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Parameter Validation on web application is almost must all the time.
We recently developed a report which had Days Input Parameter in it.
Now to display proper error message to the end user we can take the following approach. (From integer type) Add a text box to report to show the error message, have following expression.However, although SQL Server Reporting Service (SSRS) is a web app but as a default it does not have parameter (user input) validation.We have to write a Code at Report Properties Menu and implement it on Report Parameter.When the conditions evaluates to "Yes", the report is shown.The condition was included in a expression of a text box, and its evaluated when a press on View Report.