ODP.NET如何将字符串数组传递给Oracle存储过程？

Question

关于这个问题有很多问题和confusingdocs，但迄今为止没有运气。

我有以下的PL/SQL存储过程;

PROCEDURE PS_test(
    Liste1 Listcar, 
    Liste2 Listcar, 
    P_CURS_MESSAGE out CURSOR_REF_TYP 
) 

凡类型Listcar如下：

TYPE Listcar IS VARRAY（100）VARCHAR2（50）;

这里是我想到目前为止：

string[] list = { "name1", "name1" }; 

OracleParameter oParam = (OracleParameter)myOracleCommand.CreateParameter(); 
oParam.ParameterName = "Liste1"; 
oParam.UdtTypeName = "LISTCAR"; 
oParam.Value = list; 
oParam.Direction = ParameterDirection.Input; 
myOracleCommand.Parameters.Add(oParam); 

随着对价值分配以下错误：

Value does not fall within the expected range. 

试图利用类型varchr2，设置ArrayBindSize等目前为止，但没有运气。

我猜接口IOracleArrayTypeFactory可能在某处发挥作用，但是怎么做？

Answer 1

我没有在ODP.NET中使用udtType功能，所以我不知道如何实现你的目标。但是，要传递一个字符串数组，你不需要它。

与您附加的文档一样，您需要创建一个包含存储过程的包，并将关联数组（不是VARRAY）作为输入参数。

例如：

-- Create the table 
CREATE TABLE TBLTEST (testID NUMBER, name VARCHAR2(50)); 

CREATE SEQUENCE seq_test 
    MINVALUE 1 
    START WITH 1 
    INCREMENT BY 1 
    NOCACHE; 

CREATE OR REPLACE PACKAGE pkgTestArrayBinding 
AS 
    -- Define an local scope associative array type called T_ASSOCIATIVE_ARRAY and make it as the type of input parameter 
    TYPE T_ASSOCIATIVE_ARRAY IS TABLE OF VARCHAR(50) INDEX BY PLS_INTEGER; 
    PROCEDURE TestArrayBinding(
     Param1 IN T_ASSOCIATIVE_ARRAY, 
     Param2 IN T_ASSOCIATIVE_ARRAY); 
END pkgTestArrayBinding; 
/

CREATE OR REPLACE PACKAGE BODY pkgTestArrayBinding 
AS 
    PROCEDURE TestArrayBinding(
     Param1 IN T_ASSOCIATIVE_ARRAY, 
     Param2 IN T_ASSOCIATIVE_ARRAY) 
    AS 
    BEGIN 
     -- for all loop to insert them in a batch 
     FORALL indx IN 1..Param1.COUNT 
      INSERT INTO tblTest VALUES(seq_test.nextval, Param1(indx)); 

     FORALL indx IN 1..Param2.COUNT 
      INSERT INTO tblTest VALUES(seq_test.nextval, Param2(indx)); 
    END TestArrayBinding; 
END pkgTestArrayBinding; 
/

现在，运行这段代码，把你自己的连接字符串。

namespace Con1 
{ 
    using System; 
    using System.Data; 

    using Oracle.DataAccess.Client; 

    /// <summary> 
    /// The program. 
    /// </summary> 
    internal class Program 
    { 
     #region Methods 

     /// <summary> 
     /// The main. 
     /// </summary> 
     private static void Main() 
     { 
      var con = new OracleConnection { ConnectionString = "User Id=usr;Password=pass;Data Source=XE" }; 

      con.Open(); 
      Console.WriteLine("Connected to Oracle" + con.ServerVersion); 

      // create command to run your package 
      var cmd = new OracleCommand("BEGIN pkgTestArrayBinding.TestArrayBinding(:Param1, :Param2); END;", con); 

      var param1 = cmd.Parameters.Add("Param1", OracleDbType.Varchar2); 
      var param2 = cmd.Parameters.Add("Param2", OracleDbType.Varchar2); 

      param1.Direction = ParameterDirection.Input; 
      param2.Direction = ParameterDirection.Input; 

      // Specify that we are binding PL/SQL Associative Array 
      param1.CollectionType = OracleCollectionType.PLSQLAssociativeArray; 
      param2.CollectionType = OracleCollectionType.PLSQLAssociativeArray; 

      // Setup the values for PL/SQL Associative Array 
      param1.Value = new[] { "First Element", "Second Element ", "Third Element_" }; 
      param2.Value = new[] { "Fourth Element", "Fifth Element ", "Sixth Element " }; 

      // Specify the maximum number of elements in the PL/SQL Associative Array 
      // this should be your array size of your parameter Value. 
      param1.Size = 3; 
      param2.Size = 3; 

      // Setup the ArrayBindSize for each elment in the array, 
      // it should be bigger than the original length of element to avoid truncation 
      param1.ArrayBindSize = new[] { 13, 14, 13 }; 

      // Setup the ArrayBindSize for Param2 
      param2.ArrayBindSize = new[] { 20, 20, 20 }; 

      // execute the cmd 
      cmd.ExecuteNonQuery(); 

      // I am lazy to query the database table here, but you should get you data now. 
      // watch what happened to element "Third Element_" 

      // Close and Dispose OracleConnection object 
      con.Close(); 
      con.Dispose(); 
      Console.WriteLine("Disconnected"); 
     } 

     #endregion 
    } 
}