小编LK *_*ung的帖子

如果添加行 DataTable

DataRow row = datatable1.NewRow();
row["column2"]="column2";
row["column6"]="column6";
datatable1.Rows.Add(row);

怎么样DataGridView？

导入softkeyboard示例后,当我打开input.xml时收到错误消息

The following classes could not be instantiated:
com.example.android.softkeyboard.LatinKeyboardView (Open Class, Show Error Log)
See the Error Log (Window > Show View) for more details

错误:

Thu Jul 19 00:03:38 CST 2012 com.example.android.softkeyboard.LatinKeyboardView failed to instantiate.
...
android.content.res.Resources$NotFoundException: Resource ID #0x10d000e type #0x3 is not valid
    at android.content.res.Resources.getBoolean(Resources.java:679)
    at android.inputmethodservice.KeyboardView.<init>(KeyboardView.java:363)
    at android.inputmethodservice.KeyboardView.<init>(KeyboardView.java:270)
    at com.example.android.softkeyboard.LatinKeyboardView.<init>(LatinKeyboardView.java:30)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    at com.android.ide.eclipse.adt.internal.editors.layout.ProjectCallback.instantiateClass(ProjectCallback.java:402)
    at com.android.ide.eclipse.adt.internal.editors.layout.ProjectCallback.loadView(ProjectCallback.java:166)
    at com.android.layoutlib.bridge.android.BridgeInflater.loadCustomView(BridgeInflater.java:205)
    at com.android.layoutlib.bridge.android.BridgeInflater.createViewFromTag(BridgeInflater.java:133)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:386)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:296)
    at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:279) …

我在values文件夹中找到了几个文件res夹:

xlarge screens are at least 960dp x 720dp
large screens are at least 640dp x 480dp
normal screens are at least 470dp x 320dp
small screens are at least 426dp x 320dp  
res/values-normal/ ==    res/values-v11/ ???
res/values-xlarge/ ==   res/values-v14/  ???

我对吗？或者我需要创建一个名为另一个文件夹values-xlarge,values-normal？

如果我需要两次使用资源,最好将它存储在String中吗？

public class Testing extends Activity{
    private String c_stringName;

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
            c_stringName= this.getString(R.string.name);


}
}

在test1()中,它可以返回test()成功返回的Void.但在test2()中,错误抛出.为什么？

//: Playground - noun: a place where people can play

import UIKit
import AVFoundation

func test()->Void{
    print("Hello")
}

func test1(){//print Hello
    return test()
}

func test2(){// throw error
    return Void
}

a = c(1,5,2,6,3,6,3,5,7)
b= c(5,3,5,7,2,6,9,3,6)
plot(a,type = "l")
lines(b)

是否有任何函数可以获得两个向量的所有交点？

可能重复:
ExpandableListView - 隐藏没有子项的组的指示符

隐藏无子女群体的指标

main.xml中

<ExpandableListView 
android:id="@+id/elv"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:groupIndicator="@drawable/selector">
</ExpandableListView>

selector.xml

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_empty="true" android:drawable="@android:color/transparent"/>
    <item android:state_expanded="true" android:drawable="@drawable/expanded" />
    <item android:drawable="@drawable/collapse" />
</selector>

它对我的ICS不起作用,似乎所有崩溃组的状态都是空的

考虑以下代码:

txtLastModifyUserID.DataBindings.Add("Text", c_bsDataSetSource, "LastModifyUserID");
txtLastModifyUserID.Text = "1234";

为什么不能更新源？

有两项活动.

活动A有一个可以切换到活动B的按钮.

活动B还有一个可以切换到活动A的按钮.

这是我的代码,

@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
    Log.e("current", context.getClass().toString());
    Log.e("changeto", tab.getTag().toString());
    if(context.getClass()==tab.getTag())
        return;

    Intent intent = new Intent(new Intent(context,(Class<?>) tab.getTag()));
    intent.addFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
    intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
    context.startActivity(intent); 
}

我想在切换活动时删除动画,但它不起作用.

但是,如果我删除

intent.addFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);

它完美地运作.为什么？

对不起,我的英语不好.

我有两个使用.net 4.0和.net 4.6.1的项目，KeyDerivation仅在.net 4.5.1之后可用。如何使用其他哈希库（例如 Rfc2898DeriveBytes/ Crypto）在 .Net 4.0 中获得相同的哈希结果

byte[] salt = new byte[128 / 8];
var hashedPassword = Convert.ToBase64String(KeyDerivation.Pbkdf2(
    password: "GN(o@D30",
    salt: salt,
    prf: KeyDerivationPrf.HMACSHA512,
    iterationCount: 100000,
    numBytesRequested: 256 / 8)
);