c# - 如何获取存储过程和C#代码中的总记录？

Question

我正在使用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。

更改过程 [dbo].[TableName] @dt AS 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"};

//1×1添加89个列名 tvp.Columns.Add(new DataColumn("列名", 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();
        }
    }

Answer 1

您的 ACCOUNT 表和 CUSTOMER_1 具有引发问题的循环外键引用。类似的问题已经描述过here和 here 。

我建议你制作一个简化的数据库结构。据我所知，您不需要 ACCOUNT 表中的 CUST_NUM 列，您尝试使用 CUSTOMER_1 表中的外键。尽量保持数据库表结构尽可能简单，如我上面提供的第二个链接中所建议的那样。