[815] | 1 | using System;
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| 2 | using System.Data;
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| 3 | using System.Data.Common;
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| 4 |
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| 5 | namespace IndianHealthService.BMXNet
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| 6 | {
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| 7 | public class BMXNetCommand : System.Data.Common.DbCommand, IDbCommand
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| 8 | {
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| 9 | BMXNetConnection m_connection;
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| 10 | BMXNetTransaction m_txn;
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| 11 | string m_sCmdText;
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| 12 | UpdateRowSource m_updatedRowSource = UpdateRowSource.None;
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| 13 | BMXNetParameterCollection m_parameters = new BMXNetParameterCollection();
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| 14 |
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| 15 | // the default constructor
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| 16 | public BMXNetCommand()
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| 17 | {
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| 18 | }
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| 19 |
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| 20 | // other constructors
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| 21 | public BMXNetCommand(string cmdText)
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| 22 | {
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| 23 | m_sCmdText = cmdText;
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| 24 | }
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| 25 |
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| 26 | public BMXNetCommand(string cmdText, BMXNetConnection connection)
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| 27 | {
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| 28 | m_sCmdText = cmdText;
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| 29 | m_connection = connection;
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| 30 | }
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| 31 |
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| 32 | public BMXNetCommand(string cmdText, BMXNetConnection connection, BMXNetTransaction txn)
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| 33 | {
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| 34 | m_sCmdText = cmdText;
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| 35 | m_connection = connection;
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| 36 | m_txn = txn;
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| 37 | }
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| 38 |
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| 39 | /****
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| 40 | * IMPLEMENT THE REQUIRED PROPERTIES.
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| 41 | ****/
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| 42 | override public string CommandText
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| 43 | {
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| 44 | get { return m_sCmdText; }
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| 45 | set { m_sCmdText = value; }
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| 46 | }
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| 47 |
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| 48 | override public int CommandTimeout
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| 49 | {
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| 50 | /*
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| 51 | * BMXNet does not support a command time-out. As a result,
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| 52 | * for the get, zero is returned because zero indicates an indefinite
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| 53 | * time-out period. For the set, throw an exception.
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| 54 | */
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| 55 | get { return 0; }
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| 56 | set { if (value != 0) throw new NotSupportedException(); }
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| 57 | }
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| 58 |
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| 59 | override public CommandType CommandType
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| 60 | {
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| 61 | /*
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| 62 | * BMXNet only supports CommandType.Text.
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| 63 | */
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| 64 | get { return CommandType.Text; }
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| 65 | set { if (value != CommandType.Text) throw new NotSupportedException(); }
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| 66 | }
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| 67 |
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| 68 | protected override DbConnection DbConnection
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| 69 | {
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| 70 | get
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| 71 | {
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| 72 | return m_connection;
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| 73 | }
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| 74 | set
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| 75 | {
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| 76 | if (m_connection != value)
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| 77 | this.Transaction = null;
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| 78 |
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| 79 | m_connection = (BMXNetConnection)value;
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| 80 | }
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| 81 | }
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| 82 |
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| 83 | new public IDbConnection Connection
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| 84 | {
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| 85 | /*
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| 86 | * The user should be able to set or change the connection at
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| 87 | * any time.
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| 88 | */
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| 89 | get { return m_connection; }
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| 90 | set
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| 91 | {
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| 92 | /*
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| 93 | * The connection is associated with the transaction
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| 94 | * so set the transaction object to return a null reference if the connection
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| 95 | * is reset.
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| 96 | */
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| 97 | if (m_connection != value)
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| 98 | this.Transaction = null;
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| 99 |
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| 100 | m_connection = (BMXNetConnection)value;
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| 101 | }
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| 102 | }
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| 103 |
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| 104 | new public BMXNetParameterCollection Parameters
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| 105 | {
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| 106 | get { return m_parameters; }
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| 107 | }
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| 108 |
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| 109 | IDataParameterCollection IDbCommand.Parameters
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| 110 | {
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| 111 | get { return m_parameters; }
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| 112 | }
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| 113 |
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| 114 | override protected DbParameterCollection DbParameterCollection
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| 115 | {
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| 116 | get
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| 117 | {
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| 118 | throw new Exception("The method or operation is not implemented.");
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| 119 | }
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| 120 | }
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| 121 |
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| 122 | new public IDbTransaction Transaction
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| 123 | {
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| 124 | /*
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| 125 | * Set the transaction. Consider additional steps to ensure that the transaction
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| 126 | * is compatible with the connection, because the two are usually linked.
