矩形形状开始闪烁 [英] Rectangle shape starts flickering
问题描述
大家好，
有人能告诉我如何避免在窗体中闪烁矩形形状。我在我的表格中使用了矩形形状控制。我有一个相同形式的串口通信，所以当通信正在进行中时，我只是最小化了形式&当我恢复矩形形状时，每500ms闪烁一次，因为我已设置串口每500ms接收一次数据。因此&当我收到数据时，它开始闪烁。如何避免这样的事情？？
我用过.doublebuffered = true;在构造函数&
protected 覆盖 CreateParams CreateParams
{
get
{
CreateParams cp = base .CreateParams;
cp.ExStyle | = 0x02000000;
return cp;
}
}
仍然没有找到任何改进，所以plz帮我解决了这个问题。 />
提前谢谢。
我有一个mdi表单，其中我打开了1个子表单，包含矩形形状，串口通信&其中的许多其他控件。我做的是，我将选择comport&按开始按钮开始通过串口通信。通信开始后，处理接收的数据并进行处理。 UI会相应更新。我觉得在更新UI时，矩形形状正在被感染。以下是我的代码。
要修复矩形形状@屏幕中心，我使用了以下代码：
private void DisplayWindow_MaximumSizeChanged（ object sender，EventArgs e）
{
rectangleShape1.Left =（Screen.PrimaryScreen.Bounds.Width / 2 < /跨度>） - 183;
rectangleShape2.Left =（Screen.PrimaryScreen.Bounds.Width / 2 ） - 153 ;
}
private void rectangleShape1_ParentChanged（ object sender，EventArgs e）
{
rectangleShape1.Anchor = AnchorStyles.Top;
rectangleShape2.Anchor = AnchorStyles.Top;
}
Serial Port Comm部分：
< pre lang =c＃> private void comstartbtn_Click（ object sender，EventArgs e）
{
sp.PortName = cmpprtcmbbox.SelectedItem.ToString（）;
sp.Parity = Parity.None;
sp.StopBits = StopBits.One;
sp.BaudRate = 9600 ;
sp.DataBits = 8 ;
timer = new System.Threading.Timer（ new TimerCallback（Receive_Data）， null ， 0 ， 500 ）;
尝试
{
如果（sp。 IsOpen == false ）
{
sp.Open（）;
comstartbtn.Enabled = false ;
cmpprtcmbbox.Enabled = false ;
comstpbtn.Enabled = true ;
（（MainWindow） this .MdiParent）.toolStripStatusLabel1.Text = STATUS： + sp.PortName + 已成功打开;
}
}
catch （例外情况）
{
}
}
私有 void Receive_Data（ object obj）
{
try
{
int btr = sp.BytesToRead;
data_9 = new byte [btr];
sp.Read（data_9， 0 ，btr）;
for （ int i = 0 ; i < btr; i ++）
{
if （data_9 [i] == 36 && start_collction == 0 ）
{
start_collction = 1 ;
}
if （start_collction == 1 ）
{
serialData.Append（data_9 [i] .ToString（）+ ，）;
if （serialData.ToString（）。包含（ 65））
{
start_collction = 0 ;
q = serialData.ToString（）。Split（' ，'）;
List< string> list = new List< string>（q）;
list.Remove（ 65）;
list.Remove（ ）;
if （q [ 1 ] == 1）
{
UV1ledbulb.Blink（ 0 ）;
}
}
}
这个UV1ledbulb位于矩形形状上。您的代码覆盖
CreateParams 是无关紧要的，硬编码立即常量是坏的。相反，您可以使用 DoubleBuffered ，或者使用 SetStyle 并设置样式 System.Windows.Forms.ControlStyles.AllPaintingInWmPaint | System.Windows.Forms.ControlStyles.OptimizedDoubleBuffer ：
http://msdn.microsoft.com/en-us/library/system.windows.forms.controlstyles.aspx [ ^ ]，
http://msdn.microsoft.com/en-us/library/system.windows.forms .control.setstyle.aspx [ ^ ]。
如果这没有帮助，请尝试创建最小化的完整代码示例并发布。请看我对这个问题的评论。
Jagadisha_Ingenious问：先生，如果不是MDI，那么任何其他替代方案......？因为我的项目中有多个表单...
