问题列表 - 第31712页

I am trying to show or hide tabpages as per user choice. If user selects gender male then form for male in a tabpage "male" should be displayed and if user selects female then similar next form should be displayed in next tab "female"

I tried using

tabControl1.TabPages.Remove(...)

and

tabControl1.TabPages.Add(...)

It adds and removes the tabpages but doing so will loose my controls on tabpages too... i can't see them back. what's the problem here?

I have a source text in a file and looking for a code that would take the second (or n-th - in general) row from this file and print to a seperate file.

Any idea how to do this?

If I write class, then all ok

class C
{
    protected int _attr;
    int attr { get { return _attr; } }
}

class CWithSet : C
{
    int attr { set { _attr = value; } }
}

But, if I write interface

interface I
{
    int attr { get; }
}

interface IWithSet : I
{
    int attr { set; }
}

then I have warring: "'IWithSet.attr' hides inherited member 'I.attr'. Use the new keyword if hiding was …

我可以在互联网上找到的唯一很好的参考是这个白皮书，它解释了数据库分层是什么，但没有解释它是如何工作的：

数据库分层背后的概念是多种（旧的和新的）数据库技术的无缝共存，以最好地解决业务问题。

但是，它是如何实施的？它是如何工作的？

任何与此相关的链接也会有所帮助。谢谢。

I downloaded a project developed by Apple employees ( who taught course at Stanford on iPhone application development). Strangely , the frameworks are red.

http://img.skitch.com/20100730-kcjun96mp2pxnpg7w3x6njw57.jpg

I tried to locate coreGraphics.framework and UIKit.framework to add them again but i couldnt find them either.

Taimur

Possible Duplicate:
Why do I get “error: … must be a reference type” in my C# generic method?

I have 2 Repository methods that are almost identical:

public IList<Fund> GetFundsByName(int pageSize, string searchExpression)
{
    return _session.CreateCriteria<Fund>()
        .AddNameSearchCriteria<Fund>(searchExpression)
        .AddOrder<Fund>(f => f.Name, Order.Asc)
        .SetMaxResults(pageSize).List<Fund>();
}

public IList<Company> GetCompaniesByName(int pageSize, string searchExpression)
{
    return _session.CreateCriteria<Company>()
        .AddNameSearchCriteria<Company>(searchExpression)
        .AddOrder<Company>(f => f.Name, Order.Asc)
        .SetMaxResults(pageSize).List<Company>();
}

The only difference is that the first one's _session.CreateCriteria is of type Fund and the second one is company

I was …

I am fairly new to Tomcat. I just managed to build a project and exported it as a WAR file. I tried manually copying a WAR file to the Tomcat folder then restarting. It created the folder structure and everything but I get a 404 Status code when I try to reach the application. I tried deploying it through the Tomcat Admin panel but I'm seeing the same behavior. Am I doing anything fundamentally wrong?

I've a time ticker event, I want to write it to a label in format ( hours:minutes:seconds 00:00:00 ) it does not print the 0 values! it shows like ::1 when starts to count... what to do? Solved, thanks for all replies

private void timer_Tick(object sender, EventArgs e)
        {
            seconds++;
            if(seconds == 59)
            {
                minutes++;
                seconds = 0;
            }
            if(minutes == 59)
            {
                hours++;
                minutes = 0;
            }

            this.label1.Text = string.Format("{0:##}:{1:##}:{2:##}", hours, minutes, seconds);
        }

I have two Lines: L1 and L2. I want to calculate the angle between the two lines. L1 has points: {(x1, y1), (x2, y2)} and L2 has points: {(x3, y3), (x4, y4)}.

How can I calculate the angle formed between these two lines, without having to calculate the slopes? The problem I am currently having is that sometimes I have horizontal lines (lines along the x-axis) and the following formula fails (divide by zero exception):

arctan((m1 - m2) / …

Hello I need to destroy javascript cookies on a page refresh. I need to set a new bunch of cookies on every page load which help me render the web page based on user options. Is there a method to destroy cookies on a page refresh??