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| 127 | */
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| 128 | get { return m_txn; }
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| 129 | set { m_txn = (BMXNetTransaction)value; }
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| 130 | }
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| 131 |
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| 132 | override protected DbTransaction DbTransaction
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| 133 | {
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| 134 | /*
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| 135 | * Set the transaction. Consider additional steps to ensure that the transaction
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| 136 | * is compatible with the connection, because the two are usually linked.
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| 137 | */
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| 138 | get
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| 139 | {
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| 140 | throw new Exception("The method or operation is not implemented.");
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| 141 | }
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| 142 | set
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| 143 | {
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| 144 | throw new Exception("The method or operation is not implemented.");
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| 145 | }
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| 146 | }
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| 147 |
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| 148 | override public bool DesignTimeVisible
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| 149 | {
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| 150 | get
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| 151 | {return false ; }
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| 152 | set { ;}
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| 153 | }
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| 154 |
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| 155 | override public UpdateRowSource UpdatedRowSource
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| 156 | {
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| 157 | get { return m_updatedRowSource; }
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| 158 | set { m_updatedRowSource = value; }
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| 159 | }
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| 160 |
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| 161 |
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| 162 | /****
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| 163 | * IMPLEMENT THE REQUIRED METHODS.
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| 164 | ****/
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| 165 | override public void Cancel()
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| 166 | {
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| 167 | // BMXNet does not support canceling a command
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| 168 | // once it has been initiated.
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| 169 | throw new NotSupportedException();
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| 170 | }
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| 171 |
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| 172 | new public IDbDataParameter CreateParameter()
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| 173 | {
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| 174 | return (IDbDataParameter)(new BMXNetParameter());
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| 175 | }
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| 176 |
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| 177 | override protected DbParameter CreateDbParameter()
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| 178 | {
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| 179 | throw new Exception("The method or operation is not implemented.");
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| 180 | }
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| 181 |
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| 182 | override public int ExecuteNonQuery()
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| 183 | {
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| 184 | /*
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| 185 | * ExecuteNonQuery is intended for commands that do
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| 186 | * not return results, instead returning only the number
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| 187 | * of records affected.
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| 188 | */
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| 189 |
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| 190 | // There must be a valid and open connection.
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| 191 | if (m_connection == null || m_connection.State != ConnectionState.Open)
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| 192 | throw new InvalidOperationException("Connection must valid and open");
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| 193 |
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| 194 | // Execute the command.
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| 195 | RPMSDb.RPMSDbResultSet resultset;
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| 196 | m_connection.RPMSDb.Execute(m_sCmdText, out resultset);
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| 197 |
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| 198 | // Return the number of records affected.
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| 199 | return resultset.recordsAffected;
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| 200 | }
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| 201 |
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| 202 | new public IDataReader ExecuteReader()
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| 203 | {
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| 204 | /*
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| 205 | * ExecuteReader should retrieve results from the data source
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| 206 | * and return a DataReader that allows the user to process
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| 207 | * the results.
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| 208 | */
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| 209 | // There must be a valid and open connection.
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| 210 | if (m_connection == null || m_connection.State != ConnectionState.Open)
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| 211 | throw new InvalidOperationException("Connection must valid and open");
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| 212 |
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| 213 | // Execute the command.
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| 214 | RPMSDb.RPMSDbResultSet resultset;
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| 215 | m_connection.RPMSDb.Execute(m_sCmdText, out resultset);
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| 216 |
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| 217 | return new BMXNetDataReader(resultset);
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| 218 | }
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| 219 |
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| 220 | new public IDataReader ExecuteReader(CommandBehavior behavior)
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| 221 | {
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| 222 | /*
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| 223 | * ExecuteReader should retrieve results from the data source
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| 224 | * and return a DataReader that allows the user to process
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| 225 | * the results.
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| 226 | */
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| 227 |
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| 228 | // There must be a valid and open connection.
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| 229 | if (m_connection == null || m_connection.State != ConnectionState.Open)
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| 230 | throw new InvalidOperationException("Connection must valid and open");
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| 231 |
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| 232 | /*If SchemaOnly or KeyInfo behavior, Set BMXSchema flag
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| 233 | *execute the command, then unset the BMXSchema flag
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| 234 | *Otherwise, just Execute the command.
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| 235 | */
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| 236 | RPMSDb.RPMSDbResultSet resultset;
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| 237 | if (((behavior & (CommandBehavior.SchemaOnly | CommandBehavior.KeyInfo)) > 0))
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| 238 | {
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| 239 | m_connection.bmxNetLib.TransmitRPC("BMX SCHEMA ONLY", "TRUE");
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| 240 | m_connection.RPMSDb.Execute(m_sCmdText, out resultset);
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| 241 | m_connection.bmxNetLib.TransmitRPC("BMX SCHEMA ONLY", "FALSE");
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| 242 | }
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| 243 | else
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| 244 | {
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| 245 | m_connection.RPMSDb.Execute(m_sCmdText, out resultset);
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| 246 | }
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| 247 |
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| 248 | /*
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| 249 | * The only CommandBehavior option supported by BMXNet
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| 250 | * is the automatic closing of the connection
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| 251 | * when the user is done with the reader.
