我正在尝试使用该参考.我知道它在c#4中.我不知道我现在有什么.
但基本上,当我写这行时:
Task.Factory.StartNew(someMethod);
它告诉我这是一个错误.有没有办法解决它,所以我的ide将识别该库(任务并行库)？
foreach (var shotItem in Invadershots)// it points to me to there and doesnt allow me to loop.."{"Collection was modified; enumeration operation may not execute."}"
{
shotItem.Move();// it happens when this simple method called (which actually checks some bool..if the shot was out of the winform).
if (shotItem.removeShot)
{
Invadershots.Remove(shotItem);
}
}
可能是因为我同时更改了列表项吗？
如何防止发生错误？
我正在建立一个论坛,它有4个表:用户,主题,评论,主题.
我建立了连接和页面..我开始使用ADO.net方式插入数据并选择数据.但后来我发现要进行更复杂的操作,我需要知道SQL.所以我正在寻找另一种方式,我发现我可以打开Visual Studio 2010,将Linq添加到生成对象关系设计器的SQL文件中.我读到了如何编写代码,我看到我只需要使用DataContext带有简单代码的对象的using语句来更新,添加,删除表中的行.
我想知道,使用一种查询方法有什么好处？
在性能或灵活性方面有区别吗？在SQL Express 2005中编写存储过程并将它们导入VS2010是浪费时间吗？
我在firefox中启用了javascript ..但它似乎不起作用:
<head runat="server">
<title></title>
<script src="Jquery.js" type="text/javascript">
$(function () { alert('Ready to do your bidding!'); });
$(document).ready(function () {
alert('Welcome to StarTrackr! Now no longer under police …');
});
</script>
没有警报出现
我创建了一个类:
public class AbortableBackgroundWorker : BackgroundWorker
{
private Thread workerThread;
protected override void OnDoWork(DoWorkEventArgs e)
{
workerThread = Thread.CurrentThread;
try
{
base.OnDoWork(e);
}
catch (ThreadAbortException)
{
e.Cancel = true; //We must set Cancel property to true!
Thread.ResetAbort(); //Prevents ThreadAbortException propagation
}
}
public void Abort()
{
if (workerThread != null)
{
workerThread.Abort();
workerThread = null;
}
}
}
以下是我如何使用它:
backgroundWorker1 = new AbortableBackgroundWorker();
//...
backgroundWorker1.RunWorkerAsync();
if (backgroundWorker1.IsBusy == true)
{
backgroundWorker1.Abort();//This method is unavailable :(
backgroundWorker1.Dispose();
}
另一个小问题..这个代码会取消背景工作者吗？
我试图通过这个:
Intent i=new Intent(ctx,SpendingsDetails.class);
extras.putString("SpendingAmount", "1");
extras.putString("SpendingDescription","2");
extras.putString("SpendingDate","3");
i.putExtras(extras);
startActivityForResult(i,1);
获取信息的活动会执行以下信息.
spendingAmount=(TextView)findViewById(R.id.spending_Sum);
spendingDetails=(TextView)findViewById(R.id.spending_Details);
Bundle extras=getIntent().getExtras();
if(extras!=null)
{
spendingAmount.setText(extras.getString("SpendingAmount"));
spendingDetails.setText(extras.getString("SpendingDescription"));
}
我收到一个错误,应用程序无法在第一个活动屏幕上继续.我做错了什么？
if(defined($_POST["message"]) && defined($_POST["name"]))
{
在那个if块中,不断抛出异常.我正在寻找一个函数,通过测试post变量是否存在来防止这种情况..如果它不存在则返回false而不是抛出异常
我有这个代码:
<script>
$(function() {
$("#tabs").tabs({ event: "mouseover" });
$("#tabs").tabs("add","#tab-4","Friends Discussions");
$("#tabs").tabs("add","#tab-5","Announcements");
$("#tabs").tabs("add","#tab-6","Contact");
});
</script>
<div class="demo" align="center" >
<div id="tabs">
<ul>
<li><a href="#tabs-1">Recent Discussions</a></li>
<li><a href="#tabs-2">Most Popular Discussions</a></li>
<li><a href="#tabs-3">Most Viewed Discussions</a></li>
</ul>
<div id="tabs-1">
<p>111111111111</p>
</div>
<div id="tabs-2">
<p>222222222222</p>
</div>
<div id="tabs-3">
<p>333333333333333</p>
</div>
<div id="tabs-4">
<p>4444444444</p>
</div>
<div id="tabs-5">
<p>555555555</p>
</div>
<div id="tabs-6">
666666666
</div>
</div>
</div>
选项卡4,5和6具有与选项卡1,2和3中显示的内容相同的内容.为什么会发生这种情况？
我想保存一个chessGameplay的状态.
private void saveToolStripMenuItem_Click(object sender, EventArgs e)// menu strip control
{
saveFileDialog1.InitialDirectory = @"c:\";
DialogResult result= saveFileDialog1.ShowDialog();
if (result == DialogResult.OK)
{
saveToFile(saveFileDialog1.FileName);
}
}
private void loadToolStripMenuItem_Click(object sender, EventArgs e)
{
openFileDialog1.InitialDirectory = @"c:\";
DialogResult result= openFileDialog1.ShowDialog();
if (result == DialogResult.OK)
{
openFile(openFileDialog1.FileName);
}
}
GameSave game2 = new GameSave();
public void saveToFile(string s)
{
game2.setLoadedPieces(codeFile.PieceState());// will pass the current pieces state. that is an array of all the chess pieces objects..which determine where each piece is on the …