我正在尝试创建按钮的行为。我检查了其他stackoverflow问题的解决方案。我不知道我在哪里弄错了。这是代码:
class StartButton : Button
{
public StartButton() : base()
{
this.Location = new Point(100, 100);
this.Visible = true;
this.Size = new Size(200, 50);
this.Click += StartButton_Click;
}
void StartButton_Click(object sender, RoutedEventArgs e)
{
}
}
Visual返回2个错误: 1)“ StartButton_click”没有重载匹配委托“ EventHandler” 2)找不到类型或名称空间名称“ RoutedEventArgs”(您是否缺少using指令或程序集引用?)
任何解决方案我都会感激
答案 0 :(得分:1)
此:
internal class User
{
private readonly string _value;
internal User([NotNull] string name, [CanBeNull] string value)
{
_value = value;
}
public bool Exists => !(_value is null);
public async Task CopyToAsync(Stream stream)
{
if (Exists)
{
// ReSharper disable once AssignNullToNotNullAttribute - '_value' won't be null here
using (var valueStream = _value.ToStreamReader())
{
await valueStream.BaseStream.CopyToAsync(stream);
}
}
}
}
应为:
void StartButton_Click(object sender, RoutedEventArgs e)
{
}
只需将void StartButton_Click(object sender, EventArgs e)
{
}
更改为RoutedEventArgs