我正在使用一个带有用户定义表类型的表值参数，下面是我的代码。我正在尝试从数据表填充存储过程。
将过程[dbo].[tablename]@dt改为dbo.datatableastype readonly

AS
BEGIN
INSERT INTO dbo.[DataTableAsType]
    ([Column names]) --There are 89 column names
SELECT
([ColumnNames])
FROM @dt
END

Second Stored procedure
@totalRecords int OUTPUT
INSERT INTO dbo.tablename1 FROM dbo.tablename2
SELECT @totalRecords = COUNT(*) FROM dbo.[tableName2]

public void InsertDataTableAF2CSV(string ext)
    {

        DataTable tvp = new DataTable();
        string[] arr = new string[89] {"names go here"};

//添加89个列名1乘1 tvp.columns.add（new datacolumn（“column name”，typeof（string）））；

//populate datarows I currently have over 1,000 rows. 
        DataRow row;
        for (int i = 0; i <= arr.Length; i++)
        {
            row = tvp.NewRow();
            row["Column name"] = i;

            //I add all 89 column names = i then I add rows.
            tvp.Rows.Add(row);
        }
        //read the file name I entered              
        tvp= ReadFile(filename, " ", null);

        //Passing a Table-Valued Parameter to a Stored Procedure
        using (SqlConnection con = new SqlConnection(connection name))
        {
            connection.Open();
            //Execute the cmd
            // Configure the command and parameter. 
            SqlCommand cmd = new SqlCommand("dbo.storedprocedure", connection);
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.CommandTimeout = 5000;
            ///SqlParameter tvparam = cmd.Parameters.AddWithValue("@dt", tvp);
            // Create a DataTable with the modified rows.  
            DataTable addedCategories = tvp.GetChanges(DataRowState.Added);
            // these next lines are important to map the C# DataTable object to the correct SQL User Defined Type
            SqlParameter parameter = new SqlParameter("@dt", SqlDbType.Structured)
            {
                //TypeName = "dbo.DataTableAsType",
                TypeName = "dbo.importDataTable",
                Value = tvp
            };                                   
            cmd.ExecuteNonQuery();
            con.Close();
        }
    }