用C# 编写一个计算时间间隔日期的小程序

1、1.打开软件，新建项目，选择窗体应用程序，并命名等操作，点击确定，如图：

2、2.在窗体中插入控件，标签、日期、文本框、按钮等,并修改属性，如图：

3、3.点击计算按钮的操作代码，如图：

4、4.写好后，点击运行按钮，运行程序，如图：

5、5.测试没问题后，再进行最后的窗体属性设置，背景色、名称、等，如图：

6、6.设置程序的图标，在项目右击--属性中设置，如图：

7、7.完成程序编写，程序便可使用，在项目文件夹中找到exe文件，复制就可使用，如图：

8、8.程序的主要代码，如下：                                                                            

 private void button1_Click(object sender, EventArgs e)                                                  {                                                                                                                                         listBox1.Items.Clear();//每次点击计算时先将结果listBox1清空                               var aa = this.dateTimePicker1.Value; //取得开始日期                                            var aa2 = this.dateTimePicker2.Value;//取得结束日期                                        var days1 = textBox4.Text; //取得间隔天数 为字符串                                   int days;//定义间隔天数 整型                                                                                   //判断输入的天数是否为整数，是赋给days,不是提示并返回                                  if (int.TryParse(days1, out days) == false)                                                                      {                                                                                                                                             MessageBox.Show("请输入数值！");                                                                         return;                                                                                                                             }                                                                                                                                      //进行循环计算                                                                                                           for (int i = 0; i < 10000; i++)                                                                                          {                                                                                                                                            //开始日期加间隔天数                                                                                                     this.dateTimePicker1.Value = dateTimePicker1.Value.AddDays(days);                     aa = this.dateTimePicker1.Value;                                                                                      listBox1.Items.Add(aa);//添加到列表中                                                        

                //判断是否大于开始日期，当大于时结束循环跳出，否则继续                                  if (aa > aa2)                                                                                                                        {                                                                                                                                               break;                                                                                                                            }                                                                                                                                }                                                                                                                                     }