391 lines
11 KiB
C#
391 lines
11 KiB
C#
using System;
|
|
using System.Data;
|
|
using System.Globalization;
|
|
|
|
namespace IndianHealthService.BMXNet
|
|
{
|
|
public class BMXNetDataReader : IDataReader
|
|
{
|
|
// The DataReader should always be open when returned to the user.
|
|
private bool m_fOpen = true;
|
|
|
|
// Keep track of the results and position
|
|
// within the resultset (starts prior to first record).
|
|
private RPMSDb.RPMSDbResultSet m_resultset;
|
|
private static int m_STARTPOS = -1;
|
|
private int m_nPos = m_STARTPOS;
|
|
|
|
/*
|
|
* Keep track of the connection in order to implement the
|
|
* CommandBehavior.CloseConnection flag. A null reference means
|
|
* normal behavior (do not automatically close).
|
|
*/
|
|
private BMXNetConnection m_connection = null;
|
|
|
|
/*
|
|
* Because the user should not be able to directly create a
|
|
* DataReader object, the constructors are
|
|
* marked as internal.
|
|
*/
|
|
internal BMXNetDataReader(RPMSDb.RPMSDbResultSet resultset)
|
|
{
|
|
m_resultset = resultset;
|
|
}
|
|
|
|
internal BMXNetDataReader(RPMSDb.RPMSDbResultSet resultset, BMXNetConnection connection)
|
|
{
|
|
m_resultset = resultset;
|
|
m_connection = connection;
|
|
}
|
|
|
|
/****
|
|
* METHODS / PROPERTIES FROM IDataReader.
|
|
****/
|
|
public int Depth
|
|
{
|
|
/*
|
|
* Always return a value of zero if nesting is not supported.
|
|
*/
|
|
get { return 0; }
|
|
}
|
|
|
|
public bool IsClosed
|
|
{
|
|
/*
|
|
* Keep track of the reader state - some methods should be
|
|
* disallowed if the reader is closed.
|
|
*/
|
|
get { return !m_fOpen; }
|
|
}
|
|
|
|
public int RecordsAffected
|
|
{
|
|
/*
|
|
* RecordsAffected is only applicable to batch statements
|
|
* that include inserts/updates/deletes. BMXNet always
|
|
* returns -1.
|
|
*/
|
|
get { return -1; }
|
|
}
|
|
|
|
public void Close()
|
|
{
|
|
/*
|
|
* Close the reader. BMXNet only changes the state,
|
|
* but an actual implementation would also clean up any
|
|
* resources used by the operation. For example,
|
|
* cleaning up any resources waiting for data to be
|
|
* returned by the server.
|
|
*/
|
|
m_fOpen = false;
|
|
}
|
|
|
|
public bool NextResult()
|
|
{
|
|
// BMXNet only returns a single resultset. However,
|
|
// DbDataAdapter expects NextResult to return a value.
|
|
return false;
|
|
}
|
|
|
|
public bool Read()
|
|
{
|
|
// Return true if it is possible to advance and if you are still positioned
|
|
// on a valid row. Because the data array in the resultset
|
|
// is two-dimensional, you must divide by the number of columns.
|
|
if (++m_nPos >= m_resultset.data.Length / m_resultset.metaData.Length)
|
|
return false;
|
|
else
|
|
return true;
|
|
}
|
|
|
|
public DataTable GetSchemaTable()
|
|
{
|
|
DataTable dtSchema = new DataTable();
|
|
|
|
dtSchema.Columns.Add("ColumnName", typeof(System.String));
|
|
dtSchema.Columns.Add("ColumnSize", typeof(Int32));
|
|
dtSchema.Columns.Add("ColumnOrdinal", typeof(Int32));
|
|
dtSchema.Columns.Add("NumericPrecision", typeof(Int16));
|
|
dtSchema.Columns.Add("NumericScale", typeof(Int16));
|
|
dtSchema.Columns.Add("DataType", typeof(System.Type));
|
|
dtSchema.Columns.Add("AllowDBNull", typeof(bool));
|
|
dtSchema.Columns.Add("IsReadOnly", typeof(bool));
|
|
dtSchema.Columns.Add("IsUnique", typeof(bool));
|
|
dtSchema.Columns.Add("IsRowVersion", typeof(bool));
|
|
dtSchema.Columns.Add("IsKey", typeof(bool));
|
|
dtSchema.Columns.Add("IsAutoIncrement", typeof(bool));
|
|
dtSchema.Columns.Add("IsLong", typeof(bool));
|
|
dtSchema.Columns.Add("BaseTableName", typeof(System.String));
