How to Pass Multiple Values to a Multi-Select Parameter in SSRS via Web Query String?

Passing Multiple Selections to SSRS Multi-Select Parameters via Web Query String

Reports built using SQL Server Reporting Services (SSRS) often incorporate multi-select parameters, enabling users to choose multiple options from a predefined list. However, transmitting these multiple selections via a web query string requires a specific approach.

Challenge: Effectively passing multiple values to a multi-select parameter within an SSRS report using a web query string.

Solution:

The solution involves a two-part process: configuring the SSRS report and correctly structuring the query string.

SSRS Report Configuration:

1. Access the "Parameters" section within your report's query definition.
2. Define the parameter's value using the following expression:

<code>=Join(Parameters!YOUR_PARAMETER_NAME.Value,",")</code>

Remember to replace "YOUR_PARAMETER_NAME" with the exact name of your multi-select parameter. This expression concatenates the selected values, separating them with commas.

Query Modification:

1. In your SQL query, reference the parameter using the IN operator:

<code class="language-sql">WHERE yourColumn IN (@YOUR_PARAMETER_NAME)</code>

This ensures that the query correctly interprets the comma-separated string from the parameter.

Illustrative Example:

Let's say you have a parameter named "ProductCategories" allowing multiple selections. The SSRS parameter value expression would be:

<code>=Join(Parameters!ProductCategories.Value,",")</code>

The corresponding SQL query would then be:

<code class="language-sql">WHERE ProductCategory IN (@ProductCategories)</code>

This setup allows the web query string to successfully pass multiple values, enabling the report to filter data based on the user's selections.

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