如何从存储过程插入表（用户定义类型）并传递给C＃

Question

How insert into table(User-defined type) from Stored procedure and passing to c#

Table structure:

CREATE TABLE [dbo].[RegisterChoiceUserInitial](
    [RegisterChoiceUserInitialID] [int] IDENTITY(1,1) NOT NULL,
    [UserId] [uniqueidentifier] NOT NULL,
    [RegisterChoiceUserInitialJob] [nvarchar](50) NULL,
    [RegisterChoiceUserInitialOrganization] [nvarchar](50) NULL,
    [RegisterChoiceUserInitialUnit] [nvarchar](50) NULL,
    [RegisterChoiceUserInitialMembershipType] [nvarchar](50) NULL,
    [RegisterChoiceUserInitialStart] [nvarchar](10) NULL,
    [RegisterChoiceUserInitialEnd] [nvarchar](10) NULL,
 CONSTRAINT [PK_RegisterChoiceUserInitial] PRIMARY KEY CLUSTERED 
(
    [RegisterChoiceUserInitialID] ASC
)

User-defined type:

CREATE TYPE [dbo].[TableTypeInitial] AS TABLE(
    [ID] [int] NULL,
    [InitialJob] [nvarchar](50) NULL,
    [InitialOrganization] [nvarchar](50) NULL,
    [InitialUnit] [nvarchar](50) NULL,
    [InitialMembershipType] [nvarchar](50) NULL,
    [InitialMembershipStart] [nvarchar](10) NULL,
    [InitialMembershipEnd] [nvarchar](10) NULL
)

Answer 1

You should make serialize/deserialize for your type, and write string of serialized object to SQL, then when you need to get it, you read string from table and deserialized it to your type.

EDIT

about serialize you can read here csharp-tutorial-serialize-objects-to-a-file They use serialize to file, but convert it to string will not be hard

Answer 2

There is no way to return a datatable as output param. The only way to return table result from xp to c# is either using xml param or in following way.

sql scripts :

create procedure sp_returnTable
    body of procedure
    **select * from RegisterChoiceUserInitial**
end

sample c# code:

   string connString = "<your connection string>";
    string sql = "name of your sp";

SqlConnection conn = new SqlConnection(connString);

try {
   SqlDataAdapter da = new SqlDataAdapter();
   da.SelectCommand = new SqlCommand(sql, conn);
   da.SelectCommand.CommandType = CommandType.StoredProcedure;

   DataSet ds = new DataSet();   
   da.Fill(ds, "result_name");

   DataTable dt = ds.Tables["result_name"];

   foreach (DataRow row in dt.Rows) {
               //manipulate your data
   }

} catch(Exception e) {
   Console.WriteLine("Error: " + e);
} finally {
   conn.Close();
}