Question

我们如何获得在Javascript中引发异常的方法？

例如：

<StackPanel Name="spItemDisplay"  HorizontalAlignment="Stretch" Margin="0,10,0,0" Grid.Row="3" VerticalAlignment="Stretch" Orientation="Horizontal" >
     <ScrollViewer HorizontalAlignment="Right" >
       <DataGrid HorizontalAlignment="Center"  Width="1096" Name="dgItemDisplay" AutoGenerateColumns="False" Height="auto" >
            <DataGrid.Columns>
                <DataGridTextColumn  IsReadOnly="True" x:Name="dgItemCode" Width="300" Header="Barcode" Binding="{Binding ItemCode}" />
                <DataGridTextColumn IsReadOnly="True" x:Name="dgItemName" Width="500" Header="Item Name" Binding="{Binding ItemName}" />
                <DataGridTextColumn IsReadOnly="True" x:Name="dgItemPrice" Width="250" Header="Item Price" Binding="{Binding ItemPrice, StringFormat=RM {0}}" />
               </DataGrid.Columns>
        <DataGrid.RowDetailsTemplate >
         <DataTemplate>
            <StackPanel Name="spItemDisplay2" HorizontalAlignment="Stretch" Background="White"  >
                <Grid Margin="0,10"  >
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="300" />
                        <ColumnDefinition Width="300" />
                        <ColumnDefinition Width="100" />
                        <ColumnDefinition Width="100" />
                        <ColumnDefinition Width="*" />
                    </Grid.ColumnDefinitions>
                    <Grid.RowDefinitions>
                         <RowDefinition Height="30" />
                         <RowDefinition Height="30" />
                         <RowDefinition Height="30" />
                         <RowDefinition Height="30" />
                      </Grid.RowDefinitions>
                         <TextBlock Text="Quantity: " FontWeight="Bold" Grid.Column="2" Grid.Row="0"/>
                         <TextBox KeyDown="TxtQty_KeyDown" x:Name="txtQty" Text="{Binding Quantity, UpdateSourceTrigger=PropertyChanged}" Grid.Column="3" Grid.Row="0"/>
                         <TextBlock Text="Discount: " FontWeight="Bold" Grid.Column="2" Grid.Row="1"/>
                         <TextBox KeyDown="TxtDisc_KeyDown" x:Name="txtDisc" Text="{Binding Discount, UpdateSourceTrigger=PropertyChanged}" Grid.Column="3" Grid.Row="1"/>
                         <Button Content="Remove Item"  HorizontalAlignment="Left" VerticalAlignment="Stretch" Width="95" Click="btnRemoveItem_Click" Grid.Column="3" FontSize="10" Grid.Row="3"/>
                </Grid>
            </StackPanel>
           </DataTemplate>
        </DataGrid.RowDetailsTemplate>
      </DataGrid>
    </ScrollViewer>
</StackPanel>

尝试：

function method()
try { throw new Error('oh oh')}
catch(e) { e.stack... how to get the method ...}

但是它显示为console.log("The method is: " + e.method);。

Answer 1

.stack属性将包含显示堆栈跟踪的字符串-第一行将引发错误，第二行将列出包含函数名称（如果有）以及引发错误的行/列号：

function method() {
  try {
    throw new Error('oh oh')
  } catch (e) {
    console.dir(e.stack.split('\n')[1]);
  }
}
method();

Answer 2

此库可能满足您的需求：http://www.eriwen.com/javascript/stacktrace-update/

Answer 3

您可以使用arguments.callee.name

function method() {
  try {
    throw new Error('oh oh')
  } catch (e) {
    console.log(arguments.callee.name)
  }
}

method();

获取引发异常的方法？

3 个答案: