在C#上调用Oracle中的函数可以通过以下步骤实现:
string connectionString = "Data Source=your_database_address;User Id=your_username;Password=your_password;";
OracleConnection connection = new OracleConnection(connectionString);
connection.Open();
OracleCommand command = new OracleCommand();
command.Connection = connection;
command.CommandText = "your_function_name";
command.CommandType = CommandType.StoredProcedure;
OracleParameter inputParam = new OracleParameter("input_param_name", OracleDbType.Varchar2);
inputParam.Value = "input_value";
command.Parameters.Add(inputParam);
OracleParameter outputParam = new OracleParameter("output_param_name", OracleDbType.Varchar2);
outputParam.Direction = ParameterDirection.Output;
command.Parameters.Add(outputParam);
command.ExecuteNonQuery();
string result = outputParam.Value.ToString();
connection.Close();
connection.Dispose();
需要注意的是,以上代码仅为示例,实际使用时需要根据具体情况进行调整。另外,如果你使用的是Oracle.ManagedDataAccess.dll,需要将代码中的OracleConnection、OracleCommand、OracleParameter等类名改为对应的Managed版本。
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