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Showing content from https://docs.microsoft.com/en-us/dotnet/api/system.data.oracleclient.oraclestring below:

OracleString Struct (System.Data.OracleClient) | Microsoft Learn

Represents a variable-length stream of characters to be stored in or retrieved from the database.

public value class OracleString : IComparable, System::Data::SqlTypes::INullable

public struct OracleString : IComparable, System.Data.SqlTypes.INullable

type OracleString = struct
    interface INullable

Public Structure OracleString
Implements IComparable, INullable

Inheritance

Implements

using System;  
using System.Data.OracleClient;  
public class Class1 {  
   public static void Main() {  
      OracleString oraclestring1 = new OracleString("MyOracleString1");  
      OracleString oraclestring2 = new OracleString("MyOracleString2");  
      OracleString oraclestring3 = new OracleString("MyOracleString1");  

      // Type: System.Data.OracleClient.OracleString  
      Console.WriteLine("Type: " + oraclestring1.GetType());  

      // Length: 15  
      Console.WriteLine("Length: " + oraclestring1.Length);  

      // False  
      Console.WriteLine(oraclestring1.IsNull);  

      // -1  
      Console.WriteLine(oraclestring1.CompareTo(oraclestring2));  

      // 0  
      Console.WriteLine(oraclestring1.CompareTo(oraclestring3));  

      // 1  
      Console.WriteLine(oraclestring2.CompareTo(oraclestring3));  

      // False  
      Console.WriteLine(oraclestring1.Equals(oraclestring2));  

      // True  
      Console.WriteLine(oraclestring1.Equals(oraclestring3));  

      // MyOracleString1  
      Console.WriteLine(oraclestring1.Value);  

      // MyOracleString2  
      Console.WriteLine(oraclestring2.ToString());  
   }  
}  

To obtain an OracleString object, call the GetOracleString method.

Represents an empty string that can be assigned to the Value property of an instance of the OracleString structure.

Represents a null value that can be assigned to the Value property of an instance of the OracleString structure.

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