SSRS (SQL2014) - hide a chart when a multi-value parameter is selected

Question

On one SSRS report, I have a parameter called "Machine". User can select one or several machines in the list.

When only one machine is selected, I want to show a chart. When several machines are selected, the data shown on the chart makes no sense, so I want to hide the chart.

Do you know how can I detect that user select only one or several machines? Which expression could I use in the "visibility" parameter of the chart?

Thanks in advance.

Answer 1

In the visibility property of the chart, use the expression:

=(Parameters!ParameterName.Count > 1)

This will hide the chart when more than one value is selected.

Answer 2

在表的可见性属性上（右键单击表的空白=> properties =>可见性），添加以下代码=IIF(Parameters!ParameterName.Count = 1, false, true)是您的多值参数