问题
I am trying to get a parameter drop-down onto my report in Visual Studio 2015. It shows up fine on the design view, here i have populated it from another data set containing a unique list of one of the columns:
But when i go to the Preview tab, the parameters area is empty..
What am i doing wrong?
回答1:
This is not the first question about this issue. Here is another one. I cannot say why this happens, and I have not been able to reproduce it either. As I mentioned in the other question, if I see it again I may submit a bug report on it, if I can reproduce it consistently.
The solution/fix to the issue was to close Visual Studio and restart it. Afterward, the parameters worked as expected. I am sure we can all agree this isn't ideal, but it is a work around.
More to come if I find anything!
来源：https://stackoverflow.com/questions/38568734/using-parameters-in-visual-studio-2015-reporting-services