foo类可以设计,但不是文件错误中的第一个类 [英] The class foo can be designed, but is not the first class in the file error
问题描述
我有这个
类 foo 可以设计,但不是文件中的第一个类
The class foo can be designed, but is not the first class in the file
在我的 C# 文件中添加从 TextBox 派生的 foo 类后出错.怎么传啊,好烦.
error after adding foo class derived from TextBox in my C# file. How can I pass it, it's very annoying.
我想在我的文件中有多个类.我想要一些从接受特定类型输入的 TextBox 派生的类.我没有使用设计器.
I want to have multiple classes in my file. I want to have some classes derived from TextBox that accept specific types of input. I'm not using the designer.
编辑 2:
class NumericTextBox : TextBox
{
protected override void OnTextChanged(EventArgs e)
{
...
}
}
推荐答案
您的文件中必须有多个类.将您的类在文件中向上移动,使其成为该文件中的第一个类
You must have more than one classes in your file. Move your class up in the file so that it can be the first class in that file
Visual Studio 要求负责创建文件的类位于该文件的顶部或第一类
Visual Studio requires class that was responsible for creation of file to be on top or first class of that file
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