1.判断浏览器是否存在滚动条(纵向)
2.通过js获得客户端的ip及MAC和主机名
3.图片转化为二进制
4.字符串和二进制相互转化
①
//判断浏览器是否存在滚动条(纵向)
if (document.documentElement.clientWidth < document.documentElement.offsetWidth-4){
//执行相关脚本。
｝
//横向
if (document.documentElement.clientHeight < document.documentElement.offsetHeight-4){
//执行相关脚本。
}
②
获取服务器和客户端IP
1、ASP.NET中获取服务器的IP地址：
using System.Net;
string myIP,myMac;
System.Net.IPAddress[] addressList = Dns.GetHostByName(Dns.GetHostName()).AddressList;
if ( addressList.Length>1) {
myIP = addressList[0].ToString();
myMac = addressList[1].ToString();
}
else {
myIP = addressList[0].ToString();
myMac = "没有可用的连接"；
}
myIP地址就是服务器端的ip地址。
2.获取客户端的ip地址，可以使用
string ip = Request.ServerVariables["REMOTE_ADDR"].ToString();
3.通过js获得客户端的ip及MAC和主机名
<html>
<head>
<title>JS获取IP地址</title>
<meta http-equiv="Content-Type" content="text/html; charset=gbk">
</head>
<body>
<object classid="CLSID:76A64158-CB41-11D1-8B02-00600806D9B6" id="locator" style="display:none;visibility:hidden"></object>
<object classid="CLSID:75718C9A-F029-11d1-A1AC-00C04FB6C223" id="foo" style="display:none;visibility:hidden"></object>
<form name="myForm">
<br/>MAC地址：<input type="text" name="macAddress">
<br/>IP地址：<input type="text" name="ipAddress">
<br/>主机名：<input type="text" name="hostName">
</form>
</body>
</html>
<script language="javascript">
var sMacAddr=""; //MAC地址
var sIPAddr=""; //IP地址
var sDNSName=""; //主机名
var service = locator.ConnectServer();
service.Security_.ImpersonationLevel=3;
service.InstancesOfAsync(foo, 'Win32_NetworkAdapterConfiguration');
</script>
<script FOR="foo" EVENT="OnObjectReady(objObject,objAsyncContext)" LANGUAGE="JScript">
if(objObject.IPEnabled != null && objObject.IPEnabled != "undefined" && objObject.IPEnabled == true)
{
if(objObject.IPEnabled && objObject.IPAddress(0) !=null && objObject.IPAddress(0) != "undefined")
sIPAddr = objObject.IPAddress(0);
if(objObject.MACAddress != null &&objObject.MACAddress != "undefined")
sMacAddr = objObject.MACAddress;
if(objObject.DNSHostName != null &&objObject.DNSHostName != "undefined")
sDNSName = objObject.DNSHostName;
}
</script>
<script FOR="foo" EVENT="OnCompleted(hResult,pErrorObject, pAsyncContext)" LANGUAGE="JScript">
myForm.macAddress.value=sMacAddr;
myForm.ipAddress.value=sIPAddr;
myForm.hostName.value=sDNSName;
</script>
③
图片转化为二进制
//把指定路径的图片转化为二进制
public byte[] GetPictureData(string imagepath)
{
//根据图片文件的路径使用文件流打开，并保存为byte[]
FileStream fs = new FileStream(imagepath, FileMode.Open);
byte[] byData = new byte[fs.Length];
fs.Read(byData, 0, byData.Length);
fs.Close();
return byData;
}
//把上传图片转化为二进制
protected string btnAdd_Click(object sender, EventArgs e)//上传单击按钮
{
//获得图象并把图象转换为byte[]
HttpPostedFile upPhoto = UpPhoto.PostedFile;
int upPhotoLength = upPhoto.ContentLength;
byte[] PhotoArray = new Byte[upPhotoLength];
Stream PhotoStream = upPhoto.InputStream;
PhotoStream.Read(PhotoArray, 0, upPhotoLength);
return Encoding.UTF8.GetString(PhotoArray);
}
//把图片显示在页面上
//ContentType的类型可为1.application/octet-stream,2.image/JPEG等
HttpContext.Current.Response.ContentType = "application/octet-stream";
HttpContext.Current.Response.BinaryWrite(PhotoArray);
//把二进制转化为图像
public System.Drawing.Image ReturnPhoto(byte[] streamByte){
System.IO.MemoryStream ms = new System.IO.MemoryStream(streamByte);
System.Drawing.Image img = System.Drawing.Image.FromStream(ms);
return img;
}
//直接把图片转化为二进制
public byte[] PhotoImageInsert(System.Drawing.Image imgPhoto){
//将Image转换成流数据，并保存为byte[]
MemoryStream mstream = new MemoryStream();
imgPhoto.Save(mstream, System.Drawing.Imaging.ImageFormat.Bmp);
byte[] byData = new Byte[mstream.Length];
mstream.Position = 0;
mstream.Read(byData, 0, byData.Length);
mstream.Close();
return byData;
}
④
//字符串和二进制相互转化.
//把字符串转化为二进制.
public static byte[] StringToByteArray(string str)
{ return Encoding.UTF8.GetBytes(str); }
//把二进制转化为字符串
public static string ByteArrayToString(byte[] bytes)
{ return Encoding.UTF8.GetString(bytes); }