|
|
dtSchema.Columns.Add("BaseColumnName", typeof(System.String));
|
|
|
|
dtSchema.ExtendedProperties.Add("BMXTable", m_resultset.fmFileID);
|
|
dtSchema.ExtendedProperties.Add("BMXKey", m_resultset.fmKeyField);
|
|
|
|
for (int i=0; i < m_resultset.metaData.GetLength(0); i++)
|
|
{
|
|
DataRow r = dtSchema.NewRow();
|
|
r["BaseTableName"] = m_resultset.fmFileID;
|
|
r["BaseColumnName"] = m_resultset.metaData[i].fmFieldID;
|
|
r["ColumnName"] = m_resultset.metaData[i].name;
|
|
r["ColumnSize"] = m_resultset.metaData[i].maxSize;
|
|
r["ColumnOrdinal"] = i;
|
|
r["NumericPrecision"] = 0;
|
|
r["NumericScale"] = 0;
|
|
r["DataType"] = m_resultset.metaData[i].type;
|
|
r["AllowDBNull"] = false;
|
|
r["IsReadOnly"] = m_resultset.metaData[i].fmReadOnly;
|
|
r["IsUnique"] = false;
|
|
if (m_resultset.metaData[i].name == "BMXIEN")
|
|
r["IsUnique"] = true;
|
|
r["IsRowVersion"] = false;
|
|
r["IsKey"] = m_resultset.metaData[i].fmKeyField;
|
|
r["IsAutoIncrement"] = false;
|
|
r["IsLong"] = false;
|
|
|
|
dtSchema.Rows.Add(r);
|
|
}
|
|
return dtSchema;
|
|
}
|
|
|
|
/****
|
|
* METHODS / PROPERTIES FROM IDataRecord.
|
|
****/
|
|
public int FieldCount
|
|
{
|
|
// Return the count of the number of columns, which in
|
|
// this case is the size of the column metadata
|
|
// array.
|
|
get { return m_resultset.metaData.Length; }
|
|
}
|
|
|
|
public String GetName(int i)
|
|
{
|
|
return m_resultset.metaData[i].name;
|
|
}
|
|
|
|
public String GetDataTypeName(int i)
|
|
{
|
|
/*
|
|
* Usually this would return the name of the type
|
|
* as used on the back end, for example 'smallint' or 'varchar'.
|
|
* BMXNet returns the simple name of the .NET Framework type.
|
|
*/
|
|
return m_resultset.metaData[i].type.Name;
|
|
}
|
|
|
|
public Type GetFieldType(int i)
|
|
{
|
|
// Return the actual Type class for the data type.
|
|
return m_resultset.metaData[i].type;
|
|
}
|
|
|
|
public Object GetValue(int i)
|
|
{
|
|
return m_resultset.data[m_nPos, i];
|
|
}
|
|
|
|
public int GetValues(object[] values)
|
|
{
|
|
int i = 0, j = 0;
|
|
for ( ; i < values.Length && j < m_resultset.metaData.Length; i++, j++)
|
|
{
|
|
values[i] = m_resultset.data[m_nPos, j];
|
|
}
|
|
|
|
return i;
|
|
}
|
|
|
|
public int GetOrdinal(string name)
|
|
{
|
|
// Look for the ordinal of the column with the same name and return it.
|
|
for (int i = 0; i < m_resultset.metaData.Length; i++)
|
|
{
|
|
if (0 == _cultureAwareCompare(name, m_resultset.metaData[i].name))
|
|
{
|
|
return i;
|
|
}
|
|
}
|
|
|
|
// Throw an exception if the ordinal cannot be found.
|
|
throw new IndexOutOfRangeException("Could not find specified column in results");
|
|
}
|
|
|
|
public object this [ int i ]
|
|
{
|
|
get { return m_resultset.data[m_nPos, i]; }
|
|
}
|
|
|
|
public object this [ String name ]
|
|
{
|
|
// Look up the ordinal and return
|
|
// the value at that position.
|
|
get { return this[GetOrdinal(name)]; }
|
|
}
|
|
|
|
public bool GetBoolean(int i)
|
|
{
|
|
/*
|
|
* Force the cast to return the type. InvalidCastException
|
|
* should be thrown if the data is not already of the correct type.
|
|
*/
|
|
return (bool)m_resultset.data[m_nPos, i];
|
|
}
|
|
|
|
public byte GetByte(int i)
|
|
{
|
|
/*
|
|
* Force the cast to return the type. InvalidCastException
|
|
* should be thrown if the data is not already of the correct type.
|
|
*/
|
|
return (byte)m_resultset.data[m_nPos, i];
|
|
}
|
|
|
|
public long GetBytes(int i, long fieldOffset, byte[] buffer, int bufferoffset, int length)
|
|
{
|
|
// BMXNet does not support this method.
