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#2
qq28895779662022-04-18 16:38
就是个来回取值显示么，跨个线程完事
CrossThreadCall.cs  程序代码：using System.Threading; using System.Windows.Forms; public static class CrossThreadCall { public static void CrossThreadCalls(this Control ctl, ThreadStart del) { if (del == null) return; if (ctl.InvokeRequired) ctl.Invoke(del, null); else del(); } } 比如调用，引用下上面的cs文件 程序代码：this.CrossThreadCalls(() => { xxx=xxx 或 xxx.Text="xxxx"; }); |
程序代码：using System;
using System.Collections.Generic;
using using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace ProcessMethodCall
{
public partial class Form1 : Form
{
private delegate void WriteTextBox(char ch);
private WriteTextBox writeTextBox;
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
if(checkBox1.Checked == true)
{
groupBox2.Text = "运行中...";
groupBox2.Refresh();
textBox1.Clear();
textBox1.Refresh();
writeTextBox = new WriteTextBox(WriTextBox1);
WriTxt(writeTextBox);
groupBox2.Text = "任务1";
textBox3.Focus();
textBox3.SelectAll();
}
if(checkBox2.Checked == true)
{
groupBox2.Refresh();
groupBox3.Text = "运行中...";
groupBox3.Refresh();
textBox2.Clear();
textBox2.Refresh();
writeTextBox = new WriteTextBox(WriTextBox2);
WriTxt(writeTextBox);
groupBox3.Text = "任务2";
textBox3.Focus();
textBox3.SelectAll();
}
}
private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
}
private void WriTxt(WriteTextBox wMethod)
{
string strdata = textBox3.Text;
for(int i = 0; i < strdata.Length; i++)
{
wMethod(strdata[i]);
DateTime now = DateTime.Now;
while(now.AddSeconds(1) > DateTime.Now) { }
}
}
private void WriTextBox1(char ch)
{
textBox1.AppendText(ch + "\r");
}
private void WriTextBox2(char ch)
{
textBox2.AppendText(ch + "\r");
}
private void groupBox3_Enter(object sender, EventArgs e)
{
}
}
}
using System.Collections.Generic;
using using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace ProcessMethodCall
{
public partial class Form1 : Form
{
private delegate void WriteTextBox(char ch);
private WriteTextBox writeTextBox;
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
if(checkBox1.Checked == true)
{
groupBox2.Text = "运行中...";
groupBox2.Refresh();
textBox1.Clear();
textBox1.Refresh();
writeTextBox = new WriteTextBox(WriTextBox1);
WriTxt(writeTextBox);
groupBox2.Text = "任务1";
textBox3.Focus();
textBox3.SelectAll();
}
if(checkBox2.Checked == true)
{
groupBox2.Refresh();
groupBox3.Text = "运行中...";
groupBox3.Refresh();
textBox2.Clear();
textBox2.Refresh();
writeTextBox = new WriteTextBox(WriTextBox2);
WriTxt(writeTextBox);
groupBox3.Text = "任务2";
textBox3.Focus();
textBox3.SelectAll();
}
}
private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
}
private void WriTxt(WriteTextBox wMethod)
{
string strdata = textBox3.Text;
for(int i = 0; i < strdata.Length; i++)
{
wMethod(strdata[i]);
DateTime now = DateTime.Now;
while(now.AddSeconds(1) > DateTime.Now) { }
}
}
private void WriTextBox1(char ch)
{
textBox1.AppendText(ch + "\r");
}
private void WriTextBox2(char ch)
{
textBox2.AppendText(ch + "\r");
}
private void groupBox3_Enter(object sender, EventArgs e)
{
}
}
}
我理解的工作流程是否正确？
1.定义一个委托WriteTextBox，这个委托没有返回值，接受char类型参数。
2.创建一个writeTextBox委托实例。
3.WriTxt方法将WriteTextBox委托作为参数使用，
这个方法把textBox3中的得到的字符串以单个字符的形式填充委托的参数。
4.委托调用WriTextBox1方法，把从WriTxt方法中的得到的字符串写入textBox1。
有两个问题：
1.按照流程应该是先获取字符，再把字符写入到textBox1里，为什么
writeTextBox = new WriteTextBox(WriTextBox1);
在
WriTxt(writeTextBox);
前面执行？
2. private void groupBox3_Enter(object sender, EventArgs e)
{
}
这句话没有任何用处，为什么删了会报错？怎么才能正常删除？