=dirsize.ToString();
}
}
}
Web窗体设计器生成的代码#regionWeb窗体设计器生成的代码
overrideprotectedvoidOnInit(EventArgse)
{
//
//CODEGEN:该调用是ASP.NETWeb窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
/**////<summary>
///设计器支持所需的方法-不要使用代码编辑器修改
///此方法的内容。
///</summary>
privatevoidInitializeComponent()
{
this.Upload.Click+=newSystem.EventHandler(this.Upload_Click);
this.btnDel.Click+=newSystem.EventHandler(this.btnDel_Click);
this.Load+=newSystem.EventHandler(this.Page_Load);
}
#endregion
}
发表于@2005年12月30日3:29PM|评论(0)
上传图片并且生成可以控制大小图片清晰度的方法
privatevoidUpload_Click(objectsender,System.EventArgse)
{
if(myFile.PostedFile!=null)
{
//检查文件扩展名字
HttpFileCollectionfiles=HttpContext.Current.Request.Files;
HttpPostedFilepostedFile=files[0];
stringfileName,fileExtension,file_id,file_path;
//取出精确到毫秒的时间做文件的名称
intyear=System.DateTime.Now.Year;
intmonth=System.DateTime.Now.Month;
intday=System.DateTime.Now.Day;
inthour=System.DateTime.Now.Hour;
intminute=System.DateTime.Now.Minute;
intsecond=System.DateTime.Now.Second;
intmillisecond=System.DateTime.Now.Millisecond;
stringmy_file_id=year.ToString()+month.ToString()+day.ToString()+hour.ToString()+minute.ToString()+second.ToString()+millisecond.ToString();
//获得文件类型
fileName=System.IO.Path.GetFileName(postedFile.FileName);
fileExtension=System.IO.Path.GetExtension(fileName);
//重新命名文件，防止重复
file_id="topnews_"+my_file_id+fileExtension;
file_path="images/article_images/"+file_id;
//文件上传到服务器的根目录
postedFile.SaveAs(Request.PhysicalApplicationPath+@"imagesarticle_images"+file_id);
//处理图片大小
intwidth,height,level;
width=120;
height=90;
level=100;//从1-100
GetThumbnailImage(width,height,level,file_id);
}
}
//生成缩略图函数
publicvoidGetThumbnailImage(intwidth,intheight,intlevel,stringfile_id)
{
stringnewfile=Request.PhysicalApplicationPath+"images/article_images/"+"top_"+file_id;
System.Drawing.Imageoldimage=System.Drawing.Image.FromFile(Request.PhysicalApplicationPath+"images/article_images/"+file_id);
System.Drawing.ImagethumbnailImage=oldimage.GetThumbnailImage(width,height,newSystem.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback),IntPtr.Zero);
Bitmapoutput=newBitmap(thumbnailImage);
//处理JPG质量的函数
ImageCodecInfo[]codecs=ImageCodecInfo.GetImageEncoders();
ImageCodecInfoici=null;
foreach(ImageCodecInfocodecincodecs){if(codec.MimeType=="image/jpeg")ici=codec;}
EncoderParametersep=newEncoderParameters();
ep.Param[0]=newEncoderParameter(Encoder.Quality,(long)level);
output.Save(newfile,ici,ep);
//释放所有使用对象
ep.Dispose();
output.Dispose();
oldimage.Dispose();
thumbnailImage.Dispose();
//删除源图片
stringfile_path="images/article_images/"+"top_"+file_id;
usageIO.DeletePath(Request.PhysicalApplicationPath+"images/article_images/"+file_id);
Response.Write("<script>parent.Form1.A_Simg.value='"+file_path+"';location.replace('Upload_Img.aspx')</script>");
}
boolThumbnailCallback()
{
returnfalse;
}
发表于@2005年12月30日3:25PM|评论(0)
生成高清晰度的缩略图[方法1]
publicvoidpic_zero(stringsourcepath,stringaimpath,intscale)
{
stringoriginalFilename=sourcepath;
//生成的高质量图片名称
stringstrGoodFile=aimpath;
//从文件取得图片对象
System.Drawing.Imageimage=System.Drawing.Image.FromFile(originalFilename);
intiImgWidth=image.Width;
intiImgHeight=image.Height;
intiScale=(iImgWidth/scale)>(iImgHeight/scale)?(iImgWidth/scale):(iImgHeight/scale);
//取得图片大小
System.Drawing.Sizesize=newSize(image.Width/iScale,image.Height/iScale);
//新建一个bmp图片
System.Drawing.Imagebitmap=newSystem.Drawing.Bitmap(size.Width,size.Height);
//新建一个画板
System.Drawing.Graphicsg=System.Drawing.Graphics.FromImage(bitmap);
