wpf 该字符串未被识别为有效的 DateTime。有一个从索引 0 开始的未知单词。标签到字符串
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The string was not recognized as a valid DateTime. There is an unknown word starting at index 0. label to string
提问by user2122032
What does this error mean? I am trying to retrieve the date from a label and display it on a wpf form.
这个错误是什么意思？我正在尝试从标签中检索日期并将其显示在 wpf 表单上。
printResident.DateOfBirth = DateTime.Parse( lblDOB.ToString() );
This method calls the retrieve method that executes the sql select from the database to reteive the information onto the form.+
该方法调用retrieve 方法，该方法从数据库中执行sql select 以将信息检索到表单上。+
ResidentData.Retrieve(printResident.ResidentID);
回答by Gjeltema
As a guess, you're using a Labeldirectly. Try doing lblDOB.Content.ToString()instead.
作为猜测，您正在使用Label直接。尝试做lblDOB.Content.ToString()。
回答by vivat pisces
Assuming lblDOBis a label, you'll need to use:
假设lblDOB是一个标签，你需要使用：
lblDOB.Content.ToString();
Initially, you were using lblDOB.ToString(), which returns a string representation of your label (probably something like System.Windows.Controls.Label, followed by the content of your label), not something that DateTime.Parsewould be able to work with.
最初，您使用的是lblDOB.ToString()，它返回标签的字符串表示（可能类似于 System.Windows.Controls.Label，后跟标签的内容），而不是DateTime.Parse可以使用的内容。
Now you're trying to use lblDOB.Content.ToString(), which is the correct way, but you're getting a null reference exception. Place a breakpoint on the statement that loads the date from the database into your label and make sure it's working, because it's complaining that lblDOB.Contenthas no value.
现在您正在尝试使用lblDOB.Content.ToString()，这是正确的方法，但是您收到了空引用异常。在将日期从数据库加载到标签的语句上放置一个断点，并确保它正常工作，因为它在抱怨lblDOB.Content没有价值。
回答by Vishal
May be this Helps:-
可能是这个帮助：-
DateTime dt = DateTime.Parse("01/01/0001 00:00:00");
label1.Content = dt.ToString();
