Windows2008 Hyper-V可外連網路設定

在虛擬網路管理員中要選擇外部,建議和主機的網路卡分開會較好管理.

在OS安裝完畢之後,網路部份預設為網路介面卡,刪除後另外新增傳統網路介面卡,在虛擬主機中設定好IP等相關資料就可以上網

Asp.Net取得瀏覽器版本及OS版本

取得瀏覽器版本

System.Web.HttpBrowserCapabilities browser = Request.Browser;
    string s = "Browser Capabilities\n"
        + "Type = "                    + browser.Type + "\n"
        + "Name = "                    + browser.Browser + "\n"
        + "Version = "                 + browser.Version + "\n"
        + "Major Version = "           + browser.MajorVersion + "\n"
        + "Minor Version = "           + browser.MinorVersion + "\n"
        + "Platform = "                + browser.Platform + "\n"
        + "Is Beta = "                 + browser.Beta + "\n"
        + "Is Crawler = "              + browser.Crawler + "\n"
        + "Is AOL = "                  + browser.AOL + "\n"
        + "Is Win16 = "                + browser.Win16 + "\n"
        + "Is Win32 = "                + browser.Win32 + "\n"
        + "Supports Frames = "         + browser.Frames + "\n"
        + "Supports Tables = "         + browser.Tables + "\n"
        + "Supports Cookies = "        + browser.Cookies + "\n"
        + "Supports VBScript = "       + browser.VBScript + "\n"
        + "Supports JavaScript = "     + 
            browser.EcmaScriptVersion.ToString() + "\n"
        + "Supports Java Applets = "   + browser.JavaApplets + "\n"
        + "Supports ActiveX Controls = " + browser.ActiveXControls 
              + "\n";

取得OS版本

Use Request.UserAgent

if (Request.UserAgent.IndexOf("Windows NT 5.1") > 0)
{
//xp
}
else if (Request.UserAgent.IndexOf("Windows NT 6.0") > 0)
{
//VISTA
}
else if (Request.UserAgent.IndexOf("Windows NT 6.1") > 0)
{
//7
}
else if (Request.UserAgent.IndexOf("Windows NT 6.2") > 0) 
{ 
//8
}
else if (Request.UserAgent.IndexOf("Windows NT 6.3") > 0) 
{ 
//8.1
}
else if (Request.UserAgent.IndexOf("Windows NT 10.0") > 0) 
{ 
//10
}

Android imageButton底圖透明

在XML中將imageButton的屬性中增加android:background="@android:color/transparent",就可以將imageButton底圖設為透明

Android常用監聽

Button
View.OnClickListener
物件點一下


View.OnLongClickListener
物件長按


Radio
RadioGroup.OnCheckedChangeListener
單選群組中,選項變更


EditText
TextWatcher
輸入文字時


CheckBox
CompoundButton.OnCheckedChangeListener
複選選項變更




Spinner
AdapterView.OnitemSelectedListener
一選取項目就觸發

Android要使用Listener來監聽物件

//首先需在MainActivity implements監聽動作

public class MainActivity extends AppCompatActivity
implements RadioGroup.OnCheckedChangeListener,TextWatcher
{

RadioGroup unit;
EditText value;
TextView txv;

@Overrideprotected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
//設定要監聽的物件
    unit=(RadioGroup)findViewById(R.id.radioGroup);
    unit.setOnCheckedChangeListener(this);
    value=(EditText)findViewById(R.id.editText);
    value.addTextChangedListener(this);
    txv=(TextView)findViewById(R.id.textView2);

}

//以下是監聽的事件
@Overridepublic void onCheckedChanged(RadioGroup group, int checkedId) {
    calc();
}


@Overridepublic void beforeTextChanged(CharSequence s, int start, int count, int after) {

}

@Overridepublic void onTextChanged(CharSequence s, int start, int before, int count) {

}

@Overridepublic void afterTextChanged(Editable s) {
    calc();
}

protected void calc(){
   
}

}

使用String.format()格式化字串

String.format()可以用來格式化字串

例如
浮點數取小數點後一位
String.format("%.1f",3.14159);會取得3.1

%將3.14159帶入
.1取得小數點後一位
f要轉換的值是浮點數

判斷EditText有無輸入值

要判斷EditText有無輸入值,可用以下方式判斷
if("".equals(editText.getText().toString().trim()))
{
}

或可用
editText.getText().length()== 0
editText.getText().toString() == null 
editText.getText().toString().equals("")