当然。我可以解释一下该做什么。请看我过去的答案：
如何在WPF中创建MDI父窗口？ [ Solution 2 ]，
在WPF中使用MDI窗口的问题 [ ^ ]，
< a href =http://www.codeproject.com/Answers/172678/MDIContainer-giving-error#answer2> MDIContainer给出错误 [ ^ ]，
如何设置子窗体最大化，最后的子窗体最小化 [ ^ ]。
Hi all,
Can anybody tell me how to avoid flickering of rectangle shape in windows form. I have used rectangle shape control in my form & i have a serial port communication in the same form, so when the communication is in process i just minimized the form & when i restored the rectangle shape flickers every 500ms since i have set the serial port to receive data every 500ms. So as & when i receive data it starts flickering. How to avoid such a thing...?
I have used this.doublebuffered = true; in the constructor &
protected override CreateParams CreateParams
{
get
{
CreateParams cp = base.CreateParams;
cp.ExStyle |= 0x02000000;
return cp;
}
}
Still found no improvements, so plz help me out in resolving this issue.
Thanks in advance.
I have a mdi form in which i have opened 1 of the childform, containing rectangle shape, serial port communication & many other controls in it. What i do is, i will select the comport & press start button to start communicating through serial port. Once the communication starts the received data is processed & UI is updated accordingly. What i feel is while updating the UI the rectangle shape is being infected. The following is my code.
To fix the rectangle shape @ the centre of the screen i have used the following code:
private void DisplayWindow_MaximumSizeChanged(object sender, EventArgs e)
{
rectangleShape1.Left = (Screen.PrimaryScreen.Bounds.Width / 2)-183;
rectangleShape2.Left = (Screen.PrimaryScreen.Bounds.Width / 2) - 153;
}
private void rectangleShape1_ParentChanged(object sender, EventArgs e)
{
rectangleShape1.Anchor = AnchorStyles.Top;
rectangleShape2.Anchor = AnchorStyles.Top;
}
Serial Port Comm part:
private void comstartbtn_Click(object sender, EventArgs e)
{
sp.PortName = cmpprtcmbbox.SelectedItem.ToString();
sp.Parity = Parity.None;
sp.StopBits = StopBits.One;
sp.BaudRate = 9600;
sp.DataBits = 8;
timer = new System.Threading.Timer(new TimerCallback(Receive_Data), null, 0, 500);
try
{
if (sp.IsOpen == false)
{
sp.Open();
comstartbtn.Enabled = false;
cmpprtcmbbox.Enabled = false;
comstpbtn.Enabled = true;
((MainWindow)this.MdiParent).toolStripStatusLabel1.Text = "STATUS : " + sp.PortName+ " Opened successfully";
}
}
catch (Exception ex)
{
}
}
private void Receive_Data(object obj)
{
try
{
int btr = sp.BytesToRead;
data_9 = new byte[btr];
sp.Read(data_9, 0, btr);
for (int i = 0; i < btr; i++)
{
if (data_9[i] == 36 && start_collction == 0)
{
start_collction = 1;
}
if (start_collction == 1)
{
serialData.Append(data_9[i].ToString() + ",");
if (serialData.ToString().Contains("65"))
{
start_collction = 0;
q = serialData.ToString().Split(',');
List<string> list = new List<string>(q);
list.Remove("65");
list.Remove("");
if (q[1] == "1")
{
UV1ledbulb.Blink(0);
}
}
}
This UV1ledbulb lies on the rectangle shape.
Your code overridingCreateParamsis irrelevant, and hard-coded immediate constant is bad. Instead, you can just useDoubleBuffered, or, alternatively, useSetStyleand set the stylesSystem.Windows.Forms.ControlStyles.AllPaintingInWmPaint | System.Windows.Forms.ControlStyles.OptimizedDoubleBuffer:
http://msdn.microsoft.com/en-us/library/system.windows.forms.controlstyles.aspx[^],
http://msdn.microsoft.com/en-us/library/system.windows.forms.control.setstyle.aspx[^].
If this does not help, try to create a minimized complete code sample and post it. Please see my comment to the question.
—SA
Jagadisha_Ingenious asked:Sir if not MDI, then any other alternatives for it…? Since i have multiple forms in my project…
Sure. I can explain what to do instead. Please see my past answers:
How to Create MDI Parent Window in WPF? [Solution 2],
Question on using MDI windows in WPF[^],
MDIContainer giving error[^],
How to set child forms maximized, last childform minimized[^].
—SA
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