SQLCLR存储过程无法安装

Question

I have created a stored procedure in Visual Studio (VS). When I attempt to install the procedure after successfully creating the assembly I get the error:

CREATE PROCEDURE for sp_GetDistanceAndTime failed because T-SQL and CLR types for parameter "@Profile" do not match.

How do I get this to install? Are my parameters incorrect?

C# code:

public partial class StoredProcedures
{
    [Microsoft.SqlServer.Server.SqlProcedure]
    public static void SqlStoredProcedure1(SqlString Profile, SqlString StartPosition,
           SqlString Destination)
    {
        try
        {           
            SqlPipe sqlPipe = SqlContext.Pipe;
            string result;
            result = PTVRequest.InvokeService(Profile.ToString(),
                    StartPosition.ToString(), Destination.ToString());

            SqlContext.Pipe.Send(result);
        }
        catch (Exception ex)
        {
            SqlContext.Pipe.Send(ex.Message);
        }

    }
}

SQL code:

Create Procedure sp_GetDistanceAndTime(@Profile text, @StartPosition text,
 @Destination text)
AS 
External NAME GetPvt.StoredProcedures.SqlStoredProcedure1
go

Answer 1

1. Never use the TEXT , NTEXT , or IMAGE datatypes. Those have been deprecated for 13 years now, starting with the release of SQL Server 2005 which introduced the MAX datatypes to replace those old blob types.
2. The SQLCLR API only handles Unicode strings (UTF-16LE) and not 8-bit encodings. So, you cannot use CHAR(1 - 8000) , VARCHAR(1 - 8000) , or VARCHAR(MAX) . And I don't think it likes NCHAR either. Your choices are: NCHAR(1 - 4000) or NVARCHAR(MAX) . Both of those map to both SqlString and SqlChars .
3. SqlContext.Pipe.Send(string) is equivalent to using PRINT in T-SQL. It is just a message that shows up in the "Messages" tab in SSMS. It is neither a return value nor an OUTPUT parameter.

Answer 2

A quick example (fix sizes to your case, etc):

public static void SqlStoredProcedure1([SqlFacet(MaxSize=100)] string Profile,
[SqlFacet(MaxSize=200)] string StartPosition,
[SqlFacet(MaxSize=100)] string Destination)

And:

CREATE PROCEDURE sp_GetDistanceAndTime
   @Profile nVARCHAR(100), @StartPosition nVARCHAR(200), @Destination nVARCHAR(100)
   AS EXTERNAL NAME GetPvt.StoredProcedures.SqlStoredProcedure1

See Mapping CLR Parameter Data for details.