Hi,
If you are using Report Builder 3.0 , then you follow the below steps
1) Open your Report Builder 3.0 and then add a DataSource.
2) After that create a DataSet, for this right click on DataSet tab and then select new dataset option then it's showing one pop up box here you choose your datasource name and select your query type is "stored Procedure" then below of that it's displaying the all SP's you prepared in previously , please select your SP in that and then click on OK button.
3) After that in right hand side you choose the option Parameters , then expand that parameters tab here it's automatically displayed the parameters whatever your create in your SP.
In your coding wise you call that parameters using this lines of code
string ReportPath = "Report path";
string ReportParameters_XML ="<Parameters>" +
"<StaticParam Name='DCNO' Value='" + DCNo + "' Type='Varchar' />" +
"</Parameters>";