Type.Missing

c#里没有默认参数,

如果要和vb,c++交互的话,

要用Type.Missing来补空位,不可以用null。

曾经调用office的com,一个函数里用了40个Type.Missing,无语啊 

报错了 ❌ 解析失败: 30 validation errors for GraphData relationships -> 0 -> from_entity field required (type=value_error.missing) relationships -> 0 -> rel_type field required (type=value_error.missing) relationships -> 0 -> to_entity field required (type=value_error.missing) relationships -> 1 -> from_entity field required (type=value_error.missing) relationships -> 1 -> rel_type field required (type=value_error.missing) relationships -> 1 -> to_entity field required (type=value_error.missing) relationships -> 2 -> from_entity field required (type=value_error.missing) relationships -> 2 -> rel_type field required (type=value_error.missing) relationships -> 2 -> to_entity field required (type=value_error.missing) relationships -> 3 -> from_entity field required (type=value_error.missing) relationships -> 3 -> rel_type field required (type=value_error.missing) relationships -> 3 -> to_entity field required (type=value_error.missing) relationships -> 4 -> from_entity field required (type=value_error.missing) relationships -> 4 -> rel_type field required (type=value_error.missing) relationships -> 4 -> to_entity field required (type=value_error.missing) relationships -> 5 -> from_entity field required (type=value_error.missing) relationships -> 5 -> rel_type field required (type=value_error.missing) relationships -> 5 -> to_entity field required (type=value_error.missing) relationships -> 6 -> from_entity field required (type=value_error.missing) relationships -> 6 -> rel_type field required (type=value_error.missing) relationships -> 6 -> to_entity field required (type=value_error.missing) relationships -> 7 -> from_entity field required (type=value_error.missing) relationships -> 7 -> rel_type field required (type=value_error.missing) relationships -> 7 -> to_entity field required (type=value_error.missing) relationships -> 8 -> from_entity field required (type=value_error.missing) relationships -> 8 -> rel_type field required (type=value_error.missing) relationships -> 8 -> to_entity field required (type=value_error.missing) relationships -> 9 -> from_entity field required (type=value_error.missing) relationships -> 9 -> rel_type field required (type=value_error.missing) relationships -> 9 -> to_entity field required (type=value_error.missing)
最新发布
03-27
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