The ASP.NET ReportViewer parameters area is immutable, thus using a custom UI is the approach for getting customizable parameters editors.
For example use your own controls, and once the user saves the selection update the viewer's Reportsource.Parameters
collection. The ReportSource.Parameters
collection is mapped by key to the wrapped report's ReportParameters
sender, EventArgs e)
var newValue = DropDown1.SelectedValue;
].Value = newValue;
Examples with the viewer are available in the local Html5Demo and MvcDemo projects.
I hope the provided information helps you.
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