C＃ - 在运行应用程序时暂停线程 [英] C#-pause thread while running application
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问题描述
我创建了1个应用程序从Excel中读取并在每个文本框中显示这些内容，我使用线程概念等待（从给定输入休眠）每行读取并显示在文本框中。
问题：我想在运行应用程序时暂停线程（在RuntTime期间），当我们点击另一个按钮时，我已经尝试过了，但是焦点不是来找我们。
// 在文本中显示框。
私有 void DisplayText（）
{
BoomStubAngle：
int BoomStubAngle = 0 ;
for （ int i = j; i < = ds.Tables [ 0 ]。Rows.Count; i ++）
{
string BSAname = ds.Tables [ 0 ]。行[i] [BSA] .ToString（）;
txt_BSA.Text = BSAname.ToString（）;
txt_BSA.Focus（）;
}
BoomForeAngle：
int BoomForeAngle = 1 ;
for （ int i = j; i < = ds.Tables [ 0 ]。Rows.Count; i ++）
{
字符串 BFAname = ds.Tables [ 0 ]。行[i] [BFA] .ToString（）;
txt_BFA.Text = BFAname.ToString（）;
txt_BFA.Focus（）;
}
BoomForeHeadEndPressure：
int BoomForeHeadEndPressure = 2 ;
for （ int i = j; i < = ds.Tables [ 0 ]。Rows.Count; i ++）
{
字符串 BFname = ds.Tables [ 0 ]。行[i] [BFHEP] .ToString（）;
txt_BFHEP1.Text = BFname.ToString（）;
txt_BFHEP1.Focus（）;
j ++;
// 线程休眠时间 - 来自用户输入
Thread.Sleep（转换.ToInt32（STIMER））;
goto BoomStubAngle;
}
connclose：
connExcel.Close（）;
}
// ??当线程是运行时，我没有在此按钮上获得焦点运行。??
私有 void button2_Click（ object sender，EventArgs e）
{
startstop = false ;
// do
// {
// Thread.Sleep（1000）;
// }
// while（startstop == true）;
// DisplayText（）;
}
我尝试过：
// 要在文本框中显示。
private void DisplayText（）
{
BoomStubAngle：
in t BoomStubAngle = 0 ;
for （ int i = j; i < = ds.Tables [ 0 ]。Rows.Count; i ++）
{
string BSAname = ds.Tables [ 0 ]。行[i] [BSA] .ToString（）;
txt_BSA.Text = BSAname.ToString（）;
txt_BSA.Focus（）;
}
BoomForeAngle：
int BoomForeAngle = 1 ;
for （ int i = j; i < = ds.Tables [ 0 ]。Rows.Count; i ++）
{
字符串 BFAname = ds.Tables [ 0 ]。行[i] [BFA] .ToString（）;
txt_BFA.Text = BFAname.ToString（）;
txt_BFA.Focus（）;
}
BoomForeHeadEndPressure：
int BoomForeHeadEndPressure = 2 ;
for （ int i = j; i < = ds.Tables [ 0 ]。Rows.Count; i ++）
{
字符串 BFname = ds.Tables [ 0 ]。行[i] [BFHEP] .ToString（）;
txt_BFHEP1.Text = BFname.ToString（）;
txt_BFHEP1.Focus（）;
j ++;
// 线程休眠时间 - 来自用户输入
Thread.Sleep（转换.ToInt32（STIMER））;
goto BoomStubAngle;
}
connclose：
connExcel.Close（）;
}
// ??当线程是运行时，我没有在此按钮上获得焦点运行。??
私有 void button2_Click（ object sender，EventArgs e）
{
startstop = false ;
// do
// {
// Thread.Sleep（1000）;
// }
// while（startstop == true）;
// DisplayText（）;
}
解决方案
问题可能是你只有一个线程：你展示的唯一代码包括Thread.Sleep在UI线程上运行（或者你会遇到交叉线程异常时你访问你的文本框） - 所以如果UI线程是睡着了，UI控件不起作用。即使它确实如此，如果在UI线程上调用DisplayText - 它就是 - 那么没有其他UI可以运行，直到它完成。它不做...
