CLOB 필드를 C# 변수로 읽는 방법?

Question

가능한 중복은 :
Why Do I get OutOfRange Exception in GetOrdinal Function of this CLOB field?

I need to read a CLOB field from an ORACLE table int a C# variable of type String. Does anyone know how to accomplish this task? 

이것은 내가 짓을하지만 필드의 GetOrdinal을 계산할 때 내가 IndexOutofRange을 얻고 것입니다. 미리 감사드립니다.

public void ReadFunction(string FName, out string fContent) 
{ 
    OracleCommand command = _connection.CreateCommand(); 
    OracleTransaction transaction = _connection.BeginTransaction(); 
    command.Transaction = transaction; 
    command.CommandText = "SELECT TO_CLOB(TO_NCLOB(FUNCTION_SCRIPT)) FROM IS_FUNCTION where FNAME=:fName "; 
    command.Parameters.Add("FName", OracleType.NVarChar).Value = FName; 
    OracleDataReader odr = command.ExecuteReader(); 
    int temp = odr.GetOrdinal("FUNCTION_SCRIPT"); 
    OracleLob myLob = odr.GetOracleLob(temp); 
    fContent = (String)myLob.Value; 
    odr.close(); 
} 

Answer 1

이 코드는 Blob을 가져 오는 코드이므로 필요에 따라 astring로 캐스팅해야합니다. 필요한 형식을 모르겠습니다.

// create and open connection 
    // change for your environment 
    string connStr = "User Id=pm; Password=pm; Data Source=orcllx; Pooling=false"; 
    OracleConnection con = new OracleConnection(connStr); 
    try 
    { 
    con.Open(); 
    } 
    catch (OracleException ex) 
    { 
    MessageBox.Show(ex.Message); 
    } 

    // statement to get a blob 
    string sql = "select ad_composite from print_media where product_id=3106 and 
       ad_id=13001"; 

    // create command object 
    // InitialLOBFetchSize 
    // defaults to 0 
    OracleCommand cmd = new OracleCommand(sql, con); 

    cmd.InitialLOBFetchSize = 8192; 

    // create a datareader 
    OracleDataReader dr = cmd.ExecuteReader(); 

    // read the single row result 
    try 
    { 
    dr.Read(); 
    } 
    catch (OracleException ex) 
    { 
    MessageBox.Show(ex.Message); 
    } 

    // use typed accessor to retrieve the blob 
    OracleBlob blob = dr.GetOracleBlob(0); 

    // create a memory stream from the blob 
    MemoryStream ms = new MemoryStream(blob.Value); 

    // set the image property equal to a bitmap 
    // created from the memory stream 
    pictureBox1.Image = new Bitmap(ms);