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| 252 | */
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| 253 | if (behavior == CommandBehavior.CloseConnection)
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| 254 | return new BMXNetDataReader(resultset, m_connection);
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| 255 | else
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| 256 | return new BMXNetDataReader(resultset);
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| 257 | }
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| 258 |
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| 259 | override protected DbDataReader ExecuteDbDataReader(CommandBehavior behavior)
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| 260 | {
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| 261 | throw new Exception("The method or operation is not implemented.");
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| 262 | }
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| 263 |
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| 264 | override public object ExecuteScalar()
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| 265 | {
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| 266 | /*
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| 267 | * ExecuteScalar assumes that the command will return a single
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| 268 | * row with a single column, or if more rows/columns are returned
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| 269 | * it will return the first column of the first row.
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| 270 | */
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| 271 |
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| 272 | // There must be a valid and open connection.
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| 273 | if (m_connection == null || m_connection.State != ConnectionState.Open)
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| 274 | throw new InvalidOperationException("Connection must valid and open");
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| 275 |
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| 276 | // Execute the command.
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| 277 | RPMSDb.RPMSDbResultSet resultset;
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| 278 | m_connection.RPMSDb.Execute(m_sCmdText, out resultset);
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| 279 |
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| 280 | // Return the first column of the first row.
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| 281 | // Return a null reference if there is no data.
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| 282 | if (resultset.data.Length == 0)
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| 283 | return null;
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| 284 |
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| 285 | return resultset.data[0, 0];
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| 286 | }
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| 287 |
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| 288 | override public void Prepare()
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| 289 | {
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| 290 | // BMXNet Prepare is a no-op.
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| 291 | }
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| 292 |
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| 293 | void IDisposable.Dispose()
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| 294 | {
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| 295 | this.Dispose(true);
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| 296 | System.GC.SuppressFinalize(this);
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| 297 | }
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| 298 |
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| 299 | //private void Dispose(bool disposing)
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| 300 | //{
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| 301 | // /*
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| 302 | // * Dispose of the object and perform any cleanup.
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| 303 | // */
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| 304 | //}
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| 305 |
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| 306 | /****
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| 307 | * IMPLEMENT BMX-Specific METHODS.
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| 308 | ****/
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| 309 | public void BMXBuildUpdateCommand(DataTable dtSchema)
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| 310 | {
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| 311 | string sText = "UPDATE ";
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| 312 | sText += "@File, ";
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| 313 | sText += "@Record, ";
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| 314 |
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| 315 | //Build Parameters array
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| 316 | BMXNetParameter[] parms = new BMXNetParameter[dtSchema.Rows.Count+2];
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| 317 |
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| 318 | parms[0] = new BMXNetParameter("@File", DbType.String);
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| 319 | parms[0].SourceVersion = DataRowVersion.Original;
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| 320 | parms[0].SourceColumn = dtSchema.ExtendedProperties["BMXTable"].ToString();
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| 321 | Parameters.Add(parms[0]);
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| 322 |
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| 323 | parms[1] = new BMXNetParameter("@Record", DbType.String);
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| 324 | parms[1].SourceVersion = DataRowVersion.Original;
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| 325 | parms[1].SourceColumn = dtSchema.ExtendedProperties["BMXKey"].ToString();;
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| 326 | Parameters.Add(parms[1]);
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| 327 |
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| 328 | int i = 1;
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| 329 | foreach (DataRow r in dtSchema.Rows)
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| 330 | {
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| 331 | //Make a parameter for the Key Field and all non-ReadOnly fields
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| 332 | if ( ((bool) r["IsReadOnly"] == false) || ( (bool) r["IsKey"] == true ) )
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| 333 | {
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| 334 | i++;
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| 335 | parms[i] = new BMXNetParameter(r["ColumnName"].ToString(), DbType.String);
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| 336 | parms[i].SourceVersion = DataRowVersion.Current;
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| 337 | parms[i].SourceColumn = r["BaseColumnName"].ToString(); //FM FieldNumber
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| 338 | parms[i].IsKey = Convert.ToBoolean(r["IsKey"]);
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| 339 | Parameters.Add(parms[i]);
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| 340 | }
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| 341 | }
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| 342 | }
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| 343 | }
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| 344 | }
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