internal unsafe int SetColumns(
JET_SESID sesid,
JET_TABLEID tableid,
ColumnValue[] columnValues,
NATIVE_SETCOLUMN *nativeColumns,
int i,
void *buffer,
int bufferSize,
bool hasValue)
{
Debug.Assert(this == columnValues[i], "SetColumns should be called on the current object");
NATIVE_SETCOLUMN setcolumn = this.MakeNativeSetColumn();
if (hasValue)
{
setcolumn.cbData = checked ((uint)bufferSize);
setcolumn.pvData = new IntPtr(buffer);
if (0 == bufferSize)
{
setcolumn.grbit |= (uint)SetColumnGrbit.ZeroLength;
}
}
nativeColumns[i] = setcolumn;
int err = i == columnValues.Length - 1
? Api.Impl.JetSetColumns(sesid, tableid, nativeColumns, columnValues.Length)
: columnValues[i + 1].SetColumns(sesid, tableid, columnValues, nativeColumns, i + 1);
this.Error = (JET_err)nativeColumns[i].err;
return(err);
}
public void Setup()
{
this.managed = new JET_SETCOLUMN
{
cbData = 1,
columnid = new JET_COLUMNID { Value = 2 },
grbit = SetColumnGrbit.AppendLV,
ibLongValue = 3,
itagSequence = 4,
};
this.native = this.managed.GetNativeSetcolumn();
}
/// <summary>
/// Gets the NATIVE_SETCOLUMN structure that represents the object.
/// </summary>
/// <returns>A NATIVE_SETCOLUMN structure whose fields match the class.</returns>
internal NATIVE_SETCOLUMN GetNativeSetcolumn()
{
var setinfo = new NATIVE_SETCOLUMN
{
columnid = this.columnid.Value,
cbData = checked ((uint)this.cbData),
grbit = (uint)this.grbit,
ibLongValue = checked ((uint)this.ibLongValue),
itagSequence = checked ((uint)this.itagSequence),
};
return(setinfo);
}
/// <summary>
/// Recursive SetColumns method for data pinning. This populates the buffer and
/// calls the inherited SetColumns method.
/// </summary>
/// <param name="sesid">The session to use.</param>
/// <param name="tableid">
/// The table to set the columns in. An update should be prepared.
/// </param>
/// <param name="columnValues">
/// Column values to set.
/// </param>
/// <param name="nativeColumns">
/// Structures to put the pinned data in.
/// </param>
/// <param name="i">Offset of this object in the array.</param>
/// <returns>An error code.</returns>
internal unsafe override int SetColumns(JET_SESID sesid, JET_TABLEID tableid, ColumnValue[] columnValues, NATIVE_SETCOLUMN* nativeColumns, int i)
{
if (null != this.Value)
{
fixed (void* buffer = this.Value)
{
return this.SetColumns(
sesid, tableid, columnValues, nativeColumns, i, buffer, this.Value.Length, true);
}
}
return this.SetColumns(sesid, tableid, columnValues, nativeColumns, i, null, 0, false);
}
/// <summary>
/// Create a native SetColumn from this object.
/// </summary>
/// <param name="setcolumn">The native setcolumn structure to fill in.</param>
private void MakeNativeSetColumn(ref NATIVE_SETCOLUMN setcolumn)
{
setcolumn.columnid = this.Columnid.Value;
setcolumn.grbit = (uint)this.SetGrbit;
setcolumn.itagSequence = checked((uint)this.ItagSequence);
}
/// <summary>
/// Recursive SetColumns function used to pin data.
/// </summary>
/// <param name="sesid">The session to use.</param>
/// <param name="tableid">
/// The table to set the columns in. An update should be prepared.
/// </param>
/// <param name="columnValues">
/// Column values to set.
/// </param>
/// <param name="nativeColumns">
/// Structures to put the pinned data in.
/// </param>
/// <param name="i">Offset of this object in the array.</param>
/// <param name="buffer">The buffer for this object.</param>
/// <param name="bufferSize">Size of the buffer for ths object.</param>
/// <param name="hasValue">True if this object is non null.</param>
/// <returns>An error code.</returns>
/// <remarks>
/// This is marked as internal because it uses the NATIVE_SETCOLUMN type
/// which is also marked as internal. It should be treated as a protected
/// method though.
/// </remarks>
internal unsafe int SetColumns(
JET_SESID sesid,
JET_TABLEID tableid,
ColumnValue[] columnValues,
NATIVE_SETCOLUMN* nativeColumns,
int i,
void* buffer,
int bufferSize,
bool hasValue)
{
Debug.Assert(this == columnValues[i], "SetColumns should be called on the current object");
this.MakeNativeSetColumn(ref nativeColumns[i]);
if (hasValue)
{
nativeColumns[i].cbData = checked((uint)bufferSize);
nativeColumns[i].pvData = new IntPtr(buffer);
if (0 == bufferSize)
{
nativeColumns[i].grbit |= (uint)SetColumnGrbit.ZeroLength;
}
}
int err = i == columnValues.Length - 1
? Api.Impl.JetSetColumns(sesid, tableid, nativeColumns, columnValues.Length)
: columnValues[i + 1].SetColumns(sesid, tableid, columnValues, nativeColumns, i + 1);
this.Error = (JET_wrn)nativeColumns[i].err;
return err;
}
/// <summary> /// Recursive SetColumns method for data pinning. This should populate the buffer and /// call the inherited SetColumns method. /// </summary> /// <param name="sesid">The session to use.</param> /// <param name="tableid"> /// The table to set the columns in. An update should be prepared. /// </param> /// <param name="columnValues"> /// Column values to set. /// </param> /// <param name="nativeColumns"> /// Structures to put the pinned data in. /// </param> /// <param name="i">Offset of this object in the array.</param> /// <returns>An error code.</returns> internal abstract unsafe int SetColumns(JET_SESID sesid, JET_TABLEID tableid, ColumnValue[] columnValues, NATIVE_SETCOLUMN* nativeColumns, int i);
/// <summary>
/// Gets the NATIVE_SETCOLUMN structure that represents the object.
/// </summary>
/// <returns>A NATIVE_SETCOLUMN structure whose fields match the class.</returns>
internal NATIVE_SETCOLUMN GetNativeSetcolumn()
{
var setinfo = new NATIVE_SETCOLUMN
{
columnid = this.columnid.Value,
cbData = checked((uint) this.cbData),
grbit = (uint) this.grbit,
ibLongValue = checked((uint) this.ibLongValue),
itagSequence = checked((uint) this.itagSequence),
};
return setinfo;
}
/// <summary>
/// Create a native SetColumn from this object.
/// </summary>
/// <param name="setcolumn">The native setcolumn structure to fill in.</param>
private void MakeNativeSetColumn(ref NATIVE_SETCOLUMN setcolumn)
{
setcolumn.columnid = this.Columnid.Value;
setcolumn.grbit = (uint)this.SetGrbit;
setcolumn.itagSequence = checked ((uint)this.ItagSequence);
}
