[6.流程控制语句.pptVIP

程序运行结果 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 【计算】按钮的Click事件代码为： private void button1_Click(object sender, System.EventArgs e) { lblResult.Text=; // 清空标签 int a=int.Parse(txtA.Text); int b=int.Parse(txtB.Text); if(chkAdd.Checked) lblResult.Text+=两个数的和为：+(a+b)+\n; if(chkSub.Checked) lblResult.Text+=两个数的差为：+(a-b)+\n; if(chkMult.Checked) lblResult.Text+=两个数的积为：+(a*b)+\n; Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. if(chkDiv.Checked) if(b==0) { MessageBox.Show(0不能作除数！); } else { double result=a/b; lblResult.Text += 整数1除以整数2的商为： + result; } } Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. (3) 使用分组框控件（GroupBox） 如同窗体一样，分组框（GroupBox）控件也是一种容器类控件，在分组框控件内部的控件可以随分组框一起移动，并且受到分组框控件某些属性（Visible、Enabled）的控制。 在多数情况下只需使用分组框控件将功能类似或关系紧密的控件分成可标识的控件组，而不必响应分组框控件的事件。需要修改的通常是分组框控件的Text或Font属性以说明框内控件的功能或作用，从而起修饰窗体的作用。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 例: Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. private void radioButton1_CheckedChanged (object sender, EventArgs e) { if (radioButton1.Checked == true) textBox1.Font = new Font(黑体, textBox1.Font.Size, textBox1.Font.Style); } private void radioButton2_CheckedChanged (object sender, EventArgs e) { if (radioButton2.Checked == true) textBox1.Font = new Font(华文新魏, textBox1.Font.Size, textBox1.Font.Style); } private void radioButton3_CheckedChanged (object sender, EventArgs e) { if (radioButton3.Checked == true) textBox1.Font = new Font(楷体_GB2312, textBox1.Font.Size, textBox1.Font.Sty