该代码非常差：为什么要加载相同的控件并在循环中重复设置焦点？在方法退出之前，用户将不会看到任何更新，一旦启动它就不会。并且转到？为什么呢？
I have created 1 application Reading from Excel and displaying those content in Each text box, I have used threading concept to wait(sleep from Given Input) for each line to read and display in text box.
Ques: I want to Pause the thread while running application(During RuntTime) when we click another button, I have tried from my side, but focus is not coming to us.
// To Display in Text box.
private void DisplayText()
{
BoomStubAngle:
int BoomStubAngle = 0;
for (int i = j; i <= ds.Tables[0].Rows.Count; i++)
{
string BSAname = ds.Tables[0].Rows[i][BSA].ToString();
txt_BSA.Text = BSAname.ToString();
txt_BSA.Focus();
}
BoomForeAngle:
int BoomForeAngle = 1;
for (int i = j; i <= ds.Tables[0].Rows.Count; i++)
{
string BFAname = ds.Tables[0].Rows[i][BFA].ToString();
txt_BFA.Text = BFAname.ToString();
txt_BFA.Focus();
}
BoomForeHeadEndPressure:
int BoomForeHeadEndPressure = 2;
for (int i = j; i <= ds.Tables[0].Rows.Count; i++)
{
string BFname = ds.Tables[0].Rows[i][BFHEP].ToString();
txt_BFHEP1.Text = BFname.ToString();
txt_BFHEP1.Focus();
j++;
// Thread sleep Time-From User Input
Thread.Sleep(Convert.ToInt32(Stimer));
goto BoomStubAngle;
}
connclose:
connExcel.Close();
}
//??Iam not getting focus to this button in run time when thread is running.??
private void button2_Click(object sender, EventArgs e)
{
startstop = false;
//do
//{
// Thread.Sleep(1000);
//}
//while (startstop == true);
//DisplayText();
}
What I have tried:
// To Display in Text box.
private void DisplayText()
{
BoomStubAngle:
int BoomStubAngle = 0;
for (int i = j; i <= ds.Tables[0].Rows.Count; i++)
{
string BSAname = ds.Tables[0].Rows[i][BSA].ToString();
txt_BSA.Text = BSAname.ToString();
txt_BSA.Focus();
}
BoomForeAngle:
int BoomForeAngle = 1;
for (int i = j; i <= ds.Tables[0].Rows.Count; i++)
{
string BFAname = ds.Tables[0].Rows[i][BFA].ToString();
txt_BFA.Text = BFAname.ToString();
txt_BFA.Focus();
}
BoomForeHeadEndPressure:
int BoomForeHeadEndPressure = 2;
for (int i = j; i <= ds.Tables[0].Rows.Count; i++)
{
string BFname = ds.Tables[0].Rows[i][BFHEP].ToString();
txt_BFHEP1.Text = BFname.ToString();
txt_BFHEP1.Focus();
j++;
// Thread sleep Time-From User Input
Thread.Sleep(Convert.ToInt32(Stimer));
goto BoomStubAngle;
}
connclose:
connExcel.Close();
}
//??Iam not getting focus to this button in run time when thread is running.??
private void button2_Click(object sender, EventArgs e)
{
startstop = false;
//do
//{
// Thread.Sleep(1000);
//}
//while (startstop == true);
//DisplayText();
} 解决方案
The problem would probably be that you only have one Thread: the only code you show that includes Thread.Sleep is running on the UI thread (or you would get cross threading exceptions when you access your textboxes) - so if the UI thread is asleep, UI controls don't work. Even if it did, if DisplayText is being called on the UI thread - which it is - then no other UI can function utill it's finished. Which it doesn't do...
That code is pretty poor: why are you loading the same control and setting focus to it repeatedly in a loop? The user won't see any updates until the method exits anyway, which once it starts it won't do. Andgoto? Why?
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