Visual Studio 对于 Mac 将不会创建按钮单击处理程序

Question

我看到了这个但在我的例子中，当我输入 Clicked="" 并选择创建处理程序的选项时，我看到了这个：

它不允许我创建处理程序。

代码片段：

<RelativeLayout HorizontalOptions="FillAndExpand">
    <Button x:Name="btnAddElder" Text="Add" RelativeLayout.XConstraint="{ConstraintExpression Type=RelativeToParent, Property=Width, Factor=.0000, Constant=0}"
            RelativeLayout.WidthConstraint="{ConstraintExpression Type=RelativeToParent, Property=Width, Factor=.3333, Constant=0}" />
    <Button x:Name="btnEditElder" Text="Edit" RelativeLayout.XConstraint="{ConstraintExpression Type=RelativeToParent, Property=Width, Factor=.3333, Constant=0}"
            RelativeLayout.WidthConstraint="{ConstraintExpression Type=RelativeToParent, Property=Width,Factor=.3333,Constant=0}" />
    <Button x:Name="btnDeleteElder" Text="Delete" RelativeLayout.XConstraint="{ConstraintExpression Type=RelativeToParent, Property=Width, Factor=.6666, Constant=0}"
            RelativeLayout.WidthConstraint="{ConstraintExpression Type=RelativeToParent, Property=Width, Factor=.3333, Constant=0}" />
</RelativeLayout>

感谢您的建议。

Answer 1

问题的原因似乎是我命名 Button 元素的方式。都是小写字母开头的。

当我使用以大写字母开头的名称时，例如：

 <RelativeLayout HorizontalOptions="FillAndExpand">
        <Button
            x:Name="AddPublisherButton"
            Padding="10,10,10,10"
            RelativeLayout.WidthConstraint="{ConstraintExpression Constant=0,
                                                                  Factor=.3333,
                                                                  Property=Width,
                                                                  Type=RelativeToParent}"
            RelativeLayout.XConstraint="{ConstraintExpression Constant=0,
                                                              Factor=.0000,
                                                              Property=Width,
                                                              Type=RelativeToParent}"
            Text="Add"
            Clicked="AddPublisherButton_Clicked"/>
        <Button
            x:Name="EditPublisherButton"
            Padding="10,10,10,10"
            RelativeLayout.WidthConstraint="{ConstraintExpression Constant=0,
                                                                  Factor=.3333,
                                                                  Property=Width,
                                                                  Type=RelativeToParent}"
            RelativeLayout.XConstraint="{ConstraintExpression Constant=0,
                                                              Factor=.3333,
                                                              Property=Width,
                                                              Type=RelativeToParent}"
            Text="Edit"
            Clicked="EditPublisherButton_Clicked"/>
        <Button
            x:Name="DeletePublisherButton"
            Padding="10,10,10,10"
            RelativeLayout.WidthConstraint="{ConstraintExpression Constant=0,
                                                                  Factor=.3333,
                                                                  Property=Width,
                                                                  Type=RelativeToParent}"
            RelativeLayout.XConstraint="{ConstraintExpression Constant=0,
                                                              Factor=.6666,
                                                              Property=Width,
                                                              Type=RelativeToParent}"
            Text="Delete"
            Clicked="DeletePublisherButton_Clicked"/>
    </RelativeLayout>

然后它确实创建了处理程序！参见：

void AddElderButton_Clicked(System.Object sender, System.EventArgs e)
{
}

void EditElderButton_Clicked(System.Object sender, System.EventArgs e)
{
}
void DeleteElderButton_Clicked(System.Object sender, System.EventArgs e)
{
}

void AddPublisherButton_Clicked(System.Object sender, System.EventArgs e)
{
}

void EditPublisherButton_Clicked(System.Object sender, System.EventArgs e)
{
}

void DeletePublisherButton_Clicked(System.Object sender, System.EventArgs e)
{
}

Visual Studio 对于 Mac 将不会创建按钮单击处理程序

Visual Studio for Mac will not create a button click handler

macos

xaml

button

xamarin.forms

visual-studio-mac