//设置高质量插值法
g.InterpolationMode=System.Drawing.Drawing2D.InterpolationMode.High;
//设置高质量,低速度呈现平滑程度
g.SmoothingMode=System.Drawing.Drawing2D.SmoothingMode.HighQuality;
//清空一下画布
g.Clear(Color.Blue);
//在指定位置画图
g.DrawImage(image,newSystem.Drawing.Rectangle(0,0,bitmap.Width,bitmap.Height),
newSystem.Drawing.Rectangle(0,0,image.Width,image.Height),
System.Drawing.GraphicsUnit.Pixel);
//保存高清晰度的缩略图
bitmap.Save(strGoodFile,System.Drawing.Imaging.ImageFormat.Jpeg);
g.Dispose();
}
发表于@2005年12月30日3:23PM|评论(0)
比较完美的图片验证码
需要引用的名字空间
usingSystem.IO;
usingSystem.Drawing.Imaging;
usingSystem.Drawing.Drawing2D;
publicclassValidationCodeImg:System.Web.UI.Page
{
privatevoidPage_Load(objectsender,System.EventArgse)
{
this.CreateCheckCodeImage(GenerateCheckCode());
}
privatestringGenerateCheckCode()
{
intnumber;
charcode;
stringcheckCode=String.Empty;
System.Randomrandom=newRandom();
for(inti=0;i<5;i++)
{
number=random.Next();
if(number%2==0)
code=(char)('0'+(char)(number%10));
else
code=(char)('0'+(char)(number%10));
checkCode+=code.ToString();
}
Response.Cookies.Add(newHttpCookie("CheckCode",checkCode));
returncheckCode;
}
privatevoidCreateCheckCodeImage(stringcheckCode)
{
if(checkCode==null||checkCode.Trim()==String.Empty)
return;
System.Drawing.Bitmapimage=newSystem.Drawing.Bitmap((int)Math.Ceiling((checkCode.Length*12.5)),24);
Graphicsg=Graphics.FromImage(image);
try
{
//生成随机生成器
Randomrandom=newRandom();
//清空图片背景色
g.Clear(Color.White);
//画图片的背景噪音线
for(inti=0;i<2;i++)
{
intx1=random.Next(image.Width);
intx2=random.Next(image.Width);
inty1=random.Next(image.Height);
inty2=random.Next(image.Height);
g.DrawLine(newPen(Color.Silver),x1,y1,x2,y2);
}
Fontfont=newSystem.Drawing.Font("Tahoma",12,(System.Drawing.FontStyle.Bold|System.Drawing.FontStyle.Italic));
System.Drawing.Drawing2D.LinearGradientBrushbrush=newSystem.Drawing.Drawing2D.LinearGradientBrush(newRectangle(0,0,image.Width,image.Height),Color.Black,Color.Black,1.2f,true);
g.DrawString(checkCode,font,brush,2,2);
//画图片的前景噪音点
for(inti=0;i<100;i++)
{
intx=random.Next(image.Width);
inty=random.Next(image.Height);
image.SetPixel(x,y,Color.FromArgb(random.Next()));
}
//画图片的边框线
g.DrawRectangle(newPen(Color.Silver),0,0,image.Width-1,image.Height-1);
System.IO.MemoryStreamms=newSystem.IO.MemoryStream();
image.Save(ms,System.Drawing.Imaging.ImageFormat.Gif);
Response.ClearContent();
Response.ContentType="image/Gif";
Response.BinaryWrite(ms.ToArray());
}
finally
{
g.Dispose();
image.Dispose();
}
}
发表于@2005年12月30日3:09PM|评论(0)
IE订单的打印处理办法
在一个商城项目应用中我需要把客户在网上下的订单使用IE打印出来
首先必须控制订单不能出现IE的页眉页脚（需要使用ScriptX）
<OBJECTid="factory"codeBase="http://www.meadroid.com/scriptx/ScriptX.cab#Version=5,60,0,360"
classid="clsid:1663ed61-23eb-11d2-b92f-008048fdd814"viewastext>
</OBJECT>
<SCRIPTdefer>
functionprintln(){
factory.printing.header=""
factory.printing.footer=""
factory.printing.Print(true)
factory.printing.leftMargin=0.2
factory.printing.topMargin=0.5
factory.printing.rightMargin=0.2
factory.printing.bottomMargin=1.5
window.print();
}
</SCRIPT>
然后主要是控制订单数据输出用什么办法显示出来，为了灵活的控制输出效果，我这里使用的是循环读入数据（定购的商品）的办法(下面的代码是我使用的)
publicstringmyOrder(stringB_No)
{
doData.conn.Open();
stringstrFirstMenu=null;
stringstrSql="selectItems_Type,Items_Name,Items_Unit,Items_Count,Items_Pricefrom[OrderItems]whereOrder_No='"+B_No+"'orderbyIDdesc";
SqlDataAdapterda=newSqlDataAdapter(strSql,doData.conn);
DataSetds=newDataSet();
da.Fill(ds,"myOrder");
intcount=ds.Tables[0].Rows.Count;
stringItems_Type,Items_Name,Items_Price,Items_Count,Items_Unit,Items_TotalPrice;