|
|
throw new NotSupportedException("GetBytes not supported.");
|
|
}
|
|
|
|
public char GetChar(int i)
|
|
{
|
|
/*
|
|
* Force the cast to return the type. InvalidCastException
|
|
* should be thrown if the data is not already of the correct type.
|
|
*/
|
|
return (char)m_resultset.data[m_nPos, i];
|
|
}
|
|
|
|
public long GetChars(int i, long fieldoffset, char[] buffer, int bufferoffset, int length)
|
|
{
|
|
// BMXNet does not support this method.
|
|
throw new NotSupportedException("GetChars not supported.");
|
|
}
|
|
|
|
public Guid GetGuid(int i)
|
|
{
|
|
/*
|
|
* Force the cast to return the type. InvalidCastException
|
|
* should be thrown if the data is not already of the correct type.
|
|
*/
|
|
return (Guid)m_resultset.data[m_nPos, i];
|
|
}
|
|
|
|
public Int16 GetInt16(int i)
|
|
{
|
|
/*
|
|
* Force the cast to return the type. InvalidCastException
|
|
* should be thrown if the data is not already of the correct type.
|
|
*/
|
|
return (Int16)m_resultset.data[m_nPos, i];
|
|
}
|
|
|
|
public Int32 GetInt32(int i)
|
|
{
|
|
/*
|
|
* Force the cast to return the type. InvalidCastException
|
|
* should be thrown if the data is not already of the correct type.
|
|
*/
|
|
return (Int32)m_resultset.data[m_nPos, i];
|
|
}
|
|
|
|
public Int64 GetInt64(int i)
|
|
{
|
|
/*
|
|
* Force the cast to return the type. InvalidCastException
|
|
* should be thrown if the data is not already of the correct type.
|
|
*/
|
|
return (Int64)m_resultset.data[m_nPos, i];
|
|
}
|
|
|
|
public float GetFloat(int i)
|
|
{
|
|
/*
|
|
* Force the cast to return the type. InvalidCastException
|
|
* should be thrown if the data is not already of the correct type.
|
|
*/
|
|
return (float)m_resultset.data[m_nPos, i];
|
|
}
|
|
|
|
public double GetDouble(int i)
|
|
{
|
|
/*
|
|
* Force the cast to return the type. InvalidCastException
|
|
* should be thrown if the data is not already of the correct type.
|
|
*/
|
|
return (double)m_resultset.data[m_nPos, i];
|
|
}
|
|
|
|
public String GetString(int i)
|
|
{
|
|
/*
|
|
* Force the cast to return the type. InvalidCastException
|
|
* should be thrown if the data is not already of the correct type.
|
|
*/
|
|
return (String)m_resultset.data[m_nPos, i];
|
|
}
|
|
|
|
public Decimal GetDecimal(int i)
|
|
{
|
|
/*
|
|
* Force the cast to return the type. InvalidCastException
|
|
* should be thrown if the data is not already of the correct type.
|
|
*/
|
|
return (Decimal)m_resultset.data[m_nPos, i];
|
|
}
|
|
|
|
public DateTime GetDateTime(int i)
|
|
{
|
|
/*
|
|
* Force the cast to return the type. InvalidCastException
|
|
* should be thrown if the data is not already of the correct type.
|
|
*/
|
|
return (DateTime)m_resultset.data[m_nPos, i];
|
|
}
|
|
|
|
public IDataReader GetData(int i)
|
|
{
|
|
/*
|
|
* BMXNet code does not support this method. Need,
|
|
* to implement this in order to expose nested tables and
|
|
* other hierarchical data.
|
|
*/
|
|
throw new NotSupportedException("GetData not supported.");
|
|
}
|
|
|
|
public bool IsDBNull(int i)
|
|
{
|
|
return m_resultset.data[m_nPos, i] == DBNull.Value;
|
|
}
|
|
|
|
/*
|
|
* Implementation specific methods.
|
|
*/
|
|
private int _cultureAwareCompare(string strA, string strB)
|
|
{
|
|
return CultureInfo.CurrentCulture.CompareInfo.Compare(strA, strB, CompareOptions.IgnoreKanaType | CompareOptions.IgnoreWidth | CompareOptions.IgnoreCase);
|
|
}
|
|
|
|
void IDisposable.Dispose()
|
|
{
|
|
this.Dispose(true);
|
|
System.GC.SuppressFinalize(this);
|
|
}
|
|
|
|
private void Dispose(bool disposing)
|
|
{
|
|
if (disposing)
|
|
{
|
|
try
|
|
{
|
|
this.Close();
|
|
}
|
|
catch (Exception e)
|
|
{
|
|
throw new SystemException("An exception of type " + e.GetType() +
|
|
" was encountered while closing the BMXNetDataReader.");
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
} |