只需检查你的if语句..你实际上正在分配一个值..use ==而不是。

简单的错误。





希望它有所帮助!!

just check your if statement..you are actually assigning a value..use == instead.
simple mistake.


hope it helps!!

你需要将密钥转换为char并需要给==而不是=。



试试这个，

You need to cast the key to char and need to give == instead of =.

Try this,

if (e.KeyChar == (char)Keys.Enter)
{
//logic here

}

如果要比较相等性，请使用等于运算符 == 。

Use the equality operator == if you want to compare for equality.

private void txtRollNumber_KeyPress(object sender, KeyPressEventArgs e)
{
 if (e.KeyChar == (char)Keys.Enter)
  {
  //Do your operation here
  }
}

现在它应该可以工作！



编辑：添加（char）将其强制转换为char类型。

Now its should work!

Edit : Added (char) to cast it to char type.