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图片轮播拓展 - ColinTreeSlideShow - App Inventor 2 拓展 - 清泛IT社区，为创新赋能！
...一个空的 水平滚动布局，将宽高设置好
（目前组件有个问题，在加入图片之后调整这个布局，图片不会跟随改变大小）如图（背景颜色可以先设置好）：
在添加列表项之前先初始化一下，调用传入一个参数：调用ColinTreeSlideSh...
再说WCF Data Contract KnownTypeAttribute - 更多技术 - 清泛网 - 专注IT技能提升
...简单的写个客户端来调用一下这个服务，但很快你会发现浏览器（客户端）返回给你了错误：
Server Error in '/' Application.
The underlying connection was closed: The connection was closed unexpectedly.
Description: An unhandled exception occurred during th...
再说WCF Data Contract KnownTypeAttribute - 更多技术 - 清泛网 - 专注IT技能提升
...简单的写个客户端来调用一下这个服务，但很快你会发现浏览器（客户端）返回给你了错误：
Server Error in '/' Application.
The underlying connection was closed: The connection was closed unexpectedly.
Description: An unhandled exception occurred during th...
再说WCF Data Contract KnownTypeAttribute - 更多技术 - 清泛网 - 专注IT技能提升
...简单的写个客户端来调用一下这个服务，但很快你会发现浏览器（客户端）返回给你了错误：
Server Error in '/' Application.
The underlying connection was closed: The connection was closed unexpectedly.
Description: An unhandled exception occurred during th...
再说WCF Data Contract KnownTypeAttribute - 更多技术 - 清泛网 - 专注IT技能提升
...简单的写个客户端来调用一下这个服务，但很快你会发现浏览器（客户端）返回给你了错误：
Server Error in '/' Application.
The underlying connection was closed: The connection was closed unexpectedly.
Description: An unhandled exception occurred during th...
再说WCF Data Contract KnownTypeAttribute - 更多技术 - 清泛网 - 专注IT技能提升
...简单的写个客户端来调用一下这个服务，但很快你会发现浏览器（客户端）返回给你了错误：
Server Error in '/' Application.
The underlying connection was closed: The connection was closed unexpectedly.
Description: An unhandled exception occurred during th...
再说WCF Data Contract KnownTypeAttribute - 更多技术 - 清泛网 - 专注IT技能提升
...简单的写个客户端来调用一下这个服务，但很快你会发现浏览器（客户端）返回给你了错误：
Server Error in '/' Application.
The underlying connection was closed: The connection was closed unexpectedly.
Description: An unhandled exception occurred during th...
再说WCF Data Contract KnownTypeAttribute - 更多技术 - 清泛网 - 专注IT技能提升
...简单的写个客户端来调用一下这个服务，但很快你会发现浏览器（客户端）返回给你了错误：
Server Error in '/' Application.
The underlying connection was closed: The connection was closed unexpectedly.
Description: An unhandled exception occurred during th...
再说WCF Data Contract KnownTypeAttribute - 更多技术 - 清泛网 - 专注IT技能提升
...简单的写个客户端来调用一下这个服务，但很快你会发现浏览器（客户端）返回给你了错误：
Server Error in '/' Application.
The underlying connection was closed: The connection was closed unexpectedly.
Description: An unhandled exception occurred during th...
再说WCF Data Contract KnownTypeAttribute - 更多技术 - 清泛网 - 专注IT技能提升
...简单的写个客户端来调用一下这个服务，但很快你会发现浏览器（客户端）返回给你了错误：
Server Error in '/' Application.
The underlying connection was closed: The connection was closed unexpectedly.
Description: An unhandled exception occurred during th...