Displaying data from stored procedure into textbox fields based on user input.

Question

I have a stored procedure that is selecting data from a table called "Vendor" in my database.  The data that is being returned are vendor names, vendor addresses, vendor Id's, etc...In my stored proc, I have one parameter that allows
the user to enter a vendor name and then return all the data for that specific vendor.  The report that I'm building is going to look like a basic form with a bunch of textboxes on the screen labeled Vendor Address, Vendor Id, Vendor City, Vendor State,
etc...In the report I'm trying to build, the user will enter in a vendor name and then it will return all of the vendor's data based on what the user searches for.  However, the report will only return ONE vendor's data at a time. 
The problem is that some of the data in the database has very similiar vendor names, but different vendor addresses, vendor Id's, etc...In some instances the vendor name is actually
exactly the same, but the vendor address, vendor city, vendor Id, is all different.  So what I did was added another parameter in my report that shows a drop down list of vendor names based on the wildcard search the user just did and
allows the user to select the exact vendor name that he/she is looking for based on what they searched.  The problem I'm having is that I don't know what expression I need to put in each one of my textboxes to retrieve the correct data from
the vendor table that the user selects from the drop down list.  So what I want to do is return the exact data from the vendor table based on the selection that the user makes from that drop down list.  It's like I somehow have to compare the
drop down list parameter directly to the dataset but I don't know what expression needs to go in the textbox.  I've tried...=First(Fields!VendorName.Value, "DataSet1").EqualsParameters!DropDownList.Value(0) but I keep getting an error message.
--Here is an example of the kind of thing the user might search for...when the user searches the word "sprint" it returns three different vendor names to the drop down list.
1. sprint
2. sprint
3. sprint co
Each one of those three vendor names has a different vendor address, vendor city, vendor ID, etc...but the vendor names are extremely similar and in some cases
exactly the same. In my report now I can't get the textboxes to return the correct data based on what the user selects.  Any advice at all is greatly appreciated.
P.S. I didn't even know what SQL Server was a month ago and had zero knowledge of SSRS at all.  I've learned a lot recently, but if you could explain a solution in the easiest way possible I would appreciate it. Thanks!

Answer 1

Hi Jrcowles,
If I understand you correctly, you wnat to list all the Vendor Name which like the user typed Vendor Name on a drop-down list, right? If in this case, we can use a cascading parameters to achieve your requirement. I have tested it on my local environment,
the steps below are for you reference.
Create an other stored procedure using the query below.
CREATE PROCEDURE GetVendorName
@VendorName NVARCHAR(50)
AS BEGIN
exec( 'SELECT * FROM Vendor WHERE VendorName LIKE ''%'+@VendorName+'%''')
END
Create another dataset DataSet2 and using the new created procedure.
Create another parameter VendorName2 and check "Allow Multiple Values" for this parameter.
On the Available Values tab, check "Get values from a query". Select corresponding dataset and field.
On the Default Values tab, check "Get values from a query". Select corresponding dataset and field.
The screenshots below are for you reference.
Reference
http://technet.microsoft.com/en-us/library/aa337169(v=sql.100).aspx
http://www.msbiguide.com/2012/02/adding-cascading-parameters-to-ssrs-reports/
Regards,
Charlie Liao
TechNet Community Support