Passing DataTable to stored procedure as an argument

Question

I have a data table created in C#.

DataTable dt = new DataTable();
dt.Columns.Add(\"Name\", typeof(string));
dt.Columns.Add(\"Age\", typeof(int));

dt.Rows.A         


        

Answer 1

You can change the stored procedure to accept a table valued parameter as an input. First however, you will need to create a user defined table TYPE which matches the structure of the C# DataTable:

CREATE TYPE dbo.PersonType AS TABLE
(
    Name NVARCHAR(50), -- match the length of SomeTable.Column1
    Age INT
);

Adjust your SPROC:

CREATE PROCEDURE dbo.InsertPerson
    @Person dbo.PersonType READONLY
AS
BEGIN
  INSERT INTO SomeTable(Column1, Column2) 
     SELECT p.Name, p.Age
     FROM @Person p;
END

In C#, when you bind the datatable to the PROC parameter, you need to specify the parameter as:

parameter.SqlDbType = SqlDbType.Structured;
parameter.TypeName = "dbo.PersonType";

See also the example here Passing a Table-Valued Parameter to a Stored Procedure