如何從字符串讀取？

Question

我想了解如何根據用戶選擇的時間安排圖片。

這裏是代碼的問題：

private void startjob() 
{ 
    string theDate = DateTimePicker1.Value.ToString(); 
    DateTime dt = Convert.ToDateTime(date); 
    { 
     DateTime start = new DateTime(2009, 12, 9, 10, 0, 0); //How Do I make this to read the string that is converted from DateTimePicker instead of this? 
     DateTime end = new DateTime(2009, 12, 10, 12, 0, 0); //How Do I make this to read the string that is converted from DateTimePicker instead of this? 
     DateTime now = DateTime.Now; 
     if ((now > start) && (now < end)) 
     { 
     //match found 
     } 
    } 
} 

Answer 1

DateTimePicker.Value返回DateTime對象。您正試圖不必要地將字符串類型轉換爲字符串類型。

DateTime start = DateTimePickerStart.Value; 
DateTime end = DateTimePickerEnd.Value; 

Answer 2

假設你的控件被命名爲DateTimePicker1和DateTimePicker2：

private void startjob() 
{ 
    DateTime start = DateTimePicker1.Value; 
    DateTime end = DateTimePicker2.Value; 
    DateTime now = DateTime.Now; 
    if ((now > start) && (now < end)) 
    { 
    //match found 
    } 
} 

DateTimePicker.Value屬性是一個DateTime對象本身，因此您的代碼可以簡化，無需轉換爲字符串。