DoubleItems_AllTotalPrice=0;
intItems_TotalCount=0;
stringbegin="<tableid="inc"borderColor="#111111"height="35"cellSpacing="0"cellPadding="0"width="95%"border="1"><tr><tdalign="center"width="14%"height="35">商品编号</td><tdalign="center"width="25%"height="35">商品名称</td><tdalign="center"width="10%"height="35">单位</td><tdalign="center"width="10%"height="35">数量</td><tdalign="center"width="20%"height="35">单价（元）</td><tdalign="center"width="21%"height="35">金额（元）</td></tr>";
for(intrb=0;rb<count;rb++)
{
Items_Type=ds.Tables[0].Rows[rb][0].ToString();
Items_Name=ds.Tables[0].Rows[rb][1].ToString();
Items_Unit=ds.Tables[0].Rows[rb][2].ToString();
Items_Count=ds.Tables[0].Rows[rb][3].ToString();
Items_Price=Double.Parse(ds.Tables[0].Rows[rb][4].ToString()).ToString("0.00");
Items_TotalPrice=(Double.Parse(Items_Price)*Double.Parse(Items_Count)).ToString("0.00");
Items_AllTotalPrice+=Double.Parse(Items_TotalPrice);
Items_TotalCount+=Int32.Parse(Items_Count);
strFirstMenu+="<tr><tdwidth="14%"height="20">"+Items_Type+"</td><tdwidth="25%"height="20">"+Items_Name+"</td><tdwidth="10%"height="20">"+Items_Unit+"</td><tdwidth="10%"height="20">"+Items_Count+"</td><tdwidth="20%"height="20">"+Items_Price+"</td><tdwidth="21%"height="20">"+Items_TotalPrice+"</td></tr>";
}
stringFirstMenu=begin+strFirstMenu+"</table>";
doData.conn.Close();
returnFirstMenu;
}
发表于@2005年12月30日3:06PM|评论(0)
URL传输参数加密解密
最近做一个论坛入口时要实现帐号和密码不在IE地址栏出现而做的
index.aspx.cs(加密处理)
Byte[]Iv64={11,22,33,44,55,66,77,85};
Byte[]byKey64={10,20,30,40,50,60,70,80};
publicstringEncrypt(stringstrText)
{
try
{
DESCryptoServiceProviderdes=newDESCryptoServiceProvider();
Byte[]inputByteArray=Encoding.UTF8.GetBytes(strText);
MemoryStreamms=newMemoryStream();
CryptoStreamcs=newCryptoStream(ms,des.CreateEncryptor(byKey64,Iv64),CryptoStreamMode.Write);
cs.Write(inputByteArray,0,inputByteArray.Length);
cs.FlushFinalBlock();
returnConvert.ToBase64String(ms.ToArray());
}
catch(Exceptionex)
{
returnex.Message;
}
}
privatevoidbtnLogin_Click(objectsender,System.Web.UI.ImageClickEventArgse)
{
DateTimenowTime=DateTime.Now;
stringpostUser=txtUser.Text.ToString();
stringpostPass=txtPassword.Text.ToString();
Response.Redirect("Login.aspx?clubID="+Encrypt(postUser+","+postPass+","+nowTime.ToString()));
}
login.aspx.cs(解密处理)
//随机选8个字节既为密钥也为初始向量
Byte[]byKey64={10,20,30,40,50,60,70,80};
Byte[]Iv64={11,22,33,44,55,66,77,85};
publicstringDecrypt(stringstrText)
{
Byte[]inputByteArray=newbyte[strText.Length];
try
{
DESCryptoServiceProviderdes=newDESCryptoServiceProvider();
inputByteArray=Convert.FromBase64String(strText);
MemoryStreamms=newMemoryStream();
CryptoStreamcs=newCryptoStream(ms,des.CreateDecryptor(byKey64,Iv64),CryptoStreamMode.Write);
cs.Write(inputByteArray,0,inputByteArray.Length);
cs.FlushFinalBlock();
System.Text.Encodingencoding=System.Text.Encoding.UTF8;
returnencoding.GetString(ms.ToArray());
}
catch(Exceptionex)
{
returnex.Message;
}
}
privatevoidPage_Load(objectsender,System.EventArgse)
{
if(Request.Params["clubID"]!=null)
{
stringoriginalValue=Request.Params["clubID"];
originalValue=originalValue.Replace("","+");
//+号通过url传递变成了空格。
stringdecryptResult=Decrypt(originalValue);
//DecryptString(string)解密字符串
stringdelimStr=",";
char[]delimiterArray=delimStr.ToCharArray();
string[]userInfoArray=null;
userInfoArray=decryptResult.Split(delimiterArray);
stringuserName=userInfoArray[0];
UseruserToLogin=newUser();
userToLogin.Username=userInfoArray[0];
userToLogin.Password=userInfoArray[1];
......
}
}